®
Mechanical Seals Conventional and Gas-lubricated for Pumps, Compressors, Agitators and Similar Applications. Seal Supply Systems and Components. Design Manual 15.3 BURGMANN in your vicinity
Service Center Ost KE-Burgmann U.K. INDIA MYANMAR TAIWAN Germany Airpark Merseburg Eaton Bank, Congleton Outside Europe Burgmann India PVT. LTD. One Co. Ltd. Friendly Trading Co., Inc. Hans-Grade-Straße 4 GB-Cheshire SW12 1NZ A.K. Industrial Estate No. 22, 7 Mile, Pyay Rd., 11 Fl.-1, No. 1 Pao Sen Road Kundenbetreuungs-Center D-06217 Merseburg Phone + 44 / 1260 / 29 12 89 ARGENTINA Madina Manzil Compound Mayangone Township Yong Ho City, Taipei Hsien Nord / Werksbüro Bremen Phone +49 / 3461/ 84 29 20 Telefax + 44 / 1260 / 29 13 03 Chilicote S.A. S.V. Road, Goregaon (West) Yangon, Myanmar Taiwan / R.O.C. Sinstorfer Kirchweg 74- 92 Telefax +49 / 3461/ 84 29 30 Avda. Julio A. Roca 546 Bombay 400 062 Phone +951 24 49 69 Phone +886 / 22 / 9 27 90 70 D-21 077 Hamburg GREECE Phone +91/ 22 / 8 74 15 34 Telefax +951 65 04 69 Telefax +886 / 22 / 9 27 93 77 Service Center Rhein-Main C1067 ABN Buenos Aires, Argentina Phone +49 / 421 / 56 23 75 A.G. Stambolidis & Co. 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Box 143 Burgmann Pars Av. La Marina 1321, San Miguel S.S. Ýstanbul Kimya Sanayiciler Industriveien 25 D CANADA Phone +49 / 2236 / 38 33 0 BELGIUM TG-Burgmann Ltd. Sealing Systems Co. Lima - Peru Toplu Ýþyeri Yapý Kooperatifi Telefax +49 / 2236 / 38 33 20 N-2021 Skedsmokorset 3rd Floor, No. 169 Phone +51/12 / 63 76 70 E Blok No. 4 Burgmann B.V.B.A. Phone +47 / 64 / 83 75 50 3225 Mainway Drive Zagerijstraat 11 Burlington, Ontario between Mofateh St. & Telefax +51/12 / 63 02 86 TR-81720 Tepeören-Tuzla/Istanbul Kundenbetreuungs-Center Telefax +47 / 64 / 83 75 75 Amir Atabak St. Phone +90 / 21 6 / 5 93 02 93 B-2960 Sint-Job-in't-Goor Canada L7M1A6 PHILIPPINES Ost / Werksbüro Leipzig Motahari Ave. Telefax +90 / 21 6 / 5 93 02 98 Phone +32 / 3 / 6 33 99 44 POLAND Phone +1/ 905 / 3 35 14 40 Burgmann (Philippines) Inc. 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Telefax +86 21 64140728 Port Elisabeth, Richardsbay, Secunda, Telefax +49 / 6241 / 93 25 30 Phone +358 / 9 / 82 55 01 SK-82104 Bratislava Off Jalan SS13/6 97A Ly Tu Trong Street, District 1 Sasolburg Telefax +358 / 9 / 82 55 02 00 Phone +421 / 2 / 43 41 35 85 COLOMBIA Subang Jaya Industrial Estate Ho Chi Minh City, Vietnam Service Center Bayern 47500 Petaling Jaya Also responsible for: Namibia, Phone +84 / 8 / 8 24 30 46 Tiivistetekniikka Oy Telefax +421 / 2 / 43 41 36 03 Inversiones y Representaciones Burgmannstr. 1 Phone +60 / 3 / 56 34 86 24 Botswana, Swaziland, Zambia, Telefax +84 / 8 / 8 22 35 82 Mäkituvantie 5 Tobón Velez D-82547 Eurasburg SPAIN Telefax +60 / 3 / 56 34 97 42 Zimbabwe, Mozambique, Mauritius, SF-01510 Vantaa Cr. 7-64-50-Ext. 301 Phone +49 / 8171 / 23 17 37 Burgmann Ibérica S.A. Branch Offices: Jojor Bahru, Kuantan, Congo, Ethiopia, Uganda, Tanzania Phone +358 / 207 65 171 Santafé de Bogota Telefax +49 / 81 71 / 23 16 63 Polígono Európolis, Calle X, 1 Bukit, Selangor Telefax +359 / 207 65 20 07 Phone +57 / 1 / 2 11 76 75 E-28230 Las Rozas, Madrid Telefax +57 / 1 / 2 11 76 75 Service Center Köln MEXICO FRANCE Phone +34-91-7105630 Gewerbegebiet Rheinbogen Burgmann Mexico S.A. de C.V. Burgmann S.A.S. Telefax +34-91-6375798 ECUADOR Vorgebirgsstr. 27 Calzada de Guadalupe Zone d’Activité les Perriers Petroconsultant S.A. D-50389 Wesseling SWEDEN Num. 350-6, Col. El Cerrito 106/108 Route de Cormeilles Fco. de Goya 262 Phone +49 / 2236 / 38 33 50 Burgmann Skandinavien AB C.P. 54720, Cuautitlán Izcalli, BP 96 Urb. Los Cipresses II Telefax +49 / 2236 / 38 33 70 Svärmaregatan 3 Estado de México, Mexico City F-78505 Sartrouville El Condado S-60361 Norrköping Phone +52 / 55 / 58 72 53 93 Service Center Marl Phone +33 / 1/ 30 86 50 20 P.O. Box 17-17-1254 Phone +46 /11 /14 00 05 Telefax +52 / 55 / 58 72 64 93 Geb. 1192, PB 14 Telefax +33 /1/ 39 15 16 07 Quito Telefax +46 /11 /14 00 15 Branch Offices: Tampico, Monterrey, Paul-Baumann-Str. 1 Branch Offices: Phone +593 / 2 / 49 17 52 Burgmann Industries Queretaro, Villahermosa, Puebla, D-45764 Marl Lyon, Schiltigheim, Telefax +593 / 2 / 49 35 09 SWITZERLAND Guadalajara, Toluca, Orizaba, Celaya, Phone +49 / 2365 / 4 98 61 64 Le Havre, Marseille GmbH & Co. KG Burgmann Schweiz AG EGYPT Coatzacoalcos, Colima, Metepec Telefax +49 / 2365 / 4 98 61 60 Hofstrasse 21 , CH-8181 Höri GREAT BRITAIN Alimex Phone +41 /1/ 8 60 88 00 MOROCCO Äußere Sauerlacher Str. 6–10 Service Center Nord EagleBurgmann Industries 160 Ahmed Shawky St. Telefax +41/1/ 8 61 01 35 Petro-Mat Sinstorfer Kirchweg 74-92 UK LP El-Maimary Towers Appt. 82 B D-82515 Wolfratshausen Angle Rue Michel de l'Hôpital D-21 077 Hamburg 12, Welton Road Roushdy, Alexandria et Rue Jules Cesar Phone +49 / 40 / 76 10 46 44 Wedgnock Industrial Estate Phone +20 / 3 / 5 46 48 76 Phone +49(0)8171/ 23-0 Casablanca 05 Telefax +49 / 40 / 76 10 46 41 GB-Warwick CV 34 5PZ Telefax +20 / 3 / 5 46 81 75 Phone +212 / 240 / 87 99 Telefax +49(0)8171/ 231214 Phone +44 /1926 / 41 76 00 Brach offices: Cairo Telefax +212 / 240 /19 39
Telefax +44 /1926 / 41 76 17 www.burgmann.com 30.11.2004 All technical specifications are based on extensive tests and our many years of experience. The diversity of possible applications means, however, that they can The worldwide serve only as guide values. We must be notified of the exact conditions of application Alliance for Sealing Technology before we can provide any guarantee for a specific case. Subject to change. Contents
Contents3 Seal Selection by Media
25 Mechanical Seals for Pumps and Compressors
65 Gas-lubricated Mechanical Seals for Pumps, Mixers, Compressors Gas Supply Systems 81 Mechanical Seals for Agitators, Mixers and Reactors
91 Supply Systems and Components for liquid-lubricated Mechanical Seals 111 Case Examples and Recommendations for Applications
135 Notes on Design, Installation and Operation
The Burgmann Important Note: Design Manual for All the technical references are based on 2 Alpha-numerical Mechanical Seals extensive tests and our many years of Product Index experience. The diversity of possible listing all the mechanical seals is now available in the applications means, that they can serve in this catalogue and a Internet. as guide values only. No guarantee can Keyword Index At www.burgmann.com be given for a specific case unless the you will not only find exact conditions of application are know to use and confirmed in a special agree- Table of Materials all the main seals covered ment. For particularly critical conditions see inside back cover. by this catalogue but of operation, e. g. involving a mixture of also the CASS products, we recommend you consult Seal Selection Program with our specialist engineers. It should be and a great deal more noted that the maximum values of each operating parameter cannot be applied at besides. the same time. Subject to change.
Burgmann Mechanical Seals Design Manual 15.3 1 Index
Product Index Keyword Index
AGS ...... 67, 74,117 M78N ...... 30, 31 Agglomerator ...... 134 Pump, feed ...... 60, 126 AGS461...... 74, 75, 84 M7F ...... 31 Agitator bead mill ...... 119 Pump, flume water ...... 133 AGS481...... 74, 82 M7N . . . . . 30, 118, 132, 129, 139 Ammonia compressor ...... 115 Pump, gas oil service ...... 121 AGSR ...... 67, 74, 75, 86 M7N/H7N ...... 32, 48 API 610 ...... 93, 137, 144 Pump, gear ...... 118 Cartex-GSD ...... 56, 67, 70, 121 M7N/M7N ...... 32, 48 API 682 ...... 100, 120, 122 Pump, GLP delivery ...... 121 Cartex-SN,-SNO,-QN/TN,-DN,-HDN . . M7S2 ...... 31 Axial runout tolerance ...... 141 Pump, home and garden ...... 26, 38 ...... 56, 57 MAA ...... 93, 108 Bottom entry drive ...... 89, 119 Pump, hot water ...... 125 CGS-(K)D ...... 67, 69, 119 MAF ...... 93, 108 Buffer fluid systems ...... 92 Pump, juice ...... 133 CGS-KN ...... 68, 69 MF95N ...... 39 Buffer fluid unit ...... 109 Pump, lubricating oil ...... 132 CSR ...... 69, 79 MFL65 ...... 63, 121,122 Buffer medium ...... 93 Pump, main delivery ...... 113 DGS ...... 67, 76, 115 MFL85F ...... 40 Calander ...... 129 Pump, main feed ...... 126 DHE ...... 93, 110, 117 MFL85GS ...... 40, 67, 72 Chemicals ...... 118 Pump, multiphase ...... 112 DRE ...... 93, 110 MFL85N . . 40, 119, 122, 129, 130 Circuit, open and closed ...... 92 Pump, nitrogen ...... 120 DRU ...... 93, 101 MFLC-GS ...... 120 Circulation ...... 92 Pump, non-clogging ...... 130, 131 GSO-D ...... 67, 71 MFLCT80 ...... 40, 41 Circulation systems ...... 93 Pump, pipeline ...... 114 GSS ...... 67, 74, 121, 119 MFLW80...... 121, 129 Clamping set ...... 90, 142 Pump, plastic centrifugal ...... 119 H127G115 ...... 44 MFLW85S20 ...... 120 Coal feed screw ...... 117 Pump, pot ...... 120 H12N ...... 44 MFLWT80 40, 41 , 120, 121, 122, 141 Coal gasification ...... 117 Pump, pulp ...... 129 H17GN ...... 44, 123 MG/M3 ...... 130 Coal mining ...... 116 Pump, quench oil ...... 121 H427GS1/35 ...... 116 MG1 .36, 37,123, 124, 130, 131, 133 Code for agitator seals ...... 90 Pump, raw sludge ...... 130 H74(F)-D . . . 48, 49, 118, 124, 127 MG12 ...... 36 Code system EN 12756 (DIN 24960) ...... 136 Pump, refill hand ...... 102 H74F ...... 140 MG13 ...... 37 Coefficient of friction ...... 138 Pump, residual oil ...... 121 H74F1 ...... 125 MG1-45/G6 ...... 119 Coking oven gas compressor ...... 115 Pump, return ...... 120 H74G15 ...... 125 MG1-G6 ...... 133 Compressors ...... 76, 77, 115 Pump, screw ...... 105, 112, 119, 121, 132 H75 ...... 47, 112, 122, 124 MG1S20 ...... 37 Concentricity tolerance ...... 141 Pump, standard centrifugal ...... 119 H75-D ...... 112 MG1S5 ...... 129 Condensate generation ...... 99 Pump, standard chemical ...... 118 H75F ...... 47, 124 MG9...... 34 Conical spring ...... 142 Pump, submersible-motor ...... 131 H75G115 ...... 124 MR..(L)-D ...... 86 Contact unit ...... 103 Pump, sulfolan ...... 121 H75G15 ...... 46 MR33(L)-D ...... 87, 134 Cooling coil ...... 96 Pump, washing suspension, centrifugal ...... 127 H75K ...... 69 MR33S1-D ...... 134 Cooling flange ...... 90 Pump, water injection ...... 113, 114 H75K/H75F ...... 122 MR5LF-D ...... 87 Cooling water consumption ...... 138 Pumping screw ...... 49, 60, 140 H75N ...... 46 MR-D ...... 86, 133 Cutter head seal ...... 116 Quarrying ...... 116 H75N/H75F1 ...... 127 MRF-D17/65 ...... 119 Cyclone separator ...... 107 Quench (installation) ...... 5, 93 H75S2/H75F1 / F2 ...... 120 Mtex-QN,-TN,-QNM,-TNM,-DN 58, 59 DIN ISO 5199 ...... 95 Quench fluid tank ...... 94 H75S2/U5-H75F2/55 ...... 122 Mtex-GSD ...... 72 Distributor unit ...... 110 Radial clearance seal ...... 76, 79 H75VN ...... 47, 69 PDGS ...... 78, 115 Double balanced ...... 55, 57, 59 Refill unit, automatic ...... 104 H76(N) ...... 46, 47 QFT1000 ...... 94, 95, 127 Drive key ...... 142 Refill unit, mobile ...... 121 H7F ...... 47, 124 RGS-D1/143 ...... 121 Elastomer bellows ...... 34, 36 Refiner ...... 128 H7(N) ...... 46, 124, 139 RMG12 ...... 37 Elastomer-free mechanical seal ...... 72, 78 Refinery ...... 120 H7N/H7F3 ...... 120 S14/48 ...... 116 External pressurization ...... 139 Residue combustion ...... 118 H7N/H7N ...... 32, 48 S2/245 ...... 116 Extrusion ...... 141 Roller bellows ...... 39 H7S2 ...... 125 Bulk head 3200 ...... 132 Filter dryer ...... 134 Roller head sea ...... 116 H8 ...... 64 SH ...... 60, 61, 112, 113, 114 Flash turbines ...... 115 Rotary joint for water ...... 116 H10 ...... 64 SH-D ...... 61, 112 Flow metex ...... 102 Roughness ...... 138 HF(V) ...... 124 SHF ...... 60, 124, 126 Flue gas desulphurization ...... 127 Safety seal ...... 69 HF-D/93 ...... 114 SHFV3/125 ...... 126 Fluid quench ...... 92 Screw agitator ...... 133 HFV-D4/120 ...... 113 SHFV-D ...... 60, 121 Flushing ...... 92 Screw compressor ...... 115 HGH ...... 50, 51, 123, 132 SHJ92GS4 ...... 134 Gap width ...... 138 Screw locking ...... 141 HJ42 ...... 43 SHJ97(7)G ...... 43, 134 Gas groove shapes ...... 66 Seal supply system ...... 92 HJ927GN ...... 42 SHPV ...... 60, 126 Gas quench ...... 92 Sealing system with no cooling ...... 125 HJ92N ...... 42 SHR ...... 52 Gas separation ...... 68 Seat cooling ...... 124, 125 HJ977GN ...... 42, 129, 130, 133 SHV ...... 112, 126, 127 Gas supply system ...... 60, 63, 66, 67, 74, 79, 121, 144 Seat locking to EN 12756 (DIN 24960) ...... 137 HJ97G ...... 42 SHV-D ...... 112 Glass lined vessels ...... 84 Seat, hydraulically balanced ...... 89 HPS ...... 93, 105 SMS ...... 79 Guide sleeve ...... 55 Seats ...... 27, 28, 36, 40, 46 HR . . . . 52, 53, 127, 128, 129, 130 SP 23 ...... 93, 102 Heat dissipation ...... 138 Seawater desalination ...... 123 HRC ...... 54, 55, 118 SPA ...... 93, 109, 117, 121 Heat exchanger ...... 105, 106, 107 Sewage works ...... 130 HRC-GS3000N ...... 54, 67, 118 SPI ...... 93, 103 Hot water ...... 124 Shipping ...... 132 HRGS-D ...... 73 SPK ...... 93, 103 Installation instructions ...... 141 Shrink disk ...... 90, 142 HRGS-DC ...... 73 SPL ...... 93, 103 Jacket cooling ...... 125 Shut-down seal ...... 90 HRGS-DD ...... 73 SPN . . . . 93, 102, 104, 114, 117 Leakage ...... 139 Siding pressure ...... 138 HRK-D ...... 53 SPS ...... 93, 94, 103 Leakage drain ...... 90 Sliding velocity ...... 138 HRLS1/80 ...... 127 SPU ...... 93, 102 Level indicator, switch ...... 103 Snap locator ...... 142 HRN ...... 62 STD1 ...... 90 Load factor ...... 138 Soiled and sea water ...... 112 HRSV-D201/254 ...... 116 Stern tube seal 4600 ...... 132 Low-emission seal ...... 47 Special waste incineration ...... 130 HRZ/MG1 ...... 133 TDGS ...... 78 Magnet filter ...... 108 Split mechanical seal ...... 50, 123 HRZ1 ...... 52 TS1000/1016 ...... 93, 96 Metal bellows ...... 40, 58, 63, 72, 78 Spring protection sleeve ...... 54 HS...(L)-D ...... 88, 139 TS2000/2001/2063 . . . 93, 97, 119 Mineral oil ...... 112, 114 Spring, product-protected ...... 42 HSH(V)(L)-D ...... 89 TS3000/3004/3007/3016 . . . 93, 99 Multiphase technology ...... 112 Spring, Super-Sinus ...... 139 HSH2/215 ...... 115 TS6050 ...... 93, 100 Multipoint injection ...... 58, 114 Steam quench ...... 92 HSH-D ...... 89, 117, 128 VGM ...... 123 Offshore ...... 112 Sterile process ...... 43, 52, 88, 99, 134 HSHF1 ...... 121, 124 VTE ...... 93, 110 Oil-lubricated mechanical seals ...... 61, 115 Submersible aerator ...... 130 HSHFB ...... 126 WDK ...... 93, 105 Onshore ...... 114 Submersible motor agitator ...... 131 HSHLU-D ...... 89, 117 WED ...... 93, 127, 106 Paper industry ...... 128 Sugar industry ...... 133 HSHU-D ...... 89, 119 WEL ...... 93, 106 Pipeline ...... 114, 123 Supply connections ...... 90 HSHV ...... 123 ZY ...... 93, 107, 123 Polymerization buffer ...... 90 Surface finish ...... 141 HSMR..(L)-D ...... 86, 134 Polypropylene reactor ...... 119 Swimming-pool ...... 123 HSSHRS8-D ...... 128 Power consumption ...... 138 Symbols ...... 136 HST1/119-TA2 ...... 113 Power consumption due to friction ...... 139 Table of materials ...... Back cover flap HTS ...... 125 Power stations ...... 60, 126, 127 Tandem arrangement ...... 127, 131 LP(-D) ...... 129 Pressure booster ...... 101 Tank agitator ...... 127 M2N ...... 27 Pressure gauge ...... 102, 103 Thermosiphon vessel, system ...... 96, 97, 98, 99, 100 M3 ...... 134 Pressure retention unit, control unit ...... 110 Threaded pin ...... 142 M32 ...... 28, 132 Pressure vessel regulations ...... 142 Top entry drive ...... 82, 84, 88, 89 M37...... 28, 29 Pulp ...... 128 Torque transmission, drive ...... 46, 90, 142 M3N ...... 28 Pulper ...... 129 TTV O-rings ...... 142 M3S ...... 28 Pulpwood grinder ...... 128 Turbo compressor ...... 115 M451 ...... 82 Pump, ammonia ...... 119 Turbulence losses ...... 138 M461 ...... 84 Pump, aseptic ...... 134 Turbulent mixing reactor ...... 119 M481 ...... 82, 83 Pump, boiler water circulating ...... 60, 126 Vapour pressure curves ...... 140 M48-D ...... 139 Pump, boiler water feed (booster) ...... 60, 126 Venting ...... 141 M56K(L)-D ...... 84 Pump, condensate ...... 126 Viscosity ...... 142 M7 ...... 32, 124, 139 Pump, cooling water ...... 132 Waste water systems ...... 130, 131 M74 ...... 30, 132 Pump, crude oil loading ...... 114 M74-D ...... 32 Pump, dishwasher ...... 38 M74F(-D) ...... 31 , 33 Pump, drinking water ...... 123 M74...... 31, 123 Pump, eccentric screw ...... 119
2 Burgmann Mechanical Seals Design Manual 15.3 Media
Media 3 Seal Selection by Media
Burgmann Mechanical Seals Design Manual 15.3 3 Seal selection by Media Seal selection and mate- Column 3: rial recommendation by Concentration media. – = The media normally occurs in pure form and (as in the case of gases and Single mechanical seal arrangement The recommendations in the media ta- other media requiring a double mechani- bles on pages 7 to 24 are based on the cal seal) – the concentration has no bear- “typical case“ of a seal for a horizontal ing on the mechanical seal selection. Inboard seal Outboard seal Inboard seal Outboard seal Inboard seal Outboard seal centrifugal pump. Other types of machine, <10 = concentration less than 10% installation conditions, modes of opera- by weight. tion, designer’s, manufacturer’s and ope- rator’s specifications, local regulations 10 = The designation in column 1 is and so on can result in a different choice the common name for approximately Double mechanical seal arrangements of mechanical seal. 10% aqueous solution. For complex sealing duties it is always Optional Quench F10 = A solids content of up 10% by Optional Quench Optional Quench Seal advisable for the user to consult with our weight. Seal Seal specialist engineer. L = Solution of defined composition Explanations to columns 1 to 16:
4 Burgmann Mechanical Seals Design Manual 15.3 Column 7: Column 9: C2 = “Substances clearly proven so 2 = Corrosion Additional measures Materials of construction far in animal experiments only ... of The medium attacks all standard metals. causing cancer ...“ Mechanical seals with no metal parts on D = Steam quench for inboard mechanical seals. product side must therefore be used. For an explanation of the material codes C3 = “Substances whose cancer-caus- (H), H = Heating (where necessary) and their indices, consult the material key ing potential is suspected for good rea- 3 = Exclusion of air of the seal housing, seal cover, buffer (inside the back cover of this manual). son“ If the medium contacts or mixes with the medium G = Toxic. Together with air, atmosphere, it forms an explosive or kD = Conical stuffing box Column 10: the medium forms gases, va- reacts with a damaging effect on the
Hazard warnings and reasons pours or dusts capable of environment, the medium itself and the Media SS = Splash guard necessary. Leakage causing acute or chronic health disorders machine and mechanical seal. pipe-away recommended. for recommending a double or death. mechanical seal or quench. 4 = Lubricating properties SW = Regular replacement of buffer Under normal conditions, the medium has H = Skin resorption. “With many indus- medium necessary. Alternative is a When compiling these seal selections such poor lubricity that a single mechani- trial materials, skinresorption of subs- constant throughflow of buffer medium and material recommendations, it was cal seal is at risk from dry running. (arrangement 09). generally assumed that the machine in tances capable of penetrating the skin with ease constitutes a far greater risk of 5 = Icing QW = Regular replacement of quench question is located in a sheltered building frequented occasionally or continually by poisoning than inhalation. Skin contact, Normally the medium is conveyed at medium necessary. An alternative is a e.g. with aniline, nitrobenzene, phenol temperature below 0 °C. Without auxi- constant through flow of quench me- persons coming into contact with liquid or vapour leakage of medium from all types and many other substances, can give rise liary equipment, the proper functioning dium (arrangement 09); approximately to potentially fatal poisoning, often wi- of a single mechanical seal is at risk 0.25 l/min is recommended. of sealing points. As such, considerations of health and environmental protection thout warning symptoms.“ from freezing atmospheric moisture. ThE = Thermal buffer had a strong bearing on the choice of 6 = Leakage R seal category. = Irritant. Substances Absorbed and/or flushed away by the Column 8: “Health hazard“ and “Ignition/Explosion“ which – without being toxic quench, or prevented by a double – can cause inflammation Mechanical seal type can lose much of their significance if the mechanical seal necessary. machine is installed in the open or in through prolonged or repetitive direct In the case of double or tandem mechani- areas rarely frequented by people and contact with the skin, mucous membra- 7 = The medium is easily cal seals, the recommendation applies to ringed with warning signs. If no mention ne or eyes. ignited the mechanical seal inboard. The choice is made to either of the reasons 1 to 5 for S = Sensitization. “After sensitization, of the outboard seal is dictated by the recommending a double mechanical seal e.g. of the skin or respiratory tracts, al- 8 = The medium is buffer/-quench medium. or a single mechanical seal with quench, lergic reactions can be triggered at vary- flammable 1 = Mechanical seal having O-ring se- it is acceptable to use a single mechani- ing speed and in varying intensity depen- condary seals; unbalanced or balanced; cal seal. ding on a person’s disposition. Reactions rotating spring in contact with the pro- of this type cannot be prevented with cer- 9 = The medium is poten duct, e.g. M3N, M7N, H7N The decision in favour of a single me- tainty, even when the threshold limit va- tially explosive chanical seal must be taken by the user lues are observed.“ 2 = Mechanical seal having O-ring of the machine or the contractor. As he is secondary seals; unbalanced or balan- the only one to know all conditions and X = Hazardous to health ced; rotating springs not in contact with regulations relating to the process and to (moderately toxic) (Hazard symbols taken from the German the product, e.g. HJ ... assess the risks. regulation concerning hazardous mate- 3 = Mechanical seal having O-ring rials (GefStoffV) published on 26 August secondary seals; unbalanced or balan- Letters in column 10: Technical grounds and environ- 1986, Federal Law Gazette I, page 1470). ced; stationary springs not in contact Health hazard warnings mental protection 0 = Insufficient information with the product, e.g. HR ... A = Corrosive. In its liquid, 1 = Vapour pressure/gas The medium designation is imprecise or vapour or gas form, the me- 4 = Same as 3 but no metal parts in At normal working temperatures, the the available information on the medium dium attacks the skin, eyes the product; e.g. HR31/dH – G9 medium has a vapour pressure of >1 is insufficient to assess the serviceability or mucous membrane. 5 = Mechanical seal with elastomer bar. If the working temperature lies be- of a single mechanical seal. Please notify bellows; bellows as, MG... C = Carcinogenic. The carcinogens low boiling point (column 15) or if the us of your experiences. are classified in: sealing pressure lies clearly above the 6 = Mechanical seal with metal bel- vapour pressure, a single mechanical C1 = “Substances known by experience lows; such as, MFL seal may be used with consideration of to be capable of causing cancer in hu- X the duty details. = Special design e.g. a modified MR-D mans“
Burgmann Mechanical Seals Design Manual 15.3 5 Seal selection by Media Column 11: Column 12: l = soluble Column 15: TLV Normal condition = soluble in 10–30 parts water Boiling point of the pure medium at 20 °C and 1.013 The values quoted in ml/m3 = ppm w l= of low solubility Boiling point of the medium in °C un- bar: (parts per million) are taken from Bulle- = soluble in 30–100 parts water der normal pressure (1.013 bar). Differ- tin 30 published by the SenateCommis- ga = gaseous sl = of very low solubility ent reference pressures are marked. If sion for Testing Hazardous Materials on fe = solid; no further details available = soluble in 100–1000 parts the working temperature is close to or 1st September 1994: “Threshold Limit = water above boiling point, the seal selection Values and Biological Material Toler- fl = liquid and material recommendation must be ances 1994“. ssl = of extremely low solubility checked. kr = crystalline = soluble in 1000–10000 parts Additional symbols: pa = viscous = water Additional signs: 3 unl = virtually insoluble mg: TLVs are quoted in mg/m instead This column contains the following A ...: The azeotrope boils at ... °C of ppm = soluble in more than 10000 notes on aspects of sealing: = parts water Z ...: Decomposition at ... °C #, e.g. # 0.5 for barium ...: 0.5 mg/m3, ga requires a double mechanical seal (...): Reference pressure in mbar calculated as Ba in most cases. If the pressure to be Substances of low solubility (wl) If there is an additional %-figure, the * “According to the current level of sealed lies distinctly above the vapour to virtual insolubility (unl in water are quoted temperature applies to the ... % knowledge, the action of this substance pressure at working temperature, a sin- dissolved in other solvents (mostly aqueous solution. constitutes a distinct carcinogenic ha- gle mechanical seal with or without hydrocarbons), unless they have to be quench can be used under certain cir- sealed aqueous suspension. In these zard for humans. No concentration va- Column 16: lues are given for this substance in the cumstances. cases, the solvent (“carrier liquid“) list because it is still impossible to quo- must be given due consideration in the Density fl indicates the use of single mechani- choice of mechanical seal and material. te any concentration as being safe. For media that are liquid or solid under cal seal, but other influencing factors For the media marked in column 12 With some of these substances, there normal conditions, the density is quoted such as the working temperature (va- with ga, it is assumed that the pure me- is even a great risk from absorption – where known – in g/cm3 at 20 °C. pour pressure at pumping temperature, dium is pumped in gas or liquid form. through healthy skin. If the use of such Different reference temperatures are in- health hazard, risk of explosion or cor- The working fluid influences the choice substances is unavoidable for technical dicated. rosion can necessitate a tandem or of mechanical seal for sealing liquid- reasons, special safety and monitoring For gases there is only an indication double mechanical seal. ring vacuum pumps or compressors. measures must be taken.“ whether they are heavier than air (+) fe, kr indicates that the medium must or lighter than air (–). This is also a The seal selection takes account of be molten (e.g. sulphur, DMT), dissol- Column 14: the TLV as follows: pointer to their behaviour in the event ved (e.g. salts) or suspended (e.g. li- Melting point of leakage: sinking, rising or self-dissol- TLV <5 ppm or *: Use of a double mestone or gypsum in water), otherwi- (= Fusion point F) in °C ving. mechanical seal is generally recom- se it cannot be pumped or stirred. If there are unequal values for the soli- mended, but see paragraphs 2 + 3 of Additional signs: the introductory note on column 10. Column 13: difying point (setting temperature) and the melting point (liquefying temperatu- (...): Reference temperature in °C TLV 5, 25 ppm: A double me- Solubility in water re), or different values or modifications, A chanical seal or a single mechanical For solids (kr or fe in column 12), the the higher value is always quoted. For ...: The quote density applies to the seal with quench is recommended. If solution equilibrium is quoted in weight some mixtures of media, solidification azeotrope at ... % weight. column 10 contains no further grounds per cent of the aqueous solution at ranges or pour points are quoted. With ... %: Density of ... % aqueous solution other than “health hazard“ for choosing 20 °C, in those cases where the eva- fusion points above room temperature a tandem or double mechanical seal, a luated literature specifies data. Differ- and/or working temperatures close to single mechanical seal can be used, ent reference temperatures are stated. fusion point, it is necessary to check provided other measures rule out all For example: 11 (25) means: The satu- (with due consideration of the other risks to humans. rated aqueous solution contains 11% operating conditions such as intermit- weight of the dissolved substance at tent mode, full stand-by pump) whether 25 °C. Solubility usually increases with the machine or at least the seal hou- rising temperature. sing requires heating. Other specifications and additional signs: Additional signs: – following the %-figure: Solubility de- K ...: Crystallisation at temperatures creases with rising temperature. below ... °C ++ following the %-figure: Solubility is S ...: Sublimation at ... °C more than double at 80 °C If there is an additional %-figure, the sll = of very high solubility quoted temperature applies to the ... % = soluble in less than 1 part water aqueous solution. ll = of high solubility = soluble in 1–10 parts water
6 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3
Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping
Addit. measures
Concentration % on page 1. Normal condition
Spring
Others
Sec. seal
Seal face
Stat. face 12 3 40 5 6 7 8 10 1 1 12 1 300 1 4 15 16 A
Media Acetaldehyde (Ethanal) CH3CHO – 100 D111 1SBM2 G G C3,1,3,7 50 fl –124 21 0,78 Acetates → Acetic acid esters Acetic acid: – Burgmann Mechanical Seals Design Manual 15.3 7 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Amino sulfonic acids S – TG D1 11 1 V B M1 GG O Ammonia NH3 – <40 D1 11 1 S B E G G G,R,1 50 ga –78 –33 (–) Ammonia aqu. solutions: NH4OH Caustic ammonia NH4OH ~29 B Barium chloride BaCl2 8 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 Benzyl butyl phalate (BBP) → Phthalic acid esters C19H20O4 Media Biphenyl C12H10 –>75 Burgmann Mechanical Seals Design Manual 15.3 9 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Calcium carbonate → Lime powder suspension Calcium chlorate Ca(ClO3)2 10 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 Citric acid C6H8O7 Citrus juices N – D Decahydronaphthalene → Decalin Decalin (decahydronaphthalene): C10H18 cis-Decalin C10H18 – Burgmann Mechanical Seals Design Manual 15.3 11 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Dibutyl phthalate (DBP) → Phthalic acid esters Dichlorobenzenes: 1,2-Dichlorobenzene (ortho-dichlorobenzene) C6H4Cl2 – 12 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend seeinside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 E Edible oil N – <100 S1 02 1 S B V G G fl Media Egg flip N – Burgmann Mechanical Seals Design Manual 15.3 13 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Formamide CH3NO – <60 S1 02 1 S B E G G fl 3 2210 1,13 Formic acid HCOOH 100 TG D1 11 SW 1 V B M2 G G A,2 5 fl 100%8 100%101 100%1,22 Formic acid ethyl esters (ethyl formiate) C5H10 O2 – 14 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 Hexachloroethane (perchloroethane) C2Cl6 Burgmann Mechanical Seals Design Manual 15.3 15 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5 6 7 8 10 11 12 1300 14 15 16 L Lacquer solvents S – 16 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 MDEA → N-Methyl-2,2'-imino diethanole C5H13NO2 Media MEA → N-Methyl ethanolamine C3H9NO Meat juice, meat broth N – <60 S1 02 1 S B V G G fl MEK → Butanone Melamine resins S – <100 D1 11 1 V B M G G 3,4 fl Mercaptanes → Thiols Mercuric chlorides: Mercuric chloride HgCl2 N Naphtha G – Burgmann Mechanical Seals Design Manual 15.3 17 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5 6 7 8 10 1 1 12 1 300 1 4 15 16 Naphthol dyes 18 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 Perchlorobenzene → Hexachlorobenzene Media Perchloroethane → Hexachloroethane Perchloroethylene → Tetrachloroethylene Perhydrol ± → Hydrogen peroxide, 30-% solution Petrol (gasoline, gas) unleaded, regular and supergrade G – <40 S1 02 1 S B V G G 7 fl 40...200 0,72...0,76 Petrol ether → Petrol, Gasoline Petrolatum G Sch <160 S1 02 1 S B V G G pa 38...60 >300 0,82...0,88 Petroleum G – <160 S1 02 1 S B V G G fl 150...280 Petrol-methanol mixture G – <40 S1 02 1 S B M1 GG 7 fl Phenol (carbolic acid) C6H5OH Sch Burgmann Mechanical Seals Design Manual 15.3 19 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 14 15 16 Potassium chloride KCl Q Quenching oil G – <200 S1 08a 1 Q1 Q1 M1 GG fl R Rapeseed oil → Colza oil Raw juice → Sugar juices ‘Refrigerant oil’ saturated with R... G – <100 S1 02 1 Q1 AM4 GG fl Refrigerants, DIN 8962 R 12B2 – <25 S1 02 1 Q1 AM1 G G 100 fl –141 23 2,215 R 14 – >–40 D1 11 1 S B M4 G G 1,4 ga –184 –128 (+) R 21 – >–40 D1 11 1 S B M4 GG X,1,4 10ga –135 9 (+) R 22 CHClF2 – >–40 D1 11 1 S B M4 G G 1,4 500 ga –160 –41 (+) R 23 – >–40 D1 11 1 S B M4 G G 1,4 ga –155 –82 (+) R 32 – >–40 D1 11 1 S B M4 G G 1,4 ga –136 –52 (+) R 116 – >–40 D1 11 1 S B M4 G G 1,4 ga –101 –78 (+) R 133a – >–40 D1 11 1 S B M4 GG 1,4 ga –101 6 (+) R 142b – >–40 D1 11 1 S B M4 G G 1,4 1000 ga –131 –10 (+) R 143 – >–40 D1 11 1 S B M4 GG 1,4 ga –111 –47 (+) R 152a F2HCCH3 – >–40 D1 11 1 S B M4 G G 1,4 ga –117 –25 (+) R 218 – >–40 D1 11 1 S B M4 GG 1,4 ga –183 –37 (+) R 610 – >–40 D1 11 1 S B M4 GG 1,4 ga –2 (+) 20 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 R 1112a – <20 S1 02 1 Q1 AM4 G G fl –127 20 1,555 Media – >20D111 1SBM4 GG 1,4 R 1113 – >–40 D1 11 1 S B M4 G G 1,4 ga –158 –28 (+) R 1122 – >–40 D1 11 1 S B M4 GG 1,4 ga –138 –18 (+) R 1132a – >–40 D1 11 1 S B M4 G G C3,1,4 ga –144 –86 (+) RC 318 – <–40 D1 11 1 S B M4 GG 1,4 ga –41 –6 (+) Rinsing agent (industrial) – <100 S1 02 1 S B V G G <80 S102 1SBPGG S Saccharose (sugar) C12H22O11 Burgmann Mechanical Seals Design Manual 15.3 21 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Soiled water → Water Soot-water mixture <10 T Table vinegar → Acetic acid Tall oil fatty acids Sch <200 S1,Q3 10 1 Q1 AM1 MM 3 fe Sch >200 S1,Q3 10 6 A Q1 GM5 M3 Tall oil pitch Sch <150 S1,Q3 10 1 Q1 AM1 MG 3 fe Tall oil resin (acids) Sch <200 S1,Q3 10 1 Q1 AM1 MM 3 fe Sch >200 S1,Q3 10 6 A Q1 GM5 M3 Tall oil, crude Sch <120 S1,Q3 10 1 Q1 AM1 GG 3 pa Tallow Sch <100 S1 02 1 S B V G G fe 40...70 Tannery waste water, pH = 9 – 11 – <40 S1 02 1 V B V G G fl Tannic acids → Tannines Tannines (natural polyphenols) G 22 Burgmann Mechanical Seals Design Manual 15.3 Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 12 3 40 5 6 7 8 10 11 12 1300 14 15 16 Terphenyls (diphenyl benzenes): C18H14 m-Terphenyl (1,3-diphenyl benzene) C18H14 Sch <180 S1,Q3 10 (H) 1 S B M1 G G 3 kr 86...89 365 Media o-Terphenyl (1,2-diphenyl benzene) C18H14 Sch <180 S1,Q3 10 (H) 1 S B M1 G G 3 kr 57...58 332 p-Terphenyl (1,4-diphenyl benzene) C18H14 Sch U Urea (carbamide) CH4N2O V Varnish G – TG D111 1VBM1 GG 3,4 fl Vaseline → Petrolatum Vegetable oils G 0 <150 S1 02 1 S B V G G fl Vegetable paste – <100 S1 02 1 S B V G G pa Vinyl acetate → Acetic acid vinyl ester Vinyl acetylene (1-butene-3-in) C4H4 – <60D111 1VBM2 GG 1,3 ga 5 (+) Vinyl benzene → Styrene Burgmann Mechanical Seals Design Manual 15.3 23 Seal selection by Media Media Mechanical seal Additional information on the medium Code of Materials and Chemical Temp. Arrange- Materials to Hazard TLV- Solu- Melting Boiling Density legend see inside of Formula °C ment EN 12756 reference value bility temperature point g/cm3 Remark back cover. Seal type 1 2 3 4 5 ° C ° C Please observe the note Auxil. piping Addit. measures Concentration % on page 1. Normal condition Spring Others Sec. seal Seal face Stat. face 1 2 3 40 5678 10 1112 1300 1 4 15 16 Vinyl chloride C2H3Cl – <40D111 1VBM1 GG C1,1 * ga –160 –14 (+) Vinylidene chlorides → Dichloroethylenes Volatile oils S – W Walnut oil N – <100 S1 02 1 S B V G G fl ~0,92 Washing lye S – X Xanthogenates S <10 <60 D1 11 1 Q1 Q1 M2 GG 3,4 kr Xenone Xe – <40 D1 11 1 S B P G G 1 ga –112 –108 (+) Xylols (dimethyl benzenes): C8H10 technical xylol (mixture) C8H10 – <60 S1 02 1 S B M1 G G 7 100 fl 137...140 ~0,86 m-Xylol C8H10 – <60 S1 02 1 S B M1 G G 7 100 fl –48 139 0,866 o-Xylol C8H10 – <60 S1 02 1 S B M1 G G 7 100 fl –25 144 0,881 p-Xylol C8H10 – <60 S1 02 1 S B M1 G G 7 100 fl 13 138 0,861 Y Yeast paste N – <60 S1 02 1 S B V G G pa Yoghurt with fruit etc. N – <60 S1 02 5 Q1 Q1 VGG pa Yoghurt without fruit etc. N – <60 S1 02 1 Q1 BVGG pa Z Zapon lacquer – <60 D1 11 1 V B M1 GG 3,4 fl Zinc chloride ZnCl2 24 Burgmann Mechanical Seals Design Manual 15.3 StandardStandard Seals 25 Mechanical Seals for Pumps and Compressors Plain shafts, rotating spring, unbalanced M2N ...... 27 M3N ...... 28/29 M7N ...... 30/31 M74-D ...... 32/33 MG9 ...... 34/35 MG1 ...... 36/37 MF95N ...... 39 Plain shafts, rotating spring, balanced MFL85N ...... 40/41 HJ92N ...... 42/43 Stepped shafts, rotating spring, balanced H12N ...... 44/45 H7N ...... 46/47 H74-D ...... 48/49 Stationary spring, balanced HR ...... 52/53 HRC..N ...... 54/55 Cartex ...... 56/57 Mtex ...... 58/59 SH ...... 60 SH (-D) ...... 61 HRN ...... 62 MFL65 ...... 63 H10/H8 ...... 64 Split seal HGH ...... 50/51 Burgmann Mechanical Seals Design Manual 15.3 25 Welcome to our sealing world www.burgmann.com You never used to know that Everything a mechanical seal was damaged until you saw its leakage, which was usually too late. Today, permanent under control seal monitoring by the Burg- mann MDS guards against unwelcome surpri- ses. Because you always know the seal’s current around the clock: state of performance. A simple warning system – plus automatic deactivation of the pump if required – Seal diagnosis provides additional safety. in pumps 26 Burgmann Konstruktionsmappe 15.3 For plain shafts, spring rotating M2N M2N 1) l3 valid for M2N, 1) for M2 series l21 is valid (see table) Single seal M2N Stationary seats Unbalanced Item Part no. Description Conical spring no. to DIN Dependent 24250 G4 on direction of rotation 1.1 472 Seal face 1.2 412.1 O-ring To EN 12756* 1.3 474 Thrust ring The M2 mechanical seal range features 1.4 478 Righthand spring a spring loaded solid carbon graphite seal 1.4 479 Lefthand spring face. They are cost effective for basic 2 475 Type G9 stationary seat applications such as circulating pumps 3 412.2 O-ring for water and heating systems. Seal designations Operating limits (see note on page 1) Stationary seats G6 Rotating unit G4 G6 G9 EN 12756 d1 = 6 ... 38 mmm0.25" ... 1.5" p1 = 10 bar 145 PSI M2 M2 M2N4 M2N t = –20 ... 180 °C m–4 °F ... 355 °F vg = 15 m/s 50 ft/s Materials (to EN 12756) Axial movement: 1.0 mm Seal face: B Unquoted dimensions as per Item 2 Stationary seats G4: Q1; S (Q1; V) G6: Q1; S (Q1; V) G9: Q1; Q2; S; V d1f d3 d6 d7 d8 d11 d12 db l1N l3 l5f l6 l7f l8m l9m l10 l12 l l14 l15 l16 l21 l28 b Rn 6* 15 – – – 11.8 16.0 8 – – – – – – – – 6.5* 5.6 1.2 3.8 10.9 – – 1.2 8* 18 – – – 15.5 19.2 11 – – – – – – – – 8.0* 7.0 1.2 3.8 15.5 – – 1.2 10* 20 17 21 3 15.5 19.2 13 40 17.5 1.5 4 8.5 17.5 10.0 7.5 7.5* 6.6 1.2 3.8 15.9 6.6 8 1.2 12* 22 19 23 3 17.5 21.6 16 40 17.5 1.5 4 8.5 17.5 10.0 7.5 8.0* 7.0* 1.2 3.8 16.0 6.6 8 1.2 14* 25 21 25 3 20.5 24.6 18 40 17.5 1.5 4 8.5 17.5 10.0 7.5 8.0* 7.0* 1.2 3.8 16.0 6.6 8 1.2 15* 27 – – – 20.5 24.6 19 – – – – – – – – 7.5* 6.6 1.2 3.8 17.4 – – 1.2 16* 27 23 27 3 22.0 28.0 21 40 19.5 1.5 4 8.5 17.5 10.0 7.5 8.5* 7.5 1.5 5.0 19.0 6.6 8 1.5 18* 30 27 33 3 24.0 30.0 23 45 20.5 2.0 5 9.0 19.5 11.5 8.5 9.0* 8.0 1.5 5.0 20.5 7.5 8 1.5 20* 32 29 35 3 29.5 35.0 26 45 22.0 2.0 5 9.0 19.5 11.5 8.5 8.5* 7.5 1.5 5.0 22.0 7.5 8 1.5 22* 35 31 37 3 29.5 35.0 28 45 23.5 2.0 5 9.0 19.5 11.5 8.5 8.5* 7.5 1.5 5.0 23.5 7.5 8 1.5 24* 38 33 39 3 32.0 38.0 30 50 25.0 2.0 5 9.0 19.5 11.5 8.5 8.5* 7.5 1.5 5.0 25.0 7.5 8 1.5 25* 40 34 40 3 32.0 38.0 31 50 26.5 2.0 5 9.0 19.5 11.5 8.5 8.5* 7.5 1.5 5.0 26.5 7.5 8 1.5 26* 41 – – – 34.0 40.0 32 – – – – – – – – 9.0* 8.0 1.5 5.0 26.5 – – 1.5 28* 43 37 43 3 36.0 42.0 35 50 26.5 2.0 5 9.0 19.5 11.5 8.5 10.0* 9.0 1.5 5.0 26.5 7.5 8 1.5 30* 47 – – – 39.2 45.0 37 – – – – – – – – 11.5* 10.5 1.5 5.0 25.0 – – 1.5 32* 48 – – – 42.2 48.0 39 – – – – – – – – 13.0* 10.5 1.5 5.0 28.5 – – 1.5 35* 53 – – – 46.2 52.0 43 – – – – – – – – 13.5* 11.0 1.5 5.0 28.5 – – 1.5 38* 56 – – – 49.2 55.0 47 – – – – – – – – 13.0* 10.3 1.5 5.0 32.0 – – 1.5 *) Installation length differs from G4-seats Burgmann Mechanical Seals Design Manual 15.3 27 For plain shafts, spring rotating M3N l 22 13 d M32 Item no’s and descriptions as for type M3N, but with the seal face (carbon) shrink-fitted into the seal face carrier (Item no. 1.1). 1) l3 valid for M3...N-types 1) for M3-series l21 is valid (see table). Single seal M3N Stationary seats Unbalanced Item Part no. Description Conical spring no. to DIN Dependent 24250 on direction of rotation 1.1 472 Seal face 1.2 412.1 O-ring – G4 To EN 12756* 1.3 474 Thrust ring The M3 mechanical seals are immensely 1.4 478 Righthand spring popular. Extremely rugged and reliable, 1.4 479 Lefthand spring they cover a wide spectrum of applica- 2 475 Type G9 stationary seat tions – in water pumps, sewage pumps, 3 412.2 O-ring submerged pumps, chemical pumps, etc. – G13 Operating limits (see note on page 1) d1 = 6 ... 80 mm m0.25" ... 3.125" (M37G from d1 = 16 mm / M37 up to d1 = 55 mm) p1 = 10 bar m145 PSI t = –20 ... 180 °C m–4 °F... 355 °F (M37 up to 120 °C) – G6 (G30) vg = 10 (15) m/s m33 (50) ft/s EN 12756 Axial movement: 1.0 mm Combination of materials and seal types Gleit-Rotating Stationary seats ringeunit G4 G13 G63) G9 (seal SVQ A;B S V Q A;B V Q – G9 face) 2 1 1 (Q2)(Q2) EN M3 (S) – – – M3 – – – M3N – – 12756 M32 (A;B) M32 M32 M32 – M32N4 M32N4 M32N4 – M32N M32N M37 (U1) – – M37 M37 – – M37N4 M37N – M37N M37G – – M37G M37G – – M37GN4 M37GN – M37GN (Q12; Q22; U22) Unquoted dimensions as for Item 2. 3) Stationary seat G6 is also available in materials A and B (as style G30) (longer overall length than G6!). All material designations according to EN 12756. See back cover. 28 Burgmann Mechanical Seals Design Manual 15.3 l23 13 d M37 M37G (d max. 55 mm) (d min. 16 mm) 1 1 M3N Item no’s and descriptions as for type Item no’s and descriptions as for type M3N, but with the seal face brazed M3N, but with the seal face shrink- (tungsten carbide) to the seal face carrier fitted (silicon carbide) into the seal face (Item no. 1.1). housing (Item no. 1.1). 1) 2) d1 d3 d6 d7 d8 d11 1) d12 d13 db l1N l3m l5f l6 l7f l8n l9m l10 l11f l12 l13 l14 l15 l16 l21f l22n l23s l28 b Rf 6* 14 – – – 11.5 16.0 16 8 – – – – – – – – 9.0 6.5 7.1 5.6 1.2 3.8 10.5 11.9 – – – 1.2 8* 18 – – – 15.5 19.2 18 11 – – – – – – – – 9.0 8.0 7.1 7.0 1.2 3.8 15.5 16.9 – – – 1.2 10* 19 17 21 3 15.5 19.2 20 13 40 15.5 1.5 4 8.5 17.5 10.0 7.5 9.0 7.5 7.1 6.6 1.2 3.8 15.5 16.9 – 6.6 (8) 1.2 12* 21 19 23 3 17.5 21.6 22 16 40 16.0 1.5 4 8.5 17.5 10.0 7.5 10.0 6.5 7.6 5.6 1.2 3.8 15.5 17.4 – 6.6 (8) 1.2 14* 23 21 25 3 20.5 24.6 24 18 40 16.5 1.5 4 8.5 17.5 10.0 7.5 10.0 6.5 7.6 5.6 1.2 3.8 15.5 17.4 16.5 6.6 (8) 1.2 15* 24 – – – 20.5 24.6 25 19 – – – – – – – – 11.0 7.5 8.6 6.6 1.2 3.8 15.5 17.4 – – – 1.2 16* 26 23 27 3 22.0 28.0 26 21 40 18.0 1.5 4 8.5 17.5 10.0 7.5 11.5 8.5 9.0 7.5 1.5 5.0 17.5 19.5 16.5 6.6 (8) 1.5 18* 29 27 33 3 24.0 30.0 31 23 45 19.5 2.0 5 9.0 19.5 11.5 8.5 12.5 9.0 10.0 8.0 1.5 5.0 18.5 20.5 18.0 7.5 (8) 1.5 20* 31 29 35 3 29.5 35.0 34 26 45 22.0 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 20.0 22.0 19.0 7.5 (8) 1.5 22* 33 31 37 3 29.5 35.0 36 28 45 21.5 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 21.5 23.5 20.5 7.5 (8) 1.5 24* 35 33 39 3 32.0 38.0 38 30 50 23.5 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 23.0 25.0 22.0 7.5 (8) 1.5 25* 36 34 40 3 32.0 38.0 39 31 50 26.5 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 24.5 26.5 23.5 7.5 (8) 1.5 26* 37 – – – 34.0 40.0 40 32 – – – – 9.0 – – – 13.0 9.0 10.0 8.0 1.5 5.0 24.5 26.5 23.5 – – 1.5 28* 40 37 43 3 36.0 42.0 42 35 50 26.5 2.0 5 9.0 19.5 11.5 8.5 14.0 10.0 11.0 9.0 1.5 5.0 24.5 26.5 24.5 7.5 (8) 1.5 30* 43 39 45 3 39.2 45.0 44 37 50 26.5 2.0 5 9.0 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5.0 24.5 25.0 24.5 7.5 (8) 1.5 32* 46 42 48 3 42.2 48.0 46 39 55 28.5 2.0 5 9.0 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5.0 28.0 28.5 28.0 7.5 (8) 1.5 33* 47 42 48 3 – – 47 40 55 28.5 2.0 5 9.0 19.5 11.5 8.5 – 12.0 – – – – .– – – 7.5 (8) 1.5 35* 49 44 50 3 46.2 52.0 49 43 55 28.5 2.0 5 9.0 19.5 11.5 8.5 14.5 12.0 11.5 11.0 1.5 5.0 28.0 28.5 28.0 7.5 (8) 1.5 38* 53 49 56 4 49.2 55.0 54 45 55 33.5 2.0 6 9.0 22.0 14.0 10.0 14.5 11.3 11.5 10.3 1.5 5.0 31.0 32.2 31.0 9.0 7,5 1.5 40* 56 51 58 4 52.2 58.0 56 49 55 36.0 2.0 6 9.0 22.0 14.0 10.0 14.5 11.8 11.5 10.8 1.5 5.0 34.0 34.7 34.0 9.0 (8) 1.5 42* 59 – – – 53.3 62.0 58 52 – – – – 9.0 – – – 17.0 13.2 14.3 12.0 2.0 6.0 35.0 37.3 35.0 – – 2.5 43* 59 54 61 4 – – 59 52 60 38.5 2.0 6 9.0 22.0 14.0 10.0 – 13.2 – – 2.0 – .– – – 9.0 7,5 2.5 45* 61 56 63 4 55.3 64.0 61 55 60 39.5 2.0 6 9.0 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6.0 36.5 39.2 36.5 9.0 (8) 2.5 48* 64 59 66 4 59.7 68.4 64 58 60 46.0 2.0 6 9.0 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6.0 42.0 44.7 42.0 9.0 (8) 2.5 50* 66 62 70 4 60.8 69.3 66 61 60 45.0 2.5 6 9.0 23.0 15.0 10.5 17.0 12.8 14.3 11.6 2.0 6.0 43.0 45.7 43.0 9.5 (8) 2.5 53* 69 65 73 4 – – 69 64 70 47.0 2.5 6 9.0 23.0 15.0 12.0 – 13.5 – – – – .– – – 11.0 8,0 2.5 55* 71 67 75 4 66.5 75.4 71 66 70 49.0 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 47.0 49.0 47.0 11.0 (8) 2.5 58* 76 70 78 4 69.5 78.4 78 69 70 55.0 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 50.0 52.0 50.0 11.0 (8) 2.5 60* 78 72 80 4 71.5 80.4 79 71 70 55.0 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 51.0 55.0 51.0 11.0 (8) 2.5 63* 83 75 83 4 – – 83 74 70 55.0 2.5 6 9.0 23.0 15.0 12.0 – 14.2 – – – – .– – – 11.0 (8) 2.5 65* 84 77 85 4 76.5 85.4 85 77 80 55.0 2.5 6 9.0 23.0 15.0 12.0 18.0 14.2 15.3 13.0 2.0 6.0 52.0 54.3 52.0 11.0 (8) 2.5 68* 88 81 90 4 82.7 91.5 88 80 80 55.0 2.5 7 9.0 26.0 18.0 12.5 19.0 14.9 16.0 13.7 2.0 6.0 53.0 55.3 52.7 11.3 (8) 2.5 70* 90 83 92 4 83.0 92.0 90 83 80 57.0 2.5 7 9.0 26.0 18.0 12.5 18.0 14.2 15.3 13.0 2.0 6.0 54.0 56.3 54.0 11.3 (10 ) 2.5 75* 98 88 97 4 90.2 99.0 98 88 80 62.0 2.5 7 9.0 26.0 18.0 12.5 18.0 15.2 15.3 14.0 2.0 6.0 55.0 56.3 54.0 11.3 (10 ) 2.5 80* 100 95 105 4 95.2 104.0 103 93 90 61.8 3.0 7 9.0 26.2 18.2 13.0 19.0 16.2 16.3 15.0 2.0 6.0 58.0 59.3 58.0 12.0 10,0 2.5 1) Fitting dimensions d11 and d12 only apply to type M37G with D1 >16 mm 2) Dimensions in brackets lie either above or below L1N *) According to EN 12756 For the spring-loaded units the following measures apply: M3-series: I21; M32-series: I22; M37..-series: I23; M3..N-series: I3. Burgmann Mechanical Seals Design Manual 15.3 29 For plain shafts, spring(s) rotating M7N M74 Dimensions, item no’s and descriptions as for M7N, but with multiple springs (Item no. 1.5). Preferably for d1 >100 mm. 1) d1 > 100 mm : 30° 2) d1 > 100 : +0,1 3) d1 > 100 : H7 Single seal M7N Stationary seats Unbalanced (d1 = max. 100 mm) Independent of direction of rotation Item Part no. Description no. to DIN To EN 12756* 24250 – G4 The M7 mechanical seal range is de- 1.1 472 Seal face signed for universal application and ideal 1.2 485 Drive collar suited for standardisation. The loosely in- 1.3 474 Thrust ring serted seal faces are easily exchanged, 1.4 412.1 O-ring permitting all combinations of materials 1.5 477 Spring and stock rationalisation. With Super- 1.6 904 Set screw – G13 Sinus spring (see page 139). 2 475 Type G9 stationary seat 3 412.2 O-ring Operating limits (see note on page 1) d1 = 14 ... 200 mm m0.55” ... 8” Combination of materials p1 = 16 (25) bar m230 (360) PSI t = –50 ... 220 °C Stationary seals = –58 °F ... 430 °F Seal G4 G13mmmG9 G6 vg = 20 m/s m66 ft/s faces – G9 Axial movement: Q1 A;B A;B Q1 Q1 EN (Q )(Q)(Q) 12756 d1 up to 25 mm: 1.0 mm 2 2 2 (DIN d1 28 bis 63 mm: 1.5 mm S– –– 24960) d1 ab 65 mm and above: 2.0 mm V– –– Q1 Seal code explanation Q2 – G6 EN – d1 = 53 mm Only M78N: 12756 – Seal face made of cast Cr-steel (S) G9 (DIN – Type G13 stationary seat made of SVQ 24960) carbon graphite (B) 1 – Viton® O-rings (V) B Unquoted dimensions as for item no. 2 A – Metal parts including spring material Torque transmission Q1 –– 1.4571 (G) d1 >100 mm – Rotating unit M74 (Designations to EN 12756, see inside → M74/53–G13–SBVGG 4 set screws with cone points The basic description M74N/53 – SBVGG the back cover of this manual) 4 screws each (standard offset 90° indicates a G9 seat, installation dimen- arrangement). sions to EN 12756. 30 Burgmann Mechanical Seals Design Manual 15.3 Drive key d1 = 68: mx = M6 DIN 6885 M7F M7 S2 M78N d max. 100 mm d max. 100 mm d = 18 ... 100 mm 1 1 1 M7N t max. 180 °C M74F M74 S2 Items no’s, description and unspecified d1 = 14 ... 200 mm d1 = 28 ... 200 mm dimensions as for M7N. Design of the Dimensions, item no’s and descriptions Dimensions, item no’s and descriptions rotating portion especially for secondary as for type M7N, but with pumping as for type M7N, but with drive key. sealing element made of PTFE (T). screw. Dependent on direction of (without item no. 1.6) rotation! d1f d3 d6n d7n d8 d11 d12 d24 d31 ds l1Kl l3 l5i l6 l7i l8n l9n l10 l11i l12i l13i l14i l15 l16 l28 b fi f1f mx pmax. td 14* 25 21.0 25.0 3 20.5 24.6 16 – 34 35.0 25.0 1.5 4 8.5 17.5 10.0 7.5 10.0 6.5 7.6 5.6 1.2 3.8 6.6 4 6 – M5 10 1.5 16* 27 23.0 27.0 3 22.0 28.0 18 – 36 35.0 25.0 1.5 4 8.5 17.5 10.0 7.5 11.5 8.5 9.0 7.5 1.2 3.8 6.6 4 6 – M5 10 1.5 18* 33 27.0 33.0 3 24.0 30.0 20 32 38 37.5 26.0 2.0 5 9.0 19.5 11.5 8.5 12.5 9.0 10.0 8.0 1.5 5.0 7.5 5 7 3.5 M5 10 1.1 20* 35 29.0 35.0 3 29.5 35.0 22 34 40 37.5 26.0 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 7.5 5 7 3.5 M5 10 1.1 22* 37 31.0 37.0 3 29.5 35.0 24 36 42 37.5 26.0 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 7.5 6 7 3.5 M5 10 1.5 24* 39 33.0 39.0 3 32.0 38.0 26 38 44 40.0 28.5 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 7.5 6 8 3.5 M5 13 1.5 25* 40 34.0 40.0 3 32.0 38.0 27 39 45 40.0 28.5 2.0 5 9.0 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5.0 7.5 6 8 3.5 M5 13 1.5 28* 43 37.0 43.0 3 36.0 42.0 30 42 47 42.5 31.0 2.0 5 9.0 19.5 11.5 8.5 14.0 10.0 11.0 9.0 1.5 5.0 7.5 6 8 4.0 M6 13 1.5 30* 45 39.0 45.0 3 39.2 45.0 32 44 49 42.5 31.0 2.0 5 9.0 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5.0 7.5 6 8 4.0 M6 13 1.5 32* 47 42.0 48.0 3 42.2 48.0 34 46 51 42.5 31.0 2.0 5 9.0 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5.0 7.5 6 8 4.0 M6 13 1.5 33* 48 42.0 48.0 3 44.2 50.0 35 47 51 42.5 31.0 2.0 5 9.0 19.5 11.5 8.5 14.5 12.0 11.5 10.5 1.5 5.0 7.5 6 8 4.0 M6 13 1.5 35* 50 44.0 50.0 3 46.2 52.0 37 49 54 42.5 31.0 2.0 5 9.0 19.5 11.5 8.5 14.5 12.0 11.5 11.0 1.5 5.0 7.5 6 8 4.0 M6 13 1.5 38* 55 49.0 56.0 4 49.2 55.0 40 54 59 45.0 31.0 2.0 6 9.0 22.0 14.0 10.0 14.5 11.3 11.5 10.3 1.5 5.0 9.0 6 8 4.0 M6 13 1.5 40* 57 51.0 58.0 4 52.2 58.0 42 56 61 45.0 31.0 2.0 6 9.0 22.0 14.0 10.0 14.5 11.8 11.5 10.8 1.5 5.0 9.0 6 8 4.0 M6 13 1.5 43* 60 54.0 61.0 4 53.3 62.0 45 59 65 45.0 31.0 2.0 6 9.0 22.0 14.0 10.0 17.0 13.2 14.3 12.0 2.0 6.0 9.0 6 8 4.0 M6 13 1.5 45* 62 56.0 63.0 4 55.3 64.0 47 61 66 45.0 31.0 2.0 6 9.0 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6.0 9.0 6 8 4.0 M6 13 1.5 48* 65 59.0 66.0 4 59.7 68.4 50 64 69 45.0 31.0 2.0 6 9.0 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6.0 9.0 6 8 4.0 M6 13 1.5 50* 67 62.0 70.0 4 60.8 69.3 52 66 71 47.5 32.5 2.5 6 9.0 23.0 15.0 10.5 17.0 12.8 14.3 11.6 2.0 6.0 9.5 6 8 4.5 M6 13 1.5 53* 70 65.0 73.0 4 63.8 72.3 55 69 75 47.5 32.5 2.5 6 9.0 23.0 15.0 12.0 17.0 13.5 14.3 12.3 2.0 6.0 11.0 6 8 4.5 M6 13 1.5 55* 72 67.0 75.0 4 66.5 75.4 57 71 76 47.5 32.5 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 11.0 6 8 4.5 M6 13 1.5 58* 79 70.0 78.0 4 69.5 78.4 60 78 83 52.5 37.5 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 11.0 8 9 5.5 M8 13 1.9 60* 81 72.0 80.0 4 71.5 80.4 62 80 85 52.5 37.5 2.5 6 9.0 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6.0 11.0 8 9 5.5 M8 13 1.9 63* 84 75.0 83.0 4 74.5 83.4 65 83 88 52.5 37.5 2.5 6 9.0 23.0 15.0 12.0 18.0 14.2 15.3 13.3 2.0 6.0 11.0 8 9 5.5 M8 13 1.9 65* 86 77.0 85.0 4 76.5 85.4 67 85 95 52.5 37.5 2.5 6 9.0 23.0 15.0 12.0 18.0 14.2 15.3 13.0 2.0 6.0 11.0 8 9 5.5 M8 13 1.9 68* 89 81.0 90.0 4 82.7 91.5 70 88 93 52.5 34.5 2.5 7 9.0 26.0 18.0 12.5 19.0 14.9 16.0 13.7 2.0 6.0 11.3 8 9 4.0 M8 13 1.9 70* 91 83.0 92.0 4 83.0 92.0 72 90 95 60.0 42.0 2.5 7 9.0 26.0 18.0 12.5 18.0 14.2 15.3 13.0 2.0 6.0 11.3 8 9 5.5 M8 16 1.9 75* 99 88.0 97.0 4 90.2 99.0 77 99 105 60.0 42.0 2.5 7 9.0 26.0 18.0 12.5 18.0 15.2 15.3 14.0 2.0 6.0 11.3 8 10 5.5 M8 16 1.9 80* 104 95.0 105.0 4 95.2 104.0 82 104 109 60.0 41.8 3.0 7 9.0 26.2 18.2 13.0 19.0 16.2 16.3 15.0 2.0 6.0 12.0 8 10 5.5 M8 16 1.9 85* 109 100.0 110.0 4 100.2 109.0 87 109 114 60.0 41.8 3.0 7 9.0 26.2 18.2 15.0 19.0 16.0 16.3 14.8 2.0 6.0 14.0 8 10 5.5 M8 16 1.9 90* 114 105.0 115.0 4 105.2 114.0 92 114 119 65.0 46.8 3.0 7 9.0 26.2 18.2 15.0 19.0 16.0 16.3 14.8 2.0 6.0 14.0 10 10 8.0 M8 22 2.3 95* 119 110.0 120.0 4 111.6 120.3 97 119 124 65.0 47.8 3.0 7 9.0 25.2 17.2 15.0 20.0 17.0 17.3 15.8 2.0 6.0 14.0 10 10 8.0 M8 22 2.3 100* 124 115.0 125.0 4 114.5 123.3 102 124 129 65.0 47.8 3.0 7 9.0 25.2 17.2 15.0 20.0 17.0 17.3 15.8 2.0 6.0 14.0 10 10 8.0 M8 22 2.3 105* 138 122.2 134.3 5 – – 108 – 143 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 110* 143 128.2 140.3 5 – – 113 – 148 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 115* 148 136.2 148.3 5 – – 118 – 153 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 120* 153 138.2 150.3 5 – – 123 – 158 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 125* 158 142.2 154.3 5 – – 128 – 163 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 130* 163 146.2 158.3 5 – – 133 – 168 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 135* 168 152.2 164.3 5 – – 138 – 173 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 140* 173 156.2 168.3 5 – – 143 – 178 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 145* 178 161.2 173.3 5 – – 148 – 183 67.0 47.0 2.0 10 – 30.0 20.0 – – – – – – – – 10 10 – M8 20 2.3 150* 183 168.2 180.3 5 – – 153 – 188 69.0 47.0 2.0 10 – 32.0 22.0 – – – – – – – – 10 10 – M8 20 2.3 155* 191 173.2 185.3 5 – – 158 – 196 80.0 56.0 2.0 12 – 34.0 24.0 – – – – – – – – 12 12 – M8 24 2.1 160* 196 178.2 190.3 5 – – 163 – 201 80.0 56.0 2.0 12 – 34.0 24.0 – – – – – – – – 12 12 – M8 24 2.1 165* 201 183.2 195.3 5 – – 168 – 206 80.0 56.0 2.0 12 – 34.0 24.0 – – – – – – – – 12 12 – M8 24 2.1 170* 206 188.2 200.3 5 – – 173 – 211 80.0 56.0 2.0 12 – 34.0 24.0 – – – – – – – – 12 12 – M8 24 2.1 175* 211 193.2 205.3 5 – – 178 – 216 80.0 56.0 2.0 12 – 34.0 24.0 – – – – – – – – 12 12 – M8 24 2.1 180* 216 207.5 219.3 5 – – 183 – 221 84.0 56.0 2.0 12 – 38.0 28.0 – – – – – – – – 12 12 – M8 24 2.1 185* 221 212.5 224.3 5 – – 188 – 226 84.0 56.0 2.0 12 – 38.0 28.0 – – – – – – – – 12 12 – M8 24 2.1 190* 226 217.5 229.3 5 – – 193 – 231 84.0 56.0 2.0 12 – 38.0 28.0 – – – – – – – – 12 12 – M8 24 2.1 195* 231 222.5 234.3 5 – – 198 – 236 84.0 56.0 2.0 12 – 38.0 28.0 – – – – – – – – 12 12 – M8 24 2.1 > 200 on request 1 200* 236 227.5 239.3 5 – – 203 – 241 84.0 56.0 2.0 12 – 38.0 28.0 – – – – – – – – 12 12 – M8 24 2.1 d Burgmann Mechanical Seals Design Manual 15.3 31 For plain shafts, springs rotating M74-D ) 2 ) 3 1) d1 > 100 mm: 30° 2) d1 > 100: +0,1 3) d1 > 100: H7 Double seal M74-D Stationary seats Unbalanced Item Part no. Description Independent no. to DIN of direction of rotation 24250 Multiple springs 1.1 472.1 Seal face 1.2 472.2 Seal face – G4 Double seals in the M74-D series have 1.3 474 Thrust ring the same design-features as the “M7“ 1.4 485 Drive collar family of single seals (easy-to-replace 1.5 477 pring seal faces, etc.). Apart from the installati- 1.6 904 Set screw on length of the drive collar, all fitting 1.7 412.1 O-ring dimensions (d <100 mm) conform with 1 1.8 412.2 O-ring – G13 EN 12756. 2 475.1 Type G9 stationary seat Operating limits (see note on page 1) 3 412.3 O-ring 4 475.2 Type G9 stationary seat d1 = 18 ... 200 mm m0.625" ... 8" 5 412.4 O-ring p1 = 16 (25) bar m230 (360) PSI t = –50 ... 220 °C m(–20 ... 180 °C*) Torque transmission vg = 20 m/s (10 m/s*) m66 (33) ft/s *) Limit for shrink-fitted carbide seal faces – G6 м Spring loaded drive pin: M74-D22 with d1 105 mm EN 12756 Axial movement DIN 24960 d1 Ϲ100 mm 0.5 mm d >100 mm 2.0 mm 1 Unquoted dim. as for item 2 + 4. Combination of materials Dimensions are identical throughout the M7 series, so it is possible to use the same face materials as for type M7N (see page 30). – drive pin – 1.4.1 – disk – 1.4.2 Double seals to EN 12756 – thrust spring – 1.4.3 EN specifies single seals in a back-to- back arrangement. It is possible, there- For d1 >100 mm: 4 set screws with fore, to choose from the following combi- cone points (standard arrangement) nations: – unbalanced/unbalanced 4 screws each – (e.g. M7N/M7N) offset 90° – balanced/balanced (e.g. H7N/H7N) – unbalanced/balanced (e.g. M7N/ H7N). Please consult the single-seal tables for dimensions. 32 Burgmann Mechanical Seals Design Manual 15.3 M74F-D Dimensions, item no’s and descriptions M74-D as for type M74-D, but with pumping screw (Item no. 1.4). Dependent on direction of rotation! Torque transmission via set screws with cone points. d1 d3 d6f d7f d8 d9 d11i d12 ds l1g l3 l4f l5 l6 l9 l8f l9f l10 l11 i l12 l13 l14 l15 l16 l28 l31 l35 mx tg 18 33 27.0 33.0 3 4 24.0 30.0 – 61.0 38 19.0 2.0 5 9 19.5 11.5 8.5 12.5 9.0 10.0 8.0 1.5 5 7.5 17.0 15 M5 3.5 20 35 29.0 35.0 3 4 29.5 35.0 – 61.0 38 19.0 2.0 5 9 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5 7.5 17.0 15 M5 3.5 22 37 31.0 37.0 3 4 29.5 35.0 42 61.0 38 19.0 2.0 5 9 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5 7.5 17.0 15 M5 3.5 24 39 33.0 39.0 3 4 32.0 38.0 44 61.0 38 19.0 2.0 5 9 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5 7.5 17.0 15 M5 3.5 25 40 34.0 40.0 3 4 32.0 38.0 45 61.0 38 19.0 2.0 5 9 19.5 11.5 8.5 12.5 8.5 9.5 7.5 1.5 5 7.5 17.0 15 M5 3.5 28 43 37.0 43.0 3 4 36.0 42.0 47 62.0 39 19.5 2.0 5 9 19.5 11.5 8.5 14.0 10.0 11.0 9.0 1.5 5 7.5 17.5 15 M6 3.5 30 45 39.0 45.0 3 4 39.2 45.0 49 62.0 39 19.5 2.0 5 9 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5 7.5 17.5 15 M6 3.5 32 47 42.0 48.0 3 4 42.2 48.0 51 62.0 39 19.5 2.0 5 9 19.5 11.5 8.5 14.0 11.5 11.0 10.5 1.5 5 7.5 17.5 15 M6 3.5 33 48 42.0 48.0 3 4 44.2 50.0 51 62.0 39 19.5 2.0 5 9 19.5 11.5 8.5 14.5 12.0 11.5 10.5 1.5 5 7.5 17.5 15 M6 3.5 35 50 44.0 50.0 3 4 46.2 52.0 54 62.0 39 19.5 2.0 5 9 19.5 11.5 8.5 14.5 12.0 11.5 11.0 1.5 5 7.5 17.5 15 M6 3.5 38 55 49.0 56.0 4 4 49.2 55.0 59 69.0 41 20.5 2.0 6 9 22.0 14.0 10.0 14.5 11.3 11.5 10.3 1.5 5 9.0 18.5 15 M6 3.5 40 57 51.0 58.0 4 4 52.2 58.0 61 70.0 42 21.0 2.0 6 9 22.0 14.0 10.0 14.5 11.8 11.5 10.8 1.5 5 9.0 19.0 15 M6 3.5 43 60 54.0 61.0 4 4 53.3 62.0 65 70.0 42 21.0 2.0 6 9 22.0 14.0 10.0 17.0 13.2 14.3 12.0 2.0 6 9.0 19.0 15 M6 3.5 45 62 56.0 63.0 4 4 55.3 64.0 66 70.0 42 21.0 2.0 6 9 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6 9.0 19.0 15 M6 3.5 48 65 59.0 66.0 4 4 59.7 68.4 69 70.0 42 21.0 2.0 6 9 22.0 14.0 10.0 17.0 12.8 14.3 11.6 2.0 6 9.0 19.0 15 M6 3.5 50 67 62.0 70.0 4 4 60.8 69.3 71 73.0 43 21.5 2.5 6 9 23.0 15.0 10.5 17.0 12.8 14.3 11.6 2.0 6 9.5 19.5 15 M6 3.5 53 70 65.0 73.0 4 4 63.8 72.3 75 73.0 43 21.5 2.5 6 9 23.0 15.0 12.0 17.0 13.5 14.3 12.3 2.0 6 11.0 19.5 15 M6 3.5 55 72 67.0 75.0 4 4 66.5 75.4 76 73.0 43 21.5 2.5 6 9 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6 11.0 19.5 15 M8 3.5 58 79 70.0 78.0 4 5 69.5 78.4 83 86.0 56 28.0 2.5 6 9 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6 11.0 23.5 19 M8 3.5 60 81 72.0 80.0 4 5 71.5 80.4 85 86.0 56 28.0 2.5 6 9 23.0 15.0 12.0 18.0 14.5 15.3 13.3 2.0 6 11.0 23.5 19 M8 3.5 63 84 75.0 83.0 4 5 74.5 83.4 88 85.0 55 27.5 2.5 6 9 23.0 15.0 12.0 18.0 14.2 15.3 13.3 2.0 6 11.0 24.5 19 M8 3.5 65 86 77.0 85.0 4 5 76.5 85.4 95 85.0 55 27.5 2.5 6 9 23.0 15.0 12.0 18.0 14.2 15.3 13.0 2.0 6 11.0 24.5 19 M8 3.5 68 89 81.0 90.0 4 5 82.7 91.5 93 91.0 55 27.5 2.5 7 9 26.0 18.0 12.5 19.0 14.9 16.0 13.7 2.0 6 11.3 24.5 19 M8 3.5 70 91 83.0 92.0 4 5 83.0 92.0 95 92.0 56 28.0 2.5 7 9 26.0 18.0 12.5 18.0 14.2 15.3 13.0 2.0 6 11.3 23.5 19 M8 3.5 75 99 88.0 97.0 4 5 90.2 99.0 105 92.0 56 28.0 2.5 7 9 26.0 18.0 12.5 18.0 15.2 15.3 14.0 2.0 6 11.3 25.5 19 M8 3.5 80 104 95.0 105.0 4 5 95.2 104.0 109 92.5 56 28.0 3.0 7 9 26.2 18.2 13.0 19.0 16.2 16.3 15.0 2.0 6 12.0 25.5 19 M8 3.5 85 109 100.0 110.0 4 5 100.2 109.0 114 92.5 56 28.0 3.0 7 9 26.2 18.2 15.0 19.0 16.0 16.3 14.8 2.0 6 14.0 25.0 19 M8 3.5 90 114 105.0 115.0 4 5 105.2 114.0 119 92.5 56 28.0 3.0 7 9 26.2 18.2 15.0 19.0 16.0 16.3 14.8 2.0 6 14.0 25.5 19 M8 3.5 95 119 110.0 120.0 4 5 111.6 120.3 124 90.5 56 28.0 3.0 7 9 25.2 17.2 15.0 20.0 17.0 17.3 15.8 2.0 6 14.0 25.0 19 M8 3.5 100 124 115.0 125.0 4 5 114.5 123.3 129 90.5 56 28.0 3.0 7 9 25.2 17.2 15.0 20.0 17.0 17.3 15.8 2.0 6 14.0 25.0 19 M8 3.5 105 138 122.2 134.3 5 7 – – 143 108.0 68 34.0 2.0 10 – 30.0 20.0 – – – – – – – – 30.5 22 M8 3.5 110 143 128.2 140.3 5 7 – – 148 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 115 148 136.2 148.3 5 7 – – 153 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 120 153 138.2 150.3 5 7 – – 158 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 125 158 142.2 154.3 5 7 – – 163 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 130 163 146.2 158.3 5 7 – – 168 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 135 168 152.2 164.3 5 7 – – 173 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 140 173 156.2 168.3 5 7 – – 178 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 145 178 161.2 173.3 5 7 – – 183 110.0 70 35.0 2.0 10 – 30.0 20.0 – – – – – – – – 31.5 22 M8 3.5 150 183 168.2 180.3 5 7 – – 188 114.0 70 35.0 2.0 10 – 32.0 22.0 – – – – – – – – 31.5 22 M8 3.5 155 191 173.2 185.3 5 7 – – 196 127.0 79 39.5 2.0 12 – 34.0 24.0 – – – – – – – – 35.5 22 M8 3.5 160 196 178.2 190.3 5 7 – – 201 127.0 79 39.5 2.0 12 – 34.0 24.0 – – – – – – – – 35.5 22 M8 3.5 165 201 183.2 195.3 5 7 – – 206 127.0 79 39.5 2.0 12 – 34.0 24.0 – – – – – – – – 35.5 22 M8 3.5 170 206 188.2 200.3 5 7 – – 211 127.0 79 39.5 2.0 12 – 34.0 24.0 – – – – – – – – 35.5 22 M8 3.5 175 211 193.2 205.3 5 7 – – 216 127.0 79 39.5 2.0 12 – 34.0 24.0 – – – – – – – – 35.5 22 M8 3.5 180 216 207.5 219.3 5 7 – – 221 135.0 79 39.5 2.0 12 – 38.0 28.0 – – – – – – – – 35.5 22 M8 3.5 185 221 212.5 224.3 5 7 – – 226 135.0 79 39.5 2.0 12 – 38.0 28.0 – – – – – – – – 35.5 22 M8 3.5 190 226 217.5 229.3 5 7 – – 231 135.0 79 39.5 2.0 12 – 38.0 28.0 – – – – – – – – 35.5 22 M8 3.5 195 231 222.5 234.3 5 7 – – 236 135.0 79 39.5 2.0 12 – 38.0 28.0 – – – – – – – – 35.5 22 M8 3.5 200 236 227.5 239.3 5 7 – – 241 135.0 79 39.5 2.0 12 38.0 28.0 – – – – – – – – 35.5 22 M8 3.5 Burgmann Mechanical Seals Design Manual 15.3 33 For plain shafts, rotating spring MG9 Single seal MG9 Seats Unbalanced Item Part No. Description Independent of direction DIN of rotation 24250 1.1 472 Seal face Elastomer bellows 1.2 481 Bellows The MG9 is (US Patent No. 6,220,601) 1.3 485 Driver collar –G50 designed for medium-range pressures 1.4 484.1 “L” ring Euro standard and loads. Within its operating limits it 1.5 474 Washer can be put to universal use in pumps 2 477 Spring thanks to the following attributes: 3 475 Seat ● for all fitting lengths only one bellows 4 412 Corner sleeve unit for each size of diameter ● length compensation by means of a Operating limits (see note on page 1) conical spring of required length, with single easy-to-fit clamp-type connector d1 = 10 ... 100 mm 0.375 ... 4“ ● no need to change existing pump p1*= 8 (12) bar 116 (174) PSI –G55 installation spaces t* = –20 ... +90 (140) °C US standard ● smallest external diameter of all bel- = –4 ... +194 (284) °F lows seals on the world market vg = 10 m/s 33 ft/s ● no torsion on bellows and spring permissible axial movement: ± 0.5 mm ● no adhesive joints *) dependent on the medium, size and ● self-centering conical spring (suppor- materials ted directly on the shaft collar without an additional washer) Materials ● technical approval issued by a top- name, global pump manufacturer –G60 ● compact, unsplit bellows unit with sta- Seal component Material EN 12756 tionary seal face for reliable installati- (DIN) Standard Special (DIN 24960) on and operation (deposits between Seal face Carbon (B) the bellows and the seal face are im- SiC (Q1) possible, ruling out all risk of misalign- Seat Ceramic (V) ment) SiC (Q1) Bellows / Perbunan (P) Corner Viton® (V) sleeve EPDM (E) Spring 1.4310 (F) 1.4571 (G) Driver collar / 1.4301 (F) “L” ring 1.4571 (G) 1.4401 34 Burgmann Mechanical Seals Design Manual 15.3 A MG9 ... the alternative d d d d d d d l l l l l l l l l 1 6 7 14 16 a bi 1t 1K 1N 1S 5i 6 17 28 29 Burgmann* Crane* Sealol* Dimensions Table 10 17 21 11.0 24.60 19.6 13.0 53.0 32.5 40 34.0 1.5 4 7.5 6.6 9.0 MG910/d -G50 1A 43 CE long inch / mm B 12 19 23 13.5 27.80 21.6 15.0 53.0 32.5 40 34.0 1.5 4 7.5 6.6 9.0 1 1A 43 CE long mm A 14 21 25 17.0 30.95 24.0 18.0 54.5 35.0 40 35.5 1.5 4 9.0 6.6 10.5 15 – – 17.0 30.95 25.0 19.0 54.5 – – 35.5 – – 9.0 – 10.5 MG920/d -G50 2 43 CE short inch / mm B 16 23 27 17.0 30.95 26.5 20.0 54.5 35.0 40 35.5 1.5 4 9.0 6.6 10.5 1 2 43 CE short mm A 18 27 33 20.0 34.15 29.0 22.0 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.5 20 29 35 21.5 35.70 31.5 24.5 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.5 MG901/d -G55 1 43 CU long inch (USA only) 22 31 37 23.0 37.30 33.0 27.0 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.5 1 C 24 33 39 26.5 40.50 37.0 29.0 54.5 40.0 50 35.5 2.0 5 9.0 7.5 10.5 MG921/d -G55 2 43 CU short inch (USA only) C 25 1 34 40 26.5 40.50 38.0 30.0 54.5 40.0 50 35.5 2.0 5 9.0 7.5 10.5 21 43 CU short inch (USA only) 28 37 43 29.5 47.65 41.0 34.0 72.0 42.5 50 45.0 2.0 5 10.5 7.5 12.0 C 30 39 45 32.5 50.80 43.0 36.0 72.0 42.5 50 45.0 2.0 5 10.5 7.5 12.0 MG912/d -G60 502 43 DIN mm A 32 1 42 48 32.5 50.80 45.0 38.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.0 521 43 DIN mm A 33 42 48 36.5 54.00 46.0 39.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.0 2100-l 43 DIN mm MG9 35 44 50 36.5 54.00 48.0 41.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.0 1k A 38 49 56 39.5 57.15 52.5 44.5 72.0 45.0 55 45.0 2.0 6 10.5 9.0 12.0 MG913/d -G60 2100-l mm A 40 51 58 42.5 60.35 55.5 47.5 72.0 45.0 55 45.0 2.0 6 10.5 9.0 12.0 1 1N 43 54 61 46.0 63.50 58.5 50.5 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.0 * identical fitting dimensions 45 56 63 46.0 63.50 60.5 52.5 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.0 48 59 66 49.0 66.70 64.0 56.0 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.0 50 62 70 52.0 69.85 66.0 58.0 84.5 47.5 60 54.5 2.5 6 12.0 9.5 13.5 53 65 73 55.5 73.05 69.0 61.0 84.5 47.5 70 54.5 2.5 6 12.0 11.0 13.5 55 67 75 58.5 76.20 71.0 63.0 84.5 47.5 70 54.5 2.5 6 12.0 11.0 13.5 58 70 78 61.5 79.40 76.0 66.0 84.5 52.5 70 54.5 2.5 6 12.0 11.0 13.5 60 72 80 61.5 79.40 78.0 68.0 84.5 52.5 70 54.5 2.5 6 12.0 11.0 13.5 63 75 83 – – 82.0 71.5 – 52.5 70 – 2.5 6 – 11.0 – 65 77 85 68.0 92.10 84.0 73.5 86.0 52.5 80 65.0 2.5 6 14.5 11.0 16.0 68 81 90 71.0 95.25 87.0 76.5 86.0 52.5 80 65.0 2.5 7 14.5 11.3 16.0 70 83 92 71.0 95.25 89.0 79.0 86.0 60.0 80 65.0 2.5 7 14.5 11.3 16.0 75 88 97 77.5 101.60 95.0 85.0 89.0 60.0 80 68.0 2.5 7 14.5 11.3 16.0 80 95 105 84.0 114.30 101.5 91.5 99.0 60.0 90 76.0 3.0 7 18.5 12.0 20.0 85 100 110 87.0 117.50 – – 99.0 60.0 90 76.0 3.0 7 18.5 14.0 20.0 90 105 115 93.5 123.85 111.5 103.0 103.0 65.0 90 79.0 3.0 7 18.5 14.0 20.0 95 110 120 96.5 127.00 – – 103.0 65.0 90 79.0 3.0 7 18.5 14.0 20.0 100 115 125 103.0 133.35 122.5 114.0 106.0 65.0 90 82.0 3.0 7 18.5 14.0 20.0 B Dimensions in inches / mm C Dimensions in inches d1 d1 d14 d16 da dbi l1 tl1S l17 l29 d1 d61 d71 da db il14 l15 l41 l51 l61 0.375“ 9.53 11.0 24.60 18.8 12.5 53.0 34.0 7.5 9.0 0.375 0.625 0.875 0.740 0.492 1.125 1.500 0.313 0.050 0.250 0.500“ 12.70 13.5 27.80 22.3 16.0 53.0 34.0 7.5 9.0 0.500 0.750 1.000 0.878 0.630 1.125 1.500 0.313 0.050 0.250 0.625“ 15.88 17.0 30.95 26.5 20.0 54.5 35.5 9.0 10.5 0.625 0.937 1.250 1.043 0.787 1.281 1.718 0.406 0.050 0.344 0.750“ 19.05 20.0 34.15 29.5 23.0 54.5 35.5 9.0 10.5 0.750 1.062 1.375 1.161 0.905 1.281 1.718 0.406 0.050 0.344 0.875“ 22.23 23.0 37.30 33.0 27.0 54.5 35.5 9.0 10.5 0.875 1.187 1.500 1.299 1.063 1.343 1.781 0.406 0.050 0.344 1.000“ 25.40 26.5 40.50 38.0 30.5 54.5 35.5 9.0 10.5 1.000 1.312 1.625 1.496 1.200 1.437 2.000 0.437 0.050 0.375 1.125“ 28.58 29.5 47.65 41.5 34.5 72.0 45.0 10.5 12.0 1.125 1.437 1.750 1.634 1.358 1.500 2.062 0.437 0.050 0.375 1.250“ 31.75 32.5 50.80 45.0 38.0 72.0 45.0 10.5 12.0 1.250 1.563 1.875 1.772 1.496 1.500 2.062 0.437 0.050 0.375 1.375“ 34.93 36.5 54.00 48.0 41.0 72.0 45.0 10.5 12.0 1.375 1.687 2.000 1.890 1.614 1.562 2.124 0.437 0.050 0.375 1.500“ 38.10 39.5 57.15 52.5 44.5 72.0 45.0 10.5 12.0 1.500 1.813 2.125 2.067 1.752 1.562 2.124 0.437 0.050 0.375 1.625“ 41.28 42.5 60.35 57.0 48.5 72.0 45.0 10.5 12.0 1.625 2.000 2.375 2.244 1.909 1.875 2.500 0.500 0.050 0.437 1.750“ 44.45 46.0 63.50 60.5 51.5 83.0 53.0 10.5 12.0 1.750 2.125 2.500 2.382 2.028 1.875 2.500 0.500 0.050 0.437 1.875“ 47.63 49.0 66.70 64.0 55.0 83.0 53.0 10.5 12.0 1.875 2.250 2.625 2.520 2.165 2.000 2.625 0.500 0.050 0.437 2.000“ 50.80 52.0 69.85 66.0 58.0 84.5 54.5 12.0 13.5 2.000 2.375 2.750 2.598 2.283 2.000 2.625 0.500 0.050 0.437 2.125“ 53.98 55.5 73.05 71.0 61.5 84.5 54.5 12.0 13.5 2.125 2.375 3.000 2.795 2.421 2.249 2.937 0.562 0.050 0.500 2.250“ 57.15 58.5 76.20 76.5 65.0 84.5 54.5 12.0 13.5 2.250 2.437 3.125 2.992 2.559 2.249 2.937 0.562 0.050 0.500 2.375“ 60.33 61.5 79.40 78.5 68.5 84.5 54.5 12.0 13.5 2.375 2.563 3.250 3.071 2.697 2.375 3.062 0.562 0.050 0.500 2.500“ 63.50 65.0 82.55 82.0 72.0 84.5 54.5 12.0 13.5 2.500 2.687 3.375 3.228 2.834 2.375 3.062 0.562 0.050 0.500 2.625“ 66.68 68.0 92.10 84.0 75.0 86.0 65.0 14.5 16.0 2.625 2.812 3.375 3.307 2.953 2.562 3.375 0.625 0.100 0.562 2.750“ 69.85 71.0 95.25 89.0 79.0 86.0 65.0 14.5 16.0 2.750 2.937 3.500 3.504 3.110 2.562 3.375 0.625 0.100 0.562 2.875“ 73.03 74.5 98.45 92.5 82.0 89.0 68.0 14.5 16.0 2.875 3.062 3.750 3.642 3.228 2.687 3.500 0.625 0.100 0.562 3.000“ 76.20 77.5 101.60 95.5 85.5 89.0 68.0 14.5 16.0 3.000 3.187 3.875 3.760 3.366 2.687 3.500 0.625 0.100 0.562 3.125“ 79.38 80.5 111.15 101.5 91.0 99.0 76.0 18.5 20.0 3.125 3.312 4.000 4.000 3.583 2.968 3.906 0.781 0.100 0.656 3.250“ 82.55 84.0 114.30 – – 99.0 76.0 18.5 20.0 3.250 3.437 4.125 – – 2.968 3.906 0.781 0.100 0.656 3.375“ 85.73 87.0 117.50 – – 99.0 76.0 18.5 20.0 3.375 3.562 4.250 – – 2.968 3.906 0.781 0.100 0.656 3.500“ 88.90 90.5 120.65 111.5 100.0 99.0 76.0 18.5 20.0 3.500 3.687 4.375 4.390 3.937 2.968 3.906 0.781 0.100 0.656 3.625“ 92.08 93.5 123.85 – – 103.0 79.0 18.5 20.0 3.625 3.812 4.500 – – 3.093 4.031 0.781 0.100 0.656 3.750“ 95.25 96.5 127.00 118.0 108.0 103.0 79.0 18.5 20.0 3.750 3.937 4.625 4.646 4.252 3.093 4.031 0.781 0.100 0.656 3.875“ 98.43 100.0 130.20 – – 106.0 82.0 18.5 20.0 3.875 4.062 4.750 – – 3.218 4.156 0.781 0.100 0.656 4.000“ 101.60 103.0 133.35 125.0 116.0 106.0 82.0 18.5 20.0 4.000 4.187 4.875 4.921 4.567 3.218 4.156 0.781 0.100 0.656 Burgmann Mechanical Seals Design Manual 15.3 35 For plain shafts, spring rotating MG1 h 8 MG12 Dimensions, items and designations same as for MG1, but with an extended bellows tail to achieve the fitting length I1K according to EN 12756 in combinati- on with seat G6 or G60. (d4 min acc. to EN 12756 is exceeded). Single seal MG1 Stationary seats Unbalanced Item Part No. Description Independent DIN of direction of rotation 24250 Elastomer bellows 1.1 472 Seal face 1.2 481 Bellows – G4 Mechanical seals of the MG series are 1.3 484.2 "L“-ring amongst the most commonly used. The (spring collar) bellows is not subjected to any torsional 1.4 484.1 "L“-ring + 0,5 stress and its ingenious design incorpo- (spring collar) rates several functions, as seal face carri- 1.5 477 Spring er, secondary sealing element and drive 2 475 Seat collar. The seal face is driven through the 3 412 O-ring or cup rubber spring and “L“-rings. There are no bonded – G9 joints and all the face materials are inter- Operating limits (see note on page 1) changeable without having to modify any EN 12756 dimensions. Highly recommended for du- d1 = 10 ... 100 mm ties with media containing solids eg. in p1 = 12 (16) bar m170 (230) PSI waste water and sewage applications. vacuum up to 0.5 bar (up to 1 bar with seat locking) t = –20 ... +120 (140) °C – G6* –4 °F ... +250 (284) °F EN 12756 vg = 10 m/s m33 ft/s Materials – G606* EN 12756 Seal faces Seats G4, G6 G9 G50 G60 G606 Q1 SVQ1 SVVQ1 B A – Q –– ––– – – G60* 1 EN 12756 U3 –––––––– Seal faces and seats Aluminium oxide (V) (see table for combinations): Carbon graphite, resin-impregnated (B) Silicon carbide SiC (Q1) Carbon graphite, Bellows: FPM (V), EPDM (E), NBR (P) – G50 antimony-impregnated (A) Springs, “L“-rings: 1.4571 (G), ® Tungsten carbide (U3) Hastelloy C4 possible, please inquire. Special cast Designations ( ) according to EN 12756. chromium-molybdenum steel (S) *) Unquoted dimensions as for G9 36 Burgmann Mechanical Seals Design Manual 15.3 MG13 MG1S20 RMG12 (not illustrated) MG1 multiple seal Dimensions, items and designations Dimensions, items and designations Identical to MG1, but with a special bel- The MG1 can also be used as a double MG1 same as for MG 1, but with an extended same as for MG 1, but with an extended lows surface on the shaft side. For use in seal in tandem or back-to-back arrange- bellows tail to achieve the fitting length bellows tail to achieve the special fit- hot-water pumps at up to 120 °C ment. Installation proposals can be sup- I 1N according EN 12756 in combination ting length I1S in combination with seat and 25 bar and/or 140 °C/16 bar. plied on request. with seat G6 or G60. (d4 min acc. to EN G50. Only in combination with seat G606. 12756 is exceeded). d1 = 12 ... 38 mm d1 d3f d6 d7 d8 d11 d12 d14 d16f dan db*) dm*) ds*) dST lm l1n l1Ki l1N l1Sl l2n l3 l5i l6 l7i l8n l9g l10 l12 l14 l15 l16 l17 l28 L29 Ri 10 15.7 17 21 3 15.5 19.2 11.0 24.60 22.5 20.5 18 18 24 14.5 25.9 32.5 40 34.0 33.4 25 1.5 4 8.5 17.5 10.0 7.5 7.5 6.6 1.2 3.8 7.5 6.6 9.0 1.2 12 17.7 19 23 3 17.5 21.6 13.5 27.80 25.0 22.5 20 20 26 15.0 25.9 32.5 40 34.0 33.4 25 1.5 4 8.5 17.5 10.0 7.5 6.5 5.6 1.2 3.8 7.5 6.6 9.0 1.2 14 19.7 21 25 3 20.5 24.6 17.0 30.95 28.5 26.5 22 22 30 17.0 28.4 35.0 40 35.5 33.4 25 1.5 4 8.5 17.5 10.0 7.5 6.5 5.6 1.2 3.8 9.0 6.6 10.5 1.2 15 20.8 – – – 20.5 24.6 17.0 30.95 28.5 26.5 22 22 30 17.0 28.4 – – 35.5 33.4 25 – – – – – – 7.5 6.6 1.2 3.8 9.0 – 10.5 1.2 16 21.0 23 27 3 22.0 28.0 17.0 30.95 28.5 26.5 22 22 30 17.0 28.4 35.0 40 35.5 33.4 25 1.5 4 8.5 17.5 10.0 7.5 8.5 7.5 1.5 5.0 9.0 6.6 10.5 1.5 18 23.7 27 33 3 24.0 30.0 20.0 34.15 32.0 29.0 29 26 33 19.5 30.0 37.5 45 35.5 37.5 25 2.0 5 9.0 19.5 11.5 8.5 9.0 8.0 1.5 5.0 9.0 7.5 10.5 1.5 19 26.7 – – – – – 20.0 34.15 37.0 33.0 33 28 38 21.5 30.0 – – 35.5 37.5 25 – – – – – – – – – – 9.0 – 10.5 – 20 26.7 29 35 3 29.5 35.0 21.5 35.70 37.0 33.0 33 28 38 21.5 30.0 37.5 45 35.5 37.5 25 2.0 5 9.0 19.5 11.5 8.5 8.5 7.5 1.5 5.0 9.0 7.5 10.5 1.5 22 27.7 31 37 3 29.5 35.0 23.0 37.30 37.0 33.0 33 28 38 21.5 30.0 37.5 45 35.5 37.5 25 2.0 5 9.0 19.5 11.5 8.5 8.5 7.5 1.5 5.0 9.0 7.5 10.5 1.5 24 31.2 33 39 3 32.0 38.0 26.5 40.50 42.5 38.0 38 32 44 22.5 32.5 40.0 50 35.5 42.5 25 2.0 5 9.0 19.5 11.5 8.5 8.5 7.5 1.5 5.0 9.0 7.5 10.5 1.5 25 31.2 34 40 3 32.0 38.0 26.5 40.50 42.5 38.0 38 32 44 23.0 32.5 40.0 50 35.5 42.5 25 2.0 5 9.0 19.5 11.5 8.5 8.5 7.5 1.5 5.0 9.0 7.5 10.5 1.5 28 35.0 37 43 3 36.0 42.0 29.5 47.65 49.0 44.0 37 37 50 26.5 35.0 42.5 50 45.0 42.5 33 2.0 5 9.0 19.5 11.5 8.5 10.0 9.0 1.5 5.0 10.5 7.5 12.0 1.5 30 37.0 39 45 3 39.2 45.0 32.5 50.80 49.0 44.0 37 37 50 26.5 35.0 42.5 50 45.0 42.5 33 2.0 5 9.0 19.5 11.5 8.5 11.5 10.5 1.5 5.0 10.5 7.5 12.0 1.5 32 40.2 42 48 3 42.2 48.0 32.5 50.80 53.5 46.0 41 41 55 27.5 35.0 42.5 55 45.0 47.5 33 2.0 5 9.0 19.5 11.5 8.5 11.5 10.5 1.5 5.0 10.5 7.5 12.0 1.5 33 40.2 42 48 3 44.2 50.0 36.5 54.00 53.5 46.0 41 41 55 27.5 35.0 42.5 55 45.0 47.5 33 2.0 5 9.0 19.5 11.5 8.5 12.0 11.0 1.5 5.0 10.5 7.5 12.0 1.5 35 43.2 44 50 3 46.2 52.0 36.5 54.00 57.0 50.0 44 44 59 28.5 35.0 42.5 55 45.0 47.5 33 2.0 5 9.0 19.5 11.5 8.5 12.0 11.0 1.5 5.0 10.5 7.5 12.0 1.5 38 46.2 49 56 4 49.2 55.0 39.5 57.15 59.0 53.0 53 47 61 30.0 36.0 45.0 55 45.0 46.0 33 2.0 6 9.0 22.0 14.0 10.0 11.3 10.3 1.5 5.0 10.5 9.0 12.0 1.5 40 48.8 51 58 4 52.2 58.0 42.5 60.35 62.0 55.0 55 49 64 30.0 36.0 45.0 55 45.0 46.0 33 2.0 6 9.0 22.0 14.0 10.0 11.8 10.8 1.5 5.0 10.5 9.0 12.0 1.5 42 51.8 – – – – – 46.0 63.50 65.5 58.0 53 53 67 30.0 36.0 – – 53.0 51.0 41 – – – – – – 13.2 12.0 2.0 6.0 10.5 – 12.0 2.5 43 51.8 54 61 4 53.3 62.0 46.0 63.50 65.5 58.0 53 53 67 30.0 36.0 45.0 60 53.0 51.0 41 2.0 6 9.0 22.0 14.0 10.0 13.2 12.0 2.0 6.0 10.5 9.0 12.0 2.5 45 53.8 56 63 4 55.3 64.0 46.0 63.50 68.0 60.0 55 55 70 30.0 36.0 45.0 60 53.0 51.0 41 2.0 6 9.0 22.0 14.0 10.0 12.8 11.6 2.0 6.0 10.5 9.0 12.0 2.5 48 56.8 59 66 4 59.7 68.4 49.0 66.70 70.5 63.0 58 58 74 30.5 36.0 45.0 60 53.0 51.0 41 2.0 6 9.0 22.0 14.0 10.0 12.8 11.6 2.0 6.0 10.5 9.0 12.0 2.5 50 58.8 62 70 4 60.8 69.3 52.0 69.85 74.0 65.0 60 60 77 30.5 38.0 47.5 60 54.5 50.5 41 2.5 6 9.0 23.0 15.0 10.5 12.8 11.6 2.0 6.0 12.0 9.5 13.5 2.5 53 62.2 65 73 4 63.8 72.3 55.5 73.05 78.5 70.0 63 63 81 33.0 36.5 47.5 70 54.5 59.0 41 2.5 6 9.0 23.0 15.0 12.0 13.5 12.3 2.0 6.0 12.0 11.0 13.5 2.5 55 64.2 67 75 4 66.5 75.4 58.5 76.20 81.0 72.0 65 65 83 35.0 36.5 47.5 70 54.5 59.0 41 2.5 6 9.0 23.0 15.0 12.0 14.5 13.3 2.0 6.0 12.0 11.0 13.5 2.5 58 67.2 70 78 4 69.5 78.4 61.5 79.40 85.5 75.0 68 68 88 37.0 41.5 52.5 70 54.5 59.0 41 2.5 6 9.0 23.0 15.0 12.0 14.5 13.3 2.0 6.0 12.0 11.0 13.5 2.5 60 70.0 72 80 4 71.5 80.4 61.5 79.40 88.5 79.0 70 70 91 38.0 41.5 52.5 70 54.5 59.0 41 2.5 6 9.0 23.0 15.0 12.0 14.5 13.3 2.0 6.0 12.0 11.0 13.5 2.5 65 75.0 77 85 4 76.5 85.4 68.0 92.10 93.5 84.0 77 77 96 40.0 41.5 52.5 80 65.0 69.0 49 2.5 6 9.0 23.0 15.0 12.0 14.2 13.0 2.0 6.0 14.5 11.0 16.0 2.5 68 78.0 81 90 4 82.7 91.5 71.0 95.25 96.5 88.0 80 80 100 40.0 41.2 52.5 80 65.0 68.7 49 2.5 7 9.0 26.0 18.0 12.5 14.9 13.7 2.0 6.0 14.5 11.3 16.0 2.5 70 80.0 83 92 4 83.0 92.0 71.0 95.25 99.5 90.0 82 82 103 40.0 48.7 60.0 80 65.0 68.7 49 2.5 7 9.0 26.0 18.0 12.5 14.2 13.0 2.0 6.0 14.5 11.3 16.0 2.5 75 85.5 88 97 4 90.2 99.0 77.5 101.60 107.0 95.0 87 87 110 40.0 48.7 60.0 80 68.0 68.7 52 2.5 7 9.0 26.0 18.0 12.5 15.2 14.0 2.0 6.0 14.5 11.3 16.0 2.5 80 90.5 95 105 4 95.2 104.0 84.0 114.30 112.0 100.0 92 92 116 40.0 48.0 60.0 90 76.0 78.0 56 3.0 7 9.0 26.2 18.2 13.0 16.2 15.0 2.0 6.0 18.5 12.0 20.0 2.5 85 96.0 100 110 4 100.2 109.0 87.0 117.50 120.0 107.0 97 97 124 41.0 46.0 60.0 90 76.0 76.0 56 3.0 7 9.0 26.2 18.2 15.0 16.0 14.8 2.0 6.0 18.5 14.0 20.0 2.5 90 102.0 105 115 4 105.2 114.0 93.5 123.85 127.0 114.0 104 104 131 45.0 51.0 65.0 90 79.0 76.0 59 3.0 7 9.0 26.2 18.2 15.0 16.0 14.8 2.0 6.0 18.5 14.0 20.0 2.5 95 107.0 110 120 4 111.6 120.3 96.5 127.00 132.0 119.0 109 109 136 46.0 51.0 65.0 90 79.0 76.0 59 3.0 7 9.0 25.2 17.2 15.0 17.0 15.8 2.0 6.0 18.5 14.0 20.0 2.5 100 112.0 115 125 4 114.5 123.3 103.0 133.35 137.0 124.0 114 114 140 47.0 51.0 65.0 90 82.0 76.0 62 3.0 7 9.0 25.2 17.2 15.0 17.0 15.8 2.0 6.0 18.5 14.0 20.0 2.5 Dimensions in mm. Fitting length tolerances: d1 10 ... 12 mm 0.5; d1 14 ... 18 mm 1.0; d 1 20 ... 26 mm 1.5; d 1 = 28 ... 100 mm 2.0 *) Minimum diameter of the mating collar Dimensions adaptations for specific conditions, e.g. shaft in inches or special seat dimensions are available on request.. Burgmann Mechanical Seals Design Manual 15.3 37 Welcome to our sealing world www.burgmann.com Burgmann Unitex®, the Ready inexpensive way to seal your pumps by way of a cartridge. The wide spectrum of applications on the it offers in the medium pressure and stress range makes the Unitex® the ideal way to replace packings for the price of a shaft sleeve. pump shaft... Fits all standard stuffing box compartments. Available ex warehouse. steady... Ask for a detailed brochure. go! 38 Burgmann Mechanical Seals Design Manual 15.3 For plain shafts, rotating spring (bellows) MF95N MF95N Single seal MF95N Technical features Balanced Item Part no. Description Independent of direction DIN MF95N mechanical seals have no 24250 dynamic O-ring and are therefore insensi- of rotation tive to deposits on the shaft. The flexibi- 1.1 472/481 Seal face with lity of the bellows does not deteriorate in Metal roller bellows bellows unit * any way, ensuring that the sealing gap EN 12756 1.2 412.1 O-ring remains closed. Roller bellows seals in the MF95N series 1.3 904 Threaded pin The seal face carrier has an amplitude have a very wide field of application and 2 475 Type G16 seat limiter to guarantee trouble-free and are particularly ideal for pumps in the 3 412.2 O-ring smooth running (important when there is waste water sector, the chemical industry, any risk of dry running). refineries and any areas needing to meet Operating limits (see note on page 1) A favourable bellows geometry pre- sterile requirements such as in the phar- vents the cavities becoming clogged by maceutical and food industries. These d = 14 ... 100 mm 0.55“ ... 3.94“ 1 media containing solids. An open structu- seals are rugged and insensitive to solids t = –40 ...+220 °C –40 °F ...428 °F re and smooth surface enables easy clea- in the medium. The combination of highly = (SiC against carbon) = ning if necessary. resistant materials and standardized = –40 ...+180 °C –40 °F ...356 °F The bellows has very good spring cha- dimensions offers great potential for stan- = (SiC against SiC) racteristics. Its longitudinal weld seam dardization projects. p = 16 bar 232 PSI has no negative impact. Axial pressure is v = 20 m/s 66 ft/s g evenly distributed by the roller bellows, permissible axial movement: ± 0.5 mm Materials guaranteeing reliable adaptation of the ® sliding face even when there are axial Bellows: M5 Hastelloy C deflections. Bellows support: G1 Seal faces: Q12, B, A Seat: Q1 d1 d3 d6 d7 d8 l1k l3 l5 l6 l7 l8 d1 d3 d6 d7 d8 l1k l3 l5 l6 l7 l8 14 24 21 25 3 35.0 30.5 1.5 4 8.5 15.0 48 64 59 66 4 45.0 37.0 2.0 6 9.0 16.0 16 26 23 27 3 35.0 29.5 1.5 4 8.5 15.0 50 66 62 70 4 47.5 38.0 2.5 6 9.0 17.0 18 32 27 33 3 37.5 30.5 2.0 5 9.0 15.0 53 69 65 73 4 47.5 38.0 2.5 6 9.0 17.0 20 34 29 35 3 37.5 30.5 2.0 5 9.0 15.0 55 71 67 75 4 47.5 38.0 2.5 6 9.0 17.0 22 36 31 37 3 37.5 30.5 2.0 5 9.0 15.0 58 78 70 78 4 52.5 42.0 2.5 6 9.0 18.0 24 39 33 39 3 40.0 33.0 2.0 5 9.0 15.0 60 80 72 80 4 52.5 42.0 2.5 6 9.0 18.0 25 39 34 40 3 40.0 33.0 2.0 5 9.0 15.0 63 83 75 83 4 52.5 42.0 2.5 6 9.0 18.0 28 42 37 43 3 42.5 35.5 2.0 5 9.0 15.0 65 85 77 85 4 52.5 42.0 2.5 6 9.0 18.0 30 44 39 45 3 42.5 35.5 2.0 5 9.0 15.0 68 87 81 90 4 52.5 41.5 2.5 7 9.0 18.5 32 46 42 48 3 42.5 35.5 2.0 5 9.0 15.0 70 90 83 92 4 60.0 48.5 2.5 7 9.0 19.0 33 47 42 48 3 42.5 35.5 2.0 5 9.0 15.0 75 99 88 97 4 60.0 48.5 2.5 7 9.0 19.0 35 49 44 50 3 42.5 35.5 2.0 5 9.0 15.0 80 104 95 105 4 60.0 48.5 3.0 7 9.0 19.0 38 54 49 56 4 45.0 37.0 2.0 6 9.0 16.0 85 109 100 110 4 60.0 48.5 3.0 7 9.0 19.0 40 56 51 58 4 45.0 37.0 2.0 6 9.0 16.0 90 114 105 115 4 65.0 52.0 3.0 7 9.0 20.5 43 59 54 61 4 45.0 37.0 2.0 6 9.0 16.0 95 119 110 120 4 65.0 52.0 3.0 7 9.0 20.5 45 61 56 63 4 45.0 37.0 2.0 6 9.0 16.0 100 124 115 125 4 65.0 52.0 3.0 7 9.0 20.5 Burgmann Mechanical Seals Design Manual 15.3 39 For plain shafts, rotating bellows MFL85N MFL85F Dimensions, item no’s and descriptions as for MFL85N, but with pumping screw (item no. 1.4). Dependent on direction of rotation! The pumping screw can be retrofitted. Single seal MFL85N Stationary seat alternative Balanced With vibration damper for optimum Independent running characteristics (important when – G16 of direction of rotation there is a risk of dry running). Metal bellows Item Part no. Description To EN 12756 to DIN 24250 Mechanical seals in the MFL series have 1.1 472/481 Seal face with a universal field of application. They are I1K is shorter than specified by EN designed for extreme ranges of tempera- bellows unit 12756 (MFL85N). ture and for high-viscosity media. There is 1.2 412.1 O-ring Unquoted dim. same as for G9. no dynamic O-ring and therefore a bel- 1.3 904 Set screw lows seal will never hang-up. (See page 2 475 Type G9 stationary 63 for details of the MFL65 stationary seat bellows seal.) 3 412.2 O-ring Operating limits MFL85GS d1 = 16 ... 100 mm 0.64" ... 4" Gas-lubricated seal faces. For applica- 1) p1 = with external pressurization tion options never thought possible before Vibration damper for type MFL85N 25 bar 360 PSI now. Same dimensions as MFL 85 N. with internal pressurization2) See page 72 for more details. <120 °C 10 bar 145 PSI <220 °C 5 bar 72 PSI Combination of materials vg = 20 m/s 66 ft/s Bellows: M - Inconel® 718 hardened, MFL85N: 6 2.4819 t = –40 ... +220 °C ® (–40 °F ... +428 °F) M5 - Hastelloy C Seal face: A, Q12 Torque transmission for type MFLWT80 MFLWT80: Stationary seat: Q1 t = –20 ... +400 °C Other metal parts: (–4 °F ... +752 °F) 1.4571, 1.4462, 1.3917, 2.4610 MFLCT 80: only A Q G M M/G MFLCT80: 1 6 t = –100 ... +100 °C (–148 °F ... +212 °F) 1) Higher pressures possible with special designs – please refer to Burgmann. 2) Positively retained stationary seat necessary. Execution in Hastelloy®C MFL WT/CT80 40 Burgmann Mechanical Seals Design Manual 15.3 MFLWT80/MFLCT80 Dimensions are not to EN 12756. Seal face positively driven to protect bellows from torsional stress. Secondary seals made of Burgmann Statotherm®. Item Part no. Description to DIN 24250 1.1 472/481 Seal face with bellows unit 1.2 410 Sealing ring 1.3 474 Drive collar 1.4 Socket head screw 1.5 904 Set screw MFL85N 2 475 Stationary seat 3 412 Sealing ring MFL85N/MFL85F MFLWT80/MFLCT80 2) d1 d3g d6 d7 d8 deg ds l1Kf l3n l5f l6 l8n l9g l18f l19 bf sn d3’ d3'’ d6’ d7’f d8’ l1’f l3’ l5’ l6’ l7’ l8’i l9’i f k mx 16 30.0 23 27 3 25.0 38 42.51) 32.5 1.5 4 17.5 10.0 – – 1.6 9.0 38 – 29.0 35.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 18 32.0 27 33 3 28.0 39 37.5 30.5 2.0 5 14.0 11.5 15.0 7.0 1.6 10.0 40 – 31.0 37.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 20 33.5 29 35 3 29.5 41 37.5 30.5 2.0 5 14.0 11.5 15.0 7.0 1.6 10.0 42 – 34.0 40.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 22 36.5 31 37 3 32.0 44 37.5 30.5 2.0 5 14.0 11.5 15.0 7.0 1.6 10.0 44 – 37.0 43.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 24 39.0 33 39 3 34.5 47 40.0 28.5 2.0 5 19.5 11.5 15.0 7.0 1.6 8.2 46 49.8 37.0 43.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 25 39.6 34 40 3 35.5 48 40.0 28.5 2.0 5 19.5 11.5 15.0 7.0 1.6 8.5 47 51.7 39.0 45.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M5 28 42.8 37 43 3 38.5 51 42.5 31.0 2.0 5 19.5 11.5 15.0 7.0 1.6 9.0 50 54.5 42.0 48.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M6 30 45.0 39 45 3 40.5 53 42.5 31.0 2.0 5 19.5 11.5 15.0 7.0 1.6 8.5 52 56.6 44.0 50.0 3 58.0 46.5 2.0 5 9 19.5 11.5 5 5 M6 32 46.0 42 48 3 42.0 55 42.5 31.0 2.0 5 19.5 11.5 15.0 7.0 1.6 9.2 54 59.5 49.0 56.0 4 60.5 46.5 2.0 6 9 22.0 14.0 5 5 M6 33 48.0 42 48 3 43.0 56 42.5 31.0 2.0 5 19.5 11.5 15.0 7.0 1.6 9.2 55 59.5 49.0 56.0 4 60.5 46.5 2.0 6 9 22.0 14.0 5 5 M6 35 49.2 44 50 3 45.5 58 42.5 31.0 2.0 5 19.5 11.5 15.0 7.0 1.6 9.5 57 62.5 51.0 58.0 4 60.5 46.5 2.0 6 9 22.0 14.0 5 5 M6 38 52.3 49 56 4 48.0 61 45.0 31.0 2.0 6 22.0 14.0 16.0 8.0 1.6 9.2 60 65.7 54.0 61.0 4 60.5 46.5 2.0 6 9 22.0 14.0 5 5 M6 40 55.5 51 58 4 50.0 64 45.0 31.0 2.0 6 22.0 14.0 16.0 8.0 1.6 9.2 66 65.7 56.0 63.0 4 61.5 47.5 2.0 6 9 22.0 14.0 5 6 M6 43 57.5 54 61 4 53.0 67 45.0 31.0 2.0 6 22.0 14.0 16.0 8.0 1.6 9.2 69 68.6 59.0 66.0 4 61.5 47.5 2.0 6 9 22.0 14.0 5 6 M6 45 58.7 56 63 4 55.0 69 45.0 31.0 2.0 6 22.0 14.0 16.0 8.0 1.6 9.5 71 71.5 62.0 70.0 4 62.5 47.5 2.5 6 9 23.0 15.0 5 6 M6 48 61.9 59 66 4 58.0 72 45.0 31.0 2.0 6 22.0 14.0 16.0 8.0 1.6 9.2 74 75.1 65.0 73.0 4 62.5 47.5 2.5 6 9 23.0 15.0 5 6 M6 50 65.0 62 70 4 60.5 74 47.5 32.5 2.5 6 23.0 15.0 17.0 9.5 1.6 10.5 76 76.1 67.0 75.0 4 62.5 47.5 2.5 6 9 23.0 15.0 5 6 M6 53 68.2 65 73 4 64.0 77 47.5 32.5 2.5 6 23.0 15.0 17.0 9.5 1.6 10.5 79 80.8 70.0 78.0 4 62.5 47.5 2.5 6 9 23.0 15.0 5 6 M6 55 70.0 67 75 4 65.5 80 47.5 32.5 2.5 6 23.0 15.0 17.0 9.5 1.6 10.0 81 80.8 72.0 80.0 4 62.5 47.5 2.5 6 9 23.0 15.0 5 6 M6 58 71.7 70 78 4 67.0 83 52.5 37.5 2.5 6 23.0 15.0 18.0 10.5 3.0 14.0 85 84.0 75.0 83.0 4 68.0 53.0 2.5 6 9 23.0 15.0 5 6 M6 60 74.6 72 80 4 69.5 85 52.5 37.5 2.5 6 23.0 15.0 18.0 10.5 3.0 14.0 87 92.3 77.0 85.0 4 68.0 53.0 2.5 6 9 23.0 15.0 6 6 M8 63 79.0 75 83 4 72.5 88 52.5 37.5 2.5 6 23.0 15.0 18.0 10.5 3.0 14.0 90 95.5 81.0 90.0 4 71.0 53.0 2.5 7 9 26.0 18.0 6 6 M8 65 84.1 77 85 4 78.0 95 52.5 37.5 2.5 6 23.0 15.0 18.0 10.5 3.0 14.0 92 95.5 83.0 92.0 4 71.0 53.0 2.5 7 9 26.0 18.0 6 6 M8 68 87.3 81 90 4 82.0 96 52.5 34.5 2.5 7 26.0 18.0 18.5 11.0 1.6 10.0 95 101.3 88.0 97.0 4 71.0 53.0 2.5 7 9 26.0 18.0 6 6 M8 70 87.3 83 92 4 81.0 96 60.0 42.0 2.5 7 26.0 18.0 19.0 11.5 3.0 17.0 97 101.3 88.0 97.0 4 71.0 53.0 2.5 7 9 26.0 18.0 6 6 M8 75 95.0 88 97 4 87.0 104 60.0 42.0 2.5 7 26.0 18.0 19.0 11.5 3.0 16.0 102 105.0 95.0 105.0 4 71.0 52.8 3.0 7 9 26.2 18.2 6 6 M8 80 98.4 95 105 4 91.0 109 60.0 41.8 3.0 7 26.2 18.2 19.0 11.5 3.0 16.0 107 110.6 100.0 110.0 4 71.0 52.8 3.0 7 9 26.2 18.2 6 6 M8 85 104.7 100 110 4 96.0 114 60.0 41.8 3.0 7 26.2 18.2 19.0 11.5 3.0 16.0 112 117.0 105.0 115.0 4 71.0 52.8 3.0 7 9 26.2 18.2 6 6 M8 90 111.0 105 115 4 103.0 119 65.0 46.8 3.0 7 26.2 18.2 20.5 13.0 3.0 21.0 117 120.2 110.0 120.0 4 71.0 53.8 3.0 7 9 25.2 17.2 6 6 M8 95 114.0 110 120 4 106.0 124 65.0 47.8 3.0 7 25.2 17.2 20.5 13.0 3.0 21.0 122 125.2 115.0 125.0 4 71.0 53.8 3.0 7 9 25.2 17.2 6 6 M8 100 117.4 115 125 4 111.0 129 65.0 47.8 3.0 7 25.2 17.2 20.5 13.0 3.0 20.0 127 130.2 122.2 134.3 5 74.0 54.0 3.0 9 11 30.0 20.0 6 6 M8 1) Installation length is longer than l1K specified by EN 12756 ® 2) d3'’ Executed in Hastelloy Burgmann Mechanical Seals Design Manual 15.3 41 For plain shafts, rotating spring HJ92N HJ977GN Item no’s and descriptions as for HJ92N, but with the seal face (Item No. 1.1) and the stationary seat (Item No. 2) made of silicon carbide and shrink-fitted. The stationary seat is type G46. Unquoted dimensions as for HJ92N. Single seal HJ92N Balanced Item Part no. Description Independent to DIN on direction of rotation 24250 Spring, product protected 1.1 472/473 Seal face (carbon graphite) To EN 12756 shrink-fitted into the Mechanical seals of the HJ series are seal face housing designed for media containing solids or 1.2 485 Drive collar with high viscosity e.g. sugar, paper, 1.3 412.2 O-ring sewage and waste water industry. The 1.4 412.1 O-ring springs are product protected. There is 1.5 477 Spring no sticking or clogging making the de- 1.6 904 Set screw sign rugged and reliable. 2 475 Stationary seat (type G16) Operating limits (see note on page 1) 3 412.3 O-ring d1 = 18 ... 100 mm m0.625" ... 4" *) 11 ... 360 PSI p1 = 0.8 ... 25 bar m Combination of materials and seal types HJ92N: t = –50 ... +220 °C Rotating Stationary seats = –58 °F ... +430 °F unit vg = 20 m/s m66 ft/s (seal face G16 G46 material) HJ 977 GN: V; Q1 Q12 t = –20 ... +180 °C 2) = –4 °F ... +356 °F HJ92 (A; B1) HJ92N HJ927GN 33 ft/s 1) vg = 10 m/s m HJ97G (Q12) HJ97GN5 HJ977GN *) An integral stationary seat lock is not 1) Installation length l12 is shorter than l1K needed within the permissible low pres- 2) sure range. For prolonged operation un- Installation length l11 is longer than l1K der vacuum it is necessary to arrange All material designations to EN 12756. for quenching on the atmospheric side. See inside the back cover of this manual. Axial movement 0.5 mm. 42 Burgmann Mechanical Seals Design Manual 15.3 Special design (example) Special design HJ42 SHJ97G Mechanical seal in the HJ series with HJ92N For use in sterile processes. With product-protected multiple springs, for smooth surfaces (electropolishing on applications involving operating pressu- request) specially designed O-ring groo- res of up to 50 bar. ves for special elastomeric seal-rings Please contact us for details of dimen- and O-rings bearing no gaps, plus many sions. other features. Also available as SHJ92 design. Please enquire for details. 1) 2) d1 d3 d6 d7 d8 dmf l1K l3n l5f l6 l7 l8g l20 l11 l12 l13f l18f l19 fn mx 18 32 27 33 3 26.0 37.5 30.5 2.0 5 9 15.0 7.0 39.5 35.5 28.5 17.0 9.0 3.0 M4 20 34 29 35 3 28.0 37.5 30.5 2.0 5 9 15.0 7.0 39.5 35.5 28.5 17.0 9.0 3.0 M4 22 36 31 37 3 30.0 37.5 30.5 2.0 5 9 15.0 7.0 39.5 35.5 28.5 17.0 9.0 3.0 M4 24 38 33 39 3 32.5 40.0 33.0 2.0 5 9 15.0 7.0 42.0 38.0 31.0 17.0 9.0 3.5 M5 25 39 34 40 3 33.5 40.0 33.0 2.0 5 9 15.0 7.0 42.0 38.0 31.0 17.0 9.0 3.5 M5 28 42 37 43 3 36.5 42.5 35.5 2.0 5 9 15.0 7.0 45.0 40.0 33.0 17.5 9.5 3.5 M5 30 44 39 45 3 38.5 42.5 35.5 2.0 5 9 15.0 7.0 45.0 40.0 33.0 17.5 9.5 3.5 M5 32 47 42 48 3 41.5 42.5 35.5 2.0 5 9 15.0 7.0 45.0 40.0 33.0 17.5 9.5 3.5 M5 33 47 42 48 3 41.5 42.5 35.5 2.0 5 9 15.0 7.0 45.0 40.0 33.0 17.5 9.5 3.5 M5 35 49 44 50 3 43.5 42.5 35.5 2.0 5 9 15.0 7.0 45.0 40.0 33.0 17.5 9.5 3.5 M5 38 54 49 56 4 47.5 45.0 37.0 2.0 6 9 16.0 8.0 47.5 42.5 34.5 18.5 10.5 4.0 M5 40 56 51 58 4 49.5 45.0 37.0 2.0 6 9 16.0 8.0 47.5 42.5 34.5 18.5 10.5 4.0 M5 43 59 54 61 4 52.5 45.0 37.0 2.0 6 9 16.0 8.0 47.5 42.5 34.5 18.5 10.5 4.0 M5 45 61 56 63 4 54.5 45.0 37.0 2.0 6 9 16.0 8.0 47.5 42.5 34.5 18.5 10.5 4.0 M5 48 64 59 66 4 57.5 45.0 37.0 2.0 6 9 16.0 8.0 47.5 42.5 34.5 18.5 10.5 4.0 M5 50 66 62 70 4 59.5 47.5 38.0 2.5 6 9 17.0 9.5 50.0 45.0 35.5 19.5 12.0 4.5 M6 53 69 65 73 4 62.5 47.5 38.0 2.5 6 9 17.0 9.5 50.0 45.0 35.5 19.5 12.0 4.5 M6 55 71 67 75 4 64.5 47.5 38.0 2.5 6 9 17.0 9.5 50.0 45.0 35.5 19.5 12.0 4.5 M6 58 78 70 78 4 68.5 52.5 42.0 2.5 6 9 18.0 10.5 55.0 50.0 39.5 20.5 13.0 4.5 M6 60 80 72 80 4 70.5 52.5 42.0 2.5 6 9 18.0 10.5 55.0 50.0 39.5 20.5 13.0 4.5 M6 63 83 75 83 4 73.5 52.5 42.0 2.5 6 9 18.0 10.5 55.0 50.0 39.5 20.5 13.0 4.5 M6 65 85 77 85 4 75.5 52.5 42.0 2.5 6 9 18.0 10.5 55.0 50.0 39.5 20.5 13.0 4.5 M6 68 88 81 90 4 78.5 52.5 41.5 2.5 7 9 18.5 11.0 55.0 50.0 39.0 21.0 13.5 4.5 M6 70 90 83 92 4 80.5 60.0 48.5 2.5 7 9 19.0 11.5 62.5 57.5 46.0 21.5 14.0 5.0 M6 75 99 88 97 4 89.0 60.0 48.5 2.5 7 9 19.0 11.5 62.5 57.5 46.0 21.5 14.0 5.5 M8 80 104 95 105 4 94.0 60.0 48.5 3.0 7 9 19.0 11.5 62.5 57.5 46.0 21.5 14.0 5.5 M8 85 109 100 110 4 99.0 60.0 48.5 3.0 7 9 19.0 11.5 62.5 57.5 46.0 21.5 14.0 5.5 M8 90 114 105 115 4 104.0 65.0 52.0 3.0 7 9 20.5 13.0 67.5 62.5 49.5 23.0 15.5 5.5 M8 95 119 110 120 4 109.0 65.0 52.0 3.0 7 9 20.5 13.0 67.5 62.5 49.5 23.0 15.5 5.5 M8 100 124 115 125 4 114.0 65.0 52.0 3.0 7 9 20.5 13.0 67.5 62.5 49.5 23.0 15.5 5.5 M8 Burgmann Mechanical Seals Design Manual 15.3 43 For stepped shafts, rotating spring H12N H17GN Dimensions, item no’s and descriptions as for H12N, but with the seal face (carbide) shrink-fitted into the seal face housing (Item no. 1.1). Single seal H12N Stationary seat alternative Balanced Item Part no. Description Conical spring to DIN G115G115 Dependent 24250 on direction of rotation 1.1 472/473 Seal face (carbon graphite) To EN 12756 shrink-fitted into the Mechanical seals of the H12N series seal face housing are a cost effective version of a balan- 1.2 412.1 O-ring The H12N is delivered with a type G9 ced seal. They feature the same rugged 1.3 474 Thrust ring stationary seat. Especially for hot water and reliable construction as the unba- 1.4 478 Righthand spring applications the type G115 for seat lanced spring seals (see M3 pages 28 1.4 479 Lefthand spring cooling is available. In this case, the and 29) in the Burgmann range. These 2 475 Type G9 stationary seat dimensions of the H12N rotating unit seals are primarily used in the chemical 3 412.2 O-ring are modified. Please ask about seal sector and in water pumps. designation H127G115. Combination of materials Operating limits (see note on page 1) and seal types d = 10 ... 80 mm m0.4" ... 3.125" 1 Rotating unit G9 stationary seats p1 = 25 bar m360 PSI H12N: SVQ1 AB t = –80 ... +220 °C (Q2) = –175 °F ... +430 °F H12N (A) –– H17GN: t = –20 ... +180 °C H17GN (Q12)– – = –4 °F ... +356 °F vg = 15 m/s m50 ft/s Axial movement 1.0 mm 44 Burgmann Mechanical Seals Design Manual 15.3 H12N id1 d2 d3 d6 d7 d8 db l1N l1g l2 l3g l5 l6 l7f l8g l9g b2) 10 14 24 17 21 3 18 50 35.5 18 25.5 1.5 4 8.5 17.5 10.0 8.0 12 16 26 19 23 3 21 50 36.5 18 26.5 1.5 4 8.5 17.5 10.0 8.0 14 18 31 21 25 3 23 55 39.5 18 29.5 1.5 4 8.5 17.5 10.0 8.0 16 20 34 23 27 3 26 55 41.0 18 31.0 1.5 4 8.5 17.5 10.0 8.0 18 22 36 27 33 3 28 55 44.0 20 32.5 2.0 5 9.0 19.5 11.5 8.0 20 24 38 29 35 3 30 60 44.0 20 32.5 2.0 5 9.0 19.5 11.5 8.0 22 26 40 31 37 3 31 60 44.0 20 32.5 2.0 5 9.0 19.5 11.5 8.0 24 28 42 33 39 3 35 60 44.0 20 32.5 2.0 5 9.0 19.5 11.5 8.0 25 30 44 34 40 3 37 60 45.0 20 33.5 2.0 5 9.0 19.5 11.5 8.0 28 33 47 37 43 3 40 65 47.0 20 35.5 2.0 5 9.0 19.5 11.5 8.0 30 35 49 39 45 3 43 65 47.0 20 35.5 2.0 5 9.0 19.5 11.5 8.0 32 38 54 42 48 3 45 65 51.0 20 39.5 2.0 5 9.0 19.5 11.5 7.5 33 38 54 42 48 3 45 65 51.0 20 39.5 2.0 5 9.0 19.5 11.5 7.5 35 40 56 44 50 3 49 65 55.0 20 43.5 2.0 5 9.0 19.5 11.5 8.0 38 43 59 49 56 4 52 75 60.0 23 46.0 2.0 6 9.0 22.0 14.0 7.5 40 45 61 51 58 4 55 75 62.0 23 48.0 2.0 6 9.0 22.0 14.0 8.0 43 48 64 54 61 4 58 75 65.0 23 51.0 2.0 6 9.0 22.0 14.0 8.0 45 50 66 56 63 4 61 75 69.0 23 55.0 2.0 6 9.0 22.0 14.0 (8) 48 53 69 59 66 4 64 85 69.0 23 55.0 2.0 6 9.0 22.0 14.0 8.0 50 55 71 62 70 4 66 85 73.0 25 58.0 2.5 6 9.0 23.0 15.0 8.0 53 58 78 65 73 4 69 85 75.0 25 60.0 2.5 6 9.0 23.0 15.0 8.0 55 60 79 67 75 4 71 85 75.0 25 60.0 2.5 6 9.0 23.0 15.0 8.0 58 63 83 70 78 4 74 85 75.0 25 60.0 2.5 6 9.0 23.0 15.0 8.0 60 65 85 72 80 4 77 95 75.0 25 60.0 2.5 6 9.0 23.0 15.0 8.0 63 68 88 75 83 4 80 95 75.0 25 60.0 2.5 6 9.0 23.0 15.0 8.0 65 70 90 77 85 4 83 95 76.0 25 61.0 2.5 6 9.0 23.0 15.0 10.0 681) 70 75 98 83 92 4 88 95 81.0 28 63.0 2.5 7 9.0 26.0 18.0 10.0 75 80 103 88 97 4 93 105 86.0 28 68.0 2.5 7 9.0 26.0 18.0 10.0 80 85 109 95 105 4 98 105 86.0 28 68.0 3.0 7 9.0 26.2 18.2 10.0 1)No provision for balanced type to DIN 2)Figure in brackets means installation length is longer than L1N specified by EN 12756. Burgmann Mechanical Seals Design Manual 15.3 45 For stepped shafts, rotating spring H7N Stationary seat alternative l 40 a 4,1 h1 G115 ) ) 4 3 k e h2 l39 The standard H7N range only features the stationary seat with the G9 shape. It 1) can be combined with the stationary seat d1 > 100: 2 mm x 30 2) G115 specifically for hot water application d1 > 100: 30 3) d1 > 100: +0,1 (cooling of the seat). Example of descrip- 4) d1 > 100: H7 tion: H75G 115/d1 (vg = 20 m/s max.). Single seal H7N Torque transmission Balanced Single spring (d1 max. 100 mm) Independent For d > 100 mm: via 4 set screws Axial movement: 2 of direction of rotation with cone points (standard arrange- d1 up to 22 mm: 1.0 mm To EN 12756* ment) 4 screws each d1 24 to 58 mm: 1.5 mm offset 90¡ The H7N mechanical seal range is de- d1 60 mm and above: 2.0 mm signed for universal application and the interchangeable parts concept is ideal for Item Part no. Description stock rationalisation. The seal faces are to DIN loosley inserted and can be easily ex- 24250 changed, the thrust ring is retained by the 1.1 472 Seal face drive lugs preventing the springs falling 1.2 485 Drive collar out. New: H7N with Super-Sinus spring Torque transmission by key is possible 1.3 474 Thrust ring for all types in the H7 range (no item (see page 139). 1.4 412.1 O-ring no. 1.6). Seal code e.g. H7S2/d1 1.5 477 Spring Operating limits (see note on page 1) 1.6 904 Set screw 2 475 Stationary seat d1 = 14 ... 200 mm m0.55” ... 8” *) 3 412.2 O-ring p1 = 25 (40) bar m360 (580) PSI t = –50 ... 220 °C m–58 °F ... 430 °F Drive key Combination of materials Passfeder vg = 20 m/s m66 ft/s DIN 6885 mmmmmmStationary seats *) With a shrink-fitted carbon graphite Seal faces seal face (A), a stationary seat in Q1, se- –G9 –G115 condary seals made of V, P (90 Shore) or E (80 Shore), and a product temperature A, B mQ mQ Q of a maximum 100 °C, the pressure ope- 2 1 12 rating limits are as shown in the graph: A*) – Q1 – Q2 – V –– – S –– – Pressure p (bar) *) only in the shrink-fitted version for H75N, H76N, H75G16 d1 (mm) 46 Burgmann Mechanical Seals Design Manual 15.3 H75 H76 H7F d = 28 ... 200 mm d1 = 14 ... 100 mm d1 max.100 mm 1 H7N As H7N, but with multiple springs in Dimensions, item no’s and descriptions sleeves (Item no. 1.5) axial movements as for H7N, but with special single H75F 2 to 4 mm, dependent on diameter. spring (Item no. 1.5) for compensating d1 = 28 ... 200 mm large axial movements ( 4 mm). Axial movement d1028...055= 2 mm. H75VN d1 058...100= 3 mm. Same as H75 but with a solid carbon d1 105...200 = 4 mm. seal face. Certified in accordance with Item no’s and descriptions as for H7N, API 682 for use in volatile hydrocar- but with pumping screw. Dependent on bons. Meets the requirements for ”Low direction of rotation! Emission Seals“ based on American Unquoted dimensions as for H7N. STLE limit values. d1f d2 d3 d6f d7f d8 d24 d31f d32f ds l1Kf l1N l2 l3m l5f l6 l7f l8n l9n l39f l40f am b en fn h1 h2 k mxi pmax. ts 14* 18 33 21.0 25.0 3 20 – – 38 42.5 – 18 32.5 1.5 4 8.5 17.5 10.0 – – – 5 – 6.0 – – – M5 9 1.1 16* 20 35 23.0 27.0 3 22 – – 40 42.5 – 18 32.5 1.5 4 8.5 17.5 10.0 – – – 5 – 6.0 – – – M5 9 1.1 18* 22 37 27.0 33.0 3 24 – – 42 45.0 55 20 33.5 2.0 5 9.0 19.5 11.5 – – – 6 – 7.0 – – – M5 9 1.5 20* 24 39 29.0 35.0 3 26 – – 44 45.0 60 20 33.5 2.0 5 9.0 19.5 11.5 – – – 6 – 5.5 – – – M5 9 1.5 22* 26 41 31.0 37.0 3 28 – – 45 45.0 60 20 33.5 2.0 5 9.0 19.5 11.5 – – – 6 – 8.0 – – – M5 9 1.5 24* 28 43 33.0 39.0 3 30 – – 47 47.5 60 20 36.0 2.0 5 9.0 19.5 11.5 – – – 6 – 5.5 – – – M6 9 1.5 25* 30 45 34.0 40.0 3 32 – – 49 47.5 60 20 36.0 2.0 5 9.0 19.5 11.5 – – – 6 – 5.5 – – – M6 9 1.5 28* 33 48 37.0 43.0 3 35 44.65 50.57 51 50.0 65 20 38.5 2.0 5 9.0 19.5 11.5 24.0 8.5 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 30* 35 50 39.0 45.0 3 37 47.83 53.75 54 50.0 65 20 38.5 2.0 5 9.0 19.5 11.5 24.5 9.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 32* 38 55 42.0 48.0 3 40 47.83 53.75 59 50.0 65 20 38.5 2.0 5 9.0 19.5 11.5 24.5 9.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 33* 38 55 42.0 48.0 3 40 47.83 53.75 59 50.0 65 20 38.5 2.0 5 9.0 19.5 11.5 24.5 9.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 35* 40 57 44.0 50.0 3 42 51.00 56.92 61 50.0 65 20 38.5 2.0 5 9.0 19.5 11.5 24.5 9.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 38* 43 60 49.0 56.0 4 45 54.18 60.10 65 52.5 75 23 38.5 2.0 6 9.0 22.0 14.0 26.0 11.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 40* 45 62 51.0 58.0 4 47 60.53 66.45 66 52.5 75 23 38.5 2.0 6 9.0 22.0 14.0 26.0 11.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 43* 48 65 54.0 61.0 4 50 63.70 69.62 69 52.5 75 23 38.5 2.0 6 9.0 22.0 14.0 26.0 11.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 45* 50 67 56.0 63.0 4 52 63.70 69.62 71 52.5 75 23 38.5 2.0 6 9.0 22.0 14.0 26.0 11.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 48* 53 70 59.0 66.0 4 55 66.88 72.80 75 52.5 85 23 38.5 2.0 6 9.0 22.0 14.0 26.0 11.0 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 50* 55 72 62.0 70.0 4 57 70.05 75.97 76 57.5 85 25 42.5 2.5 6 9.0 23.0 15.0 26.5 12.5 24.0 6 8.0 8.0 6.6 22.6 9 M6 12 1.5 53* 58 79 65.0 73.0 4 60 76.40 82.32 83 57.5 85 25 42.5 2.5 6 9.0 23.0 15.0 26.5 12.5 24.0 8 8.0 9.0 6.6 22.6 9 M8 11 1.9 55* 60 81 67.0 75.0 4 62 76.40 82.32 85 57.5 85 25 42.5 2.5 6 9.0 23.0 15.0 28.5 12.5 26.0 8 8.0 9.0 6.6 24.6 11 M8 12 1.9 58* 63 84 70.0 78.0 4 65 79.58 85.50 88 62.5 85 25 47.5 2.5 6 9.0 23.0 15.0 28.5 12.5 26.0 8 8.0 9.0 6.6 24.6 11 M8 15 1.9 60* 65 86 72.0 80.0 4 67 82.75 88.67 95 62.5 95 25 47.5 2.5 6 9.0 23.0 15.0 28.5 12.5 26.0 8 8.0 9.0 6.6 24.6 11 M8 15 1.9 63* 68 89 75.0 83.0 4 70 85.93 91.85 93 62.5 95 25 47.5 2.5 6 9.0 23.0 15.0 28.5 12.5 26.0 8 8.0 9.0 6.6 24.6 11 M8 14 1.9 65* 70 91 77.0 85.0 4 72 85.93 91.85 95 62.5 95 25 47.5 2.5 6 9.0 23.0 15.0 28.5 12.5 26.0 8 8.0 9.0 6.6 24.6 11 M8 15 1.9 70* 75 99 83.0 92.0 4 77 89.10 95.02 105 70.0 95 28 52.0 2.5 7 9.0 26.0 18.0 30.5 14.5 26.0 8 8.0 10.0 6.6 24.6 11 M8 15 1.9 75* 80 104 88.0 97.0 4 82 98.63 104.55 109 70.0 105 28 52.0 2.5 7 9.0 26.0 18.0 30.5 14.5 26.0 8 8.0 10.0 6.6 24.6 11 M8 15 1.9 80* 85 109 95.0 105.0 4 87 101.80 107.72 114 70.0 105 28 51.8 3.0 7 9.0 26.2 18.2 30.2 14.0 26.0 8 8.0 10.0 6.6 24.6 11 M8 15 1.9 85* 90 114 100.0 110.0 4 92 108.15 114.07 119 75.0 105 28 56.8 3.0 7 9.0 26.2 18.2 30.2 14.0 26.0 10 8.0 10.0 6.6 24.6 11 M8 23 2.3 90* 95 119 105.0 115.0 4 97 114.50 120.42 124 75.0 105 28 56.8 3.0 7 9.0 26.2 18.2 30.2 14.0 26.0 10 8.0 10.0 6.6 24.6 11 M8 23 2.3 95* 100 124 110.0 120.0 4 102 117.68 123.60 129 75.0 105 28 57.8 3.0 7 9.0 25.2 17.2 29.2 14.0 26.0 10 8.0 10.0 6.6 24.6 11 M8 23 2.3 100* 105 129 115.0 125.0 4 107 124.03 129.95 134 75.0 105 28 57.8 3.0 7 9.0 25.2 17.2 29.2 14.0 26.0 10 8.0 10.0 6.6 24.6 11 M8 23 2.3 105* 115 148 122.2 134.3 5 118 128.98 134.90 153 73.0 – 32 53.0 2.0 10 – 30.0 20.0 29.2 15.2 26.0 10 8.0 10.0 6.6 24.6 11 M8 18 2.3 110* 120 153 128.2 140.3 5 123 135.30 141.20 158 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 115* 125 158 136.2 148.3 5 128 140.30 146.20 163 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 120* 130 163 138.2 150.3 5 133 145.30 151.20 168 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 125* 135 168 142.2 154.3 5 138 150.30 156.20 173 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 130* 140 173 146.2 158.3 5 143 155.30 161.20 178 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 135* 145 178 152.2 164.3 5 148 160.30 166.20 183 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 140* 150 183 156.2 168.3 5 153 165.30 171.20 188 73.0 – 32 53.0 2.0 10 – 30.0 20.0 32.5 14.5 30.0 10 9.5 10.0 6.6 28.6 13 M8 18 2.3 145* 155 191 161.2 173.3 5 158 172.30 178.20 196 83.0 – 34 63.0 2.0 10 – 30.0 20.0 34.5 16.5 32.0 12 10.0 12.0 7.1 30.1 14 M8 22 2.1 150* 160 196 168.2 180.3 5 163 177.30 183.20 201 85.0 – 36 63.0 2.0 10 – 32.0 22.0 34.5 16.5 32.0 12 10.0 12.0 7.1 30.1 14 M8 22 2.1 155* 165 201 173.2 185.3 5 168 182.30 188.20 206 87.0 – 38 63.0 2.0 12 – 34.0 24.0 34.5 16.5 32.0 12 10.0 12.0 7.1 30.1 14 M8 22 2.1 160* 170 206 178.2 190.3 5 173 187.30 193.20 211 87.0 – 38 63.0 2.0 12 – 34.0 24.0 34.5 16.5 32.0 12 10.0 12.0 7.1 30.1 14 M8 22 2.1 165* 175 211 183.2 195.3 5 178 192.30 198.20 216 87.0 – 38 63.0 2.0 12 – 34.0 24.0 34.5 16.5 32.0 12 10.0 12.0 7.1 30.1 14 M8 22 2.1 170* 180 216 188.2 200.3 5 183 197.30 203.20 221 87.0 – 38 63.0 2.0 12 – 34.0 24.0 37.0 16.5 34.5 12 10.0 12.0 7.1 32.1 16 M8 22 2.1 175* 185 221 193.2 205.3 5 188 202.30 208.20 226 87.0 – 38 63.0 2.0 12 – 34.0 24.0 37.0 16.5 34.5 12 10.0 12.0 7.1 32.1 16 M8 22 2.1 180* 190 226 207.5 219.3 5 193 207.30 213.20 231 91.0 – 42 63.0 2.0 12 – 38.0 28.0 37.0 16.5 34.5 12 10.0 12.0 7.1 32.1 16 M8 22 2.1 185* 195 231 212.5 224.3 5 198 212.30 218.20 236 91.0 – 42 63.0 2.0 12 – 38.0 28.0 37.0 16.5 34.5 12 10.0 12.0 7.1 32.1 16 M8 22 2.1 190* 200 236 217.5 229.3 5 203 217.30 223.20 241 91.0 – 42 63.0 2.0 12 – 38.0 28.0 37.0 16.5 34.5 12 10.0 12.0 7.1 32.1 16 M8 22 2.1 195* 205 245 222.5 234.2 5 208 225.30 231.20 250 94.0 – 43 66.0 2.0 12 – 38.0 28.0 37.0 17.5 34.5 12 10.0 14.0 7.1 32.1 16 M10 22 2.1 200* 210 250 227.5 239.3 5 213 230.30 236.20 255 94.0 – 43 66.0 2.0 12 – 38.0 28.0 37.0 17.5 34.5 12 10.0 14.0 7.1 32.1 16 M10 22 2.1 Burgmann Mechanical Seals Design Manual 15.3 47 For stepped shafts, rotating spring H74-D ) ) 3 4 1) d1 > 100: 2 mm x 30° 2) d1 > 100: 30° 3) d1 > 100: H7 4) d1 > 100: +0,1 Double seal H74-D Torque transmission Balanced Item Part no. Description no. to DIN Independent d2 м105 mm: via 4 set screws of direction of rotation 24250 with cone points (standard arrange- 1.1 472.1 Seal face ment) Multiple springs 4 screws each 1.2 472.2 Seal face offset 90° Double seals of the M74-D series have 1.3 474 Thrust ring the same design-features as the “H7“ 1.4 485 Drive collar family of single seals (easy-to-replace 1.5 477 Spring seal faces, etc.). Apart from the installati- 1.6 904 Set screw on length of the drive collar, all fitting 1.7 412.1 O-ring dimensions (d1 <100 mm) conform with 1.8 412.2 O-ring EN 12756. Operating limits 2 475.1 Stationary seat 3 412.3 O-ring Operating limits (see note on page 1) 4 475.2 Stationary seat 5 412.4 O-ring d1 = 14 ... 200 mm 0.55" ... 8" p = 25 (40) bar 360 (580) PSI 1 Combination of materials t = –50 ... 220 °C –58 °F ... 430 °F = (–20 ... 180 °C) –4 °F ... 355 °F Dimensions are identical throughout the vg = 20 m/s (10 m/s*) 66 (33) ft/s H7 series, so it is possible to use the *) Limit for shrink-fitted carbide seal faces same face materials as for type H7N (see page 46). with d1 м 105 mm Axial movement: d1 Ϲ100 mm 0.5 mm d1 >100 mm 2.0 mm Double seals to EN 12756 EN specifies single seals in a back-to- back arrangement. It is possible, there- fore, to choose from the following combi- nations: – unbalanced/unbalanced – (e.g. M7N/M7N) – balanced/balanced – (e.g. H7N/H7N) – unbalanced/balanced – (e.g. M7N/H7N) Please consult the single seal tables for dimensions. 48 Burgmann Mechanical Seals Design Manual 15.3 H74F-D Dimensions, item no’s and descriptions H74-D as for H74-D, but with a pumping screw (Item no. 1.4). Dependent on the direction of rotation! d1 d2 d3 d6f d7f d8 ds l1n l2 l3n l4n l5l l6 l7f l8n l9g l31f mx 14 18 33 21.0 25.0 3 – 73.0 18 53.0 26.5 1.5 4 8.5 17.5 10.0 17.0 M5 16 20 35 23.0 27.0 3 – 73.0 18 53.0 26.5 1.5 4 8.5 17.5 10.0 17.0 M5 18 22 37 27.0 33.0 3 42 76.0 20 53.0 26.5 2.0 5 9.0 19.5 11.5 17.0 M5 20 24 39 29.0 35.0 3 44 76.0 20 53.0 26.5 2.0 5 9.0 19.5 11.5 17.0 M5 22 26 41 31.0 37.0 3 45 76.0 20 53.0 26.5 2.0 5 9.0 19.5 11.5 17.0 M5 24 28 43 33.0 39.0 3 47 77.0 20 54.0 27.0 2.0 5 9.0 19.5 11.5 17.5 M6 25 30 45 34.0 40.0 3 49 77.0 20 54.0 27.0 2.0 5 9.0 19.5 11.5 17.5 M6 28 33 48 37.0 43.0 3 51 77.0 20 54.0 27.0 2.0 5 9.0 19.5 11.5 17.5 M6 30 35 50 39.0 45.0 3 54 77.0 20 54.0 27.0 2.0 5 9.0 19.5 11.5 17.5 M6 32 38 55 42.0 48.0 3 59 79.0 20 56.0 28.0 2.0 5 9.0 19.5 11.5 18.5 M6 33 38 55 42.0 48.0 3 59 79.0 20 56.0 28.0 2.0 5 9.0 19.5 11.5 18.5 M6 35 40 57 44.0 50.0 3 61 80.0 20 57.0 28.5 2.0 5 9.0 19.5 11.5 19.0 M6 38 43 60 49.0 56.0 4 65 85.0 23 57.0 28.5 2.0 6 9.0 22.0 14.0 19.0 M6 40 45 62 51.0 58.0 4 66 85.0 23 57.0 28.5 2.0 6 9.0 22.0 14.0 19.0 M6 43 48 65 54.0 61.0 4 69 85.0 23 57.0 28.5 2.0 6 9.0 22.0 14.0 19.0 M6 45 50 67 56.0 63.0 4 71 84.0 23 56.0 28.0 2.0 6 9.0 22.0 14.0 19.5 M6 48 53 70 59.0 66.0 4 75 84.0 23 56.0 28.0 2.0 6 9.0 22.0 14.0 19.5 M6 50 55 72 62.0 70.0 4 76 93.0 25 63.0 31.5 2.5 6 9.0 23.0 15.0 19.5 M6 53 58 79 65.0 73.0 4 83 97.0 25 67.0 33.5 2.5 6 9.0 23.0 15.0 23.5 M8 55 60 81 67.0 75.0 4 85 97.0 25 67.0 33.5 2.5 6 9.0 23.0 15.0 23.5 M8 58 63 84 70.0 78.0 4 88 104.0 25 74.0 37.0 2.5 6 9.0 23.0 15.0 24.5 M8 60 65 86 72.0 80.0 4 95 104.0 25 74.0 37.0 2.5 6 9.0 23.0 15.0 24.5 M8 63 68 89 75.0 83.0 4 93 109.0 25 79.0 39.5 2.5 6 9.0 23.0 15.0 24.5 M8 65 70 91 77.0 85.0 4 95 98.0 25 68.0 34.0 2.5 6 9.0 23.0 15.0 23.5 M8 70 75 99 83.0 92.0 4 105 112.5 28 76.4 38.2 2.5 7 9.0 26.0 18.0 25.5 M8 75 80 104 88.0 97.0 4 109 112.5 28 76.4 38.2 2.5 7 9.0 26.0 18.0 25.5 M8 80 85 109 95.0 105.0 4 114 112.5 28 76.0 38.0 3.0 7 9.0 26.2 18.2 25.0 M8 85 90 114 100.0 110.0 4 119 112.5 28 76.0 38.0 3.0 7 9.0 26.2 18.2 25.5 M8 90 95 119 105.0 115.0 4 124 112.5 28 76.0 38.0 3.0 7 9.0 26.2 18.2 25.0 M8 95 100 124 110.0 120.0 4 129 110.5 28 76.0 38.0 3.0 7 9.0 25.2 17.2 25.0 M8 100 105 129 115.0 125.0 4 134 110.5 28 76.0 38.0 3.0 7 9.0 25.2 17.2 25.5 M8 105 115 148 122.2 134.3 5 153 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 110 120 153 128.2 140.3 5 158 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 115 125 158 136.2 148.3 5 163 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 120 130 163 138.2 150.3 5 168 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 125 135 168 142.2 154.3 5 173 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 130 140 173 146.2 158.3 5 178 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 135 145 178 152.2 164.3 5 183 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 140 150 183 156.2 168.3 5 188 122.0 32 82.0 41.0 2.0 10 – 30.0 20.0 31.5 M8 145 155 191 161.2 173.3 5 196 133.0 34 93.0 46.5 2.0 10 – 30.0 20.0 35.5 M8 150 160 196 168.2 180.3 5 201 137.0 36 93.0 46.5 2.0 10 – 32.0 22.0 35.5 M8 155 165 201 173.2 185.3 5 206 141.0 38 93.0 46.5 2.0 12 – 34.0 24.0 35.5 M8 160 170 206 178.2 190.3 5 211 141.0 38 93.0 46.5 2.0 12 – 34.0 24.0 35.5 M8 165 175 211 183.2 195.3 5 216 141.0 38 93.0 46.5 2.0 12 – 34.0 24.0 35.5 M8 170 180 216 188.2 200.3 5 221 141.0 38 93.0 46.5 2.0 12 – 34.0 24.0 35.5 M8 175 185 221 193.2 205.3 5 226 141.0 38 93.0 46.5 2.0 12 – 34.0 24.0 35.5 M8 180 190 226 207.5 219.3 5 231 149.0 42 93.0 46.5 2.0 12 – 38.0 28.0 35.5 M8 185 195 231 212.5 224.3 5 236 149.0 42 93.0 46.5 2.0 12 – 38.0 28.0 35.5 M8 190 200 236 217.5 229.3 5 241 149.0 42 93.0 46.5 2.0 12 – 38.0 28.0 35.5 M8 195 205 245 222.5 234.3 5 250 151.0 43 95.0 47.5 2.0 12 – 38.0 28.0 – M10 200 210 250 227.5 239.3 5 255 151.0 43 95.0 47.5 2.0 12 – 38.0 28.0 – M10 Burgmann Mechanical Seals Design Manual 15.3 49 Rotating springs HGH Split or semisplit mechanical seals ... for time is sometimes money. If the sealing compartment does not leave sufficient space axially for mounting or replacing a seal, if no quick- changing devices are availab- le, or if a pump is operated without standby, mounting or dismountying a mechanical seal in case of an inspection or repair may cause expensi- ve downtimes. Whether they are used e. g. in turbines of hydroelectric plants, in pumps of seawater desalination plants, in stern tubes, gears, Semi-split HGH 201 defibrators or cooling water Balanced Unsplit as original equipment: pumps: split seal housings or Independent Description HGH 200. components can help you to of direction of rotation Item Description save costs. Single seal 1.1 Seal face2) Semi-split mechanical seals are used if 1.2 Driver collar there is a sufficient axial clearance to 1.3 O-ring pull off the seal housing and seat hou- 1.4 O-ring2) sings until the sliding parts are accessi- 1.5 Spring ble. i.e. only the wearing parts proper, 1.6 Set screw such as the seal face and stationary 2 Stationary seat2) seat as well as O-rings are split. The 3O-ring2) seal face and stationary seat, springs and O-rings can thus be replaced with- 2) For disassembly of unsplit seal faces, out requiring complete disassembly. seats and O-ring these should be broken Springs are arranged to be protected or cut. from the medium. The split stationary seat can be used in either side. Materials Combination of sliding materialas: Operating limits (see note on page 1) Q1 (silicon carbide) against Q1 1) B (carbon graphite) against Q d1 = 50 ... 310 mm 1 1 p1 = 25 (40) bar O-rings: t1 = 150 °C V (FPM, e.g. Viton®) vg = 20 m/s E(EPDM) Adm. axial offset Ȁ 2 mm P (NBR, e.g. Perbunan®) Torque transmission 1) Larger diameters on request. Other components: d1 м105 mm standard G (CrNi-Mo-steel, 1.4571) via 4 set screws with cone points 4 screws each offset 90° 50 Burgmann Mechanical Seals Design Manual 15.3 HGH 211 Unsplit as original equipment: Designa- tion HGH 210. Operating limits, item numbers with description and unquoted dimensions as offset for HGH 201. Item. 1.2 Driver collar, modified for securing on stepped shafts. HGH d1 d11 d2 d3 d4g d5g d6 l1n l11f l3 l33 l4n l8n Rf f mx 50 40 60 95 80.5 89.6 55 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 55 45 65 100 85.5 94.6 60 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 60 50 70 105 90.5 99.6 65 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 65 55 75 110 95.5 104.6 70 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 70 60 80 115 100.5 109.6 75 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 75 65 85 120 105.5 114.6 80 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 80 70 90 125 110.5 119.6 85 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 85 75 95 130 115.5 124.6 90 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 90 80 100 135 120.5 129.6 95 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 95 85 105 140 125.5 134.6 100 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 100 90 110 145 130.5 139.6 105 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 105 95 115 150 135.5 144.6 110 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 110 100 120 155 140.5 149.6 115 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 115 105 125 160 145.5 154.6 120 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 120 110 130 165 150.5 159.6 125 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 125 115 135 170 155.5 164.6 130 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 130 120 140 175 160.5 169.6 135 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 135 125 145 180 165.5 174.6 140 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 140 130 150 185 170.5 179.6 145 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 145 135 155 190 175.5 184.6 150 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 150 140 160 195 180.5 189.6 155 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 155 145 165 200 185.5 194.6 160 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 160 150 170 205 190.5 199.6 165 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 165 155 175 210 195.5 204.6 170 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 170 160 180 215 200.5 209.6 175 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 175 165 185 220 205.5 214.6 180 95.3 75.3 70 50 18.8 31.8 2.5 6 M8 180 170 192 225 212.5 224.6 185 104.2 84.2 72 52 26.4 38.0 3.5 6 M8 185 175 197 230 217.5 229.6 190 104.2 84.2 72 52 26.4 38.0 3.5 6 M8 190 180 202 235 222.5 234.6 195 104.2 84.2 72 52 26.4 38.0 3.5 6 M8 195 185 207 240 227.5 239.6 200 104.2 84.2 72 52 26.4 38.0 3.5 6 M8 200 190 212 245 232.5 244.6 205 104.2 84.2 72 52 26.4 38.0 3.5 6 M8 205 195 217 255 237.5 249.6 210 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 210 200 222 260 242.5 254.6 215 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 220 210 232 270 252.5 264.6 225 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 230 220 242 280 262.5 274.6 235 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 240 230 252 290 272.5 284.6 245 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 250 240 262 300 282.5 294.6 255 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 260 250 272 310 295.5 307.6 265 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 270 260 282 320 305.5 317.6 275 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 280 270 292 330 315.5 327.6 285 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 290 280 302 340 325.5 337.6 295 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 300 290 312 350 335.5 347.6 305 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 310 300 322 360 345.5 357.5 315 109.2 84.2 77 52 26.4 38.0 3.5 8 M10 Burgmann Mechanical Seals Design Manual 15.3 51 Rotating seat, stationary multiple springs HR l l3 l1 l4 +0,1 t1 8 d 1.3 1.2 1.4 1.1.1 1.1.5 1.6 h8 H8 – 0,1 H8 0 3 2 1h 1 9 1 4 d 11 d d d d d d 1.1.2 1.1.3 1.1.4 d N d HRZ1 Single seal with cylindrical spring and type G76 seat. For installation in covers with installation dimensions according to EN 12756 B or U. Installation length I11 corresponds to max. I1k. For dimensions see separate table at the bottom of page l5 l2 53 (intermediate sizes on request). Single seal HR1.. Rotating seat alternatives Independent Direction of installation: of direction of rotation – from the impeller side HR10 Balanced – from the bearing side HR11 Mechanical seals of the HR series are special-purpose seals for use in media Item Part no. Description containing solids without external flus- to DIN hing or product circulation. Key features 24250 are a rotating seat positioned immediate- 1.1.1 472 Seal face ly next to the pump impeller and a spring 1.1.2 412.1 O-ring 1.1.3 474 Thrust ring protection sleeve which has proven to be d 36 ... 90 mm: –G2 1.1.4 477 Spring N effective in actual service. HR mechani- 95 ... 200 mm: –G9 cal seals find application mainly in the 1.1.5 520 Sleeve scrubbing sections of power station flue 1.2 475 Rotating seattype G11 gas desulphurization systems, and they 1.3 412.2 O-ring are also used successfully in the paper 1.4 412.3 O-ring industry. 1.6 441 Housing Operating limits (see note on page 1) Materials dN = 36 ... 200 (400) mm High-wear-resistant and corrosion-proof = 1.4" ... 8" (16") silicon carbide is used exclusively as face 230 PSI seat material. p1 = 16 bar dN 35 ... 100 mm: –G71 t = –20 ... 160 °C –4 °F ... 320 °F (only for HRZ1) vg = 10 m/s 33 ft/s SHR Special model for use in sterile proces- ses. Electropolished surfaces, and spe- cially designed O-ring grooves for special elastomeric seal rings and O-rings leaving no gaps plus many other features, please enquire for details. 52 Burgmann Mechanical Seals Design Manual 15.3 HR2 ... HR3 ... HRK-D Cartridge-type single seal with guide sleeve (Item no. 2) Cartridge-type single seal. Insert Double seal of cartridge design for operation in buffer HR for use with quench. Insert (Item no. 1) either metallic or (Item no. 1) either metallic or SiC. pressure or quench mode (does not open if buffer SiC. pressure fails), available alternatively with a pumping screw for a higher rate of circulation. Torque transmis- sion e.g. by means of a shrink disk. +0,2 d1 d1h dN d2f d3i d4i d5 d6g d7g d8 d9 d10 d11 min lf l1i l2i l3l l4 l5b l6 l7 l9g k2s tn t1 20 28 36 47.1 64 75 46 56.0 63.0 4 70 38 40 75 53 20 19.5 17 10.5 6 9 8.0 51.0 4.5 3 25 33 41 52.1 69 80 51 62.0 70.0 4 75 43 45 75 53 20 19.5 17 10.5 6 9 9.5 56.5 4.5 3 28 38 46 57.1 74 85 56 67.0 75.0 4 80 48 50 75 53 20 19.5 17 10.5 6 9 9.5 61.5 4.5 3 33 43 51 62.1 79 90 61 72.0 80.0 4 85 53 55 75 53 20 19.5 17 10.5 6 9 10.5 66.5 4.5 3 38 48 56 67.1 84 95 66 77.0 85.0 4 90 58 60 75 53 20 19.5 17 10.5 6 9 10.5 71.5 4.5 3 43 53 61 72.1 89 100 69 81.0 90.0 4 95 63 65 75 53 20 19.5 17 10.5 7 9 11.0 75.0 4.5 3 48 58 66 77.1 94 105 76 88.0 97.0 4 100 68 70 75 53 20 19.5 17 10.5 7 9 11.5 82.0 4.5 3 53 63 71 82.1 100 110 81 95.0 105.0 4 105 73 75 75 53 20 19.5 17 10.5 7 9 11.5 88.0 4.5 3 55 65 75 87.1 105 115 86 100.0 110.0 4 110 78 79 75 53 20 19.5 17 10.5 7 9 11.5 93.0 4.5 3 60 70 80 92.1 110 120 91 105.0 115.0 4 115 83 84 75 53 20 19.5 17 10.5 7 9 13.0 98.0 4.5 3 65 75 85 97.1 115 125 96 110.0 120.0 4 120 88 89 75 53 20 19.5 17 10.5 7 9 13.0 103.0 4.5 3 70 80 90 102.1 120 130 101 115.0 125.0 4 125 93 94 75 53 20 19.5 17 10.5 7 9 13.0 108.0 4.5 3 75 85 95 107.1 125 135 107 122.2 134.3 5 130 98 99 75 53 20 19.5 17 10.5 10 12 20.0 114.5 7.0 3 80 90 100 112.1 130 140 107 122.2 134.3 5 135 103 104 75 53 20 19.5 17 10.5 10 12 20.0 114.5 7.0 3 90 100 110 126.1 146 163 117 136.2 148.3 5 155 117 116 98 73 30 22.0 19 16.0 10 12 20.0 126.5 7.0 4 100 110 120 136.1 156 173 132 146.2 158.3 5 165 127 126 98 73 30 22.0 19 16.0 10 12 20.0 139.0 7.0 4 110 120 130 145.1 166 183 142 156.2 168.3 5 175 136 136 98 73 30 22.0 19 16.0 10 12 20.0 149.0 7.0 4 120 130 140 154.1 176 193 152 168.2 180.3 5 185 145 146 98 73 30 22.0 19 16.0 10 12 22.0 160.0 7.0 4 130 140 150 163.9 187 203 162 178.2 190.3 5 195 155 156 98 73 30 22.0 19 16.0 12 12 24.0 170.0 7.0 4 140 150 160 174.9 188 213 172 188.2 200.3 5 205 166 166 98 73 30 22.0 19 16.0 12 12 24.0 180.0 7.0 4 160 170 180 193.9 219 238 187 212.5 224.3 5 230 185 186 98 73 30 22.0 19 16.0 12 12 28.0 199.5 7.0 4 180 190 200 213.9 239 265 207 232.8 244.3 5 255 205 206 98 73 30 22.0 19 16.0 12 12 30.0 219.5 7.0 4 Dimensions for shaft diameters up to 300 mm on request. HRZ1 dN d1h d1 d11 d12 d13 d14 l10f l11f l12i l13f l15 l16 35 33 20 56 42 48 30 57.7 49.2 15.0 42.7 2.0 5 43 39 27 67 54 61 40 57.7 49.2 15.0 42.7 2.0 6 54 50 35 78 65 73 40 59.8 52.1 15.5 44.3 2.5 6 66 60 47 91 77 85 40 66.0 58.0 16.5 49.5 2.5 6 77 72 55 103 88 97 40 74.5 66.0 17.5 57.0 2.5 7 100 90 70 125 110 120 40 82.0 73.0 21.0 61.0 3.0 7 Burgmann Mechanical Seals Design Manual 15.3 53 Stationary springs, rotating seat HRC ... N Variant HRC1100N Same design as HRC1000N, but with a shorter cover plate featuring integral spring and drive pin pockets (Item no. 8). No adapter (Item no. 9). Shaft sleeve (Item no. 2) uncoated. Differs from modu- lar system! Cartridge seal HRC1000N Optional features Balanced Single seal with spring protection sleeve for basic types within the modular sys- Independent Item Part no. Description tem. of direction of rotation no. to DIN To DIN 24960 C 24250 Mechanical seals of the HRC series were 1.1.1 472.1 Seal face developed specially for use in standard 1.1.2 474 Thrust ring chemical pumps. The radial and axial 1.1.3 477.1 Spring space has been optimized to provide ideal 1.2 475.1 Rotating seat conditions for maximum operational relia- 2 523 Shaft sleeve bility. The ingenious modular system al- 4 513 Insert Throttle ring (Item no. 13) for sealing lows the HRC to be adapted for a wide 8 160 Cover plate steam quench on the atmosphere side range of applications which enhances the 9 509 Spring carrier (for type HRC2000N). Item no. 15 adap- opportunities for your pumps. Perfect for 12 Spring protection ter; Item no. 16 locking ring. standardization purposes. sleeve Seal features: 19 Plug HRC-GS 3000 Springs protected from the product 24 Assembly fixture Double seal with gas-lubricated seal- and leakage ing faces. Installation dimensions Axial compensation of movement according to DIN 24960 C. See also Ȁ 1 mm page 60, 61. Very well suited for abrasive media and media containing solids. Operating limits (see note on page 1) Nominal diameter d10 = 30 ... 60 mm Nominal diameter d10 = 1.181"... 2.362" p1 = 25 bar 360 PSI t = –20 ... 160 (200*) °C = –4 °F ... 320 (382) °F vg = 20 m/s (66 ft) Materials Seal face: Q1; Q2 Rotating seat: A; Q1; Q2 *) due to shrinking 54 Burgmann Mechanical Seals Design Manual 15.3 HRC..N HRC2000N HRC3000NF A single seal with pressureless quench no. 15) and lip seal (Item no. 13) on the with pumping screw dependent on di- of pressure reversal), with guide sleeve for cooling, featuring guide sleeve (Item atmosphere side. rection of rotation. A double seal, dou- (Item no. 12), alternative insert as Item no. 12) baffle (Item no. 17), adapter (Item- ble pressure balanced (inboard seal does no. 4, and balanced mechanical seal on not open in the event of buffer pressure the atmosphere side (Item nos. 13.1, 13.2). failure; closes automatically in the event Operation as single seal with quench is possible. H7 +0,2 +0,2 h +0,1 +0,1 Ȁ0.05 H7 H7 +0,2 –0,2 +0,2 +0,5 8 +7 +0,1 –0,1 d10 d11 d12 d13 d14 d15 d16 d17 d18 d19 d20 d21 d22 l8 l9 l10 l11 l12 l13 l14 l15l16 l17 l18 l19 l20 l21 l22 l23 l24 l25 S 30 24 31 35 41 44 082 085 095 110 129 086 115 10 15 50442001 16 0.5 55 39 35 35 39 2 0.5 M10 40 32 41 45 51 54 092 095 11020 130 155 096 130 10 15 52442201 18 0.5 60 44 40 40 44 2 0.5 M12 50 42 51 55 61 66 105 110 125< d 145 168 111 140 12 15 55442501 21 0.5 60 44 45 45 44 2 0.5 M12 19 60 50 61 61 67 76 120 125 140d 160 185 126 166 14 20 70443001 26 0.5 60 44 50 50 44 2 0.5 M12 Seal stand-out Mechanical seal with stationary spring unit, design C. limit Example of The drawing shows a double mechanical seal. assembly fixture View Seal face Seat Mating surface Sealing surface rounded Mating surface 1) The axial position of the sealing surface of the secondary seals are determined by the dimension /13 of the pump. Burgmann Mechanical Seals Design Manual 15.3 55 Stationary springs, rotating seat Cartex® l 1 ° 4 45 5° l3 l2 A l4 a d 15 11 B B 14 a 1 s 7 6 5 4 1 2 3 8 9 10 3 h6 2 d d 1 d ° 4 45 5° Out In da 21 13 12 Werb Nr. 2766 22 In Out a 2 s Clockwise Anti clockwise shaft rotating shaft rotating Cartridge seal Cartex-SN Cartex-SNO Balanced Single seal with flushing connection (A) Single seal without connections, for Independent Item Description "dead-end" operation. of direction of rotation 1 Seal face l13 l12 ® l14 Cartex mechanical seals are fully pre- 2, 5, 7 O-ring asembled. They are balanced, can be used 3 Spring in either direction of rotation and come 4 Seat with all the connections you need for the 6 Shaft sleeve most common modes of operation. 8 Drive collar 9 Set screw Operating limits 10 Snap ring 11 Cover d1 = 25 ... 100 mm (1“ ... 4“) 12 Assembly fixture t = –40 ... +220 °C (remove after intallation) (check O-ring temperature resistance) 13 Screw p1, vg see diagramm below 14 Gasket p3 = 25 bar 15 Screw plug Cartex-QN/TN ∆p (p3 – p1) ... 25 bar 16 Radial seal (-QN), Single seal for operation with unpressuri- (1,5 ... 2 bar, 7 bar for buffer media with throttle ring (-TN) zed fluid quench. Same as "-SN' version poor lubrication characteristics recom- but with outboard lip seal (longer fitting mended) length). The cover has auxiliary connec- tions for flushing (A) and quench (B). The Axial movement max. ± 1.0 mm Cartex-TN version has a throttle ring (item from d1 = 75 ± 1.5 mm 17) made of carbon graphite or PTFE rein- Materials forced with carbon fiber. 25 l Face material Seal face: Q1, B1 15 combination carbon l17 l16 graphite / SiC Seat: Q1 20 SiC / SiC Components: G 15 Cartex-DN Springs: M 15 O-rings: V, E, K, U1, HNBR (bar) 12 1 p SiC / SiC Radial seal: P, T3 Throttle ring: T 8 12 16 10 15 vg (m/s) Pressure and sliding velocity measurements were taken using demineralized water. 56 Burgmann Mechanical Seals Design Manual 15.3 Cartex-DN Cartex-HDN l5 l7 ( l 6 ) Double seal, double pressure balanced (the seal remains clo- Double seal for sterile process applicati- l4 sed in case of buffer fluid pressure failure or reverse pressu- ons. Specially formed secondary seals eli- re); buffer fluid system required; integrated circulation system minate dead space on the inboard side. eliminates the need for an additional circulating device. EHEDG compliant; FDA approved materi- 8 If used as a double seal, a buffer fluid system will be required als; suitable for CIP/SIP applications. Can 14 20 (e.g. Burgmann TS 2000 - both seals are always internally also be used for quench operation up to pressurized). In tandem operation, the quenching fluid is, de- 0.5 bar max. pending on operating conditions, used in dead-end (API 610, p1 = 0.5...16 (25) bar Plan 51) or throughflow mode (API 610, Plan 52 or 54 - inbo- t = –20 ...140 (160) °C ard seal externally pressurized). v = 10 m/s. 7 6 5 4 1 2 11 3 10 9 12 13 15 16 17 g Item Description Item Description 1 Seal face 14 Drive collar 2, 5, 7, 10, 13, 15 16 Set screw Cartex O-ring 17 Snap ring 3 Spring 18 Assembly fixture 4 Seat (remove after 19 18 6 Shaft sleeve installation) 8 Cover 19 Hex socket head screw 9 Seal face 20 Gasket 11 Spring 22 Screw plug 12 Seat 23 Gasket d1 d2 d3min. d3max. l1 l2 l3 l4 l5 l6 l7 l12 l13 l14 l15 l16 l17 a1 a2 da s 25 43.0 44.0 51.5 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 62 62 105 13.2 28 46.0 47.0 52.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 62 65 105 13.2 30 48.0 49.0 56.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 65 67 105 13.2 32 49.8 51.0 57.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 67 70 108 13.2 33 49.8 51.0 57.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 67 70 108 13.2 35 53.0 54.0 61.5 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 70 72 113 13.2 38 56.0 57.0 66.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 75 75 123 13.2 40 58.0 59.0 68.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 75 77 123 14.2 42 60.5 61.5 69.5 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 80 80 133 14.2 43 60.5 61.5 70.5 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 80 80 133 14.2 45 62.5 64.0 73.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 81 82 138 14.2 48 65.6 67.0 75.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 84 85 138 14.2 50 68.0 69.0 78.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 87 87 148 14.2 53 72.0 73.0 87.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 97 97 148 18.0 55 73.0 74.0 83.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 90 92 148 18.0 60 78.0 79.0 91.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 102 102 157 18.0 65 84.8 85.7 98.5 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 109 109 163 18.0 70 93.0 95.0 108.0 67 42.4 24.6 25.4 86.5 53.4 33.1 35.0 32.0 17.5 79.5 53.4 26.1 118 118 178 18.0 75 100.0 101.6 118.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 129 129 190 18.0 80 106.4 108.0 124.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 135 135 195 18.0 85 109.5 111.1 128.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 139 139 198 22.0 90 115.9 117.5 135.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 145 145 205 22.0 95 119.1 120.7 138.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 148 148 208 22.0 100 125.4 127.0 144.0 84 57.4 26.6 28.0 108.0 63.9 44.1 46.1 37.9 22.0 – – – 154 154 218 22.0 1.000 1.693 1.750 2.000 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 2.440 2.440 4.134 0.520 1.125 1.811 1.875 2.050 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 2.440 2.560 4.134 0.520 1.712 1.750 Diameter for ANSI pumps, other dimensions unchanged. Order code: Cartex-SNOT, -SNT, -DNT. 1.250 1.960 2.000 2.250 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 2.640 2.760 4.330 0.520 1.375 2.086 2.125 2.420 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 2.750 2.840 4.449 0.520 1.960 2.000 Diameter for ANSI pumps, other dimensions unchanged. Order code: Cartex-SNOT, -SNT, -DNT. 1.500 2.200 2.250 2.625 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 2.950 2.950 4.842 0.520 1.625 2.340 2.375 2.700 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.030 3.090 4.842 0.599 1.750 2.460 2.500 2.812 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.190 3.230 5.433 0.599 1.875 2.582 2.625 2.940 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.190 3.350 5.433 0.599 2.000 2.677 2.750 3.190 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.430 3.430 5.827 0.599 2.125 2.834 2.875 3.437 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.820 3.820 5.827 0.709 2.250 2.960 3.000 3.560 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 3.940 3.940 6.181 0.709 2.375 3.070 3.125 3.590 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 4.020 4.020 6.181 0.709 2.500 3.212 3.250 3.800 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 4.170 4.180 6.417 0.709 2.625 3.338 3.375 3.937 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 4.290 4.300 6.417 0.709 2.750 3.660 3.750 4.250 2.640 1.669 0.969 1.000 3.400 2.102 1.303 1.378 1.260 0.689 3.130 2.102 1.028 4.650 4.660 7.008 0.709 2.875 3.811 3.875 4.567 3.307 2.260 1.047 1.000 4.250 2.516 1.736 1.815 1.492 0.866– – – 4.960 4.960 7.283 0.709 3.000 3.937 4.000 4.646 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.079 5.079 7.480 0.709 3.125 4.063 4.125 4.764 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.197 5.197 7.677 0.709 3.250 4.189 4.250 4.882 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.315 5.315 7.677 0.709 3.375 4.311 4.375 5.039 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.472 5.472 7.795 0.866 3.500 4.437 4.500 5.157 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.591 5.591 7.795 0.866 3.625 4.563 4.625 5.315 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.709 5.709 8.071 0.866 3.750 4.689 4.750 4.433 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 5.827 5.827 8.189 0.866 4.000 4.937 5.000 5.669 3.307 2.260 1.047 1.102 4.250 2.516 1.736 1.815 1.492 0.866– – – 6.063 6.063 8.583 0.866 Burgmann Mechanical Seals Design Manual 15.3 57 Rotating springs (bellows), for plain shafts Mtex® 45° l 45° 1 A l2 l3 a d B B a 1 s 3 7 2 6 1 15 16 4 58 9 11 12 3 2 1 d d d 2 1 15 Connections: 1/4“ NPT (d1 <38 mm) 3/8“ NPT (d1 >38 mm) 10 14 13 l4 Cartridge seal Mtex-QN Mtex-TN Balanced Single seal for liquid quench. Cover with Independent of direction outboard shaft seal and supply connec- of rotation tion for flush A and quench B Metal bellows Item Designation Mtex is a special type of cartridge seal for 1 Bellows unit pumps and applications in which tempe- 2, 5, 7 O-ring 9 rature plays an important role, e.g. in refi- 3, 11 Set screw neries and the petrochemical industry. Be 4 Seat it for the conversion of packings, retrofits 6 Shaft sleeve Single seal for steam quench. Cover with or original equipment, the Mtex concept is 8 Cover outboard throttle ring (Item 9). ideal for standardization projects. It fits in 9 Shaft seal Operating limits, dimensions same as for any centrifugal pump with a conventional 10 Drive collar Mtex-QN. stuffing box (generally without having to 12 Retaining ring modify any dimensions). The bellows unit 13 Assembly fixture has an amplitude limiter to guarantee 14 Hex socket head screw trouble-free running (important when 15 Gasket Mtex-QNM, Mtex-TNM there is any risk of dry running). 16 Screw plug *) Operating limits (see note on page 1) Materials Designations according to EN12756 d1 = 25 ... 80 mm Mtex-QN/-TN, Mtex-DN (inboard) t*) = –40 ... +250 (280: -DN) °C –40 ... +482 (536: -DN) °F Seal face A (carbon graphite) or Q (silicon carbide) B Δp (p3 - p1) = 10 bar (<120 °C) 1 Seat Q1 5 bar (<280 °C) ® recommended 1.5 ... 2 bar O-Ring V (FPM, e. g. Viton ) Single seals as described, but with multi- p = 27 bar E (EPDM) point injection ring in addition (Item B). 3 K (perfluorocarbon rubber) ® Bellows M6 (Inconel 718) 25 Components G /G (CrNiMo steel, A/Q1 (-QN/-TN/-DN) 1 Material combination Carbon graphite / SiC 1.4462, 1.4571) 20 Q1/Q1 (-DN) Throttle T12 (PTFE, carbon gra- phite reinforced) 15 12 Mtex-DN (outboard) Q1/Q1 (-QN/-TN) Combination of face materials 8 Seal face B (carbon graphite) Seat Q1 U2 (tungsten carbide) (bar) 1 ® p Spring M (Hastelloy C4) 10 15 vg (m/s) *) note operating limits of the O-rings 58 Burgmann Konstruktionsmappe 15.3 l 5 45° 45° l6 l7 Out In da 21 22 In Out a 2 s 3 2 7 6201 4 5 8 11 10 9 12 13 15 16 Clockwise Anti clockwise shaft rotating shaft rotating 1 d Connections: 1/4“ NPT (d1 <38 mm) 3/8“ NPT (d1 >38 mm) Mtex 17 14 18 19 l4 Mtex-DN d1 d2 d3min. d3max l1 l2 l3 l4 l5 l6 l7 da a1 s 25 45.0 47.0 51.0 79.5 26.1 53.4 25.4 87.0 33.6 53.4 105.0 62.0 13.2 Double seal, inboard rotating metal bel- 30 49.4 52.0 56.0 78.4 25.0 53.4 25.4 86.5 33.1 53.4 105.0 67.0 13.2 lows, outboard stationary O-ring seal. 32 52.3 54.5 57.0 78.4 25.0 53.4 25.4 86.5 33.1 53.4 108.0 70.0 13.2 With pumping device independent of 33 52.3 54.5 57.0 78.4 25.0 53.4 25.4 86.5 33.1 53.4 108.0 70.0 13.2 the direction of rotation, cover with sup- 35 54.8 58.0 61.5 78.4 25.0 53.4 25.4 86.5 33.1 53.4 113.0 72.0 13.2 38 57.5 60.0 66.0 78.4 25.0 53.4 25.4 86.5 33.1 53.4 123.0 75.0 14.0 ply connections for buffer medium or 40 58.8 62.0 68.0 78.2 24.8 53.4 25.4 86.3 32.9 53.4 123.0 77.0 14.2 quench and inboard flush. 43 61.9 64.5 70.5 78.4 25.0 53.4 25.4 86.5 33.1 53.4 133.0 80.0 14.2 Pressurized operation (Plan 53 or 54) 45 65.0 68.5 73.0 78.4 25.0 53.4 25.4 86.5 33.1 53.4 138.0 82.0 14.2 requires a buffer system (e.g. Burg- 48 68.4 71.0 75.0 78.7 25.3 53.4 25.4 86.8 33.4 53.4 138.0 85.0 14.2 50 70.0 73.0 78.0 79.1 25.7 53.4 25.4 87.2 33.8 53.4 148.0 87.0 14.2 mann TS2000). In pressureless mode 53 71.9 75.0 87.0 77.8 24.4 53.4 25.4 87.4 34.0 53.4 148.0 97.0 18.0 the quench fluid can be used as either a 55 74.6 77.0 83.0 78.9 25.5 53.4 25.4 87.0 33.6 53.4 148.0 92.0 18.0 dead-end quench (Plan 51) or a through- 60 83.9 87.0 91.0 80.1 26.7 53.4 25.4 88.2 34.8 53.4 157.0 102.0 18.0 flow quench (Plan 52), depending on the 65 87.5 90.0 98.5 80.0 26.6 53.4 25.4 88.1 34.7 53.4 163.0 109.3 18.0 70 93.0 98.0 108.0 81.5 28.1 53.4 25.4 89.6 36.2 53.4 178.0 118.3 18.0 operating conditions. 75 96.8 101.6 118.0 94.4 30.5 63.9 28.0 107.4 43.5 63.9 190.0 129.0 18.0 Missing mounting dimensions are the 80 104.7 108.0 124.0 94.4 30.4 64.0 28.0 106.8 42.9 63.9 195.0 135.0 18.0 same as for Mtex-QN. Item Designation 1 Bellows unit 2 O-ring 3 Set screw 4 Seat 5 O-ring ➞ ➞ 6 Shaft sleeve ➞ ➞ 7 O-ring 8 Cover 9 Seal face 10 O-ring 11 Spring 12 Seat Multipoint injection Optimized assembly fixtures Variable installation 13 O-ring Optimum sliding face cooling through The exact factory-end adjustment of the Thanks to an additional venting hole 14 Drive collar multipoint injection. Uniform radial fee- seal with regard to the bellows (spring) the Mtex-DN can also be installed in 15 O-ring ding of the cooling medium (distributed tension and in relation to the cover a 90° offset position. The connections 16 Set screw over 360°) to the sliding faces prevents is 100% secure until final attachment to for the buffer fluid are then horizontal 17 Retaining ring thermally induced and irregular distorti- the shaft and pump housing: the buffer fluid are then horizontal and 18 Assembly fixture ons. The mechanical seal runs with high easier to reach in cramped conditions 19 Hex socket head screw stability and low leakage. Multipoint • No installation errors; mounting „fully in the pump latern. 20 Gasket injection has proven successful at extre- compressed“ is impossible me temperatures. • Assembly fixtures can be removed Optional for Mtex-QN and -TN. easily and quickly from any mounting Retrofitting is also possible. position Burgmann Konstruktionsmappe 15.3 59 Rotating seat, stationary multiple springs SH SHF Single seal Application: Boiler feed water pumps d1 = 40 ... 250 mm 1.57”... 9.84” p1 = 50 bar 725 PSI t = 300 °C*) 572 °F vg = 60 m/s 197 ft/s Item Designation 1.1.1 Seal face 1.1.3 Spring 1.2 Seat 2 Shaft sleeve 6 Cover 8 Pumping screw with flow guide 9 Assembly fixture 14 Shrink disk Balanced Pumping device optional Unindirectional Mechanical seals in the SH range were developed for applications involving high pressures and sliding velocities. The deformation behavior of this latest gener- ation of seals has been optimized on the basis of extensive FE analyses. The large- ly standardized inside components are matched to the respective pump installa- tion spaces by means of special adapters. Currently, static pressures of up to 500 barg and dynamic pressures of up to 150 barg can be sealed. The sliding face materials are generally carbon gra- phite/SiC or SiC/SiC. SHPV/SHFV Item Designation Please contact us for details of dimen- 1.1.1 Seal face pressure-stabilized Single seal sions. 1.1.3 Spring Application: Boiler circulating pumps 1.1.4 Back-up ring 1.2 Rotating seat d1 = 40 ... 250 mm 1.57”... 9.84” 2 Rotating seat housing with pum- p1 = 150 bar 725 PSI ping screw (F) or pumping ring (P) *) t = 300 °C /200 °C 572 °F/392 °F 6 Cover vg = 60 m/s 196 ft/s *) refer to diagram on page 124 *) (temperature of the medium) 60 Burgmann Mechanical Seal Design Manual 15.3 6 1.1.3 12 14 82 1.2 10 1.1.1 4 SH SHV SHFV-D Single seal Double seal Application: Oil production and transport Application: Oil production and transport d1 = 40 ... 250 mm 1.57”... 9.84” d1 = 40 ... 250 mm 1.57”... 9.84” p1 = 150 bar 725 PSI p1 = 150 bar 2176 PSI t = 200 °C*) 392 °F t = 200 °C 392°F vg = 50 m/s 164 ft/s vg = 50 m/s 164 ft/s Item Designation Item Designation 1.1.1 Seal face 1.1.1 Seal face 1.1.3 Spring 1.1.3 Spring 1.2 Seat 1.2 Rotating seat 6 Cover 2 Shaft sleeve 9 Assembly fixture 4 Clamping sleeve 14 Shrink disk 6 Housing 8 Cover 12 Assembly fixture 14 Shrink disk Burgmann Mechanical Seal Design Manual 15.3 61 Stationary springs, rotating seat HRN Single seal HRN Operating limits (see note on page 1) Balanced Item Part Designation 0.71" ... 3.94" d1 = 18 ... 100 mm Independent DIN 363 PSI 24250 p1 = 25 bar of direction of rotation t = +220 °C 428 °F 1.1 472 Seal face EN 12756 vg = 20 m/s 66 ft/s 1.2 412.1 O-ring Permissible axial offset Ȁ 1 mm The new stationary mechanical seal for 1.3 485 Retainer Werks DIN installation spaces is ideal for use 1.4 477 Spring in dirty, abrasive media containing so- 1.5 412.2 O-ring Materials lids, e.g. in waste water systems and 2 475 Seat the chemicals industry. The stationary Seal face: silicon carbide Q1 3 412.3 O-ring Seat: carbon graphite, part has multiple springs and faces 4 485 Drive collar away from the product. It is thus pro- resin-impregnated (B, Q1) 5 412.4 O-ring O-rings: V, P, K, T tected from possible effects of the me- 6 904 Threaded pin dium such as sticking and clogging. Components: 1.4571 (G) The seal is suitable for pressure rever- Springs: Hastelloy®C-4 (M) sals and can be operated in tandem as well as back-to-back arrangements. In vacuum mode there is no need for a se- parate stationary seat stop. No dyna- mically loaded O-ring on the shaft means there is no loading of the secon- dary seal by run-out caused by bending of the shaft. Distributed torque input and stationary seat locking by square pin. nld1 d3 d6 d7 d8 d10g I1kg I3s I5 I6 fs mx d1 d3 d6 d7 d8 d10f I1ks I3nl I5f I6 fs mx 18 33 27 33 3 34.7 37.5 19.5 2.0 5 3.0 4 50 70 62 70 4 71.7 47.5 25.0 2.5 6 4.0 6 20 35 29 35 3 36.7 37.5 19.5 2.0 5 3.0 4 53 73 65 73 4 74.7 47.5 25.0 2.5 6 4.0 6 22 37 31 37 3 38.7 37.5 19.5 2.0 5 3.0 4 55 75 67 75 4 76.7 47.5 25.0 2.5 6 4.0 6 24 39 33 39 3 40.7 40.0 20.5 2.0 5 3.5 5 58 78 70 78 4 80.5 52.5 28.0 2.5 6 4.0 6 25 40 34 40 3 41.7 40.0 20.5 2.0 5 3.5 5 60 80 72 80 4 82.5 52.5 28.0 2.5 6 4.0 6 28 43 37 43 3 44.7 42.5 21.5 2.0 5 3.5 5 63 83 75 83 4 85.5 52.5 28.0 2.5 6 4.0 6 30 45 39 45 3 46.7 42.5 21.5 2.0 5 3.5 5 65 85 77 85 4 87.5 52.5 28.0 2.5 6 4.0 6 32 48 42 48 3 49.7 42.5 21.5 2.0 5 3.5 5 68 90 81 90 4 92.5 52.5 28.0 2.5 7 4.0 6 33 48 42 48 3 49.7 42.5 21.5 2.0 5 3.5 5 70 92 83 92 4 94.5 60.0 34.0 2.5 7 6.0 8 35 50 44 50 3 51.7 42.5 21.5 2.0 5 3.5 5 75 97 88 97 4 100.5 60.0 34.0 2.5 7 6.0 8 38 56 49 56 4 57.7 45.0 24.0 2.0 6 4.0 6 80 105 95 105 4 108.5 60.0 34.0 3.0 7 6.0 8 40 58 51 58 4 59.7 45.0 24.0 2.0 6 4.0 6 85 110 100 110 4 113.5 60.0 34.0 3.0 7 6.0 8 43 61 54 61 4 62.7 45.0 24.0 2.0 6 4.0 6 90 115 105 115 4 118.5 65.0 39.0 3.0 7 10.0 8 45 63 56 63 4 64.7 45.0 24.0 2.0 6 4.0 6 95 120 110 120 4 123.5 65.0 39.0 3.0 7 10.0 8 48 66 59 66 4 67.7 45.0 24.0 2.0 6 4.0 6 100 125 115 125 4 128.5 65.0 39.0 3.0 7 10.0 8 62 Burgmann Mechanical Seals Design Manual 15.3 Stationary bellows MFL65 HRN/MFL65 Single seal MFL65 Stationary seats Balanced Item Part Description The stationary seat design is chosen Independent DIN according to the specific requirements of direction of rotation 24250 and conditions of operation. Metal bellows 1.1 472 and Seal face and The MFL65 mechanical seal was spe- 481 bellows unit cially developed for high temperature 1.2 400.1 Flat gasket ranges and sliding velocities. Its torque 2 475 Stationary seat transmission exerts no strain on the bellows. The seal design requires no Combination of materials elastomer secondary seals. Bellows: ® M6 - Inconel 718. 2.4819 Operating limits (see note on page 1) ® M5 - Hastelloy C Seal face: A. Q d1 = 16 ... 100 mm 0.64" ... 4" 12 (>100 mm on request) Rotating seat: Q1, S 1) p1 = with external pressurization : Other metal parts: = 25 bar 360 PSI 1.4462. 1.3917, 2.4610 with internal pressurization2): <60h °C 10 bar 145 PSI <125h °C 07 bar 100 PSI <220h °V 05 bar 72 PSI t = –20 ... 400 °C –30 ° F ... 755 °F vg = 50 m/s 165 ft/s 1) Higher pressures possible with special 2) designs – please refer to Burgmann. 2) Positively retained stationary seat. Nenn- л d1 d2 d3 d4 d5 d6 lnxmx t 19 16–190 20.5 29 30.3 25.3 45.0 33.5 4x M4 6 24 20–240 25.5 35 38.8 33.8 49.0 33.5 4xM4 6 30 25–300 31.5 40 43.6 38.6 55.0 34.5 6xM4 6 35 31–350 36.0 45 45.8 40.8 59.0 33.0 6xM4 6 40 36–400 41.0 50 51.5 46.5 65.0 30.5 6xM4 6 45 41–450 46.0 55 55.2 50.2 69.0 35.5 6xM4 6 51 46–510 52.0 63 64.7 59.7 76.5 40.5 6xM5 7 60 52–600 61.0 70 70.6 65.6 84.0 32.0 6xM5 7 70 61–700 71.0 80 82.8 76.8 95.0 38.0 6xM5 7 82 71–820 83.5 95 98.0 92.0 112.0 41.0 6xM6 7 88 83–880 89.5 100 107.7 101.7 120.0 47.0 6xM6 7 100 89–100 101.0 112 112.7 106.7 130.0 47.0 6 x M 6 7 Burgmann Mechanical Seals Design Manual 15.3 63 Stationary springs H10/H8 H8 Operating limits, items and descriptions same as H10. If any fitting dimensions are not shown they are the same as for H10. Drive collars and housings for item 1.2 are made of deep-drawn stainless steel sheet. Single seal H10 Balanced Item Part no. Description Independent of direction DIN of rotation 24250 1.1 472 Seal face Multiple springs 473 Seal face housing Mechanical seals of the H8 and H10 1.2 485 Driver collar range have a short (axial) installation 1.3 O-ring length. They are compact ready-to-fit 1.4 477 Sping seals which can be installed in the same 2 475 Stationary seat*) axial length as a lip-seal and can be used 3 412.2 O-ring to seal differential pressures of up to *) The stationary seat design is chosen 25 bar. according to the specific requirements H10 and conditions of operation. Operating limits (see note on page 1) Materials d1 = 15 ... 100 mm 0.6” ... 4” p1 = 25 bar 360 PSI Seal face (carbon): A, B t = –20 ... +180 °C –4 °F ... 355 °F vg = 35 m/s 115 ft/s d1 d2z d2’d30 d4n d5n d6 l0t l1t l1’ d1 d2z d2’d30 d4n d5n d6 li l1t l1’ i 15 16 17 42 22.6 21 34 17 15.0 16 50 51 52 80 58.2 56 72 17 15.0 16 18 19 – 45 25.6 24 37 17 15.0 – 52 53 – 82 60.2 58 74 17 15.0 – 20 21 22 48 27.6 26 40 17 15.0 16 55 56 57 85 63.2 61 77 17 15.0 16 22 23 24 50 29.6 28 42 17 15.0 16 58 59 – 90 66.7 64 82 17 15.0 – 25 26 27 52 32.8 31 44 17 15.0 16 60 61 62 90 68.7 66 82 17 15.0 16 28 29–5535.834471715.0– 65 66 67 95 73.7 71 87 19 16.5 18 30 31 32 58 37.8 36 50 17 15.0 16 68 69 70 100 76.7 74 92 19 16.5 18 32 33 34 60 39.8 38 52 17 15.0 16 70 71 72 100 78.7 76 92 19 16.5 18 35 36 37 62 42.8 41 54 17 15.0 16 75 76 77 108 83.7 81 100 19 16.5 18 38 39 40 65 45.9 44 57 17 15.0 16 80 81 82 112 88.7 86 104 19 16.5 18 40 41426847.946601715.016 85 86 87 118 93.7 91 110 19 16.5 18 42 43 44 72 49.9 48 64 17 15.0 16 90 91 92 122 99.5 96 114 19 16.5 18 45 46 47 75 52.9 51 67 17 15.0 16 95 96 97 128 104.5 101 120 19 16.5 18 48 49–8055.954721715.0– 100 101 102 132 109.5 106 124 19 16.5 18 Axial tolerances: l ± 0.5 H10 Axial-Toleranzen: l ± 0.2 H8 64 Burgmann Mechanical Seals Design Manual 15.3 GassealsGas-lubricated Mechanical Seals 65 Gas-lubricated Seals for Pumps, Mixers, Compressors. Gas Supply Systems Operation and Technology . . . . . 66/67 Supply System GSS ...... 67 CGS-KD ...... 68/69 Cartex-GSD ...... 70 GSO ...... 71 MFL85GS ...... 72 Mtex-GSD ...... 72 HRGS-D ...... 73 AGS ...... 74 AGSR ...... 75 DGS ...... 76/77 PDGS ...... 78 TDGS ...... 78 CSR ...... 79 Seal Management System SMS ...... 79 Burgmann Mechanical Seals Design Manual 15.3 65 Gas-lubricated Mechanic Burgmann Gas-lubricated Seals. Running dry as if greased. Unmatched for their efficiency and high degree of safety and environ- mental protection. To be used in almost any industrial sector and field of application. Until only recently, use of the gas seal was limited more or less to compres- sors. Today it can be variously used to seal machines of the most diverse types: Liquid-conveying pumps, e. g. for media containing solids or for media with poor lubricating properties, such as hydro- carbons. as a downstream safety seal. for low-speed shafts in mixers and reactors in the chemical and pharmaceutical industries where sterility is required, or when leakage of buffer fluid into the product must be prevented (so-called dry-running applications). Burgmann GS technology is also able to meet the requirements of the German The operating principle Gas in Clean Air Act as well as demands for zero emission, and Gas in In its basic design and mode of opera- Rotation to a very profitable tion, the Burgmann Gas Seal is the same degree: Rotation as a conventional mechanical seal except Lower investment for two differences: a) the sliding faces costs are matched are wider, and b) they are lubricated by Ressure field by a longer service gas rather than liquid. life and lower operating expenses. This is assured in outstanding manner by the sophisticated geometry of V and U grooves in the sliding faces. Even at low speeds a stable gas film develops in the V-grooves sealing gap to separate the sliding faces U-grooves The V-grooves convey the gas by a rotary and guarantee non-contacting, wear-free For sliding faces featuring U-grooves, the movement between the sliding faces. The operation, at a minimum level of power operating principle is similar to that for resulting pressure rise causes the seal consumption that is 95 % below that of V-grooves, with one decisive difference: faces to lift off and ensures a contact- liquid-lubricated seals. the direction of rotation is independent. free operation. V-grooves are dependent Elaborate buffer fluid oil systems for the on the direction of rotation. lubrication and cooling of double seals are superfluous. Gas pressurization at a level of around 5 to 10 % above product pressure (p1) makes sure that no process medium can escape to the atmosphere. A small gap height of approximately 3 µm between the sliding faces results in minimum consumption of buffer gas of a magnitude that depends largely on the pressure, speed and seal diameter. 66 Burgmann Mechanical Seals Design Manual 15.3 al Seals *) *) Supplysystemsfor compressorseals U-groove (medium: air;p=5bar;t50°C (medium: U-groove with Buffer gasconsumptionCGS-D Leckage [mI/min Standard Volume] see SMS on page79. see SMS Shaft Diameter[mm] Leckage [SCFM] other obstructions. other obstructions. to groundclearanceand ble foroperatoruserelative figure andmustbeaccessi- Valves tobeinstalledper plied byvendor. Systemissup- temperatures. fluid condensesatambient plan isusedwhenpumped Thison Arrangement2seals. drain forcondensingleakage Containment sealchamber Plan 75 gas inthefuture. purchaser mayusebuffer plan isusedwhenthe purchaser’s use.Typicallythis Tapped connectionsfor Plan 71 Circulation systems for gas-lubricated mechanical seals (API 682,2ndEdition) Circulation mechanical systemsfor seals(API gas-lubricated the buffergaspressurelevelp a closedcircularnitrogenpipeline),and examplefrom pressurized buffergas(for be usedinconjunctionwithadequately sealsmayonly gas-lubricated Buffered, DGS compressorseals. DGS gas supplysystemsneededtooperate Thisparameters. appliesinparticularto take accountofthespecificapplication systemisindividuallydesignedto GSS Asarule,every red centrallyonrequest. Valuessafety regulations. canbemonito- pointsinlinewith alarm andswitch-off systemsareequippedwith GSS supplied. with therequirementsofsealstobe inaccordance and monitoredbytheGSS isregulated airornitrogen) work (e.g. Theseals. gasdrawnfromasupplynet- mechanical gas-lubricated operated, were speciallydevelopedforcontact-free G fied fortheindividualsealtypes. mum pressureoverlaylevel( Therating statethemachineisin. mini- irrespectiveofwhichope- sealed product, higher thanthepressurelevelp as for pumpsandagitators gasbarriered seals Supply systemsfor gas-lubricated, S upply S ystems of the GSS series ystems oftheGSS or inconjunctionwithPlan alone todilutesealleakage Buffer gasmaybeused for Arrangement2seals. suppliedgasbuffer Externally Plan 72 ⌬ p) isspeci- p) 3 1 must be of the *) continuously fromtheCSV (1/2” minimum andshallrise 1. Tubingshallbe13 mm ser. System issuppliedbypurcha- at ambienttemperatures. ped fluiddoesnotcondense This plan isusedwhenpum- kage orArrangement2seals. lea- drain fornon-condensing Containment sealchamber Plan 76 Main functionsofaGSS: side pressureofinnerseal. gas islowerthanprocess Pressuresystem. ofbuffer kage intoaclosedcollection 75 or76 tohelpsweeplea- of theGSS Block diagram Flow monitoring Pressure monitoringandregulation Filtering ofbufferandflushinggas Leakage controlanddischarge 1 ” 2 (1/ 15 shallbeDN 2. Harness strument harness. connection tothepiping/in- **) **) **) Series100: Systemmountedonplate =Flowmeter contact =FlowmeterwithMAX H FIA FI contact =Pressure gaugewithMIN =Pressure gauge L PIA PI seal gland. put ontubingconnectedto stand suchthatnostrainis overhead structureorside ness shallbesupportedfrom Pressure gauge GSS4016/A...-00 Designation for meter Flow and agitators(p Overview Standard ofGSS for pumps Burgmann Mechanical SealsDesign Manual15.3 ) Series 300:Systemofstainlesssteelinhousing Series 200:Systeminbox minimum pipe.Har- range large range small 0 1 0 1 0 1 0 213 313 203 303 212 312 202 302 311 211 301 201 310 300 210 200 0 1 0 1 0 1 0 113 103 112 102 111 101 110 100 IP I I IP I I L PIA PIA L PI PI PIA L PIA L PI PI IF IFI FI FI FI I–F I–FI – FI – FI – FI – V = pressure switchhigh vent = PSH pressure switchlow = PSL = PI pressure indicator pressure controlvalve, = PCV level swithhigh = LSH flow swithhigh = FSH Coalescing Filter, used = FIL = FI flow containment sealdrain = CSD indicator containment sealvent = CSV gas barrieroutlet = GBO gas bufferinlet = GBI flush F = Legend: Typical dutiesofaGSS Gas quenchingfortandemseals Gas flushingforsingleseals Buffer gassupplyfordoubleseals 1 seal. applied tocontainment and/or limitpressure rization ofinnerseal vent reversepressu- gas pressuretopre used tolimitbuffer minate seals. supply donotconta- sent inbuffergas liquids mightbepre- to ensureslidsand/or = 16 bar) Version**) IHFIAH FIAH (1.5 mm). gas supplylinetobe0.062” orificeinbarrier specified, When cess sideofinnerseal. rier gasishigherthanpro- atmosphere. Pressure ofbar- cess fluidfromleakingto used topositivelypreventpro- suppliedbarriergas Externally Plan 74 IHFIAH FIAH Gas Seals 67 For stepped shafts, rotating springs CGS-KN 1) d1 > 105: 2 mm x 30° 4) d1 > 105: H7 2) d1 > 105: 30° 5) d1 < 100: 2 mm x 90° 3) d1 > 105: + 0,1 1) d1 > 105: 4 mm x 90° Balanced CGS-KN Degassing Gas-lubricated Single seal periodical Buffer gas Independent of the direction of rotation1) Only for use in ventilators, blowers and * the like, with nonpolluting gases or as a EN 12756 secondary safety sael (see page 69). 1) Regularly available with U-grooves, on request with V-grooves (dependent on Item Parts Description To suction the direction of rotation). DIN side 24250 The CGS runs contact-free. With soft/ 1.1 472 Slide face hard material combination no pressure 1.2 485 Driver collar differential is required. The U- or V-groo- 1.3 474 Thrust ring ves are located in the stationary seat. The 1.4 412.1 O-ring CGS is adequate for sealing gases and 1.5 477 Spring liquids e.g. in ventilators, small steam tur- 1.6 904 Grub screw bines, blowers, roots compressors and 2 475.1 Stationary seat pumps at low and medium sliding veloci- 3 412.3 O-ring ties, pressures and temperatures. Ade- quate for pressure reversal. Materials Operating limits (see note on page 1) Seal face: A, B, Q1 Degassing Stationary seat: Q1, Q19 For processes where no buffer gas, e.g. d = 28 ... 125 mm 1.10" ... 4.92" 1 Construction materials, spring: G N2, may enter the product, degassing is p1 = 25 bar 363 PSI possible (DGM No. 296007072, US = (dependent on the shaft diameter) Patent No. 5722671). The leakage gas t = –20 ... 200 °C –4 °F ... 392 °F enters an annular chamber which is = (note resistance of secondary arranged on the product side of a dou- = seals and sliding materials) ble gas seal and is equipped with a vg = 4 ... 25 m/s 13 ... 82 ft/s pumping means. The medium mixed with the leakage gas flows from this chamber into a separating receptacle where the medium collects below and the leakage gas in the top area. From the lower part of the receptacle, the degassed medium then returns to the process while the separated gas can be removed from the upper part. 68 Burgmann Mechanical Seals Design Manual 15.3 CGS as a safety seal zurto the Fackel flare N 2 Multiple seal in tandem arrangement with intermedia- te throttle CSR for all media with a gaseous leakage. Provided on the product side with a liquid-lubricated H75K. in ventilators and blowers. No product CGS-KD Normally, the CSR is pressurized with nitrogen at an excess emissions to the atmosphere. Buffer Double seal pressure of 0.5 to 3 bar. Dissipation of the product leakage CGS gas supply is required (see page 67). For sealing applications involving li- via a flare is ensured by means a pressure differential regula- Items, descriptions and unspecified di- quids, e.g. in pumps, and gases that are tor. The CGS runs contact-free in case of a failure, The CGS mensions as for CGS-KN. not to escape into the environment, e.g. assumes sealing of the product. Only a little nitrogen leakage reaches the atmosphere. Here too, the product leakage is dissipated via the flare. Operating limits (see note on page 1) p1 = ... 23 bar 333 PSI 362 PSI PressureDrucküberwachung control p3 = ... 25 bar VentingEntlüftung ⌬p = min. 2 bar 30 PSI other operating limits as CGS-KN d1s d2 d3 d6s d7s d6 l1Ks l1' l2i l3nf l3' l4m l5s l6 l7 l8m lgnl l31f f mx 28* 33 48 37.0 43.0 3 50.0 89 20 38.5 66.0 33.0 2.0 5 9 19.5 11.5 16.5 5 M6 30* 35 50 39.0 45.0 3 50.0 89 20 38.5 66.0 33.0 2.0 5 9 19.5 11.5 16.5 5 M6 32* 38 55 42.0 48.0 3 50.0 89 20 38.5 66.0 33.0 2.0 5 9 19.5 11.5 16.5 5 M6 33* 38 55 42.0 48.0 3 50.0 89 20 38.5 66.0 33.0 2.0 5 9 19.5 11.5 16.5 5 M6 35* 40 57 44.0 50.0 3 50.0 89 20 38.5 66.0 33.0 2.0 5 9 19.5 11.5 16.5 5 M6 38* 43 60 49.0 56.0 4 52.5 95 23 38.5 67.0 33.5 2.0 6 9 22.0 14.0 16.5 5 M6 40* 45 62 51.0 58.0 4 52.5 95 23 38.5 67.0 33.5 2.0 6 9 22.0 14.0 16.5 5 M6 43* 48 65 54.0 61.0 4 52.5 95 23 38.5 67.0 33.5 2.0 6 9 22.0 14.0 16.5 5 M6 45* 50 67 56.0 63.0 4 52.5 95 23 38.5 67.0 33.5 2.0 6 9 22.0 14.0 16.5 5 M6 Tandem arrangement with pressure control 48* 53 70 59.0 66.0 4 52.5 95 23 38.5 67.0 33.5 2.0 6 9 22.0 14.0 16.5 5 M6 for media with a gaseous leakage. H75VN on the product 50* 55 72 62.0 70.0 4 57.5 99 25 42.5 69.0 34.5 2.5 6 9 23.0 15.0 16.5 5 M6 side. In case of a failure, the CGS on the atmosphere side 53* 58 79 65.0 73.0 4 57.5 104 25 42.5 74.0 37.0 2.5 6 9 23.0 15.0 17.0 5 M6 works as a liquid seal. 55* 60 81 67.0 75.0 4 57.5 106 25 42.5 76.0 38.0 2.5 6 9 23.0 15.0 17.0 5 M6 58* 63 84 70.0 78.0 4 62.5 112 25 47.5 82.0 41.0 2.5 6 9 23.0 15.0 19.0 7 M8 60* 65 86 72.0 80.0 4 62.5 112 25 47.5 82.0 41.0 2.5 6 9 23.0 15.0 19.0 7 M8 63* 68 89 75.0 83.0 4 62.5 112 25 47.5 82.0 41.0 2.5 6 9 23.0 15.0 19.0 7 M8 65* 70 91 77.0 85.0 4 62.5 112 25 47.5 82.0 41.0 2.5 6 9 23.0 15.0 19.0 7 M8 70* 75 99 83.0 92.0 4 70.0 118 28 52.0 82.0 41.0 2.5 7 9 26.0 18.0 19.0 7 M8 75* 80 104 88.0 97.0 4 70.0 120 28 52.0 84.0 42.0 2.5 7 9 26.0 18.0 19.0 7 M8 80* 85 109 95.0 105.0 4 70.0 120 28 51.8 83.6 41.8 3.0 7 9 26.2 18.2 19.0 7 M8 85* 90 114 100.0 110.0 4 75.0 120 28 56.8 83.6 41.8 3.0 7 9 26.2 18.2 19.0 7 M8 90* 95 119 105.0 115.0 4 75.0 120 28 56.8 83.6 41.8 3.0 7 9 26.2 18.2 19.0 7 M8 95* 100 124 110.0 120.0 4 75.0 120 28 57.8 85.6 42.8 3.0 7 9 25.2 17.2 19.0 7 M8 100* 105 129 115.0 125.0 4 75.0 120 28 57.8 85.6 42.8 3.0 7 9 25.2 17.2 19.0 7 M8 105* 115 148 122.2 134.3 5 73.0 133 32 53.0 93.0 46.5 2.0 10 – 30.0 20.0 22.5 7 M8 110* 120 153 128.2 140.3 5 73.0 133 32 53.0 93.0 46.5 2.0 10 – 30.0 20.0 22.5 7 M8 115* 125 158 136.2 148.3 5 73.0 133 32 53.0 93.0 46.5 2.0 10 – 30.0 20.0 22.5 7 M8 120* 130 163 138.2 150.3 5 73.0 133 32 53.0 93.0 46.5 2.0 10 – 30.0 20.0 22.5 7 M8 125* 135 168 142.2 154.3 5 73.0 133 32 53.0 93.0 46.5 2.0 10 – 30.0 20.0 22.5 7 M8 Magnetic coupling with a down-stream CGS acting as safety seal. In case of da- mages in the can, the CGS assumes the sealing and prevents uncontrolled emission. Burgmann Mechanical Seals Design Manual 15.3 69 Stationary springs, rotating seat Cartex-GSD/GSO-D Cartridge seal Cartex-GSD Materials Gas-lubricated, Double seal with barrier gas connection Face materials: gas barriered Product side: Q ,/Q Item Description 19 1 Independent of direction Atmosphere side: Q1/U2 of rotation*) 1, 9 Seal face Components: G 2, 5, 7, 10, 12, 18 O-ring The Cartex-GSD has all the attributes of Springs: M 3 Spring modern sealing technology. It is equally O-rings: V, E, K, U1 4, 11 Seat suitable for the conversion of centrifugal 6 Shaft sleeve pumps previously fitted with conventional 8 Cover seals or packings as for the standardi- 13 Retainer zation of original equipment. Made of 14 Ring quality materials it is largely resistant to 15 Threaded pin media, including those containing solids. 16 Snap ring Suitable for pressure reversals. 17 Counter-sunk socket screw *) with U grooves as standard 19, 20 Assembly fixture 21 Socket head screw Operating limits (see note on page 1) 22 Gasket d1 = 28 ... 100 mm 1.10" ... 3.94" p1 = ... 13 bar 189 PSI p3 = ... 16 bar 232 PSI t = –20 °C ... +200 °C = –4 °F ... 392 °F =(note resistance of secondary seals) vg = 4 ...15 m/s 13 ... 49 ft/s Axial movement ± 1.0 mm ⌬p = min. 3 bar 45 PSI 70 Burgmann Mechanical Seals Design Manual 15.3 GSO-D Operating limits (see note on page 1) Double seal in face-to-face arrangement, d = 25 ... 100 mm 0.98" ... 3.94" with outboard cartridge unit. 1 = (please inquire about dimensions) p = ... 10 bar 145 PSI The GSO-D packs a maximum of seal 1 = (dependent on the shaft diameter technology into the shortest of spaces. = and the sliding materials) Hardly longer than a conventional seal p = 12 bar 174 P S I cover it fits in practically all standard seal 3 ⌬p = min. 12 bar 30 PSI compartments without the need for modi- t = –20°C ... +200°C –4°F...428 °F fications or conversions. v = 16 m/s 52 ft/s Especially suitable for fans and ventilators g Axial movement ± 1.5 mm to seal pure gases. Materials Seal face: Q1 Seat: Q19, U2 O-rings: V, E, K, U1 Components: G, M Springs: M Cartex-GSD/GSO-D Dimensions in mm Dimensions in inches d1 d2 d3 d3 l4 l5 l6 l7 a2 da s d1 d2 d3 d3 l4 l5 l6 l7 a2 da s min. max. min. max. 28 46.0 47.0 52.0 25.4 86.5 53.4 33.1 65 105 14 1.125 1.811 1.850 2.047 1.000 3.400 2.102 1.303 2.560 4.134 0.551 30 48.0 49.0 56.0 25.4 86.5 53.4 33.1 67 105 14 1.250 1.960 2.000 2.250 1.000 3.400 2.102 1.303 2.760 4.330 0.551 32 49.8 51.0 57.0 25.4 86.5 53.4 33.1 70 108 14 1.375 2.086 2.125 2.420 1.000 3.400 2.102 1.303 2.840 4.449 0.551 33 49.8 51.0 57.0 25.4 86.5 53.4 33.1 70 108 14 1.500 2.200 2.250 2.625 1.000 3.400 2.102 1.303 2.950 4.842 0.551 35 53.0 54.0 61.5 25.4 86.5 53.4 33.1 72 113 14 1.625 2.380 2.375 2.700 1.000 3.400 2.102 1.303 3.090 4.842 0.650 38 56.0 57.0 66.0 25.4 86.5 53.4 33.1 75 123 14 1.750 2.460 2.520 2.874 1.000 3.400 2.102 1.303 3.228 5.433 0.650 40 58.0 59.0 68.0 25.4 86.5 53.4 33.1 77 123 16 1.875 2.598 2.638 2.952 1.000 3.400 2.102 1.303 3.346 5.433 0.650 42 60.5 61.5 69.5 25.4 86.5 53.4 33.1 80 133 16 2.000 2.677 2.750 3.190 1.000 3.400 2.102 1.303 3.430 5.827 0.650 43 60.5 61.5 70.5 25.4 86.5 53.4 33.1 80 133 16 2.125 2.834 2.875 3.437 1.000 3.400 2.102 1.303 3.820 5.827 0.709 45 62.5 64.0 73.0 25.4 86.5 53.4 33.1 82 138 16 2.250 2.960 3.000 3.560 1.000 3.400 2.102 1.303 3.940 6.181 0.709 48 66.0 67.0 75.0 25.4 86.5 53.4 33.1 85 138 16 2.375 3.070 3.125 3.590 1.000 3.400 2.102 1.303 4.020 6.181 0.709 50 68.0 69.0 78.0 25.4 86.5 53.4 33.1 87 148 16 2.500 3.212 3.250 3.800 1.000 3.400 2.102 1.303 4.180 6.417 0.709 53 72.0 73.0 87.0 25.4 86.5 53.4 33.1 97 148 18 2.625 3.338 3.375 3.937 1.000 3.400 2.102 1.303 4.300 6.417 0.709 55 73.0 74.0 83.0 25.4 86.5 53.4 33.1 92 148 18 2.750 3.660 3.750 4.250 1.000 3.400 2.102 1.303 4.660 7.008 0.709 60 78.0 79.0 91.0 25.4 86.5 53.4 33.1 102 157 18 2.875 3.811 3.875 4.567 1.000 4.250 2.516 1.736 4.960 7.283 0.709 65 83.0 84.5 98.5 25.4 86.5 53.4 33.1 109 163 18 3.000 3.937 4.000 4.646 1.102 4.250 2.516 1.736 5.079 7.480 0.709 70 93.0 95.0 108.0 25.4 86.5 53.4 33.1 118 178 18 3.125 4.063 4.125 4.764 1.102 4.250 2.516 1.736 5.197 7.677 0.709 75 100.0 101.6 118.0 28.0 108.0 63.9 44.1 129 190 18 3.250 4.189 4.250 4.882 1.102 4.250 2.516 1.736 5.315 7.677 0.709 80 106.4 108.0 124.0 28.0 108.0 63.9 44.1 135 195 18 3.375 4.311 4.375 5.039 1.102 4.250 2.516 1.736 5.472 7.795 0.866 85 109.5 111.1 129.0 28.0 108.0 63.9 44.1 139 198 22 3.500 4.437 4.500 5.157 1.102 4.250 2.516 1.736 5.591 7.795 0.866 90 115.9 117.5 135.0 28.0 108.0 63.9 44.1 145 205 22 3.625 4.563 4.625 5.315 1.102 4.250 2.516 1.736 5.709 8.071 0.866 95 119.1 120.7 138.0 28.0 108.0 63.9 44.1 148 208 22 3.750 4.689 4.750 5.433 1.102 4.250 2.516 1.736 5.827 8.189 0.866 100 125.4 127.0 144.0 28.0 108.0 63.9 44.1 154 218 22 4.000 4.937 5.000 5.669 1.102 4.250 2.516 1.736 6.063 8.583 0.866 Burgmann Mechanical Seals Design Manual 15.3 71 Rotating bellows Mtex-GSD / MFL85GS Cartridge seal Mtex-GSD Single seal MFL85GS Gas-lubricated, Double seal (face-to-face) Gas-lubricated gas barriered with barrier gas connection Balanced Item Description 1.1 Seal face with bellows unit Metal bellows Independent of direction 1.2 O-ring Item Description *) Independent of direction of rotation 1.3 Ring *) 1, 3 Bellows unit of rotation 2, 4, 6, 7, 10 O-ring EN 12756 1.4 Set screw The Mtex-GSD opens up wide-ranging 5 Seat Elastomer-free 2 Type G9 seat possibilities for the use of gas-lubricated 8 Housing The MFL85GS is suitable for extreme 3 O-ring mechanical seals in low and high tempe- 9 Shaft sleeve temperature ranges. All types of secon- rature ranges. Ideally suited for gaseous 11, 13 Set screw dary seal can be used thanks to the spe- or volatile media in pumps and compres- 12 Retaining ring cial drive collar ring. The bellows has a sors. Designed for original equipment and 14 Socket head screw reduced spring rate. The solid seal face is conversions. Metal bellows with a redu- 15, 16 Assembly fixture hard-coated and welded to the bellows. ced spring rate and hydraulic balancing. 17 Gasket No dynamic O-rings. Suitable for reversed pressure. No dyna- 18 Socket head screw *) with U grooves as standard mic O-rings. 19 Gasket Seal arrangements Following seal arrangements are possible *) with U grooves as standard Operating limits (see note on page 1) with the MFL85GS: tandem (see drawing) Operating limits (see note on page 1) d1 = 28 ... 100 mm 1.10" ... 3.94" back-to-back = (Also refer to page 41 "MFL85N" as safety seal on the atmosphere side d1 = 25 ... 100 mm 0.98" ... 3.94" = for dimensions) = (please inquire about dimensions) p1 = 16 bar 232 PSI p1 = ... 13 bar 188 PSI = (externally pressurized) p3 = ... 16 bar 232 PSI t = –40 °C ...+300°C –40°F...572°F = (internal pressure) = (dependent on secondary seals) ⌬ 45 PSI p = min. 3 bar vg = 20 m/s 66 ft. t = –40°C ...+300°C –40°F...572°F = (dependent on secondary seals) Materials vg = 20 m/s 66 ft/s Bellows: M6 Seal face: Q1, T41 Materials Seat: A, Q1 Components: G, G1 Bellows: M6 Secondary seals: all elastomers, massive Seal face: T41 PTFE, pure graphite Seat: Q1 Components: G, G1 Secondary seals: all elastomers 72 Burgmann Mechanical Seals Design Manual 15.3 Stationary springs HRGS-D Mtex-GSD/MFL85-GS/HRGS-D Cartridge seal HRGS-DC HRGS-DD Gas-lubricated, Gas-buffered double seal The HRGS-DD corresponds to the HRGS- gas-buffered DC in terms of design principal and mate- Balanced The HRGS-DC is designed for applications rials. It is designed for applications invol- *) involving fitting dimensions in line with ving large shaft dimensions of up to dw Bi-directional DIN 24960 C or ANSI Big Bore Standard, 200 mm) or fairly high pressure levels of The HRGS-D is the gas-lubricated version but can also be used even when the fitting up to 40 bar. The outboard seal used in of the HR. An open sealing compartment is dimensions are not of standardized nature such cases is the DGS. ideal for this concept. Rotating seat loca- if large, open spaces are available for ted directly behind the pump impeller, installation. The CGS is used as outboard springs outside of the product. Very well seal up to nominal width 125. suited to applications involving media con- taining solids. Does not open on pressure Item Part No. Description reversal. Two variants available, depen- DIN ding on the sealing pressure and shaft dia- 24250 meter involved. 1.1.1 472.1 Seal face *) with U-grooves as standard, on request 1.1.4 477 Spring also available with uni-directional V-groo- 1.2 475.1 Seat ves. 2.1.1 472.2 Seal face 2.1.4 485 Drive collar Operating limits (see note on page 1) 2.1.5 477 Spring 2.2 475.2 Seat dw = 20 ... 200 mm 0,787”... 7,874” 3 523 Shaft sleeve p1 = ... 23 bar (HRGS-DC) 333 PSI 4 513 Insert = ... 40 bar (HRGS-DD) 580 PSI 10 441 Housing p3 = ... 25 bar (HRGS-DC) 362 PSI 13 Assembly fixture = ... 42 bar (HRGS-DD) 609 PSI vg = 4 ... 25 m/s 13 ... 82 ft/s ⌬p = min. 2 bar (29 PSI), max. 16 bar (232 PSI) (internal pressure) Materials Face materials: Atmosphere side: A, B, Q19 , Q1/U2 Product side: Q19 /Q1 Springs: G, M Components: G, M Burgmann Mechanical Seals Design Manual 15.3 73 74 Burgmann Mechanical SealsDesign Manual15.3 stries. stries. pharmacy, biotechnologyandfoodindu- larly suitableforsterileapplicationsinthe isparticu- rotating seatintheproduct) ("R"standsfor Theapplications. AGSR Itisidealfordry-running the product. gas butnobarrierfluidisallowedtoenter suitable forprocessesinwhichbarrier is etc..The reactors, AGS mixers, Dryers, ties (see thediagram"Liftingcurve"). ties (see sliding facesevenatlowveloci- guarantees astablegasfilmbetweenthe now GasSeal) (Agitator Burgmann AGS the buffergassupplysystem, GSS dimensioned gasinletgroovesandthe Thanks toacombinationofspecially be createdonhighspeedmachines. runningcouldonly faces fornon-contact film requiredbetweentheseal'ssliding Up tonowitwasthoughtthatthegas rotation availableonrequest *) versiondependentonthedirectionof Cartridge unit of rotation Independent ofdirection Balanced Gas-lubricated Areas ofapplication L1 *) AGS/AGSR For agitators d 3 h8 1 2Seat(Q O-ring Drivecollar 12 11, 6, 7 5 1,2 Seal face (B, Q (B, Sealface 1,2 Description Item 28154.ends toDIN 28141,flanges conformingtoDIN shaft 28136.according toDIN Connection For useonsteelandstainlesstanks dimension range). L1, butstillwithin theDIN L2(larger lengths Installation dimensions. for M461) Also refertopage8285(M481/ p v t Double seal AGS481K-D d Double sealwithfloatingbearing AGS481KL-D 3 4O-ring 14 13, 12 13 14 11 1 Operating limits g 1 3 7 5 6 2 1 connections according to DIN connections accordingtoDIN for topentrydrives = 10 m/s = ...+200(–350)°C = –30(–80)°C = ...6bar = 40...200mm –22 (–112) ...292(662)°F 33 ft/s 1 87 PSI 87 , Q (see noteonpage1)(see 2 ) 1.57"... 7.87" 1 , Q 2 ) L2 Rangeofapplication Y Minimumbarriergaspressure X Operatingrangeonlyafter B Sealsupplysystem A meters foralargemeasuringrange. togetherwithtwoflow andPIAL, FIAH A213-DO gassupplysystemwithalarm We recommendusingtheGSS4016 / system. gassupplyandcontrol Burgmann GSS usingtheupstream cylinder) work (or simple connectiontoagassupplynet- isa All ittakestooperatetheAGS/AGSR product side. AGS461L-D20 designedwithnometalonthe Burgmann sealed byagas-lubricated processing operations. Thetopentrydrive is design for fermentation andothermaterial Test Thale)ofglass-lined reactor (EHW Seal supplysystem required consultation v 28137-T2, 28159. shaftendstoDIN Connection flangesconformingtoDIN 28136.DIN tanksaccordingto For useonglass-lined d Double sealwithfloatingbearing AGS461KL-D Double seal AGS461K-D t p 1 Operating limits g 1 3 connections according to DIN connections accordingtoDIN for topentrydrives = ...+150= –30(–80)°C (200)°C = ...6bar = 40...160 mm = ...10 m/s –22 (–112) ...+302(392)°F °F L1 87 PSI 87 33 ft/s (see noteonpage1)(see 1.57" ...6.30" d 3 h8 L2 v Double seal AGSR5-D d pleaseinquire. run intheproduct, Ifthesealhas to Seat rotatesinthetank. Double sealwithfloatingbearing AGSR5L-D p t 1 Operating limits g 1 3 = 10 m/s = ...+120= –30(–80)°C °C = ...6bar = 20...200mm –22 (–112) ...+356°F 33 ft/s 87 PSI 87 (see noteonpage1)(see Burgmann Mechanical SealsDesign Manual15.3 0.79" ...7.87" sterile applications. Double sealwithfloatingbearingfor AGSR3L-D Double seal AGSR3-D polished AGS / AGSR 75 76 Gas-lubricated Cartridge units Burgmann Mechanical SealsDesign Manual15.3 d pressor's efficiency. anincreaseofthecom- but notleast, last contamination oftheproductand, nooil long servicelife,lowleakagerates, highsafetyinoperationand sumption, alowlevelofpowercon- operating costs, nomical advantages:lowinvestmentand offersarangeoftechnicalandeco- DGS The lent emergencyrunningproperties. carboncoatingfeaturingexcel- mond-like carbide againstsiliconwithdia- Combination offacematerials:silicon ting seat. dimensional UorVgroovesintherota- hed bybroadslidingfacesandthree- Theyturbo compressors. aredistinguis- were developedspeciallyforsealing series sealsoftheDGS Gas-lubricated p v – ...+200°C = –30°C t Operating limits g 1 N = ...200m/s ...120 bara = 1 = 25...320mm dd11 dH 656 ft/s (see noteonpage1)(see 15 ...1740 PSI 0.98" ...12.60" 22...392°F l 1 l 1 ds Vent Separatinggas S Flare D Buffergas C Product flushing B A Labyrinth CSRradialclearanceseal 8 7 insizetothe Housing(adapted Shaftsleeveandseatretainer 6 Spring 5 Thrust ring 4 rotating Seat, 3 Sealface,stationary 2 1 Description Item impurities reachingtheseal. from thesealingcompartmentprevents connection "A".The resultingcurrent conveyed tothesealchambervia sealed hastobefilteredinadditionand In thecaseofdirtygasesgastobe gas totheflare/vent. ge isthendischargedwiththeseparating Primaryding flare/ventconnection. leaka- arrangementwithacorrespon- sion-free Thisoptional. versionisusedasanemis- clearance sealtothebearingsideare Labyrinth tothegassideandCSRradial sors. e.g. withair, nitrogenorCO e.g. the atmospherearerecognizedassafe, Application: Whereproductleakagesto Single seal DGS installation space) l l B B Rotating seat, stationarysprings Rotating seat, 2 compres- DGS Tandem seal DGS on theproductside. full pressureisreducedonlybytheseal Innormal operatingconditionsthe tial. to absorbthecompletepressuredifferen- the sealonatmospheresideareable safety. The sealontheproductsideand ticularly highdegreeofoperational The tandemarrangementprovidesapar- safety seal. Seal ontheatmospheresideactingasa on gaspipelinecompressors. ges ofprocessgasareadmissible,e.g. Application: Wheresmallproductleaka- dd11 dH dH l l 1 3 second sealactsasasafetyseal. the vent isverylow. Ifthemainsealfails, leakage totheatmospheresideor side equalstheflarepressure,so sealed bythesealonatmosphere the flare.The pressuredifferentialtobe re sideisclearedbyaconnection"C"to duct sideandthesealonatmosphe- The spacebetweenthesealonpro- dds1s1 l l B B e.g. onH e.g. kages totheproductareinadmissible, the atmosphereaswellbuffergaslea- Application: Whereproductleakagesto intermediate labyrinth Tandem sealwith DGS pressors. d2 dH 2 , ethyleneorpropylenecom- l 3 l 3 outlet. rent flowsviathelabyrinthtoflare sure ofthebuffergasensuresthatacur- viaconnection"B".Thegen orair) pres- side ispressurizedwithbuffergas(nitro- to theflare.The sealontheatmosphere leakage isdischargedviaconnection"C" the productside.The entireprocessgas to besealedisreducedviathesealon With thisversiontheproductpressure ddS1s1 l l B B no flare.Typicalapplicationsaretobe gas ofsuitablepressureisavailablebut This seal isusedwhenaneutralbuffer admissible (buffer pressurep admissible (buffer gas leakagesintotheproductmustbe the atmosphereareinadmissible.Buffer Application: Whereproductleakagesto Double seal DGS 190 180 165 160 155 150 145 140 170 118 113 300 290 280 260 250 240 230 220 0 21 200 135 130 123 108 103 270 d 98 93 88 83 68 63 56 49 78 73 n d2 dH 8 7 2. 7 9 7014015032.5 175.0 32.5 32.5 154.0 175.0 32.5 87.0 165.0 32.5 154.0 165.0 390 32.5 145.0 87.0 155.5 145.0 378 82.0 145.5 370 32.5 138.0 82.0 360 322.2 129.0 77.0 358 145.5 350 276 72.0 348 335 302.2 129.0 338 317 284 292.2 256 72.0 323 282.2 246 313 271.3 264 297 236 255 261.3 228 293 245 218 235 241.3 225 198 205 a.mx i.mn i.mn i.min. min. min. min. min. min. max. max. 9 8 3. 8 8 7010015532.5 32.5 135.5 130.5 120.0 118.0 67.0 64.0 287 277 283 273 231.3 221.3 188 178 195 185 6 6 0. 5 5 9519011032.5 32.5 121.0 32.5 121.0 29.5 109.0 121.0 29.5 109.0 121.0 59.5 109.0 29.5 59.5 113.0 109.0 257 59.5 113.0 29.5 247 99.0 59.5 29.5 253 99.0 242 113.0 29.5 243 237 55.5 113.0 201.4 55.5 238 99.0 113.0 191.4 233 99.0 222 227 161 186.4 55.5 99.0 151 181.4 55.5 218 223 168 216 146 55.5 158 211 175.5 141 212 170.5 153 206 138 207 148 165.5 133 202 144 160.5 128 139 155.5 123 134 118 129 124 0 618615195. 5514529.5 104.5 95.5 51.0 179 175 128.6 96 102 7 7 1. 6 6 4018010532.5 130.5 118.0 64.0 267 263 211.4 171 178 7 6 1. 6 8 7014015032.5 175.0 154.0 87.0 380 368 312.2 266 274 0 0 3. 8 8 109. 0. 29.5 104.5 95.5 51.0 184 180 133.6 101 107 1 0 5. 0 0 2019015532.5 145.5 129.0 72.0 307 303 251.3 208 215 1 1 5. 9 0 259. 0. 29.5 29.5 108.0 108.0 99.0 99.0 52.5 52.5 201 189 197 185 150.5 138.6 113 106 119 112 28 1. 6 6 109. 0. 29.5 104.5 95.5 51.0 169 165 118.6 86 92 27 0. 5 5 109. 0. 29.5 104.5 29.5 95.5 25.5 98.0 25.5 51.0 98.0 89.0 81.0 25.5 159 89.0 48.0 73.0 81.0 155 48.0 143 108.7 40.0 73.0 138 139 76 133 134 40.0 93.8 129 82 115 88.8 61 83.9 111 56 68 52 69.9 63 58 38 44 d 87 0. 4 5 109. 0. 29.5 29.5 104.5 98.0 95.5 89.0 51.0 48.0 153 148 149 144 103.7 98.7 71 66 78 73 79 2. 7 7 109. 0. 29.5 104.5 29.5 95.5 104.5 51.0 95.5 174 51.0 170 164 123.6 160 25.5 91 113.7 81.0 97 81 73.0 87 40.0 106 102 61.7 31 37 14 6818124. 308. 25.5 81.0 73.0 40.0 122 118 76.8 45 51 s d s1 Burgmann Mechanical SealsDesign Manual15.3 d H 3 > p 1 d ). 1 l l 2 2 d other parttotheproduct. escapes totheatmospheresideand sure. Onepartofthebuffergasleakage higher pressurethantheproductpres- ween thesealsviaconnection"B"ata isfedbet- nitrogen, e.g. A buffergas, onHCgascompressors. stry, e.g. found mainlyinthepetrochemicalindu- 2 ds l 1 l 2 l l B B l 3 l B DGS 77 Elastomer-free PDGS / TDGS PDGS TDGS Elastomer-free, gas-lubricated com- Elastomer-free, gas-lubricated metal pressor seal for high pressure and low bellows seal for single-stage steam pressure applications. The secondary turbines. The TDGS impresses with its sealing elements specially developed by wear-free operation and extremely low Burgmann for this purpose are particular- leakage rates. ly effective in terms of automatic align- ment and resistance to extrusion, tempe- Advantages rature and chemicals. The operational No steam condensate in the bearing oil reliability of the PDGS is accordingly very reduction of the temperature gradient high. between the seal and the bearing Available as a single, tandem and double higher efficiency seal of cartridge design. no or only minimal changes to the tur- bine necessary for conversion Special features amortization in less than 1 year no explosive decompression due to the use of a special PTFE compound Special features controlled sliding forces prevent "cat- stationary metal bellows ching" of the dynamic secondary seal; combination of face materials back-up ring and balancing sleeve SiC-Si/carbon graphite made of tungsten carbide Statotherm® secondary seals Material in compliance with NACE bellows made of Inconel® Optimal aerodynamic gas grooves open gas seal grooves ensure maximal stability of the gas (with self-cleaning effect resp. no film A dynamic clogging with contaminants) Diamond-coated sliding face secondary seal suitable for pressure reversals made of special (vacuum mode) PTFE compound, designed as a cartridge unit Operating limits (see note on page 1) with back-up ring bereic and balancing d = 25 ... 320 mm 0.98" ... 12.60" w sleeve, of the type Operating limits (see note on page 1) p1 = 1 ... 350 bara 15 ... 5076 PSI used in the PDGS. t = –170°C ...+230°C –274...446°F d = 20 ... 180 mm 0.79" ... 7.09" 656 ft/s w vg = ... 200 m/s p1 = 25 bar 363 PSI t = –50°C ...+450°C –58...842°F vg = ... 130 m/s 427 ft/s 78 Burgmann Mechanical Seals Design Manual 15.3 CSR / SMS PDGS/TDGS/CSR/SMS CSR SMS Gas-lubricated radial clearance seal Seal Management System for compressors, gas turbines and other Today, more than 80% of all process gas-conveying machines.The aerodyna- machines in turbo compressor construc- mic CSR consists of a segmented carbon tion are equipped with gas seal systems graphite ring with a circumferential comprising a gas-lubricated seal and a spring. Pockets worked into the inner control system. The seal is buffered with face produce a radial lifting force, auto- clean inert gas to ensure reliable opera- matically resulting in a concentric gap tion. Volumes of leaking gas are monito- of a few micrometers. In standstill mode red, regulated and discharged in a con- the seal and the shaft are in contact with trolled manner to ensure the seal’s cor- each other and have a good static seal- rect and efficient operation. The comple- ing effect. te Burgmann sealing system comprises of the DGS dry gas seal and the SMS. For Features economical reasons a standard SMS is Contact-free operation with aero-dyna- available which can be easily adapted to mic groove pattern. meet customers requirements. Reduced gas consumption due to an extremely narrow gap. The SMS performs the following func- Segmented high duty salt-impregnated tions: Electrographite Carbon ring. Inside a CSR-U Clean gas module: Schematic diagram: High start/stop wear resistance due to radial clearance Supply of flushing gas Operating principle hard faced running surface such as, seal, independent To prevent soiling of the sliding faces, Example of a gas Buffer gas module: supply system with Tungsten Carbide. of the direction of rotation Supply of buffer gas gas is drawn from a higher pressure differential pressure Comes as a ready-to-fit cartridge unit. Fig. top: Leakage module: stage of the compressor, is filtered and regulation for a tandem gas seal Cartridge version Monitoring of leakage injected onto the gas seal as clean "flus- of the CSR radial hing gas". The leakage from the first gas with intermediate Operating limits (see note on page 1) clearance seal, Separation gas module: labyrinth. dependent on the Monitoring of buffer seal seal stage is discharged to the flare for DN = 17 ... 320 mm direction of rotation disposal. To prevent bearing oil from con- Photo below: SMS panel for an p2 dynamic = 1.5 ... 2.2 bara taminating the gas seal, a further nitro- p static = up to 11 bara gen or air buffer ("separating gas") is ammonia compres- 2 sor (Sulzer Turbo). vg = 10 ... 200 m/s provided between the bearing and the t = –20 ... +200 °C gas seal. Barrier gas = Air or Nitrogen Barrier gas dew point at operating pressure = –50 ... +20 °C Runout of assembled shaft: 20 µm Max. vibration peak to peak (in the area of the compressor bearing): Smax = 3.5 · 25.4 12000/nmax Smax = 275 µm (short term) Burgmann Mechanical Seals Design Manual 15.3 79 Welcome to our sealing world www.burgmann.com To supply a good product Leakproof is one thing. But what happens next...? The range of services offered by Burg- mann goes way beyond the for a clean norm: from engineering, standardizations, applica- tion tests, installation, repairs, failure and damage analyses and seminars on environment. sealing technology for your staff right through to software (SPIR) for flexible, economical replacement- part management. 80 Burgmann Konstruktionsmappe 15.3 MixersAgitators, Mixers, Reactors 81 Mechanical Seals for Agitators, Mixers, Kneaders and Reactors For top entry drives to DIN, PN 16 M481 (for steel/stainless steel tanks) 82 M461 (for glass-lined tanks) ...... 84 For top/bottom/side entry drives MR-D ...... 86 MR33-D (for sterile processes) . . . . 87 HSMR33..-D (for sterile processes) . 87 For top entry drives up to PN40 HS-D ...... 88 For top/bottom entry drives up to PN250 HSH-D ...... 89 Extras STD shut-down seal ...... 90 Special features ...... 90 Code system ...... 90 Burgmann Mechanical Seals Design Manual 15.3 81 For top entry drives to DIN M481 Designation and posi- tion of screwed con- nections*), pull-off threads and jacking threads according to DIN 28138 part 3. Swung out after fitting the seal Unbalanced M481K M451 range Independent Single seal All types of the M481 range available of direction of rotation for straight, non-collared shafts (all Cartridge unit M481KL diameters). Seal identification: M451...! Connections according Single seal with integrated floating Customized design or e.g. different to DIN bearing drives (torque transmissions) are possi- ble. Agitator seals of the M481 range are fac- Operation of single seals only with tory assembled and tested units. For use pressureless quench on carbon steel and stainless steel ves- Gas-lubricated sliding faces sels in conformance with DIN 28136. Item no. Description Agitator seals of the 481 range are also The fitting dimensions of the mounting 01 Seal face, available as gas-lubricated versions for flanges are in accordance with DIN on the atmosphere side DIN connections (AGS 481K-D, AGS 28141. The sleeve dimensions comply 02 Seal face, 481KL-D). See page 66 and page 74. with shaft details given in DIN 28154. on the product side Torque transmission (according to DIN 06 O-ring only by clamp connections) and additio- 07 O-ring nal options conform to the code system 11 Stationary seat, page 90. on the product side 12 Stationary seat, on the atmosphere side Operating limits DIN 28138 13 O-ring Part 1 (see note on page 1) 14 O-ring d = 40 ... 220 mm 15 O-ring 1 34 Shaft seal p1 = vacuum ... 6 bar (M 481 K-D = and M481KL-D: up to 16 bar) t1 = –30 (–80 °C...+200 (350) °C = –22 (–112) °F ...+392 (662) °F = (M481K and M481KL: = up to 150 (250) °C v = 2 (5) m/s 6.6 (16.4) ft/s g *) For reasons of standardization, the supply connections of single seals are matched to those of the double seals (in deviation from DIN 28138T3). 82 Burgmann Mechanical Seals Design Manual 15.3 M481K-D Operation is optionally the same as for the single version (pmax = 6 bar or ⌬ Double seal M481 pmax = 6 bar at p1 > p3). In view of the mechanical seal on the atmosphere M481KL-D side it can be used as a buffer pressuri- Double seal with integrated floating zed double seal p1 = 16 bar. bearing These seals are designed to be self-clo- sing on the product side, i.e. they will remain closed even with pressure varia- tions or a pressure reversal. d31) d71) d1 n x d2 d4 d0 лkL1 L2 Lw2) I1 I2 aM1 M2 A, B 40 38 175 4x18 110 90 145 110.5 159.5 143 15 28 122 M12 M16 G3/8 50 48 240 8x18 176 135 210 114.5 174.5 148 17 28 157 M12 M16 G3/8 60 58 240 8x18 176 135 210 119.0 181.5 158 17 28 168 M12 M16 G3/8 80 78 275 8x22 204 155 240 133.0 217.5 168 20 34 203 M16 M20 G1/2 100 98 305 8x22 234 190 270 137.5 218.5 178 20 34 228 M16 M20 G1/2 125 120 330 8x22 260 215 295 138.5 233.5 203 20 40 268 M20 M20 G1/2 140 135 395 12x22 313 250 350 152.5 250.5 208 20 40 285 M20 M20 G1/2 160 150 395 12x22 313 265 350 161.0 253.0 213 25 40 297 M20 M20 G1/2 180 170 445 12x22 364 310 400 166.0 263.5 233 25 45 332 M24 M20 G1/2 200 190 445 12x22 364 310 400 171.0 271.0 243 25 45 352 M24 M20 G1/2 220 210 505 16x22 422 340 460 263 25 M24 M20 G1/2 1) Shaft diameters d3 and d7 to DIN 28154 2) Shaft step to DIN 28154 Burgmann Mechanical Seals Design Manual 15.3 83 For top entry drives to DIN M461 Designation and position of screwed connections, extract or thread and jacking thread according to DIN 28138 Part 3. Flange connection to DIN 28138 Part.2 for nominal sizes of 40 to 100 For glass-lined vessels M461K-D These seals are designed to be self-clo- Unbalanced Double seal sing on the product side, i.e. they will Independent remain closed even with pressure varia- of direction of rotation M461KL-D tions or a pressure reversal. Operation optional as single seal (p1 max Cartridge unit Double seal with integrated floating = 6 bar or ⌬ pmax = 6 bar at p1 > p3. Connections to DIN bearing In view of the mechanical seal on the Vessel seals of the M461 range are fac- atmosphere side, it can be used as a tory assembled and tested cartridge M56K(L)-D buffer pressurized double seal (p1 max = 16 bar). units ready for fitting in special applicati- Double seal with/without a floating bear A ceramic intermediate sleeve is provi- ons on glass-lined vessels to DIN ing for PN25 (please refer to Burgmann ded on the product side. This enables a 28136. The fitting dimensions of the for special version). Not illustrated. mounting flange are in accordance with pressure test of the seal cartridge to be DIN 28137 Part 2. The sleeve dimen- made before assembly. sions comply with shaft details given in Item Description Due to the specific configuration of the DIN 28159. All parts exposed to the 1 Seal face, atmosphere side seal flange, the seal can be lifted off product are of non-metallic construc- 2 Seal face, product side the glass-lined flange ring as a complete tion. Torque transmission (acc. to DIN 6 O-ring cartridge. The sensitive glass lined flange only by clamp connections) and addi- 7 O-ring remains mounted on the vessel. This tional options (with the exception of 11 Seat, product side avoid any damaging of the glass lined leakage drain) conform to the code 12 Seat, atmosphere side surface. system on page 90. 13 O-ring 14 O-ring Gas-lubricated sliding faces 15 O-ring Agitator seals of the 461 series are also Operating limits to DIN 28138-T2 34 Lip seal available as gas-lubricated versions for Part 2 (see note on page 1) DIN connections (AGS 461 K-D, AGS d3 = 40 ... 160 mm 1.6" ... 6.3" 461 KL-D). See page 66 and page 74. p1 = vacuum ... 16 bar vac...230 PSI = M461K(L) ... 6 bar 87 PSI t = –30 (–80) °C ...+200 (250) °C = –22 (–112) °F ... +392 (482) °F vg = 2 (5) m/s 6.6 (16.4) ft/s 84 Burgmann Mechanical Seals Design Manual 15.3 Flange connection to DIN 28138 Part 2 for nominal size 125 to 161. Nominal Flange 1) 1) 2) 2 d3 d7 size size d1 nxd d4 nxd5 d6 d7 лk1 лk2 L1f L2l l1 l2 I3 l4 l5 M1f M2f A,Bn 40 38 40 E125 175 4x18 110 – – 102 145 – 142 184 25 35 28 50 50 M12 M16 G3/8 50 48 50 E200 240 8x18 176 – – 138 210 – 147 195 25 40 28 50 50 M12 M16 G3/8 60 58 60 E250 275 8x22 204 – – 188 240 – 158 203 25 42 28 50 60 M12 M20 G3/8 80 78 80 E300 305 8x22 234 – – 212 270 – 170 240 30 45 34 60 60 M16 M20 G1/2 100 98 100 E400 395 12x22 313 – – 268 350 – 177 240 30 52 34 60 60 M16 M20 G1/2 100 98 100 E500 395 12x22 313 – – 268 350 – 177 240 30 52 34 60 60 M16 M20 G1/2 125 120 125 E700 505 4x22 422 12x22 320 306 460 350 208 266 30 75 40 60 80 M20 M20 G1/2 140 135 140 E700 505 4x22 422 12x22 320 306 460 350 223 282 30 79 40 60 80 M20 M20 G1/2 1 160 150 160 E700 505 4x22 422 12x22 320 306 460 350 228 282 30 77 40 60 85 M20 M20 G /2 M461 160 150 160 E900 505 4x22 422 12x22 320 306 460 350 228 282 30 77 40 60 85 M20 M20 G1/2 160 150 161 E901 565 4x26 474 12x22 370 356 515 400 228 282 30 77 40 60 85 M20 M20 G1/2 1) Shaft diameters d3 and d7 to DIN 28159 2) Flange size to DIN 28137T2 Burgmann Mechanical Seals Design Manual 15.3 85 For top, bottem and side entry drivers MR-D Double seal MR..-D Gas-lubricated sliding faces Independent of direction MR..L-D Agitator seals for the MR-D series are also available as gas-lubricated designs of rotation with integrated floating bearing (AGSR) for comparable applications as Rotating seat well as for sterile duty. Cartridge unit HSMR..(L)-D (Also refer to page 75) Agitator seals of the MR-D range are rotating seat (Item 1) on product ideal for applications involving sticky, side, with hydrodynamic grooves pasty and dry media. They have been used successfully for many years already Item Description (materials) to seal all kinds of mixers, dryers, mills, 1 Seat, product side mills, masticators and reactors in the pla- (U2, Q1, Q2) stic, paint, food and pharmaceutical indu- 2O-ring stries. 3 Seal face, productside The inboard seal features a rotating seat (A, B, V, Q1, Q2) with a smooth profile without crevices 4 Seal face, atmosphere side where product can lodge and cause con- (S, Q1, Q2) tamination. A special version is suitable 5O-ring for large axial shaft movements (up to 6 Seat (B, A, Q , Q ) 500 mm) and shaft deflections (please 1 2 enquire). Operating limits (see note on page 1) d1 = 15 ... 200 (500) mm = 0.59" ... 7.87" (19.69") p1 = vacuum ... 14 (23) bar 203 (334) PSI p3 = 16 (25) bar 232 (363) PSI ͬp (p3 – p1) = max. 6 (10) bar, min. 2 bar max. 87 (145) PSI, min. 2 bar 29 PSI t = –20 °C ... +200 (300) °C == –4 °F ... +392 (572) °F vg = 10 (20) m/s 33 (66) ft/s 86 Burgmann Mechanical Seals Design Manual 15.3 polished MR333.-D The MR333 series satisfies all criteria for sterile processes: polished faces on the Version for sterile processes MR-D product side, smooth surface structure MR333.L-D without crevices. with integrated floating bearing Materials HSMR333.-D CiP/SiP-resistant and in accordance with Rotating seat on product side, with hydro- FDA guidelines. Connections as aseptic dynamic grooves. threaded couplings, e.g. according to Operating limits, dimensions, items and DIN 11851. descriptions same as MR-D. dN dw d1 d2 d3 d4 l1 l2 l3 l4 l5 l6 l7 A, B C n x d6 The MR5LF-D with 3 1 integrated bearing 30 20 52 117 140 118 22 30 114 30 35 75 41 G /8 G /8 6 x 12 3 1 and directly moun- 35 25 58 124 150 128 22 30 127 30 35 85 41 G /8 G /8 6 x 12 3 1 ted chopper (knife 40 30 62 134 165 138 24 30 129 30 35 87 41 G /8 G /8 6 x 12 mill) for tanks with 3 1 45 35 68 140 175 148 24 30 130 30 35 87 41 G /8 G /8 6 x 12 bottom entry drive. 3 1 50 40 75 146 175 148 26 30 133 34 35 90 41 G /8 G /8 8 x 12 3 1 55 45 82.7 150 175 148 26 30 135 34 35 90 41 G /8 G /8 8 x 12 3 1 65 50 90 170 195 168 30 30 160 34 41 105 41 G /8 G /8 8 x 12 3 1 70 55 95 175 205 178 30 30 160 34 41 105 41 G /8 G /8 8 x 12 3 1 75 60 100 180 205 178 30 30 160 34 41 105 41 G /8 G /8 8 x 12 3 1 80 65 110 190 220 188 30 40 190 44 41 105 41 G /8 G /8 8 x 14 3 1 85 70 115 195 230 198 30 40 190 44 41 105 41 G /8 G /8 8 x 14 3 1 90 75 120 200 230 198 30 40 190 44 41 105 41 G /8 G /8 8 x 14 3 1 100 80 130 210 240 208 30 40 190 44 41 105 45 G /8 G /4 8 x 14 1 1 105 85 135 215 250 218 30 40 190 44 41 105 45 G /2 G /4 8 x 14 1 1 110 90 140 230 260 228 31 40 190 44 41 110 45 G /2 G /4 8 x 14 1 1 115 95 145 235 270 238 31 40 190 44 41 110 45 G /2 G /4 8 x 14 1 1 120 100 150 240 270 238 31 40 200 44 42 120 46 G /2 G /4 8 x 14 1 1 130 110 160 255 290 258 31 40 200 50 42 120 46 G /2 G /4 8 x 14 1 1 140 120 172 265 305 268 41 50 220 50 43 130 46 G /2 G /4 8 x 18 1 1 150 130 185 275 315 278 41 50 220 50 43 130 46 G /2 G /4 8 x 18 1 1 160 140 195 290 335 298 41 50 220 50 43 130 46 G /2 G /4 8 x 18 1 1 170 150 205 300 335 298 45 50 220 50 47 130 46 G /2 G /4 8 x 18 1 1 180 160 220 330 355 323 45 50 250 50 47 140 46 G /2 G /4 8 x 18 1 1 190 170 230 343 375 358 45 50 250 55 47 140 46 G /2 G /4 8 x 18 1 1 200 180 240 363 395 358 45 50 250 55 47 140 51 G /2 G /4 8 x 18 1 1 220 190 270 393 425 388 45 50 250 55 50 140 51 G /2 G /4 12 x 18 1 1 230 200 280 393 425 388 45 50 300 55 50 160 51 G /2 G /4 12 x 18 Burgmann Mechanical Seals Design Manual 15.3 87 For top entry drives HS-D Swung out after fitting the seal HS-D HSL-D Double seal HS ... -D Operating limits (see note on page 1) Independent Double seal, unbalanced. 0.8" ... 20" of direction of rotation dw = 20 ... 500 mm HSL-D p1 = vacuum ... 25 (40) bar Cartridge unit = vac. ... 362 (580) PSI Double seal, unbalanced, with integrated Agitator seals of the HS-D range are t = –30 (80) °C ... +200 (350) °C floating bearing. designed for medium-to-high pressure = –86 (176) °F ... +392 (662) °F applications. HS(L)-D, unbalanced, for Item no. Description vg = 5 m/s 16.5 ft/s up to PN25. Operation only with pres- 1 Stationary seat surised buffer fluid. The code system 2 O-ring’s shown on page 90 does not apply, 3 Seal face but the additional options and drives 4 Seal face housing described on page 90 are available. 5O-ring Please specify separately. 6 Stationary seat on the atmosphere side dw d1s n x d2 d3l лkL1n L2n I3l I4l 40 200 6 x 18 80 170 115 170 35 45 50 230 8 x 18 100 200 120 185 35 55 60 255 8 x 18 120 225 140 210 35 60 80 295 8 x 23 145 260 145 230 44 60 100 315 8 x 23 170 280 160 245 44 65 120 345 8 x 23 190 310 160 250 50 65 140 380 12 x 23 215 345 165 265 50 65 160 440 12 x 27 240 395 185 300 50 75 180 475 12 x 27 260 430 185 310 55 75 200 465 12 x 27 290 420 190 290 55 75 88 Burgmann Mechanical Seals Design Manual 15.3 For top and bottom entry drives, plain shafts HSH-D Agitator seals of the HSH-D range are designed and built specially for high- pressure applications. They are operated solely with pressurised buffer fluid. Dimensions available on request. Operating limits dw = 20 ... 350 mm 0.8" ... 13.8" p1 = ... 250 bar*) ... 3625 PSI t = –30 (–80) °C ... 200 (350) °C = –22 (–176) °F ... 392 (662) °F *) according to the size as from 100 ... 150 bar tandem seal design (pressure reduction in 2 stages) Top entry drive HSH(V)-D Balanced Double seal HS-D/HSH-D Independent of direction of rotation HSH(V)L-D Cartridge unit Double seal with integrated floating be- Hydraulically balanced aring (axial thrust bearing on request) stationary seats Agitator seal of the HSHU-D range are typical of the kind often used in the pro- duction of plastics. On the product side the combination of floating throttle ring (1) and flush (D) prevents plastic pow- der entering the primary sealing area. Operating limits (see note on page 1) (guide values) dw = ... 350 mm ... 13.8" p1 = 60 bar 870 PSI t = –60 ... +200 °C = –76 °F ... +392 °F Bottom entry drive HSHLU-D Balanced Double seal for bottom entry drive Independent of direction of rotation Cartridge unit Burgmann Mechanical Seals Design Manual 15.3 89 Vessel seals Optional extras Additional options Shut-down seal (vessel containment) Cooling flange tmax = 350 °C Leakage drain (can also be used as a heating flange) (can also be used as a flush) STD1 If an STD is employed, it is possible to change seals with the vessel loaded and under pressure (shaft must be stationary!) This seal is only used if the product does not harden or con- geal during the shut down period. It cannot be used if PTFE is required or for sterile operation (fermenting vessels). Can be installed in all aspects. Fitting dimensions in accor- dance with DIN 28138 Part 1 are possible. Operating limits d3i Dr dn d1 lm bi d = 40 ... 200 mm 40 76 42.5 42 38.0 8 Leakage drain and cooling flange Polymerization buffer w = 1.6” .. 8” 50 84 52.5 52 38.0 8 (can also be used as a 60 95 62.5 62 44.5 10 p = 16 bar 232 PSI leakage drain or flush) 1 80 118 82.5 82 45.0 10 t = 100 °C 212 °F 100 138 102.5 102 45.0 10 Elastomer sealing ele- 125 160 127.5 127 45.0 10 ment (Item no. 1) with 140 180 143.5 143 50.0 12 Types of drive pneumatic or hydraulic 160 200 163.5 163 50.0 12 actuation (closing pres- 180 215 183.5 183 50.0 12 200 240 203.5 203 50.0 12 sure p4 >p1). Code system for DIN seals M.... – ... / dw –.. Clamping set Clamping ring Range Customer- (M45 ... 56) specification Shaft diameter 1)Features K = Internally balanced K = (pressure from the inside) L = with bearing F = pumping screw Additional options U = for bottom entry 0 – basic design Type 1 – leakage drain D = double seal 2 – cooling flange 4 – leakage drain + cooling flange Shrink disk Clamping ring Drive 1 – set screw Screwed connections 2 – shrink disk 1) If several features apply, the code 3 – clamping collar letters are listed one after the other. Extract or thread Designation and position in accordance 4 – key 5 – flange (shaft sleeve) with DIN 28138 T3. N.B.: The code sysem published in 6 – shaft sleeve with flange and key DIN 28138 Part 3 can also be used 7 – clamping set A = Buffer fluid resp. quench IN to describe and order DIN agitator 8 – muff coupling B = Buffer fluid resp. quench OUT seals. 9 – customer-specification C = Drainage D = Leakage drain G1/8 E = Coolant IN G3/8 F = Coolant OUT G3/8 Jacking thread G = Grease point Extract or thread segment 90 Burgmann Mechanical Seals Design Manual 15.3 SupplySupply Systems 91 Supply Systems and Components for Liquid-lubricated Mechanical Seals Function and technology data . . .92/93 QFT quench system ...... 94/95 TS1000 thermosiphon system . . . . . 96 TS2000 thermosiphon system . . . . . 97 TS3016 thermosiphon system ...... 98 TS3000 thermosiphon system . . . . . 99 TS6050 thermosiphon system . . . . 100 DRU2000 pressure booster ...... 101 SPU circulating pump ...... 102 SPN manual refill pump ...... 102 SP23-... measuring unit ...... 102 SPI measuring unit ...... 103 SPL level indicator ...... 103 SPS level switch ...... 103 SPK contact unit ...... 103 SPN1000/3000 refill units ...... 104 HPS screw pump ...... 105 WDK heat exchanger ...... 105 WED, WEL heat exchanger ...... 106 ZY cyclone separator ...... 107 MAF magnetic filter ...... 108 MAA magnetic separator ...... 108 SPA/SPO buffer fluid system . . . . . 109 DHE pressure retaining unit ...... 110 DRE pressure control unit ...... 110 VTE distributor unit ...... 110 Burgmann Mechanical Seals Design Manual 15.3 91 Seal Supply systems Circulation In some cases, for mechanical As operational demands increa- Buffer systems seals to function correctly the se, so too must the capabilities of For single seals it is generally advisable conditions in which they operate the supply units to support the To guarantee the correct working of dou- to install a circulation pipe from the dis- must be altered. This depends on mechanical seal. ble mechanical seals, the buffer inter- charge nozzle of the pump to the seal the seal type, the duty conditions The following section contains the space (between the product side and the chamber. A pipe size G 1/4 is normally including environmental protec- necessary information for the atmosphere side of the mechanical seal) sufficient. There should be a close fitting tion, and the type of equipment correct selection of supply sys- must be completely filled with clean buf- neck bush between the pump casing and into which the seals are fitted. tems and auxiliary equipment to fer medium. the seal chamber. A simple change to a single seal's ensure reliable operation of your Before starting up double mechanical operating conditions in a dead-end mechanical seals. seals it is vital, therefore, to ensure a suf- arrangement can be made, for ficient rate of circulation of the buffer Flushing instance, by adding a recirculation fluid The buffer fluid pressure should lie line from the pump discharge to 10 % or at least 1.5 to 2 bar above the Flushing systems are installed in accor- the seal chamber (API Plan 1). maximum pressure to be sealed. The flow dance with DIN ISO 5199, Appendix E, rate must be controlled to ensure that the Plan No. 08a or API 610, Appendix D, temperature of the buffer medium at the Plan 32. A clean and mostly cold external outlet lies below approximately 60°C and medium is injected into the stuffing box that it does not exceed boiling point in the area of the sliding faces via on ori- under any circumstances. The maximum fice (throttle) into the medium to be sea- acceptable inlet/outlet temperature diffe- led. Flushing is used either to lower the rential is 15 K. The buffer fluid outlet lies temperature or to prevent deposits for- at the highest point of the stuffing box for ming in the area of the mechanical seal. automatic venting of any vapour. Again it is recommanded that a close fit- In view of the basic conditions of opera- ting neck bush is employed. tion, a buffer system must perform the following functions: Quench Build-up pressure in the buffer inter space Quench is the term commonly used in Compensation of leakage sealing engineering for an arrangement Circulation of the buffer medium that applies a pressureless external med- Cooling of the buffer medium ium (fluid, vapour, gas) to a mechanical Cooling of the seal seal's faces on the atmosphere side. A quench is used on the one hand when a Buffer fluid systems for liquid-lubricated single mechanical seal does not function Burgmann mechanical seal type mechanical seals break down into two MFLWT80/S1-FD/58-E3 with thermosiphon Nitrogen at all or only within certain limits without system TS2000/M073-A1 to seal ethylene basic categories: auxiliary measures or when a double me- oxide (Sulzer pumps). chanical seal with pressurized buffer Open circuit medium is unnecessary. When an integral Cooling or heating of the outboar side A circuit in which both the circulation and stationary seat stop is fitted, the quench of the mechanical seal. the pressurization take place through a pressure should not exceed 1 bar. A single buffer fluid system (e.g. SPA). gas/g solvent quench performs at least one of the Steam quench 2 After each circuit the buffer fluid is relie- duties described below. Heating: For media with a high melt- ved and collected in a pressureless tank. ing point the vapour quench prevents the Mineral oil * Fluid quench leakage from solidifying in that area of Standard cm Closed circuit Absorption or removal of leakage by the mechanical seal critical for its proper In this type of circuit all the components Water the quench medium functioning are kept under the same pressure. Pres- Monitoring of the mechanical seal's Exclusion of air Pressure (bar) sure is applied by means of nitrogen (TS leakage rate by periodic measurement of Removal of leakage * viscositiy at 38 °C : 34.9 mm2 /s system) or the process medium pressure the level of the quench medium in the cir- (DRU system), or via a refill system culation vessel or thermosyphon vessel Gas quench Air (SPN). Pressure loss in the circuit must Lubrication and cooling of the standby Icing protection: With operating tem- be taken into account when drawing up mechanical seal peratures <0 °C (cryogenic mechanical the design. Exclusion of air: For media which react seals), the injection of nitrogen or dry air with atmospheric oxygen the queching into the seal housing prevents the medium stops the leakage making mechanical seal parts on the atmosphere contact with the atmosphere side from icing up gas/g solvent 2 Protection against dry running: For Exclusion of air Mineral oil * applications subject to brief, periods of Removal of leakage vacuum and operation of pumps without Standard cm pumping liquid (submersible pumps) the Sealing the quench medium quenching medium prevents dry running Outboard mini-gland – the preferred Water of the mechanical seal choice for steam, not so much for liquids Stabilization of the lubrication film: For Lip seals – the preferred choice for Pressure (bar) operation under vacuum and/or sealing oils and water * viscositiy at 38 °C : 34.9 mm2 /s pressures close to the vapour pressure, Mechanical seals – the preferred the quenching medium stabilizes the choice for all circulating quench fluids lubrication film 92 Burgmann Mechanical Seals Design Manual 15.3 Buffer medium Circulation Systems to API 610/682 Methylene chloride The buffer medium fulfills two functions – Clean pumping media Contaminated and special it dissipates the heat generated by the /l] 3 pumping media Plan 1 seal and it prevents the product from Plan 31 Internal circulation penetrating the sealing gap to any appre- Circulation from the from the pump case pump case through a ciable degree. Any liquid and any gas can to the seal. be chosen as buffer medium, with due cyclone separator. consideration to the corrosion resistance Plan 2 of the parts it comes into contact with Dead end seal cham- Plan 32 ber with no circulation. Injection of clean fluid Volumetric expansion [cm Water and to its compatibility with the process Stuffing box cooling into the seal chamber medium and surroundings. The buffer and a neck bush are from an external source. medium must not contain any solids. It is necessary, unless particularly important that liquid buffer otherwise specified. Plan 41 ∆t Difference between the filling Circulation from the media do not tend to precipitate and that temperature (no-load temperature) and the operating temperature (°C) Plan 11 pump case through a they have a high boiling point, a high spe- Circulation from the cyclone separator, and cific thermal capacity and good thermal pump case, through an clean fluid through a conductivity. Clean, demineralised water Volumetric expansion of various buffer orifice and to the seal. cooler to the seal. media satisfies these requirements to a high degree. Plan 12 Plan 51 Hydraulic oil is often used in buffer fluid Circulation from the Dead-end quench units and water in closed buffer fluid cir- pump discharge, (usually methanol) through a strainer and cuits. an orifice to the seal. To prevent damage to the TS and sealing Plan 52 system, due allowance must be made for Plan 13 External fluid reservoir, the coefficients of volumetric expansion Circulation from the pressureless, thermo- of the buffer fluids used. seal chamber, through siphon or forced circu- an orifice and back to lation as required. pmp suction. Plan 21 Plan 53 Systems and Components Circulation from the External fluid reservoir, pump case, through pressurized, thermo- an orifice and a cooler syphon or forced circu- The table shows which systems and/or also play a key role in selection. It is to the seal. Seal Supply Systems components we recommend for the imperative, therefore, to consult one of lation as required. various operating modes of mechanical Burgmann’s experienced specialists befo- Plan 22 seals to conform with the most common re taking any final decisions about an Circulation from the Plan 53A API plans. application for which you have inadequa- pump case, through a Circulaton with thermo- The actual operating and duty conditions te experience. strainer, an orifice and siphon system, pressu- a cooler to the seal. rized. Forced circula- tion by pumping ring or Type Circulation system to API 610/682 Plan ... Plan 23 circulation pump. Circulation by means of Page 21 22 23 31 41 51 52 53A 53B 53C 54 a pumping ring from QFT 94 the seal, through a Plan 53B TS1000 96 cooler and back to the Circulation with bladder TS2000 97 seal. accumulator and cooler, TS3000 98 pressurized. Forced cir- TS6000 100 culation by pumping ring Systems DRU 101 or circulation pump. SPO 104 SPA 109 Plan 53C WDK 105 Circulation with pressure WED 106 Legend: booster (DRU) and coo- WEL 106 ler. Pressurized by refe- ZY 107 rence pressure of seal MAF 108 Cooler chamber. Forced circu- MAA 108 Cyclone separator lation by pumping ring HPS 105 or circulation pump. Strainer SPU 102 Flow control valve SPN autom. 104 Plan 54 SPN manual 104 Block valve Circulation of clean Components VTE 110 Nonreturn valve fluid from an external DRE 110 Orifice system. DHE 110 FI Flow indicator SPK 103 Plan 61 SPS 103 LI Level indicator Tapped connections for SPL 103 LSH Level switch MAX the customer’s use. SPI 103 LSL Level switch MIN SP23 102 PI Pressure indicator Plan 62 PS Pressure switch External fluid quench PSL Pressure switch MIN (steam, gas, water, TI Temperature indicator etc.). Burgmann Mechanical Seals Design Manual 15.3 93 Quenching fluid system QFT Quenching fluid systems are used to lubricate and to cool the out- to supply single or tandem board mechanical seal in a tan- mechanical seals. They act as a dem arrangement convenient fluid reservoir. The to prevent icing exchange of fluid takes place by to protect against dry running the thermosiphon principle or by to stabilize the lubricating film forced circulation, e.g. with a to exclude air from the media pumping screw. Quenching fluid in order to prevent a reaction with systems are employed: oxygen in the air. to absorb leakage to monitor the leakage rate (e.g. through periodic reading of the level in the tank) QFT 1000 Quenching fluid tank made of transparent polyethylene, com- plete with clips made of stainless steel. Resistant to water, glycerine, glycols and methanol; not resistant to mineral oils and toluene. Item Description 1 Storage tank (capacity 4 l) 2 Clip 3 Inlet filter with vented cap remove cap if required 4 Name plate Versions QFT 1000-A004-00 with external level indicator QFT 1000-M001-00 with threaded coupling for connecting a thick pipe Ø 10 mm Technical data Operating pressure: pressureless Operating temperature: –30 °C ... +70 °C (OFT 1000) –30 °C ... +200 °C (QFT 2000 with metal filter, QFT 3000) Connections A to the mechanical seal B from the mechanical seal C filling 94 Burgmann Mechanical Seals Design Manual 15.3 Filling filter Dead-end- and vent Quench Circulation Mechanical seal QFT 2000 Installation, modes of operation Quenching fluid tank made of stainless steel with sight-glas- Quenching fluid systems can be operated Circulation, DIN ISO 5199, Plan 10 ses for MIN/MAX levels. Lug fixture, in two different modes: (quenching fluid from an elevated tank; overflow for the selective discharge of circulation by thermosiphon action or *) leakage. Dead-end quench; DIN ISO 5199, Plan pump in the seal), and API 610 Plan 52 13, quenching fluid from elevated tanks, (external tank, pressureless; thermosi- *) Item Description and API 610 Plan 51 . The characteristic phon or forced circulation). In this case 1 Storage tank (capacity 3 l) feature of this principle is that no heat is heat is dissipated by the circulation. 2 Inlet filter with vented cap dissipated by the system. Cooling capacity by convection is minimal 3 Sight-glass or level switch however. 4 Name plate 5 Overflow G 1/8 DIN ISO 5199 DIN ISO 5199 Plan 13 Plan 10 QFT Level switch (Item 3) ... quenching fluid from ... quenching fluid from Contact points when using the level an elevated tank an elevated tank; circu- lation of the fluid by switch as a thermosiphon action or MAX contact: 1.8 l above the centre pump. of the bottom sight-glass API 610/692 MIN contact: 0.25 l above the centre Fill plug Level gauge Plan 51*) Reservoir API 610/682 dead-end quench of the return pipe When Plan 52*) (normally methanol) specified Vent Level gauge external quenching Accessories Plug Reservoir fluid tank, pressureless. Instead of the sight-glass it is possible to When spec. Thermosiphon or forced drain valve circulation if required. use a level switch to monitor the fluid *) is cited only as an example since this QFT confi- volume. guration does not comply with Section 3.4.4.9 of API Standard 610/682 MIN level SPS 2000-A051-00 MAX level SPS 2000-A052-00 QFT 1000-00 MIN/MAX level SPS 2000-A053-00 QFT 3000/ M001 QFT 1000/A004-00 Quenching fluid tank QFT 1000/M001-00 QFT 2000-00 made of stainless steel with a sight-glass QFT 2000/A001 QFT 2000/A002 for monitoring MIN level. Return flow via QFT 2000/A500 rising pipe for selective current control. QFT 2000/A501 QFT 2000/A502 Version QFT 3000-A001 with elongated QFT 3000/M001 sight-glass and filling connection via Tank material Polyethylen removable lid. 1.4571 Filling filter material Polyamid Item Description 1.4571 1 Storage tank (capacity 3 l) Sight-class material Acryl/NBR 2 Sight-glass Borosilikat/PTFE 3Lid Connection Hose 4 Vent G1/2” 5 Name plate 1/2 NPT 6 Inlet filter with vented cap Fitting for tube 10 mm Burgmann Mechanical Seals Design Manual 15.3 95 Thermosiphon system TS1000 With the Burgmann TS system it TS vessels are equipped as SPS Pressure is possible to supply buffer fluid standard with all the necessary N2 to double and tandem seal arran- connections and brackets. Sys- gauge (from PCV)* gements for a broad range of tem components (see pages applications. The buffer fluid 102/ 103) can be installed to suit flows via the rising pipe into the new requirements or seal retro- SPN vessel and is cooled. Particularly fits at a later date. with natural circulation, the level The vessel is used for the stora- Thermo- should always be higher than the ge, pressure maintenance and meter rising pipe to maintain the circu- cooling of buffer fluid in a sealing lation and to provide the speci- circuit. Design and production fied cooling capacity. according to EU Pressure Equip- SPU Connection pipes to the seal ment Directive (97/23 EG). should be designed with as little Operating and installation diagram of the resistance as possible. Use com- Mechanical TS system (mounting and operating seal pressed air or nitrogen for pres- instructions to be strictly observed). surization. * We recommend using a reverse controlled pressure control valve (PCV) View Z View Z View X View X Dimensions for TS1016/A007 Values in brackets: A003 TS1016 Technical data Thermosiphon vessel with flat ends, TS1016/A003 TS1016/A007 sight-glass for level monitoring and incor- Vessel Pipe Vessel Pipe porated cooling coil. Volume (litres) 4 0,2 8 0,2 Permissible operating pressure (bar)1 16 16 16 16 01 Buffer fluid IN (G1/2) Permissible operation temperature (°C)1 120 –60...+200 02 Buffer fluid OUT (G1/2) Operating volume MAX-MIN (Liter) 1,2 1,3 03 Cooling water IN (pipe 12 x 1.5 mm) Cooling cap. – w/o cool. water (kW)3 0,2 0,3 04 Cooling water OUT (pipe 12 x 1.5 mm) Cooling cap. – natural circulation (kW)2 1,0 1,2 1 Cooling cap. - forced circulation (kW)2 2,0 2,5 05 Filling connection with cap (G /2) 3 1 Required cooling water rate (m /h) 0,25 0,3 06 Pressure gas connection ( /4 NPT) Metal parts 1.4571 1.4571 07 Connection for level switch (G 2) Sight-glass Round sight-glass Reflex sight-glass 08 Connection for refill unit (G1/8) Borosilicate Borosilicate 09 Connection for pressure gauge Seal PTFE PTFE 1 ( /4 NPT) 1) Design data - permissible working values depend on the actual conditions of service 10 Bracket for refill unit 2) Guide lines with buffer fluid water 60 °C – cooling water/20 °C 3) Guide line with buffer fluid water 60 °C – ambient temperature 20 °C All threaded connections to DIN/ISO 228 exept for NPT connections. 96 Burgmann Mechanical Seals Design Manual 15.3 Thermosiphon system TS2000 With the Burgmann TS system it Pressure-loaded welds butt- is possible to supply buffer fluid welded or counter butt-welded by SPS to double and tandem seals. MIG and TIG process. N2 Equipped as standard with all Sockets with recessed gasket (from PCV)* necessary system connections (no contamination of the circuit and brackets. Components (pa- by thread sealant). SPI SPN ges 102/103) can be installed to Cooling water connection OUT suit new requirements or seal at the top and IN at the bottom, retrofits at a later date. The ves- for venting and draining. sel is used for the storage, pres- sure maintenance and cooling of buffer fluid in a sealing circuit. SPU Design and production according tu EU Pressure Equipment Direc- tive (97/23 EG). Operating and installation diagram of the TS 2000 system (mounting and ope- Mechanical seal rating instructions to be strictly obser- ved). * We recommend using a reverse controlled pressure control valve (PCV) TS1000 / 2000 TS2000 11 Buffer fluid IN (G1/2)1 Technical data 1 Thermosiphon vessel 12 Buffer fluid OUT (G /2) 1 Volume: 9 litres Pressure vessel with torispherical 13 Cooling water IN (G /2 B) 1 Cooling coil volume: 0.5 litres heads, sight-glass for level monitoring 14 Cooling water OUT (G /2 B) 1 Permissible operating pressure: and incorporated cooling coil. (All 15 Filling connection with plug 1(G /2) 30 (20)3 bar threaded connections to DIN/ISO 228. 16 Pressure gas connection (G 172) 63 (52)3 bar Assembly holes also in accordance 17 Connection for level switch or level1 indicator (G 2) Permissible operating temperature: with DIN 28162). 1 18 Connection for refill unit (G1/8) –60 ... +200 °C Net weight approx. 15.5 kg 3 19 Universal connection (G1/2 for (–29 ... +160 °C ) TS 2001 safety valve, flare, etc.) Working volume MAX-MIN: 1.8 litres Thermosiphon vessel 10 Bracket for refill unit Cooling capacity - natural circulation: without cooling coil. 11 Sight-glass 1.5 kW Net weight approx. 12.5 kg Cooling capacity - forced circulation: 4 kW TS 2063/A002 3 Thermosiphon vessel Required cooling water rate: 0.4 m /h with cooling coil. Metal parts: 1.4571 Net weight approx. 28.5 kg Sight-glass: Borosilicate Seals: PTFE TS 2063/A001 Thermosiphon vessel 1) Design data - permissible working values without cooling coil. 2) depend on the actual conditions of service 2) Guide lines with buffer fluid water 60 °C – Net weight approx. 26 kg 2) cooling water 20 °C 3) Limit values according to ASME Section VIII 2)calculation 4) Guide line with buffer fluid water 60 °C – 2) cooling water 20 °C Burgmann Mechanical Seals Design Manual 15.3 97 Thermosiphon system TS3016 The Burgmann TS 3016/A001 ses fitted on opposite sides ena- N thermosiphon system presents a ble optimum reading of the fluid 2 SPS (from PCV)* simple and quick way to clean level. It is also possible to flush Pressure the vessel interior. For this pur- the piping system and the seal gauge pose it is designed for easy dis- without disconnecting the tubes. mantling. A quick-release cou- pling should be used to connect the pressure gas to the vessel. To clean the inside of the vessel you simply have to open the union nut, disconnect the gas supply and the level switch, and lift off the vessel case. There is no need to dismantle the seal Operating and installation diagram of connections, cooling water con- the TS 3016 system (mounting and opera- Mechanical nections or base. Two sight-glas- ting instructions to be strictly observed). seal * We recommend using a reverse controlled pressure control valve (PCV) View A View B TS3016 Features Technical data Thermosiphon vessel Flat heads with cooling coil Two sight-glasses on opposite sides Max. pressure: Vessel 16 bar for monitoring the level Cooling coil 16 bar 1 N1 Buffer fluid IN, G /2” Easy dismantling Max. Temperature: 150 °C 1 N2 Buffer fluid OUT, G /2” Easy cleaning of the vessel interior Volume: Vessel 4.0 litres N3 Cooling water IN, pipe 15 x 1.5 mm All connections for essential auxiliary Cooling coil 0.4 litres N4 Cooling water OUT, pipe 15 x 1.5 mm components Cooling capacity: N5 Level switch, G 2" Natural circulation 1.0 kW 1 N6 Auxiliary components, G /2” Design, pressure test Forced circulation 2.0 kW 1 N7 Auxiliary components, G /2” Design, material selection and testing Net weight: 12 kg 1 N8 Filling connection, G /2” in accodance to the German Pressure Metal parts: 1.4571 1 N9 Drain, G /2” Vessel Regulations and the AD Code. Sight-glass: Borosilicate Test pressure = 1.3 · max. permissible Gaskets: PTFE Test pressure = operating pressure Welding filler: 1.4576/1.4430 98 Burgmann Mechanical Seals Design Manual 15.3 Supply system for sterile operation TS3000 Thermosiphon systems of the TS system and the seal circuit). For 3000 range are designed spec- the duration of the sterilization ially for the operation and supply cycle (approx. 30 minutes), the of mechanical seals in sterile shut-off valve (2.3) is closed processes. In addition to perfor- just enough to make most of the ming the four basic functions of steam flow via the seal. a buffer system, the TS 3000 Making condensate can also be used to make con- At the end of the sterilization densate, provided it is connected cycle, valve 2.4 is closed, valve up to a steam line. 2.3 is fully opened, and the coo- Sterilization ling water supply is switched on After the agitator drive and the again – condensate will be cooling water supply are swit- made. The level switch (3) res- ched off, the condensate drain ponds when the TS vessel is full. valve (2.4) is opened until steam The agitator can be started up emerges (the steam forces the again. entire condensate out of the TS A Buffer fluid IN B Buffer fluid OUT C Steam connection D Cooling water IN E Cooling water OUT Operating and installation diagram of the TS3000 system (mounting and operating instructions to be strictly observed). TS3000 / 3016 TS3007/M301 TS3004 (volume 4 l) Design features Technical data TS3007 (volume 7 l) The TS 3000 supply system, including all its components and pipe cou- Permissible operating pressure = 8 bar Thermosiphon vessels plings, can be fully sterilized. Permissible operating temperature for sterile processes Surfaces are electropolished on all = 140 °C 1 TS vessel with cooling coil sides. All metal parts: 1.4571 2 Shut-off valve Design and production according to Elastomers: EPDM 3 Level switch EU Pressure Equipment Directive 4 Pressure gauge (972/23 EG) Connections (membrane transducer) Vessel can be split. The joint is sealed Pressure gauge DN25 (screw connec- 5 Thermometer at the inner diameter by an O-ring tion); float switch DN50 (DIN 11851); all 6 Check valve without any gaps. other connections DN 15 with welding 7 Safety valve (set pressure 8 bar) end. (Dairy pipe work connections). Burgmann Mechanical Seals Design Manual 15.3 99 Thermosiphon system to API 682 TS6050 The Burgmann thermosiphon Design, calculation, material system TS 6050/M001 meets all selection, material testing and requirements to supply mechani- production in accordance with cal seals in accordance with the ASME VIII, Div. 1 guidelines laid down in API 682. No U-Stamp! The vessel is equipped with all Test pressure = 1.5 · max. per- essential connections for fitting missible operating pressure additional components. It is used Torispherical heads for the storage, pressure mainte- Weldpad type sight-glass for nance and cooling of buffer fluid optimum level monitoring in the sealing circuit. Pressuriza- tion is monitored by a pressure switch. The incorporated level Operating and installation diagram of switch issues a signal whenever the TS 6050 system (mounting and the level of buffer fluid is too operating instructions to be strictly low. observed). 1 ... 2 m Mechanical seal Technical data Pressure: Vessel 50 bar Cooling coil 16 bar Temperature: 200 °C Volume: Vessel 28 litres Cooling coil 1.4 litres Cooling capacity: Without cooling water 1 kW Natural circulation 2.5 kW Forced circulation 6.5 kW Net weight: 75 kg Metal parts: AISI 316L / 1.4404 Sight-glass: Borosilicate Seals: PTFE Welding filler: 1.4576/1.4430 Item Description 1 Level switch 2 Manometer 3 Manifold 4 Pressure switch 5 Shuttoff valve 6 Orifice TS 6050/ M052-D0 Cover Thermosiphon vessel N9 Connection to flare (API Plan 52) (for API Plan 52) Connection for nitrogen N1 to the mechanical seal (for API Plan 53) N2 from the mechanical seal 3 N3 Level switch MIN /4’’ NPT 3 N4 Level switch MAX /4’’ NPT N5 Filling connection TS 6050 / M053-D0 Bottom Thermosiphon vessel N6 Drain (API Plan 53A) N7 Cooling water IN, pipe 15 x 1.5 Design as for Plan 52 but connection N8 Cooling water OUT, pipe 15 x 1.5 N4 closed by threaded plug. 100 Burgmann Mechanical Seals Design Manual 15.3 Pressure booster system DRU2000 With the Burgmann DRU system cooling buffer fluid. Pressuri- it is possible to supply buffer zation by means of a piston from fluid to double and tandem seals the process/medium pressure. for a broad range of applications. Pressure increase in accordance SPK The function of the DRU-system with the transmission ratio. The SPI is similar to the TS-system. The maximum operating pressure of SPN difference is the pressure boo- 63 bar applies to the buffer pres- ster is creating the buffer pres- sure. Therefore the process/ sure without a nitrogen supply. medium pressure at the connec- Pres-sure boosters are equipped tion must be lower and is condi- as standard with all the neces- tional on the transmission ratio: sary connections and brackets. DRU2063/A001 up to 57 bar System components (see pages DRU2063/A002 up to 42 bar 1... 2 m 102/103) can thus be installed to Product pressure suit new requirements or seal Operating and installation diagram of SPU retrofits at a later date. the DRU system (mounting and operating Pressure boosters for storing and instructions to be strictly observed). Mechanical seal TS6050 / DRU2000 Technical data Permissible operating pressure: 63 bar1) Permissible operating temperature: –60 ... +200 °C DRU2063/A001 Features Volume: Vessel 4 litres All pressure-loaded welds are butt- Colling coil 0.7 litres Pressure booster welded or counter butt-welded by the Cooling capacity: Transmission ratio: 1:1.1 MAG and TIG process. Natural circulation 1.5 kW2) Working volume: 2 litres Sockets with recessed gasket (no con- Forced circulation 4 kW2) tamination of the circuit by thread Required cooling water rate: 0.4 m3/h DRU 2063/A002 sealant). Approx. net weight: 51 kg Transmission ratio: 1:1.5 Housing is easy to dismantle. All parts Metal parts in contact with buffer fluid: Working volume: 1.5 litres are readily accessible for cleaning. 1.4571 Seals: PTFE A Buffer medium IN (G1/ ) Design and production according to 2 Protective pipe for piston rod: connection possible for SPI 2063 EU Pressure Equipment Directive (97/23 EG). Borosilicate glass B Buffer medium OUT (G1/2) 1 C Process medium (G /2) 1) Design data – permissible working values D Coolant IN (tube 15 x 1.5) depend on the actual conditions of service E Coolant OUT (tube 15 x 1.5) 2) Guide lines with buffer fluid water/60 °C – cooling water/20 °C F Connection for SPN (G1/8) Burgmann Mechanical Seals Design Manual 15.3 101 Supply system Components TS1016 TS1016 TS2000 TS1016 TS2000 DRU DRU SPN 2063 TS1016 SPN1000/3000 SPU SPN 2063-00 SP 23-... SP23-... Circulating pump Hand refill pump Measuring instrument Measuring instrument (pressure gauge) (flow meter) for circulating the buffer fluid (to increa- for manual refilling during operation in se the cooling capacity). Suitable for case of buffer fluid losses. for visual monitoring of the operating for checking the amount of fluid used to water and other liquids of similarly low The refill pump consists of a storage ves- pressure. refill the buffer fluid circuit in closed viscosity. sel with level indicator, filler neck and a systems (SPN 1000/3000). The indica- hand pump. It is mounted directly on the Materials: ted volume equals the amount lost from SPU 1010/A001 thermosiphon vessel or pressure booster. Parts in contact with the buffer fluid are the circuit through leakage. Max. permissible viscosity: 10 mm2/s made of 1.4571. Permissible operating pressure: 10 bar SPN 4016 SP23-26 Permissible operating temperature: 65 °C As SPN 2063, but especially for applica- SP23-41 Type of protection: IP 42 tion with TS 1016. SP 23-092 SP23-42 SP 23-094 SP23-46 Voltage connection: 380 V/50 Hz SP23-095 Measurement range Power consumption: 75 W Storage vessel SP 23-097 0.1 ... 1 l/h*) Type 0.4 ... 4 l/h*) Weight: 2.1 kg Capacity: 2 l Pressure range Type of contact 0–6 bar Proximity cont. acc. to NAMUR Permissible operating pressure: 0 bar Materials: Parts in contact with the buf- 0–16 bar Hazardous duty approval Permissible operating temperature: 60°C Size ATEX Exia fer fluid are made of 1.4301. NG63 Control valve NG100 (needle valve) Shut-off valve for pressure gauge Max. operating pressure SPU 5000 without 40 bar Seal-less circulation pump for inline with 100 bar assembly Proximity contact acc. to NAMUR *) With water as buffer fluid, other media on 2 Max. permissible viscosity: 10 mm /s Pressure min. *) request Materials: Hazardous duty approval Max. operating pressure: 40 bar SPN 2030 ATEX Exia Max. operating temperature: 80 °C SPN 2063 Explosion protection: EExd IICT4 SPN 2063 / A015 SPN 2063 / A100 Voltage connection: 230/400 V / 50 Hz SPN 2063 / A200 SP23-093 Power consumption: 180 W SPN 4016 Type Measuring instrument Weight: 5,0 kg Sight-glass (thermometer) seal materials Acrylic, Perbunan for visual monitoring of the operating Materials: Borosilicate glass, T2 Metallic parts in contact Inlet filter materials temperature. with the buffer fluid made of 1.4571. Polyamide Stainless steel Material of vessel Stainless steel Materials: C Polyethylene Parts in contact with the buffer fluid are Pressure control valve 30 bar made of 1.4571. 63 bar Size: NG 63 None 16 bar Measuring range: 0 – 120 °C Performance curves SPU Please enquire about circulating units for a higher capacity or for different media and/or viscosities. 102 Burgmann Mechanical Seals Design Manual 15.3 TS2000 TS1016 DRU TS2000 TS2000 DRU SPI SPL SPS SPK Measuring unit Level indicator Level switch Contact unit for visual monitoring of the operating for visual monitoring under difficult servi- for buffer fluid level monitoring with for buffer fluid level monitoring through temperature and the operating pressure. ce conditions. alarm and/or control of automatic refill magnetic or proximity contact. The measuring unit consists of a pressu- It functions by means of a floating ball units. The contact unit consists of one or sever- re gauge (NG 100) with a gauge shut- off and a magnetic system. The indicator al magnetic elements which transmit the valve in accordance with DIN 16270, a strip can be positioned through 360h. It Materials: Parts in contact with the buf- position of the fluid level or of the pres- bi-metallic thermometer gauge with pro- consists of movable two-colour plates fer fluid are made of 1.4571. sure booster piston rod to the switches tective sleeve, and a connector. that are turned by the magnet system. without touching. The switches are reed Weight: approx. 1.7 kg. contacts or inductive contacts in accor- Materials: Parts in contact with the buf- SPL 2000 dance with NAMUR. fer fluid are made of 1.4571. Max. operating pressure: 63 bar Max. operating temperature: 200 °C SPS2000 / A201 3 SPS2000 / A202 Components Weight: approx. 2.9 kg Minimum density of fluid: 0.7 g/cm SPS2000-00 SPS2000 / A002 SPK2000 / A004 SPS2000 / A101 SPK2000 / A005 Materials: Parts in contact with the buf- SPS2000 / A102 SPK2000 / A006 SPI2000 fer fluid are made of 1.4571 or titanium SPS2100 / A101 SPK2000 / A012 SPI2000 / A003 SPS2100 / A002 SPK2000 / A101 SPI2000 / A012 (float). Type SPK2000 / A102 SPI2000 / A013 Float switch SPK2000 / A103 SPI2000 / A049 with reed contact Type SPI2063 Weight: approx. 5 kg. Float switch Reed contact SPI2100 / A002 with 2 reed contacts Proximity contact Type Contact function acc. to NAMUR Pressure meas. range N.B.: Please quote the density of the buf- Min. leve Contact position 0–40 bar fer fluid when placing your order. Max. level Min. level 0–100 bar Contact function Normal level Temperature meas. range Switch contac Max. level 0–20 Available on request with the SPK 2000 Contact breaker Contact function 0–200 (closed cont. principle) Contact breaker Proximity switch contact unit. Hazardous duty Flipflop according to NAMUR approval (reversible function) min. pressure Not Hazardous duty approval max. pressure ATEX Exd None min. temperature SPL 2000/A020 ATEX Exia ATEX Exib max. temperature SPL 2000/A021 Permissible Contact load Hazardous duty approval SPL 2000/A022 contact load Max. 1A / 20W / 150V ATEX Exia Type Max. 250 V / 40 VA Max. 0.5A /12VA / 70V Proximity contact acc. to NAMUR Max. 250 V / 12 VA Contact position max. 230 V / 40 VA Please enquire about other measurement Min. level Permissible ranges and gauges and about thermome- Max. level operating pressure Hazardous duty approval 30 bar ters with contacts. ATEX Exib 40 bar 100 bar ** – Approved within Germany Permissible *** – Not in the hazardous duty area operating temp. 120 °C With inductive loads, contact protective 150 °C measures are necessary. 180 °C 200 °C Min. density of buffer fluid 0.7 g/cm3 0.4 g/cm3 Burgmann Mechanical Seals Design Manual 15.3 103 Supply systems SPN Mechani- cal Seal SPN100 with pneumatic drive. SPN3000 with electric pump drive. Operating and installation diagram for the General features SPN (mounting and operating instructions to be strictly observed). All connecting threads G1/2 in accordan- ce with DIN ISO 228. Tank with level switch and sight-glass (automatic refill unit available; please enquire). Materials (standard) Parts in contact with the medium are made of stainless steel. Secondary seals and elastomers are resistant to water, demineralized water and hydraulic oil. SPN 1000 Designation Buffer fluid Max. Vessel Number Type Nominal Max. Approx. overall Net pressure flow rate capacity of of output air dimensions weight Automatic refill unit adjustable (l/h) (litres) pumps drive (kW) rate in cm approx. from ... to (Nm3/h) H x W x B (kg) Buffer fluid pressure regulation via pres- (bar) sure switch to the pump control. SPN1020/EO02 0,5–200 10 20 1 E 0.18 – 69 x 37 x 36 40 SPN1020/LO02 5–20 60 20 1 L – 26 58 x 37 x 36 30 SPN 3000 SPN1063/EO02 05–630 10 20 1 E 0.18 – 69 x 37 x 36 40 SPN1063/LO02 20–630 60 20 1 L – 26 58 x 37 x 36 30 Automatic refill unit SPN1063/E004 05–630 10 40 1 E 0.18 – 69 x 69 x 36 50 with pressure control valve for manual SPN1063/LO04 20–630 60 40 1 L – 26 58 x 69 x 36 40 regulation of buffer fluid pressure. This SPN1063/EE04 05–630 20 40 2 E 2 x 0.18 – 69 x 69 x 36 60 maintains constant buffer pressure SPN1063/LL04 20–630 120 40 2 L – 52 58 x 69 x 36 50 irrespective of hysteresis-induced pres- SPN1063/EL04 020–6300 70 40 2 EL 0.18 26 69 x 69 x 36 60 sure fluctuations. SPN3035/EO04 4–35 10 40 1 E 0.18 – 69 x 69 x 36 70 SPN3035/LO04 4–35 60 40 1 L – 30 58 x 69 x 36 60 Should the pump be switched off, the SPN3035/EL06 4–35 70 60 2 EL 0.18 30 69 x 100 x 37 80 buffer fluid pressure will be maintained SPN3035/EE06 4–35 20 60 2 EE 2 x 0.18 – 69 x 100 x 37 80 for a limited time by an accumulator. SPN3035/LL06 4–35 120 60 2 LL – 60 58 x 100 x 37 70 Several outputs available for setting dif- SPN3063/EO20 0–63 130 200 1 E 1.1 – 110 x 175 x 100 420 ferent buffer fluid pressures (please SPN3063/LO20 0–63 300 200 1 L – 175 100 x 130 x 070 300 enquire). SPN3063/EL20 0–63 430 200 2 EL 1.1 175 110 x 175 x 100 450 SPN3063/EE20 0–63 260 200 2 EE 2 x 1.1 – 110 x 175 x 100 500 Automatic refill units of the SPN range SPN3063/LL20 0–63 600 200 2 LL – 350 100 x 130 x 170 400 differ from an SPA in that they perform SPN3120/EO20 00–120 130 200 1 E 2.5 – 110 x 175 x 100 450 just two of the four functions of a buffer SPN3120/LO20 00–120 300 200 1 L – 175 100 x 130 x 170 300 fluid system, namely buffer fluid pressu- SPN3120/EL20 00–120 430 200 2 EL 2.5 175 110 x 175 x 100 480 rization and leakage compensation. It is SPN3120/EE20 00–120 260 200 2 E 2 x 2.5 – 110 x 175 x 100 500 possible to use pneumatic or electric SPN3120/LL20 00–120 600 200 2 L – 350 100 x 130 x0 70 400 power or a combination of both for the pressurization (piston pump). Separate components are installed in the SPO 9000 seal buffer circuit to cool and to circulate Closed circuit with pressure accumulator the buffer medium. and cooler. Please inquire. 100104 Burgmann Mechanical Seals Design Manual 15.3 Supply systems Components From To mecanical mecanical seal seal Cooling water HPS 4100 1 Three-phase AC motor Cooling water Technical data 2 Pumping sleeve, stationary IN OUT Screw pump for a max. permissible 3 Pumping screw, rotating operating pressure of 100 bar Cooling water side 4 Magnet pump rotor Design pressure: 16 bar1) HPS 4200 5 Solenoid actuator Design temperature: 95 °C1) 2) Screw pump for a max. permissible 6 Sliding bearing Inlet temperature: 25 °C operating pressure of 200 bar 7 Housing cover plate Volume: 1,13 Liter 8 Housing flange 3 2) Screw pumps of the HPS range are Rate: 1,8 m /h Components 9 Shaft canned pumps. They are hermetically Buffer medium side tight and require by and large no main- Design pressure: 120 bar1) tenance. Their ideal area of application 40 WDK5120/A003 Design temperature: 160 °C1) is closed high-pressure circuits within 35 Heat exchanger Inlet temperature: 70 °C2) hydraulic process engineering systems. 30 with wound double helix around a guide Capacity: 0.34 litres Here the HPS represents a genuine, 25 tube. Rate: 10 l/min2 3000 min-1 low-price alternative to the centrifugal 20 Buffer medium in the tubes, cooling Cooling capacity: 10.5 kW 2 2) pump without stuffing box. 15 medium around the tubes. Design, ma- Cooling area: 0.3 m Head H (m) 10 terial selection andd testing in accordan- Weight (empty): 10.3 kg Additional features 1500 min-1 Small overall size 5 ce with the German Pressure Vessel Weight (full): 11.8 kg Axial and radial bearings (with the Regulations and the AD Code. 1) These values are based on the calculation of pump in operation they are extensively 1000 2000 3000 4000 5000 1) strength Flow (l/h) Operating instructions 2) These values are based on the calculation of relieved by hydrodynamic centering of the 1) heat Mount vertically with connections pumping screw and pumping sleeve) Pumping characteristic with water as Pumping direction dependent on di- medium pointing up. Provide for external venting Materials rection of rotation on the buffer medium side (the user Parts in contact with buffer medium: pumping in both directions has to install a vent at the highest point Stainless steel 1.4571 Not self-priming (pump circuit of the pipe work). Housing: Carbon steel ST 37.0, primed on must be vented) Cleaning the outside Cooling water side: The area around the O-ring: Viton® tubes can be cleaned mechanically af- Screws: A 4-70 stainless steel ter the housing is removed. Buffer medium side: Flush with a suit- able sovent. Burgmann Mechanical Seals Design Manual 15.3 105 Supply system Components IN from mechanical seal Offset by 90° Holding device and support as accessories WED 2130/A100 Connections Materials WED 3110/A100 N2 Cooling water OUT Parts in contact with the medium: 1.4571 N1 Cooling water IN Secondary seals: Heat exchangers N4 Buffer medium OUT – O-rings: Viton® N3 Buffer medium IN – Gaskets: PTFE Finned Heat exchangers of the WED range are tube used to cool buffer fluids in seal supply N7/N8 Buffer circuit vent Screws: A4-70 stainless steel circuits. Designed as a tubular heat N5 Cooling circuit vent exchanger, the WED is outstanding for N6 Cooling water drain its high cooling capacity yet compact dimensions. Design, production and ma- Technical data WED 2130/A100 mWED 3110/A100 terial selection conform with the Ger- Tube Shell Tube Shell man Pressure Vessel Regulations and OUT with the AD Code. Quality assured. Design pressure (bar)1) 16 130 16 110 to mechanical seal Inlet temperature (°C)2) 30 65 30 65 Features Flow rate (m3/h)2)*) 1 ca. 0.5 6 ca. 3 The buffer medium is directed Capacity (l) 0.23 1.4 0.75 1.8 WEL 1000 through the jacket and the cooling wat- Cooling capacity (kW)*) 636Heat exchanger (air cooler) er through the tubes. Cooling surface (m2)0.20.6These heat exchanges are made of fin- The heat exchanger can be installed Net weight (kg) 14 24 ned tubes without gaps for cooling buf- either in horizontal or vertical posi- Design temperature (°C)1) 150 fer fluids in seal circuits. The cooling tion. medium is ambient air. It is important, It is possible to clean the cooling *) Related to water on both sides therefore, for WEL heat exchangers to water area (mechanically after remo- 1) These values are based on the calculation of strength be installed in well ventilated places in- 2) These values are based on the calculation of heat ving the cover) and the buffer medium doors or, ideally, outdoors. Vertical instal- area (by flushing with a suitable sol- lation is essential. Design, material vent). selection and testing in accordance with the German Pressure Vessel Reg- ulations and the AD Code. Technical data Max. operating pressure: 100 bar*) Max. Operating pressure: 95 bar*) Connecting thread: G1/2 *) higher values on request WED .../A100 106 Burgmann Mechanical Seals Design Manual 15.3 ZY 61 ZY 62 ZY 203 1 Casing 1 Casing 1 Casing 2 Cover 2 Cover 2 Cover 3 Insert 3 O-ring 3 O-ring 4 O-ring ZY 61 Installation diagram for cyclone separa- tors. Cyclone separator with The cyclone separator must always be in- replaceable insert made of stalled in the vertical position. The pres- elastomer or ceramic sure at outlets (C) and (B) must be lower than at inlet (A). Cleaned liquid is con- veyed to the top (B) and the separated ZY 62 dirt to the suction port of the pump (C). Cyclone separator with cast casing and cover Technical data Max. operating pressure: 100 bar*) ZY 203 Max. operating temperature: 95 °C*) Cyclone separator for high flow Parts in contact with medium: 1.4571 rates and high pressures Technical data Connecting thread: G1/2 ZY61 ZY62 ZY203 Cyclone separators of the ZY range are Components Operating pressure max.. (bar) 64 64 200 Capacities: used to clean mainly aqueous liquids WEL 1000/A001: 0.7 litres containing dirt and solids (e.g. in circu- Operating temperature max.. (°C) 125 (60*) 125 150 WEL 1000/A002: 1.4 litres lations of sewage, sludge, crude etc.). Connections G/NPT1/2 G/NPT1/2 G/NPT3/4,1 WEL 1000/A003: 2.1 litres The best possible filtration efficiency is Weight approx. (kg) 3,5 2,0 8,0 achieved when the specific weight of WEL 1000/A004: 2.8 litres Materials: casing/cover 1.4571 1.4408 1.4571 the solids is much higher than that of WEL 1000/A006: 4.2 litres ® ® ® the carrier liquid, and when the differ- Materials: O-ring Viton Viton Viton *) higher values on request ential pressure is as large as possible *) with elastomer insert within the pressure range. The viscosity of the medium is also a factor that needs to be taken into account. 70 60 ZY 203 50 ZY 51/ZY 62 QB QC 40 30 20 QA Cooling capacity: Values based on air Flow rate Q [ l/min] 10 moved at min. 0.7 m/sec. 246 8 Particle size Filtration efficiency, flow rates Filtration efficiency [%] and grain sizes for water as medium Burgmann Mechanical Seals Design Manual 15.3 107 Supply system Components Overall height when dismantled ~ 350 MAA2120 Magnetic separator Magnetic candle in a pressure casing for installation in a pipe line. Technical data depth 20 The magnetic candle can be removed for Permissible operating pressure: 120 bar cleaning by opening the cover (with the Test pressure: 180 bar line depressurized!). Maintenance inter- Permissible operating temperature: vals depend on the degree of soiling. We 160 °C recommend checking and if necessary Capacity: 0.08 litres cleaning the magnet candle several Features hours after using for the first time and Pipe connections G1/2 or NPT internal All pressure-loaded parts are forged each time after flushing the pipes becau- thread. components se experience indicates that much of the Venting screws (Item 13) in the filter dirt is flushed out of the pipe lines at this inlet and outlet can be used as connec- time. tions for maintenance or differential pressure indicator. 1+2 Casing and cover: 1.4571 MAF 2000 Pipe connections can be either G1/2 3 O-ring: E to G1 (DIN ISO 228) or with NPT inter- Magnetic filter 4+8 Screws: A4 – 70 stainless steel nal thread. 5 Washers: T2 Two types of contamination indicator MAF2001 6 Ring magnets: are available as accessories: visual corrosion-resistant Magnetic filter with internal mesh mo-nitoring and/or in combination with a 7 Spring: 1.4301 to protect the filter element for reverse switch. currents (Item 3a) 9 Fixing hole Magnetic filters of the MAF range are Technical data throughflow filters for installation inside Permissible operating pressure: 63 bar pipe lines. The combination of magnetic Permissible operating temperature: rod and filter element guarantees a 150°C (higher temperatures on request). high level of efficiency. Magnetic filters Filter mesh: 50 µm are used in seal supply systems and Weight: approx. 7.8 kg any other such systems in which a li- Cover and filter barrel: 1.4571 quid has to be cleaned of magnetic and Filter insert and element: 1.4301, 1.4401 non-magnetic impurities up to a certain O-rings: Viton® size. Gaskets: PTFE 1 Filter cover 2 Filter barrel 3 Element insert 3a Internal mesh 6 Ring magnet 13 Venting screwn 108 Burgmann Mechanical Seals Design Manual 15.3 Buffer fluid system, open circuit SPA Buffer fluid units of the SPA tion and cooling of the buffer range perform all four functions medium, pressurization of buffer of a buffer system essential for fluid and compensation for leak- Mechanical seal operating double seals – circula- age – in a standard package. Burgmann SPAs have a high Pressure and Safety temperaure standard of quality, are easy to valve measuring unit operate and service, and are adaptable and rugged. Their function is based on the open cir- DHE DRE cuit (see also page 92). Circulating pump Filter Operating and installation diagram for the SPA (mounting and operating in- structions are to be strictly observed). Tank Heat exchanger Featuresmmmmmn Level switch with contact for Min. Designed for hy- level draulic oil with visco- Measuring instrument connections sity values from 12 to suitable for fitting contact switching de- 90 mm/s at operating vices (NG 160) temperature (tank tempe- Provision of an additional pressure rature). The optimum vis- connection for monitoring the pump dis- cosity of the class of the oil charge pressure (outside of the circuit) to be used has to be deter- mined in accordance with the Materials respective application. Storage tanks, measuring instruments, Max. operating temperature cooler and piping are made of stainless in the tank 80 °C (return line special steel. 90 °C max.) Fittings, distributor units, shut-off valves SPA Temperature monitoring with a and tank lid are made of galvanized return line and tank thermometer steel. Buffer fluid directed through oil cooler Reversible double filter (SPA 1000 = single filter) PA1000 SPA2000/3000 Manual control of buffer fluid pressure Standard buffer pressure unit Standard buffer fluid unit Automatic relief valve for reducing Tank capacity 40 l Tank capacity 100 l buffer fluid pressure at standstill Flow rate 6 l/min. Flow rate 12 (23) l/min Version, Nominal Flow Cooling Pressure mmmmmmTank Dimensions overall Net Motor data Designation pressure rate capacity (kW) accumu- n(mm) weight max. (l/min) with lator Nominal Circulation approx. Nominal Voltage, Speed Enclo- buffer press. hydraulic oil DHE capacity volume Height Width Depth (kg) power Frequency (min–1)sure (bar) ⌬t = 10K (litres) (litres) (kW) SPA 1015/A01 15 6 1.8 – 40 12 650 610 380 125 1 SPA 1015/A02 15 6 1.8 40 12 650 610 380 125 1 SPA 1040/A01 40 6 1.8 – 40 12 650 610 380 125 1 SPA 1040/A02 40 6 1.8 40 12 650 610 380 125 1 SPA 1090/A01 90 6 1.8 – 40 12 650 610 380 125 2 SPA 1090/A02 90 6 1.8 40 12 650 610 380 125 2 SPA 2020/A01 20 12 3.6 – 100 20 750 800 555 140 1 SPA 2020/A02 20 12 3.6 100 20 750 800 555 140 1 SPA 2050/A01 50 12 3.6 – 100 20 750 800 555 140 2 400 V 1500 EEPe SPA 2050/A02 50 12 3.6 100 20 750 800 555 140 2 50 Hz II T3 SPA 2120/A01 120 12 3.6 – 100 20 750 800 555 140 3.6 IP54 SPA 2120/A02 120 12 3.6 100 20 750 800 555 140 3.6 SPA 3020/A01 20 23 6.9 – 100 20 750 800 555 140 2 SPA 3020/A02 20 23 6.9 100 20 750 800 555 140 2 SPA 3050/A01 50 23 6.9 – 100 20 750 800 555 140 3.6 SPA 3050/A02 50 23 6.9 100 20 750 800 555 140 3.6 SPA 3120/A01 120 23 6.9 – 100 20 750 800 555 140 6.8 SPA 3120/A02 120 23 6.9 100 20 750 800 555 140 6.8 Burgmann Mechanical Seals Design Manual 15.3 109 SPA buffer system Components Mechanical seal DHE VTE VTE .. / S ... Pressure accumulator unit Distributor unit A distributor unit for supplying two and more mechanical seals in different This is used to maintain the buffer fluid DRE A component for when two or more pumps. It contains an overflow valve pressure for a limited period after the mechanical seals are to be supplied and one flow control valve per seal. SPA circulating pump has failed or Pressure control unit from a single buffer fluid unit. The VTE DRE pressure control units are nec- been switched off. It prevents a loss of A component for setting different levels is suitable for hydraulic oil as buffer essary if different buffer pressures are pressure on the mechanical seal and of buffer fluid pressure when supplying medium. It is delivered as a separate used on the mechanical seals. stops it from opening. The seal, how- several individual mechanical seals via unit which the customer must install in ever, is no longer cooled and must an SPA with a VTE. Suitable for hydrau- the pipe work at a suitable position. therefore be brought to an immediate lic oil. Max. flow rate 23 l/min. There is stop. How long the pressure is maintai- a choice of 4 basic types with max. VTE 02/M ... ned will depend on the following two setting pressure and measuring range A distributor unit for supplying two DRE DRE DRE actors: The rate of leakage of the of 0 ... 25, 0 ... 60, 0 ... 100 and 0 ... mechanical seals in between bearing mechanical seal and the amount of buf- 160 bar. pumps. fer fluid stored in the accumulator. The DHE accumulator comes with a Mech. Mech. Mech. seal seal pressure gauge with shut-off valve, and seal a check valve. The DHE can also be retrofitted to an VTE .. / S ... SPA which is not equipped with this Mechanical Pump Mechanical device. (Conversion kit drawing No. Seal 1 Seal 2 DHE140/R001-00). SPA VTE 02/M... A diagrammatic example for three mechani- cal seals SPA Diagram of the VTE 02/M ... 110 Burgmann Mechanical Seals Design Manual 15.3 ApplicationApplied Technology 111 Case Examples and Recommendations for Industrial Applications Offshore ...... 112/113 Onshore ...... 114 Compressors ...... 115 Mining ...... 116 Coal gasinfication ...... 117 Chemicals ...... 118/119 Refinery ...... 120/121/123 Water ...... 123 Hot water ...... 124/125 Power stations ...... 126/127 Paper industry ...... 128/129 Waste water ...... 130/131 Shipping ...... 132 Sugar industry ...... 133 Sterile systems ...... 134 Burgmann Mechanical Seals Design Manual 15.3 111 112 Burgmann Mechanical SealsDesign Manual15.3 ce oilagainataprofitablelevel. insufficient inherentpressurecanprodu- andevenwellscloseddueto increased, a lowinherentpressure.Extractionis technology ismainlyusedforwellswith This with agascontentofupto98%. pumps maybeusedtopumpmixtures Multiphase without previousseparation. and thenconveyitoverlongdistances compressit "multiphase" fromthewell, mixturecalled to pumptheoil-gas-water With multiphasetechnologyitispossible Multiphase technology single sealifthepointofintersectionliestoleft. re andtemperaturecurvesintersecttotherightofslidingvelocity;usea Explanation: to15 K. raised byaround10 according toPlan52or53.Inthiscasethetemperatureofmediumcanbe cooled, according to API 610 accordingtoAPI cooled, Plan21, 22,23,32,41, 53or54. 2 3 1or62. 12, 13, 31 Assumed modesofoperation: contact yourBurgmannrepresentativebeforemakingfinaldecision. The You diagramismeantsolelyasaroughaidtoselection. shouldalways Seal selectionfor dirtywaterandsea Pressure at the seal [bar] Single seal A doublesealoracooledsinglemustbeusedifthepressu- b Double seals according to API 610Double sealsaccordingtoAPI Plan54. b Temperature attheseal[°C] Single seals according to API 610,Single sealsaccordingtoAPI Plan01, 11, phase pump type MPC 208-67phase pumptypeMPC hasbeenworkingforover6,000hoursunderthemost On aproductionplatformoftheAmocoTrinidad OilCompany, multi- aBornemann b n =1,200 min 78 %, Medium: multiphasemixture,gasshare Seal:BurgmannSHV3/80. adverse conditions. v Seal: Burgmann SH 6/90,6/90.p Seal: BurgmannSH withscrewpump(Leistritz). Canada) (Chevron, Onshore multiphaseapplication b g Tandem seals = 3,600min Single seals, Double seal, single seal, cooled –1 –1 ; p ; t = 25 °C; gasshare87; t=25°C; %. 1 = 70 bar;t=70 °C Titanium. T 500, Hastelloy specialty materialssuch asCarpenter20,MonelK 329),butalso 1.4462 AISI toDuplex, (similar resistant to seawatersuch asthestandard Useismadeofmaterials ted bysoliddeposits. These sealsare designed not toclogeven ifaffec- well asfor itsemergency runningcharacteristics. marks for resistance tochemicals anderosion as running againstsiliconcarbide.Italsoscores high conditions hasproven carbons high-strength tobe of over Theidealcombinationfor 60m/s. such sures inexcess of100 barandslidingvelo-cities characteristics. Oftenitisnecessarytosealpres- able slidingfaces withgoodemergency running mechanicalhard-wearing sealsthatfeature dure- systems require pumpswithreliable, heavy-duty gases found mineral incrudeoil, oilpumping o be able to cope with the sand, waterand abletocopewiththesand, o be 1 = 18 bar; ® C and B, Inconel C andB, ® 625 and Offshore Main oil export pump Oseberg A oil platform A high-speed pump (Frank Mohn A/S) is being used on the Main pump (Kværner Eureka Draugen platform A/S) for transporting crude oil (operator: Norske from the Oseberg B platform Shell) sealed with (Norsk Hydro) through an under- Burgmann SH water pipeline to the oil terminal 3/62. in Sture. The pump is fitted with Q = 750 m3/h; a Burgmann HFV-D4/120 double discharge pres- seal with matching buffer fluid sure 235 bar (g); system. NPHSR 13.7 m; Oseberg Production System Pump performance data: n = 12,000 min-1. Q = 797 m3/h; H = 992 m; n = ... 3,400 min–1; Operating pressure = 60 bar Troll Waterinjection pump The BP Gyda production platform in the North Sea is equipped Gas Injection Oil Terminal with multistage water injection pumps (Weir Pumps) with intake Oseberg Field pressures up to max. 335 bar; successful sealing them with over 10,000 hours of problem-free operation behind it already is the Oil Pipeline Burgmann HST 1/119-TA2, a hydrostatic primary seal that runs contact-free in operation and sinks the pressure level from 235 bar to approximately 20 bar. The downstream mechanical seal employs a hard/hard material combination. Offshore Bergen Burgmann Mechanical Seals Design Manual 15.3 113 O n s h o r e Water injection pumps Pipeline pumps A pump station for water injection in the Buhasa oil field (UAE, shown also in the main photo at the top). It is fitted with Burgmann HF-D4/93 seals and SPN085/E002 refil unit. SH1-D/120 double seals in injection pumps (IDP, CA-8) used in gas-oil separation applications for Saudi Pipeline-Pumpe (Ruhrpumpen SMI300) sealed with Burgmann SH7/80. Aramco, Saudi Arabia. The pumped medium consists of so- Crude oil pump called brine water with up to 30 % salt content and additional solids and Burgmann SH1/147 for crude oil pumps gases (e.g. up to 500 mg/l of H2S). All (Byron Jackson, DVMF) used in Saudi parts in contact with the product are Aramco oil fields. The crude oil contains made of Inconel 625 on account of the SH7/80 mechanical seal for crude oil paraffin wax, volatile constituents and high risk of corrosion. Face materials: pumps used on the Quinghai Petroleum occasionally large quantities of abrasive SiC-Si on the product side, SiC-C- Project (China). The seal has a single solids (when a new well is started). The Si/SiC-Si on the atmosphere side. rotating spring which is insensitive to solution: SiC/SiC combination of face (p1 = 11.5 bar; p3 = 17 bar; t1 = 60 solids. Mode of operation in accordance materials with HS grooves, flushing of the °C; n = 3,580 min–1) with API 610/682, Plan 11. spring compartment, multipoint injection (p1 = 40 bar; t1 = ...80 °C; and a baffle to prevent a gas ring forming n = 2,980 min-1) in the area of the sliding faces (API 682, Plan 11). Further pumps have since been converted to the SH concept following the success of this retrofit project. p1 = 14 bar; t1 = 71 °C; n = 1,790 min–1. 114 Burgmann Mechanical Seals Design Manual 15.3 Compressors are high-speed machines whose trouble-free availability constitutes a major precondition for many process engineering operations. Key criteria for the selection and design of compressors are the working medium, the compres- sion ratio, the volume flow, the Flash turbine number of intermediate inputs The specially designed elastomer-free and outputs, and the design of PDGS achieves optimal operating results at extremely low sealing temperatures on the shaft seal. In all cases a ro- flash turbines: low leakage rates in ope- rating and shutdown modes, improved CO compressor (Atlas Copco) at Alkos, Yochon/Korea, with a tating shaft passes through a efficiency and higher reliability. p1 = 100 barg, static and dynamic; t = –170 ... Burgmann DGS2/49 gas seal. p1 = 2.2 ... 28 bar a; n = 21,700/34,800 min–1; medium: carbon monoxide. casing wall, so the choice of sea- +230 °C; vg = 200 m/s. ling system – which today is usually of gas-lubricated design – assumes central importance. C o m p r e s Compressor (Nuovo Pignone) on the Njord offshore platform Coking oven gas compressor (Norsk Hydro) with a Burgmann DGS9/130 gas seal (tandem (Mannesmann Demag) at Wintershall arrangement) and a CSR to seal the bearing oil. In operation AG, Lingen. Built in 1954 with labyrinth without trouble since 1998. p1 = 26 ... 48 bar a; n = 12,495 seals, the turbine-driven single-shaft ra- min–1; medium: natural gas. dial compressor plant with twin housing has been converted to the Burgmann type DGS seal of a double arrangement with buffer gas supply system. d1 = 88/134.8 mm; p1 = 0.01/2.2 ... 5.6 bar; vg = Ethylene compressor (Demag Delaval) at the Yanshan –1 Petrochemical Plant (China). Sealed with Burgmann 65.7/84.8 m/s; n = 7,300/12,800 min ; medium = coking oven gas with H2S PDGS1/195, elastomer-free. p1 = 3.8 bara; t = -80 °C; vg = 100 m/s; n = 7,830 min–1. content; buffer gas = nitrogen. The two-stage screw compressor (Aerzen VRO825) used to compress coking oven gas in this coking plant is the biggest ever built. It is sealed with a Burgmann type HSH2/215. Ammonia compressor (Sulzer-Turbo) at Norsk Hydro, Trinidad. The compressor system was equipped with a Burg- mann DGS, independent of the direction of rotation, in a tandem arrangement with internal intermediate labyrinth and a Burgmann buffer gas system. The system has been running without trouble since 1995. d1 = 100 mm; p = 4.7 bar a; n = 15,850 min–1; medium: ammonia. Burgmann Mechanical Seals Design Manual 15.3 115 Quarrying and c o a l m i n i n g Roll-type loader (Eickhoff The cutter heads on quarrying EDW-230-2L-2W) in the Prosper- and mining machines are fed Haniel mine with water, not only for cooling Tunelling machine purposes but also for settling (Paurat) with the dust and extinguishing any cutter head sparks produced by the cutting tools. Mechanical seals perform the dual function of rotary joint and seal for the cutter and roller heads. Rotary joint S14/48 with segmental distributor (Item 1) for internal spraying of the car- bide cutters on twin-roller loaders. Me- dium: pit water with solids (25 µm). Roller head seal Flow rate: approx. 150 l/min. type H427GS1/35 with segmental (d = 35 mm; p = 50 ... 250 bar; spray jets, used in the front section of a 1 1 Cutter head seal t = 25 ... 35 °C; n = 25 ... 60 min–1) cutter arm. To restrict the water jet to type HRSV-D201/254 (double) with just the cutters actually working the cooling water supply for the spraying Rotary joint rock, a segmental distributor (Item 2) is system. The spray water is first cleaned S2/45 with segmental spraying. fitted ahead of the mechanical seal by a 100 mm filter. Item 1 = water Designed for the cutter head of a (Item 1). Item 3 = cooling water inlet; feed; Item 2 = distributor bores to the mining machine (Voest Alpine). item 4 = feed bores. cutter head. (d1 = 254 mm; p1 = 150 Medium: filtered pit water with solids (d = 35 mm; p = 50 ... 150 bar; –1 1 1 (250) bar; n = 41 min ). < 50 µm, p = 150 bar; n = 36 min–1). 1 n = 70 min–1. Photo: Rotating seat of the S2/245 with special surface structure. 116 Burgmann Mechanical Seals Design Manual 15.3 Coal gasification There were times, particularly during the oil-crisis years, when coal gasification centred on the pro- cess of hydrogenation, e.g. to produce motor fuels. Nowadays the driving force behind its further de- velopment is the generation of electricity by com- bination-type power stations with integrated coal gasification. Here the main objectives are to lower CO2 emissions, to raise fuel efficiency and to stretch existing resources. Burgmann has conside- rable experience at its disposal for this highly de- manding technology, for Burgmann mechanical seals and buffer fluid systems have been used in all the coal gasification processes implemented in the past few decades. Buffer gas IN Coal gasification Boiler Lurgi plant in Scotland Seat Throttle structured For a pilot plant for coal gasification in Scotland Burgmann supplied the mechanical seals (type HSHLV-D1/210 Gas-lubricated to seal the boiler and type HSH-D3/60 AGS1/220 for the Rheinbraun-HTW coal feed screw. to seal a hollow shaft for taking sam- Photo above: ples; Lurgi process), the necessary the seal being A Burgmann AGS1/220 gas-lubricated hydraulic system (SPA) and further sup- installed. mechanical seal for the coal feed ply units for the seals (SPN, DHE), and screw at the Rheinbraun coal gasifica- installed the complete electric and tion plant in Hürth/Germany. In order to electronic control system. increase efficiency the plant had to be (p1 = 70 bar; p3 = 80 bar; t = 90 °C). operated in the area of the feed screw at 30 bar according to a new concept. The previously used lip seals on PTFE basis were unsuited, so were replaced by the AGS1/220 developed specially for this application; it proved so suc- cessful that further systems of this type were ordered. (p1 = 30 bar; p3 = 0,2 ... 0,5 bar –1 above p1; t = 200 °C; n = 3 ... 50 min ). Burgmann Mechanical Seals Design Manual 15.3 117 Chemic The materials used in the chemi- cal industry need to be capable of coping with the large array of me- dia, many of them explosive or to- xic and others which could become when mixed. An increased aware- ness of environmental risks calls Standard chemical pumps for a maximum reliability and ope- (Photo right: KSB-CPKN; bottom: Allwei- ler CNH-B) which are used in a wide rational safety, especially from sea- range of chemical processes. Depen- ling systems. ding on the requirements or environ- mental restrictions, they are fitted with Burgmann standard seals in accordan- ce with DIN 24960 (e.g. M7N) or DIN24960 Part C (e.g. HRC). Combustion of residues HRC-GS3000N gas-lubricated mechani- Gear pumps (Steimel) for circulating cal seals are used by BASF AG in its printing inks (viscosity: 500 ... 15,000 pump system for loading this rotary kiln mm2/s). Sealed with a Burgmann type with liquid, pasty and solid residues. M7N seal (TTV O-rings) and down- The sophisticated solution has prolon- stream stuffing box packing of the type ged the useful life of the liquid residue Araflon, also from Burgmann. pumps used. As the result, stoppage (p1 = ... 15 bar; t = 0 ... 30 °C; Chemical pump (KSB, CPK) for pum- time have been shortened and less n = approx. 350 min–1). ping crystallizing caustic soda in a maintenance work is required on the chlo-rine absorption plant at Hoechst. pump systems. Sealed with a Burgmann type H74-D in a double arrangement. 118 Burgmann Mechanical Seals Design Manual 15.3 als Multiprocessors (Drais) with fitted blade mills are employed for an assort- ment of processes, from food production Agitator bead mills (Vollrath) with two to the drying of leather dyes. The blade mill cells arranged in series in the lacquer mills are sealed with Burgmann type production department. Sealed with a MRF-D seals and TS2000 supply sy- Burgmann type MFR-D17/65 double seal. stems. (p1 = 0,5 ... 3 bar, t = 60 °C; –1 n = 1,045 min ; p3 = 4.5 bar; buffer medium = 30:70 glycerine water mix.) Great efforts are being made on an inter- ̈ national scale to meet the rising demand for polypropylene. The most popular solu- tions are the polypropylene reactors built under licence from BASF and sea- Chemicals led with Burgmann type HSHU-D1 bot- tom entry drive seals and Burgmann Standard centrifugal pump (Lowara buffer fluid systems. Burgmann sealing Germany) made of AISI 304 chromium systems for these processes are ack- nickel steel, which is used in many dif- nowledged to be the world leaders, not ferent applications in the chemical sector. least in view of such impressive figures Sealed with the Burgmann MG1 as up to 80,000 hours operation elastomer bellows mechanical seal. without reconditioning. Vertical ammonia pump (IDP 14 WUG-8) with the Burgmann CGS-KD/43- U gas-lubricated seal and the GSS 4010 seal supply system at the SKW Prestritz nitrogen works in Wittenberg. The car- tridge seal runs successfully with zero leakage and zero wear. (p1 = 23 bar; t = –33 °C; n = 2,980 min–1). Plastic centrifugal pumps (KT Troisdorf, BP32-160) for pure or contaminated acids and lyes. The Eccentric screw pump (Seepex 10-6 example in the picture is an application LNS) with Burgmann MG1-45/66 in involving 10% caustic potash solution. back-to-back arrangement for conveying Sealed with MFL85N single seal in a Rotary piston pump (Lederle), equip- sulfide slurry. (p1 = 4 bar; t = approx. dead-end arrangement. Metallic materi- ped with a Burgmann type M74-D seal 90 °C; n = 335 min–1). als are in Hastelloy, seal faces are and the TS2000 buffer fluid system for made of SiC. (p1 = ... 6 bar; chemical applications. t = ... 80 °C; n = 2,800 min–1). Burgmann Mechanical Seals Design Manual 15.3 119 Refinery The processing of crude oil in refi- cial challenges in various respects: ture ranges, and the handling of neries is a complex, multi-stage Risk of insufficient lubrication and hazardous substances (harmful, process in which crude oil is trans- dry running due to volatile material polluting and potentially explosive) formed into refined, high-quality constituents and low boiling points, are all conditions which need to be end products or feed materials for media with a diversity of physical controlled with absolute reliability. the petrochemical industry. Sealing properties (from liquefied gas to technology for this area faces spe- bitumen), high and low tempera- Low-temperature applications Return pump with tandem seal type H75S2- H75F1 according to API 682 Plan 52 for the sealing of hydrocarbon. Buffer medium: met- hanol. Temperature: –13 °C. Vertical in-line pump (Worthington) for emp- Burgmann mecha- tying an ethylene liquefied gas depot. Double nical seal type sealing system with Burgmann MFLWT80F- MFLW85S20 for D1/53 (API 610, Plan 53). sealing gas oil with (p1 = 2 bar; intake pressure = 23 bar; p3 = sulfur in a 6 bar; t1 = –103 °C; Ruhrpumpen pump. –1 n = 3,000 min ). Temperature 217 °C, Nitrogen pump in a loading station run by pressure 2.3 bar. Linde AG. The gas-lubricated MFLC-GS seal from Burgmann has been running without trouble since April 1998. p1 = 5 bar; t = –196 °C; n = 2,950 min–1. Further mobile pumps (n = up to 11,000 min–1) in tanker trucks are also being successfully sealed Discharge pumps (KSB, WKR-65-3) in a with the MFLC-GS. transfer station for propylene (C3) run by Hoechst AG, Frankfurt. They are equipped with Burgmann type H7N/H7F3 seals as tan- dem cartridges with TS 2000 thermosiphon system. (p1 = 18 bar; t = -10 ... +40 °C; –1 n = 2,950 min ; d1 = 38 mm.) 120 Burgmann Mechanical Seals Design Manual 15.3 Burgmann MFLWT80S3/90Ta1 seal and 3020/A22 supply system in accordance with API Gas oil pump (Byron Jackson) with Burg- Plan 54 + 2 in pumps (Byron mann type MFL65 and type HSHF1 seals in a Jackson) used to convey resi- tandem arrangement. To keep the carbide dual oil. t = 332 °C, p = 8.5 bar. seal face housing of the MFL65 on the pro- duct side free of stress, it has a balancing Residual oil pump (Thyssen- groove. Buffer fluid is cooled by a Burgmann Ruhrpumpen) with Burgmann heat exchanger. Modes of operation in MFL W80-D1/70 and SPA accordance with API 610, Plan 02 + C, 23, 3020/A22. Mode of operation according to API Plan 54 + 2. 53 and 61. (p1 = 3.5 ... 15 bar; t = 280 °C; n = 5,900 min–1.) Temp. 375 °C, pressure 3 bar. GLP delivery pump (Sulzer Weise, RP37) at the Henrique Lage Petrobas Refinery in Revap, Brazil. Approx. 30,000 tons are conveyed by the pump in a month, saving around 1,650 truck deliveries. Sealed with a SHFV- D1/150 supplied by the SPA66. p1 = 25 bar; t1 = 30 °C; Refinery vg = 28 m/s; media: hydrocarbons. Mobile Burgmann SPN2063 refill units for WICOOM at the MIDER 2000 oil refinery in Leuna. Of the 900 pumps in the complex, around 700 are supplied by this Quench oil pump (Ruhrpumpen, ZM-II-530) mobile, universal at DSM, Holland, converted to the Burgmann refill unit (with gas-lubricated RGS-D1/143 with GSS buffer selector for gas supply system. The plant has been run- Sulfolan pump (KSB, RPK-Cm) in an aroma- choosing between tics station at the Cologne-Godorf refinery of ning without trouble - with one brief inspec- 5 different buffer tion - since it was restarted in January 1999. Deutsche Shell. Sealed with the gas-lubrica- media). ted Cartex-GSD. Operating mode in accor- p1 = 1 bar; t1 = +191 °C ... 215 °C; dance with API 682, Plan 11 with steam n = 1,500 min–1; medium: quenching oil quench on the atmosphere side. with 3 % solid content. p1 = ... 2 bar a; p3 = 3 ... 5 bar; t1 = 165 °C; n = 2,950 min–1; medium: sulfolan, crysta- lizes at +26 °C; buffer gas: N2. Burgmann Mechanical Seals Design Manual 15.3 121 API682 API 682 covers the following ranges: "Sealing systems for centrifugal Shaft sizes: 20 to 110 mm pumps, API 682" is the title of the Temperatures: –40 °C to +400 °C standard issued by the American Pressures: 0 bar absolute to 42 bar abso- Petroleum Institute for pumps in lute the hydrocarbon processing indu- API 682 includes a seal selection pro- stry. The API 682, 2nd edition, to cedure as well as an aid for selecting ISO/NP 21049, contains sealing buffer/quench fluids, seal supply systems and supply systems for applicati- and modes of operation. H75VN MFL85 Single seal t = –40 ... +260 °C t = –40 ... +260 °C Type A/B ons in refineries and the chemical Cartridge solutions are specified for all applications. API 682 requires all parts of p = 0 ... 40 (80) bar p = 0 ... 25 bar Arrangement 1 industry. vg = 25 m/s vg = 20 m/s the seal (including its cover and shaft sleeve) to be supplied by the seal manu- facturer. Double seal Type A For the purposes of qualifying the seals, Arrangement 2 or 3 all standard types and arrangements have to be put through stipulated dyna- H75VK/H75F t = –40 ... +260 °C mic trial runs under defined conditions. p = 0 ... 40 (80) bar vg = 25 m/s Seal types Type A O-ring seal Double seal Rotating O-ring seal with multiple Type B springs Arrangement 2 or 3 Sliding faces: reaction-bonded silicon MFL85/MFL85F carbide against blistering-resistant carb- t = –45 ... +260 °C on p = 0 ... 25 bar vg = 20 m/s Fluoroelastomer O-rings Hastelloy® C-springs Metallic components (cover, shaft sleeve etc.) made of stainless steel (type 316) Single seal Type C Floating carbon throttle in the seal Arrangement 1 cover on the atmosphere side MFL65 t = –40 ... +400 °C Type B Bellows seal p = 0 ... 25 bar Rotating metal bellows seal with O- vg = 50 m/s ring secondary seals Sliding faces: reaction-bonded silicon carbide against blistering-resistant carbon Double seal Fluoroelastomer O-rings Type ES Arrangement 2 or 3 Hastelloy® C bellows Metallic components (cover, shaft MFLWT80/H75F sleeve etc.) made of stainless steel (type t = –40 ... +400 °C Pump (Ruhrpumpen) with Burgmann tandem p = 0 ... 25 (40) bar seal type H75S2-H75F2 according to API 316) vg = 20 m/s 682 Plan 52. Medium: C3 fraction; buffer Floating carbon throttle in the seal medium: methanol. cover on the atmosphere side Arrangement 1: single seal For circulation systems Arrangement 2: double seal, unpressurized according to API 682 refer Type C Bellows seal Arrangement 3: double seal, pressurized to page 93. Stationary metal bellows seal with gra- phite secondary seals Sliding faces: reaction-bonded silicon Burgmann MFL WT80. A typical carbide against blistering-resistant carbon cartridge mechanical seal of the Graphite secondary seals type used as standard in refineries. Inconel® 718 bellows Metallic components (cover, shaft sleeve etc.) made of stainless steel (type 316) Floating carbon throttle in the seal cover on the atmosphere side Return pump (KSB) with Burgmann tandem seal type H75S2/60-H75F2/55 according to Type ES API 682 Plan 52 for sealing C4 hydrocarbon. Special seal design Buffer medium: methanol. 122 Burgmann Mechanical Seals Design Manual 15.3 W a t e r The Al Jubayl desalinization plant for sea water in the Arabian gulf, used to supply Riyadh with drinking water RWTS pipeline project The drinking water Desalinization supply system of Drinking water supply of sea water the Peroxid com- pany in Höllriegels- kreuth. A between- bearing pump (Klaus Union) with Burgmann type M74N/90 seals (hard carbon/cast Cr-steel) on both ends are being used successfully in con- Main Pumps (Wort- tinuous service. hington) in the (d1 = 90 mm; p1 = RWTS project, sea- 10 bar; t = 8 °C; led with Burgmann n = ... 1,600 min–1; HSHV1/220 seals product circulation). (left) Multi-stage pumps (Vogel MP) in water Refinery/Water supply and water treatment systems. Delivery rates ...340 m3/h, delivery heights ...500 m. t = ...140 °C; p1 =16 The Riyadh Water Transmission System bar. Sealed by M7N (RWTS) project consists of a 460 km (on the drive side) twin pipeline with the necessary pumping and the MG912 (on stations. It extends from the Al Jubayl the non-drive side). Burgmann VGM single seal of fully split desalinization plant in the Arabian Gulf to design (top). Mounting the seal on a turbi- Riyadh (A Mannesmann project). ne shaft (below). The main pumps and the booster pumps Swimming pool (Worthington) used in the project are Half-split and fully split sealing units are equipped with Burgmann HSHV single a great advantage when pumps are ope- seals of cartridge design, with type rated without a standby and the sealing ZY203 cyclone separators and type compartment offers too little space in SP23-04 leakage controllers (API 610, axial and/or radial direction to fit or repla- Plan 31). (d1 = ... 250 mm; p1 = ... 50 ce the mechanical seal. Effort and down- bar; vg = ... 25 m/s). times are reduced considerably for ins- pection and repair jobs. Burgmann half- split and fully split mechanical seals type HGH and VGM are working successfully Drinking water pump (KSB, MTC D 100) in numerous pumps in sea water desali- with a Burgmann type H17GN/50 seal. nization plants and hydropower station turbines. Swimming-pool water circulating pump (Herborner Pumpenfabrik), equipped with an MG1 single mechanical seal Burgmann Mechanical Seals Design Manual 15.3 123 Hot water is conveyed by pumps for a variety of purposes in thermal energy generating systems, district heating systems, home heating systems and Hot water so on. The suitability of a mechanical seal for such applications depends on many different parameters, e.g.: pressure to be sealed temperature at the seal sliding velocity power consumption water quality (pH-value, O2-dose, conductivity, operating mode) water additives such as corrosion inhibitors Mode of operation1) vg p · vg 3) Werkstoffe In the diagram and in the table you will Areabar m Seal type [m/s] [ s ] nach DIN 24960 find recommendations for seals, with Without cooling Product circulation Sationary seat cooling Jacket cooling External cooling Temperature °C at the seal operating limits quoted for low-mineral A <10 <100 MG1, M7, H7 SAEGG <100 and demineralized water as defined in <20 <400 H7, H75 Q1AEGG <100 Vd TÜV Guideline 09.87 TCH 1466. B 5) <20 <800 H75 AQ1EGG <100 H7 Q AEGG <10 <250 1 <140 H75 AQ1EGG <20 <250 H75 G115 AQ EGG <120 C 12 H7 Q AEGG <20 <400 1 <100 H75 AQ1EGG 5) <20 <800 H75 AQ1EGG <100 H75 AQ M GG <10 <2002) 1 2 <160 a 4) b D H74-D Q AM GG in 1 2 re <20 <250 H75 G115 AQ EGG <120 ssu 12 re 6) P <10 <250 H75 G115 AQ 12EGG <140 H7F Q AEGG E 1 6) Pressure in bar <20 <400 <100 H75F, SHF75 AQ1EGG 7) F <50 <2500 HSHF, HF (V), SHF AQ12EGE <75 1) Boundary condition: t erf. м10K 3) Product circulation rate м 0.4 m3/h 6) Temperature at standstill 150 °C max. minimum differential to boiling pointt 4) See HTS system 7) Temperature at standstill 75 °C max. 2) p м16 bar 5) p Ϲ 80 bar; d Ϲ 50 mm Temperature of the medium °C 1 1 w S ha ft di am e ter d e e p S Bolling curve Te m p e ra tu re r te e m ia d ft a h S Absolute pressure PA (bar) Permissible operating ranges for the H7 series of seals in hot-water applications Cooling water for the stationary seat cooling system with product circulation, no additional cooling, demineralized water or similar as the The frictional heat generated by the seal faces is dissipated by cooling of the type medium, and Q1,/A face material combination. G115 stationary seat. Inlet temperature of the cooling water: 30 °C max. –1 = vg 18,4 m/s Example: p1 = 25 bar; Dw = 60 mm; n = 1.500 min ; t = 120 °C = vg 7 m/s Cooling water rate: Q = 5.2 l/min 124 Burgmann Mechanical Seals Design Manual 15.3 HTS – Hot water sealing without cooling Vent HTS seal system: Cooling No environmental pollution and a higher efficiency of operation for hot- 1 Seal cartridge cover plates are modi- water pumps are major arguments in favour of using the uncooled HTS fied to suit the given conditions of installation sealing system, quite apart from its various technical advantages. Heat exchanger 2 Safety throttle on the atmosphere side WED 3 Mechanical seal on the atmosphere Without cooling water means no supply pressure in the seal chamber is raised side system and none of the elaborate pipe- by a controlled amount. Vaporization of 4 Mechanical seal on the product side, for maintaining pressure work, controls or treatment equipment the medium in the sealing gap is pre- Magnetic filter which go with it. You have no heat loss vented, and so is the risk of dry run- Left: A set of booster pumps (KSB) at the MAF and no cooling arrangements. Tempera- ning. Through the special seal chamber Scholven power station (740 MW) which ture levels are therefore negligible, design and improvement to the pump- was converted to the HTS seal system which in turn makes for a higher level internal circulation, a large enough dif- of operational reliability. ferential over the vapour pressure is maintained under all operating condi- Twin temperature The system tions, without the sliding faces being sensor If the operating point (see seal selec- loaded with unduly high pressure. tion diagram) of the medium to be sea- (d1 = ... 120 mm; p1 = 25 bar; Mecanical seal led lies close to the vapour curve, the t = 160 °C; vg = 10 m/s). Notes on installation Hot water pumps Hot water For mechanical seals with a cooling sys- Without cooling With jacket cooling With stationary seat cooling tem to function properly the stuffing box and the pump hou- Cooling water OUT sing must be separated by a close clea- rence neck bush between the shaft/ shaft sleeve and the pump casing in front of the seal the heat transfer from the hot pump body to the stuffing box must be pre- vented by jacket cooling and an appro- priate design of the shaft sleeve the seal cooling circuit must be cor- rectly installed and the heat exchanger Cooling water IN must be of adequate size. Allowance Type RBS80/32 pumps (HALBERG) are must be made for correct venting. Tur- being used with Burgmann H7 S2 A speed-controlled hot-water pump bulence losses inside the mechanical seals without any cooling system in (Sulzer-Weise, ZF) at Munich-North seal chamber must be taken into ac- the hot-water circuit of the BASF com- thermal power station. Sealed with a count along with production of heat in pany’s ether plant in Ludwigshafen. To Burgmann type H74G15 seal. The long the sealing gap. prevent vaporization in the sealing gap, throttle bush from the pump casing to which would result in dry running, the the seal chamber allows for efficient cooling but requires a vent hole in the pressure in the stuffing box is raised by A hot water pump (Allweiler, CNH) ac- area of the seal as there is no exchan- means of a circulation line with orifice cording to DIN 25256, with a cooled ge of liquid. (API 610 Plan 11) coming from the di- seal chamber. Equipped with a Burg- scharge nozzle via by a throttle on the (d1 = 95 mm; mann type H74F1 seal. (p1 = 25 bar; t1 product side. p1 = 22 bar; t1 = 180 °C; = 207 °C). –1 (d1 = 48 mm; p1 = 6 ... 15 bar (sup- n = 500 ... 1,800 min ). ply); p2 = 28 bar (at pressure port); –1 t1 = 128 ... 170 °C; n = 2,900 min ). Burgmann Mechanical Seals Design Manual 15.3 125 Feed pumps Sealing systems featuring maximum operational reliability, convenient maintenance and low leakage rates with necessary environmental pro- tective measures are standard requirements in modern power stations. Sliding velocities in power station feed pumps can be as high as 60 m/s, so more often than not the only way to satisfy these demands is with spe- cial designs. A type SHF5/147 mechanical seal for a Main feed pump (CCM Sulzer) at St. water feed pump (Weir Pumps, FK4) Laurent nuclear power station (EDF), at the Ghazlan power station, Saudi France. Equipped with a Burgmann type Arabia. HSHFB 11/191 seal and WE 120 heat P o w e r s t a (p1 = 34 bar; t1 = 181 °C; n = 5,650 exchanger. (p1 = 28 bar; t1 = 188 °C; –1 –1 min ; vg = 47 m/s) n = 4,610 min ; vg = 48.2 m/s) Boiler circulation pumps Feed pump (Halberg) at Isar 1 nuclear power station with a Burgmann type SHV1/165 mechanical seal. Boiler circulation pump (Halberg) in the Paka combined (p1 = 20 bar; t1 = 185 °C; n = 5,000 power station (Pasir Gudang, Malaysia) sealed with type –1 min ; vg = 47 m/s) –1 SHPV2/90. (p1 = 75 bar; t1 = 288 °C; n = 1,450 min ). Boiler feed pump (KSB, CHTA) with a Boiler circula- Burgmann type SHV1/200-E1 mechani- tion pump (IDP) cal seal. in the San Antonio (p1 = ... 30 bar; t1 = 190 °C; n = 5,020 power station –1 min , vg = 57 m/s) (Texas, USA) with a Burgmann SHV3/125 (photo Boiler feed pump (Weller) at the right) and a 15,000 kW Bergkamen A power station closed-loop flush run jointly by STEAG and VEW with system. Running Burgmann type SAF2/165-E1 successfully since (p1 = 23.5 bar; t1 = 163 °C; March 1999. n = 5,100 min–1; v = 46 m/s) g (p1 = 170 bar; t1 = 340 °C). 126 Burgmann Mechanical Seals Design Manual 15.3 Flue gas desulphurization Modern coal-fired power stations are equipped nowadays with flue gas desulphurization plants. The scrubbing systems used by these plants work with a desulphurizing efficiency of better than 95 %. In preparing the absorption medium, lime or limestone and water are mixed to form a suspension which is fed continually into the scrubber washing solution circuit. Sulphur dioxide and flue-dust in the flue gas become attached to the drops of washing solution and are removed from the flue gas exhaust. The media to be sealed (absorber liquid, have been installed in Germany and sulphite and sulphate solution, filtrate, neighbouring countries since 1985 to lime slurry, etc.) are usually highly cor- seal pumps for flue gas desulphurization rosive and laden with solids (grain sizes plants (Allweiler, Düchting, Friedrichs- < 1 µm ... 200 µm), lie between 4 and feld, Habermann, Halberg, KSB, Netzsch, 10 in the pH scale, and have a chloride Seeberger, Sulzer, Warmann, Wernert). content of between 10,000 and 30,000 Many of the original mechanical seals, ppm (rising to 100,000 ppm in concen- e.g. those in the flue gas desulphurizati- trators). All the materials used are there- on plant run by Bremen Utilities, have had fore highly resistant to wear and corro- a useful life of more than 20,000 hours. sion. Residue evacuation pump (Haber- More than 2,500 seals from the Burg- mann) with HR222 S1/140 tandem seal mann HR series (d1 = 20 ... 250 mm) and QFT 2000. t i o n s Washing sus- Tank agitator pension circula- (Hoesch) with ting pump Burgmann (KSB-KWP) with HRLS1/80 for Kraftwerke a Burgmann type horizontal installa- HR321/290 tion in scrubbers mechanical seal. and oxidizers. Vertical condensate Boiler circulation pump (PRNR, pumps ENSIVAL) with SHV1/57-EF1 seal and WED20 heat exchanger. (t = 325 °C; Sealing systems for vertical condensate H = 122.95 kg/cm2; p = 120.5 bar) pumps must be designed in such a way as to ensure there is always liquid in the area of the seal faces, e.g. with a quench or buffer fluid pressurization. If, for exam- ple, the level of the medium drops, dry H7N single seal with throttle and quench on the atmosphere side running will thus be prevented. Example arrangements are shown to the right. H75NN/H75F1 tandem seal with liquid quench H74-D double seal with pressurized buffer medium Burgmann Mechanical Seals Design Manual 15.3 127 Pulp&Pap Wood is the most important raw material for the pulp and paper industry. It is either digested to chemical pulp in digesters or reduced to mechanical pulp in grin- ders or refiners. The pulp produced this way is then graded, bleached and washed, and conveyed to the paper machine. There it passes through the various stages, such as headbox, wire part, press section, drying section and reeling section. Treating the raw material Treating used paper Refiner (Andritz) with Burgmann H-D mechanical seals. Pressure grinder (Metso) for produ- A TMP (thermo- Material recycling must be a priority aim cing ground wood. By increasing the mechanical pulp) of every modern, economically orientated pressure the pulp structure can be loose- plant with more 20 industrial society. In no other sector has ned gently, increasing simultaneously the refiners (Metso) the collection and re-use of second-hand temperature and the degree of moisture. at the United Paper materials attained such significance as in Today most pressure grinders are equip- Mills in Kaipola, the paper industry. ped, therefore, with double seals. Finland. First the Example: HSSHR S8-D hogged wood is Deinking (flotation principle) (d1 = 470 mm; p1 = max. 7 bar; steamed at a tem- (see picture above) –1 t = 160 °C; n = ... 375 min ; radial dis- perature of appro- Pulp pumps and graders in the Deinking placement max. 1 mm). ximately 130 °C. plant of Stora Enso Werke are sealed Then it is decom- with Burgmann type HR10 seals (in posed in pressure refiners into its various A useful life of 3 years continuous opera- dead-end arrangement). Flushing with fibres. The complete plant is equipped tion without recondition-ing is the norm. circuit water (return water) is carried out with Burgmann type HSH-D double seals. (d1 = 325 mm; p1 = 15 bar; only when the medium has an excessi- Seals of this type have been employed t = 207 °C; vg = ca 40 m/s) vely high solids content. The face mate- with great succes in refiners since 1975. rial combination is SiC/SiC. (d1 = 46 ... 130 mm; p1 = 2 mWS; t = 60 °C; n = 980 min–1; medium = pulp [0,2 ... 5 % abs. dry] with a high content of air.) 128 Burgmann Mechanical Seals Design Manual 15.3 er Treatment and transportation of finished pulp Paper finishing Pulp box propellers (Bellmer), pres- For a smoother and glossier finish, the sure graders (Lamort, Voith Paper, paper leaving a papermaking machine is Sulzer, Andritz, Metso), fiberizers and conveyed to a calender. Any irregularities vertical spreaders are sealed with type in the paper are leveled out by the combi- HJ977GN,MFL85N,HR10 or LP mechani- nation of an assortment of rolls in the cal- At Stora Enso, Burgmann cal seals, according to the pulp concen- ender, heat and high line pressures. HR10 seals without external tration (5 % abs. dry and above). Silicon Burgmann type MFLW80 S1/475 mecha- flushing are used in pulp carbide is used as sliding material. nical seals are used to seal off from the pumps (Sulzer) for densities atmosphere the oil that serves to heat the up to 5 % abs. dry. Digesting and bleaching plant rolls and lubricate the bearings. These Also in operation there are pumps In view of the chemicals used in this area seals are running successfully in, for (Voith Paper, Andritz, ABS, Goulds) fitted and the governing environmental provi- example, rolls built by Voith Paper, with Burgmann HJ977, LP, MG 12 seals sions, Pumps are equipped with double Kleinewefers and Küsters. seals. At PWA Kehlheim, for example, for densities up to 4 % abs. dry and oper- (p1 = 0 ... 6 bar; around 40 pumps (Allweiler) have been –1 ating predominantly with pump-internal t1 = 20 ... 300 °C; n = 600 min ; circulation or white/black water system. equipped successfully with type M7N Axial displacement max. ± 7 mm) seals in back-to-back arrangement. Pulp pump (Egger) (The above picture shows a Voith Paper with Burgmann Pulpers calender sealed with Burgmann mecha- HJ977GN Woodpulp is disintegrated in additional nical seals) water to form a pulp suspension capable of being pumped. The rotor shaft/through interface is sealed with double and single arrangements. The face material combi- nation on the product side of the Pulp & Paper Burgmann seal is carbide/carbide. Pulp density is approx. 4 to 8 % abs. dry. LP-D double seal in dead-end operation Burgmann LP seals are used in a diver- sity of applications in the paper and pulp Eccenter screw pumps (Netzsch) with industry (pumps, agitators, pulp dis- MG155 in paper finishing. solvers, shredders, etc.). Huge volumes of water are consumed wherever double seals are required. However, the new buffer water-saving method of operation of the specially designed LP-D in dead- end arrangement means that up to 2,600 3 m of water and sealing area (e.g. d1 = Pulp pumps 50 mm) can be saved. Further savings Principle of the LP-D dead-end. (Ahlström) with are enabled because buffer systems and A Industrial water IN B Outlet LP dead-end closed. The water circu- water treatment are no longer necessary. seal lates in the seal, the seal acts as heat exchanger. Only the natural but slight leakage needs to be replaced. The special leaflet: „Sealing technology in the pulp and paper Industry“ contains in-depht information about this subject. Please ask for a copy. Burgmann Mechanical Seals Design Manual 15.3 129 Waste w Sewage works Municipal and industrial sew- age is conveyed by waste water pumps into collection tanks at the sewage works. Raw sludge from the settling basins is then pumped into digestion towers where it is circulated by so- called digested sludge pumps through heat exchangers. The methane gas released during the digestion process is used for heating purposes, as is the sewage sludge itself to an ever greater degree. Sewage works pumps are usually operated with single seals in either a dead-end arrangement (conical) seal chamber or with product circu- lation or external flushing (cylindrical seal chamber). Depending on the require- ments, the following seals have proven successful: MG1, HJ977GN, MFL85N, HR. Raw sludge pumps (KSB, KRK 150– 37), equipped with Burgmann type HJ977GN mechanical seals (dead-end arrangement) in the Grosslappen sewa- ge works run by Munich Utilities. (d1 = 72 mm; p1 = 3 bar; t = 15 °C; vg = 6.5 m/s). Non-clogging pumps (KSB, KWP) A submersible aerator (Frings) for with Burgmann type MFL85N mechani- oxygen enrichment of sewage basins. cal seals (Q Q ,V T G ) in a 5-stage bio- 12 1 6 1 Units of this type are sealed successfully logical sewage works run by DEA Union- with Burgmann MFL85N and MG1 me- Kraftstoff AG, Wesseling, for the bioche- chanical seals. mical elimination of nitrogen in ammo- nium-enriched refinery waste water. The Non-clogging pumps (Schulte type useful life of these seals in dead-end ar- VP) at the special waste incineration rangement is between 3 and 4 years in plant in Nuremberg. Equipped with Burg- Sewage block pump (Herborner, Type the 30 pumps installed at the works. mann type HR cartridge seals (pressure- Unipump) for pumping contaminated (d = 53 ... 90 mm; p = 2 ... 4.5 bar; 1 1 less quench), the pumps convey liquid di- fluids containing solids up to 80 mm t = 20 ...40 °C; n = 950 ...1,450 min–1). with a double mechanical seal (MG1/ gested sludge to the treatment station or M3S35 on the product side) in tandem to the incinerator. (t = 20 ... 90 °C; n = arrangement. Quenching fluid: oil. 1,450 min–1). 130 Burgmann Mechanical Seals Design Manual 15.3 ater systems Submersible pumps The building industry makes intensive use of submersible pumps because of their mobility. Thanks to their liquid- tight and pressure-proof design they are equally popular in waste water systems. Pumping capacities of up to 5000 m3/h and pum- ping heads up to 70 m are possible with these pumps. Particularly in buildings pits, the pumping medium consists of dirty water severely contaminated with sand and stones. The solids content is often as high as 50%, with particles of up to 30 mm in diameter and with soft items such as rags, paper and so on. Drive Oil bath Product side Biological sewage A reliable and proven shaft seal solution works in Ludwigs- hafen/Rhein. The for submersible motors in pumps, aera- sewage sludge tors, agitators, etc. is the MG1 series of incinerator can be elastomer bellows seals in tandem arran- seen in the back- gement. Silicon carbide/silicon carbide round (Photo: BASF) is mostly used as the face material combi- nation in the primary seal. Dry running is prevented by an oil quench. Submersible pump (ORPU “Söffel“) water Waste for pumping pure water and water conta- minated with solids of up to 5 mm grain size. Sealed with the Burgmann type MG1. Submersible pump (ABS) installed in stationary position in a sewerage over- flow tank. It is sealed with a Burgmann MG1 in tandem arrangement. (Q = ... 6500 m3/h; H = ... 60 m) Submersible agitators (ABS, RW10– 40S) for use as flow accelerators and for the mixing of activation basins in sewage works. Type MG1 mechanical seals with the face material combination SiC/SiC are being used with success. Non-clogging pump (Ritz, series 38) For domestic and industrial sewage con- taining solids (Q = ... 2000 m3/h, H = ... 90 m), sealed by Burgmann mechani- cal seal MG1 in single design without flush. Submersible pump (HOMA,type A) for Submersible pump (Jung, UAK) with a fixed-site pumping of waste water, sewa- type MG1 mechanical seal.(d1 = 45 mm; –1 ge and sludge. It is sealed with a Burg- p1 =10 bar; t =120°C; n = 2920 min ; mann Type MG1 seal in tandem arrange- Q = 500 m3/h). ment. (Q = ... 1800 m3/h; H = ... 60 m). Burgmann Mechanical Seals Design Manual 15.3 131 Shipping With automations in marine ap- plications and the protection of our seas, the sealing technolo- gy is becoming increasingly im- portant. Burgmann seals meet these high economical and eco- logical demands and have been certified or authorised by many shipping institutions. Lubricating oil pumps PLEUGER submersible Vertical screw pumps (Allweiler, SNS) motor used to convey lubricating oil to the ship’s power drive system. They are sealed by Burgmann M7N seals with SiC/SiC as the face material combina- tion. (p1 = 6 bar; t = 160 °C; Q = 27 m3/h). Dredging pumps A submersible motor (Pleuger, VN RW 30-130-4) used to drive dredging pumps and cutter heads. The motor/ Stern tube pump coupling is sealed by a type Reliability, a long service life and M74/130 mechanical seal in a en-vironmental protection were the back-to-back arrangement. Tap wa- decisive arguments for using the ter is used as buffer fluid and the water-lubricated stern tube seal face material combination is TC/TC. 4600 (fig. on the left) in the motor These seals have an average life of ship “Raab Karcher 105" (shown 15,000 h. (n = 1,500 min–1). above). The integrated pneumostop permits maintenance of the seal with the ship afloat. Cooling water pumps, etc. Pumps are put to many different uses on a ship. Waste water pumps, ballast “Water-Jet“ pumps, bilge pumps and trimming A “foil cat“ katamaran (Kværner- pumps are just some of the many pos- Fjellstrand) with a waterjet drive. sibilities. A typical example is the verti- The input shaft is sealed by a semi- cal centrifugal pump (Allweiler) pictu- split Burgmann HGH (also refer to red above, with the often used Burg- page 56). mann type M32N seal featuring car- bon graphite/SiC as the face material Bulkhead pipe fitting combination. Metallic parts are made of 1.4571 and O-rings of Viton®. Burgmann 3200 seals ensure a re- liable sealing against an inrush of water into neighbouring ship com- partments when drive shafts are passed through several bulkheads, increasing the safety from being flooded. 132 Recommended seals e.g. for standardization projects in the sugar industry Sugar cam- MG1-G6. The elastomer bellows seal. paigns are over Rugged and equipped with a freely rin- sed spring. Seat connection according in a relatively short to EN 12756. Can be used as single, time. For optimum tandem and double seals. economy and ecology it HJ977GN. The standard seal with en- capsulated spring. Flume water pump, mash pumps is all the more import- for unloading and transporting beets to ant, therefore, to have a the washing plant. The water is heavily reliable sealing system. contaminated with sand and earth, im- posing high requirements on the wear In the past it was normal resistance of the face materials and on for juice pumps to be the ruggedness of the seal. The Burg- equipped with double mann MG1, used as a single seal in a dead-end arrangement, has an excellent seals to cope with the track record in this area.Biologische tendency to crystalliza- Kläranlage in tion and carbonation. Today Ludwigshafen/ Rhein. Im Hinter the use of single seals is grund die Klär- HRZ. Mechanical seal with rotating schlammverbren- possible in most cases seat. Rugged single spring facing away nungsanlage. due to the availability of from the product. Can be used as a (Foto: BASF) single seal and in tandem with an modern materials and new MG1-G6 on the atmosphere side. seal compartment geome- Shipping / Sugar industry Sugar industry tries. Thick juice pumps for transporting thick juice (70 ... 75% sugar content) from the evaporator station to the gra- nulation station. Seals in tandem arra- ngement (HJ977GN or HRZ/MG1) with pressureless quench. MR-D. Double agitator seal with seat rotating in the product. With bearing. Worm-type agitators in the boiler of the granulation station keep the magma (approx. 45% sugar granule content) Multi-stage evaporator station where the clarified juice is evaporated in several moving. Double seal with seat rotating phases to form thick juice (70 ... 75% sugar content). The juice circulating in the product, Burgmann MR-D. pumps used for the circulation are equipped with tandem seals MG1-G6/MG1-G6 and HRZ/MG1. Burgmann Mechanical Seals Design Manual 15.3 133 Sterile processes In addition to meeting technical requirements a seal Materials which are compatible with food has to display many other charac- Smooth and abrasion-proof surfaces which are teristics in connection with easy to clean Complete units which can be cleanliness, health and general sterilized and cleaned without having to be dis- legislation. These in mantled (SIP/CIP). Burgmann mechanical clude for example: seals have been used world-wide with great success in sterile processes for over 20 years. Filter dryer (Rosen- mund Gueda) Agglomerator with Burgmann M451 KL(T)-D and The agglomerator (Harrislee) is used to AGS451 KL-D (p1 = convert crystals into micropellets with vacuum ... 6 bar; good filling properties. X-ray contrast t1 = –20 ... 200 °C; n = 5 ... 50 min–1; media are then produced from the pellets axial movement) and an injection solution (Schering, 100 ... 700 mm) Berlin). The tilting agitator shaft is sealed by a Burgmann MR 33 S1-D seal with the sterile supply system TS 3004. All materials are CIP/SIP-resistant and come with FDA approval. p1 = vacuum ...3 bar; t1 = 120 °C; n = 30 min–1. Aseptic pump (Fristam) with the Burgmann TS 3004 sterile supply system.. Burgmann MR33-D – the standard agitator seal for sterile processes Centrifugal pump (KSB, Vitachrom) for con- Spherical dryer (Rosenmund Gueda) for the veying liquid foods, equipped with a production of pharmaceutical powders, with Burgmann SHJ92GS4 seal (pump and seal Burgmann HSMR5L-D (main and chopper with EHDEG certification). shafts). Operating data: p1 = vacuum ... 6 bar; t = –20 ... 200 °C; n = 3 ... 35 min–1 main shaft; Food pumps = 900 min–1 chopper shaft Pumps with hydraulic components made of deep-drawn stainless steel plate are Dairy typical for the food industry. Additional Eccentric pumps (e.g. Allweiler, Netzsch) electropolishing produces high-quality are a favourite choice for pumping and surfaces as the basis for trouble-free filling applications be- cause they exert cleaning. little stress on the product. Depending on Sterile pump (Hilge Euro-Hygia-CN) for diverse applications according to FDA/ GMP the specific conditions they are sealed A special leaflet “Sterile Processes“ provides standards, equipped with a Burgmann with seals of the Burgmann M3 range or detailed information about this subject. SHJ97GS3 seal (pump and seal with EHDEG SHJ977G. Please ask for a copy. certification). 134 Burgmann Mechanical Seals Design Manual 15.3 TechnicsTechnical Information Balance ratio ...... 137 Coefficient of friction ...... 138 Concentricity tolerance ...... 141 Conical spring ...... 142 Cooling water requirements ...... 138 Extrusion characteristics of O-rings .141 Gap height ...... 138 Heat transfer ...... 138 Installation ...... 141 Leakage ...... 139 Load factor ...... 138 Mechanical seals to API 610 ...... 137 Mechanical seals to EN 12756 . . . .136 135 Notes on Design, Installation and Operation Power consumption ...... 138 Power consumption of the sliding faces ...... 139 Pressure vessel regulations ...... 142 Pumping screws ...... 140 Screw locking ...... 142 Seat locking to EN 12756 ...... 137 Shrink disk ...... 142 Sliding pressure ...... 138 Sliding velocity ...... 138 Super sinus spring ...... 139 Surface finish ...... 141 Surface roughness ...... 138 Symbols ...... 136 Torque transmissions ...... 142 TTV O-rings ...... 142 Turbulence losses ...... 138 Vapour curves ...... 140 Viscosity ...... 142 Burgmann Mechanical Seals Design Manual 15.3 135 Technical Information Mechanical seals according to EN 12756 (code system) Within the scope of this manual it is only possible to provi- For single mechanical seals there is a distinction drawn between standard (N) and short (K) types. For double mechanical de a brief outline of the major seals (back-to-back) DIN specifies the short type only. prin-ciples and features of me- chanical seals. We shall be glad to give you more detailed Single seal documentation on request. Position Designation Description 1 2 3 4 5 Symbols N = standard type with I1N Spring K = short type with I1K Seal face A Area of sliding face C = type C Stationary seat AH Area hydraulically loaded by medium Secondary seals pressure U = no shaft step B = with shaft step b Width of sliding face C = O c Specific heat capacity D Outer diameter of sliding face Nominal diameters d1 and d10 of the mechannical seal d Inner diameter of sliding face Shaft/shaft sleeve diameters are always three-digit numbers beneath the stationary seat for types U and B Da Outer diameter of bellows d H Hydraulic diameter Direction of rotation of the mechanical seal D i Inner diameter of bellows Type N and K Type C dm Mean diameter of sliding face (is also the spring winding direction) Other metal parts (except seal cover and shaft sleeve) Dw Diameter of shaft R = clockwise f Coefficient of friction Looking from the stationary seat toward the seal face Looking from the drive side with the shaft with the seal face rotating in clockwise direction rotating in clockwise direction Ff Spring force h Gap width L = anti clockwise H Delivery head of pumping screw Looking from the stationary seat toward the seal face Looking from the drive side with the shaft k Balance ration with the seal face rotating in anticlockwise direction rotating in anticlockwise direction k1 Pressure gradient factor S = independent of direction of rotation n Speed Spring type (state single spring or multiple springs in your order) p1 Medium pressure p2 Atmosphere pressure Pinned stationary seat p3 Buffer fluid pressure O = no torsion lock, without anti-rotation pin ⌬p p1–p2; p3–p1; p3–p2 1 = with torsion lock, with anti-rotation pin 2 = for type C pf Spring pressure pG Sliding pressure Materials (see inside end cover of manual for the material code) pr Calculated load for the frictional force of the secondary seal Double seal PR Power consumption of sliding faces Position PV Turbulence loss through rotating Designation Description 1 2 345123 . parts V Delivery rate Q Mechanical seal leakage rate U = no shaft step Spring Ra Mean roughness index (calculated) B = with shaft step · on product side t,T Temperature of the medium to be C = type C sealed Other metal parts Seal face inboard ⌬T Rise in temperature of the medium U = no shaft step Sliding face outboard B Stationary seat inboard Stationary seat outboard to besealed = with shaft step on atmosphere side Secondary seals inboard · Secondary seals outboard C = type C t3 Temperature of the buffer medium v Sliding velocity g Nominal diameters d1 and d10 (always three-digit numbers) Dynamic viscosity ⑂ Load factor Direction of rotation (see single seal) Density Anti-rotation pin for stationary seat on the atmosphere Kinematic viscosity and/or product side 0 = without anti-rotation pin 1 = with anti-rotation pin for stationary seat on atmosphere side 2 = with anti-rotation pin for stationary seat on product side 3 = with anti-rotation pin for stationary seat on the atmosphere and product sides 4 = for type C Positive retention for stationary seat on the product side 0 = without D = with E = for type C Materials (see inside end cover of the manual for the material code) 136 Burgmann Mechanical Seals Design Manual 15.3 Seal and Material Code to API 6101) Seat locking*) Balance ratio Mechanical seals are identified in terms 5th letter: to EN 12756 The balance ratio is a non-dimensional of their materials and design features on Face materials (see Table H-5) factor of the mechanical seal and is defi- the basis of the following classification Example: BSTFM = balanced single seal ned as system: with throttle bushing seal gland, statio- 1st letter: nary and sealring-to-sleeve gasket made Locking ring hydraul. loaded area A k = H B = balanced of FKM, with carbon against tungsten area of sliding face A U = unbalanced carbide 2 as face materials 2nd letter: S = single Notes T = unpressurized, dual Hastelloy® C is to be used as spring D = pressurized, dual material for seals with multiple springs. 3rd letter: Single springs and other metal parts are unbalanced k >1 Seal gland type: to be made of austenitic stainless steel P = plain, no throttle bushing, (AISI Standard type 316 or equal). T = throttle bushing with quench, Metal bellows are to be made of a mate- leakage and/or drain rial recommended by the manufacturer connections and should have a maximum yearly cor- A = auxiliary sealing device, rosion loss of 50 µm. (type tot be specified) A metal seal ring shall not have sprayed balanced k <1 overlay in place of a solid face. 4th letter: Gasket materials (see Table H-4) In practice k values are selected between 0.65 and 1.2. With a lower k value, the safety against thermal overload will d4mtt d9m Tabelle H-4 – 4th letter increase, but the mechanical seal may d d Ul Bi Ui Bi l l e d Secondary seals 1 2 5t 6 sz also lift off more easily. stationary dynamic 10 14 22 26 26 30 1.5 4 4 –0 E FKM PTFE 12 16 24 28 28 32 1.5 4 4 –0 14 18 26 34 30 38 1.5 4 4 –0 F FKM FKM 16 20 28 36 32 40 1.5 4 4 –0 G PTFE PTFE H Nitrile Nitrile 18 22 34 38 38 42 2.0 5 4 31.2 I FFKM FFKM elastomer 20 24 36 40 40 43 2.0 5 4 33.2 I) O-ring seal R Graphite foil Graphite foil 22 26 38 42 42 46 2.0 5 4 35.2 X As specified As specified 24 28 40 44 43 48 2.0 5 4 37.2 25 30 41 46 46 50 2.0 5 4 38.2 Z Spiral shaped Graphite foil 28 33 44 49 48 53 2.0 5 4 41.2 30 35 46 51 50 60 2.0 5 4 43.2 Tabelle H-5 – 5th letter 32 38 48 58 53 62 2.0 5 4 46.2 Face materials 33 38 49 58 53 62 2.0 5 4 46.2 35 40 51 60 60 65 2.0 5 4 48.2 Seal face Seat L Carbon Tungsten carbide 1 Co* 38 43 58 63 62 67 2.0 6 6 53.5 M Carbon Tungsten carbide 2 Ni* 40 45 60 65 65 70 2.0 6 6 55.5 II) metal bellows seal N Carbon Silicon carbide 43 48 63 68 67 72 2.0 6 6 58.5 45 50 65 70 70 75 2.0 6 6 60.5 O Tungsten carbide 2 Ni* Silicon carbide Information Technical 48 53 68 73 72 77 2.0 6 6 63.5 Unlike an O-ring seal, the hydraulic dia- P Silicon karbide Silicon carbide 50 55 70 75 75 86 2.5 6 6 67.5 X As specified As specified meter of a bellows seal is not a fixed geo- 53 58 73 83 77 88 2.5 6 6 70.6 metric value. It is conditional an the abso- *) binder material 55 60 75 85 86 91 2.5 6 6 72.6 58 63 83 88 88 93 2.5 6 6 75.6 lute level of the pressure to be sealed 60 65 85 90 91 96 2.5 6 6 77.6 and on the direction of pressurization Tabelle H-6 – Temperature limits for seal materials and bellows 63 68 88 93 93 98 2.5 6 6 80.6 (internal or external pressure). 65 70 90 95 96 103 2.5 6 6 82.6 Ambient or medium temperature 68 – 93 – 98 – – – 6 88.6 min. °C °F max. °C °F 70 75 95 104 103 108 2.5 7 6 90.2 75 80 104 109 108 120 2.5 7 6 95.2 PTFE – 75 – 100 200b) 0400b b) b 80 85 109 114 120 125 3.0 7 6 103.0 Nitrile – 40 – 040 120 0250 85 90 114 119 125 130 3.0 7 6 108.0 b) b Neoprene – 2000 – 040 090 0200 90 95 119 124 130 135 3.0 7 6 113.0 FKM – 20 – 040 200b) 0400b 95 100 124 129 135 140 3.0 7 6 117.5 Metal bellowsa) – –23 ––0– 100 105 129 134 140 145 3.0 7 6 122.5 FFKM – 012 – 010 260 0500 *) not applicable for seats made of carbon. Graphite foil – 240 – 400 400b) 0750b) Glass-filled PTFE – 212 – 350 230 0450 Mica/grapite – 240 – 400 700 1300 Ethylene propylene – 057 – 070 180 0350 1) 8th edition, August 1995 a) Consulte manufacturer b) The maximum temperature in a non-oxidizing atmosphere is 870 °C (1,600 °F). Burgmann Mechanical Seals Design Manual 15.3 137 Technical Information Contact friction Boundary friction Liquid friction Roughness 10µm 5µm 1µm 0,1µm Degree of precision turned ground tapped polished roughness in relation to the percen- tage bearing Percentage. bearing area 4% 12% 40% 95% Coefficient of friction f Hydrodynamic coeff. (G) Surface roughness Turbulence losses Pv Load factor ⑂ Coefficient of friction f Microfinished sliding faces made of The turbulence-related consumption of various materials display the following power is not significant until the circum- The balance ratio is just a non-dimensio- The coefficient of friction f is conditional average, arithmetic mean roughness ferential speed reaches 30 m/s. It must nal factor used to assess a mechanical on the materials that are in contact, the values (Ra): be given due consideration particularly seal. A second one is the load factor ⑂. medium being sealed, the sliding velocity with special seals. and the design-related conditions of s p ±p Tungsten carbide, 0,01 µmm f r contact between the sliding faces. tungsaufnahme ⑂ = k + nickel-bonded ⌬p For general considerations and calculati- Silicon carbide (SiC) 0,04 µmm ons (see following sections), a coefficient Power consumption Special cast Cr-steel 0,15 µmm of friction of between 0.05 and 0.08 can The balance ratio and the load factor are Carbon graphite 0,10 µmm be applied as a good approximation. As The total power consumption of a mecha- practically identical when the pressure Aluminium oxide 0,15 µmm differentials to be sealed are large. The can be seen in the graph, a lower value nical seal is calculated from C-SiC-Si/C-SiC 0,15 µmm friction at the dynamic secondary seals pr is obtained under improved conditions of The power consumed by the sliding lubrication, e.g. due to partial build-up of faces. is usually disregarded in the calculation. The lower the roughness value, the higher hydrodynamic pressure in the sealing The power consumption due to turbu- the percentage bearing area and hence the gap. On the other hand, when a mecha- lence created by the rotating parts. higher load capacity of a mechanical seal. nical seal is run under purely hydrodyna- Sliding pressure pG mic conditions of operation, the coeffi- cient of friction will rise as the speed Example: The term “sliding pressure“ is understood dm = 170 mm increases – similar to hydrodynamic bea- –1 to be the surface pressure on the two m rings. n = 4500 min sealing faces which remains after sub- vg = 40 m/s tracting all those forces that act on the seal face and which are balanced by hydraulic pressures. The sliding pressure Gap width h is conditional on the pressure differential to be sealed, the balance ratio, the pres- Seals with contacting faces sure conditions inside the sealing gap i.e. In contact seals with a theoretically par- Mean sliding face diameter d (mm) gap between the seal faces (pressure allel sealing gap, the distance between gradient factor) and the spring pressure. the two sealing faces is conditional on Sliding verlociti vg the roughness of the surfaces. The pressure gradient factor k1 can assu- Numerous measurements taken in the me values between 0 and 1, depending Sliding velocity v appropriate measures in order to stop the on the geometry of the two sealing faces. laboratory and in practice with due allo- g seal from overheating. The necessary wance for external factors indicate that a For sealing gap geometries which con- The sliding velocity is usually quoted in fluid flow rate for removal of the power mean gap width of less than 1 mm can verge in leakage direction – V-gap for relation to the mean sliding face dia- losses is calculated by be used as a basis for calculating the externally pressurized seals – the value meter. of k is > 0.5, while for sealing gap geo- normal degree of leakage. . P + P 1 V = g R V metries which diverge in leakage direc- ⌬T · c · tion – A-gap for externally pressurized Seals with non-contacting faces Hydrostatically or hydrodynamically ba- Cooling water seals – the value of k1 < 0.5. For simpli- Under certain conditions of installation or lanced, non-contacting mechanical seals fied calculations the value of k1 is gene- requirements operation heat may pass from the pro- rally taken to be 0.5. Under unfavourable adjust automatically to a defined gap duct to the sealing compartment and will conditions the sliding pressure can beco- width during operation. The width of the When estimating the amount of cooling need to be taken into account when cal- me negative, causing the sealing faces to gap depends mainly on the shape of the water required by heat exchangers it can culating the circulation rate. open resulting in excessive leakage. gap in radial as well as circumferential be assumed that the temperature of the direction, on the operating conditions and cooling water will increase by 5 K bet- Example calculation: on the medium. ween the inlet and the outlet. This means P = 420 W (1 W = 1 J ) ⌬ R s pG = p · (k – k1) + pf that 1 l/min of cooling water dissipates ⌬T = 10 K 350 W. Fluid: Water; c = 4200 J (kg · K) Heat transfer = 1 kg / dm3 . 3 The total power consumption of a mecha- V = 420 W · kg · K · dm nical seal has to be dissipated into the 10 K · 4200 Ws · 1 kg medium or the buffer fluid by means of = 0.01 l/s = 0.6 l/min 138 Burgmann Mechanical Seals Design Manual 15.3 Power consumption PR of the sliding faces Leakage rate Q The power consumption through friction Calculated rates of leakage and power PR = (⌬p · k + pf) · vg · A · f Factors influencing of the sliding faces is calculated by the losses are not guaranteed values. They leakage equation are statistical and calculated mean values which are determined on the basis The major factors with an influence on a *Example M7: of experience and extensive testing. The mechanical seal’s leakage rate, correct ⌬p = 5 bar functioning and reliability include: Dw = 100 mm leakage rates and power losses which n = 1000 min–1 actually arise in a particular seal can be Machined finish of the sliding faces PR = 310 W several times higher on account of fac- Flatness of the sliding faces and flat- tors that are impossible to quantify theo- ness deviations caused by thermal or *unbalanced pressure-induced deformations rotating seal retically. As can be seen from formula, the leakage rate is mainly conditional on Machine vibrations or stability the actual gap width during operation. Mode of operation of the plant This depends in turn on many factors Characteristics of the medium to be (see the section on Gap width). sealed Correct installation of the mechanical Differential pressure to be sealed power consumption through friction seal *Example H7: ⌬p = 20 bar Formula for externally pressurized mechanical seals Dw = 70 mm n = 1000 min–1 h3 Q = 1,885 · 10-4 · ⌬p – 7,752 · 10-19 · · n2 · (D2 – d2) PR = 215 W D [ ] · ln · ( ) *balanced rotating d seal Example calculation for a H7N/48 seal 0,273 D = 56,9 mm h = 0,27 mm Q = ⌬ Differential pressure to be sealed power consumption through friction 56,9 d = 51,9 mm p = 18 bar -4 –1 3 4,7 · 10 · ln ( 51,9 ) n = 3000 min = 983 kg/m -4 = 4,7 · 10–4 Pa · s Atmosphere 4,7 · 10 · ln ( side [1,885 · 10-4 · 18 – 7,752 · 10-19 · 983 · 30002 · (56,92 – 51,92)] Q = 1,543 ml/h Product side Product side Super-Sinus spring externally internally pressurized pressurized Differential pressure to be sealed power consumption through friction Range of Balanced stationary seal of the HRC series tolerance ± Example M48-D: Information Technical ⌬p = 14 bar Dw = 50 mm Conventional n = 100 min–1 wave spring Force F PR = 70 W Super-Sinus-spring Light-duty agitator seals (PN 16) Nominal installation length Spring stroke Differential pressure to be sealed power consumption through friction Example The Super-Sinus spring permits an al- HS-D: ⌬p = 32 bar most uniform introduction of forces over Dw = 50 mm the whole range of increased axial move- n= 100 min–1 ment tolerances of mechanical seals, e.g. PR = 195 W M7N/H7N. The one-piece spring is end- Heavy-duty agitator less and has a very flat characteristic. seals (PN 40) The Super-Sinus spring has no welding spots to minimize corrosion. It is regu- larly made of 1.4571, optionally of Hastelloy®. Differential pressure to be sealed power consumption through friction Burgmann Mechanical Seals Design Manual 15.3 139 Pumping screws Vapour curves Dowtherm A – azeotropic mixture of 26.5% diphenyl and 73.5% diphenyl oxide Coolant OUT Coolant OUT Type "B" critical points Type "A" e melting points en nz e B e n e l l a Drive side y t h l n l e p o e o h a n n u i e r ip N e h ol D c P T ly G Coolant IN Pumping direction Pumping direction Coolant IN "from drive" "towards drive" Direction of shaft rotation clockwise l o (looking from the drive) n a h t E Pumping screws are used to boost the Explanation Acetaldehyde e circulation of coolant for single and The diagram shows a multi-stage centri- n e z n e double mechnical seals. e in fugal pump with clockwise rotation b z r n o A l e h B The direction of flow, delivery head and type B m (looking from the drive side), a r C e th delivery rate can be adapted to the given mechanical seal with pumping direction w o operating conditions by suitable design “from drive” on the drive side, and a D r measures. type A mechanical seal with pumping e te d i a r o W l Pumping screws are dependent on the e direction “towards drive” on the non- h id c r l lo y h direction of rotation. “F” h t An in the drive side. Ethylene glycol c a E tr e drawing number stands for a pumping t n o e b screw. It follows after the type code. ilin r Direction of Pumping Pumping Coding for the n e a A id C x shaft rotation direction screw various ro The optimum arrangement is afforded by e p (looking from type components id n c e a e the contra-rotating pumping screw g t n drive) ro ti o d e t y c e H A c where the thread of the stationary screw A towards pumping screw Ar A d i e (pumping sleeve) faces in opposite direc- drive c n pumping sleeve Al a e e e c s d n i o y right m r h a tion to the rotating thread (pumping r e e p pumping screw Bl o K o from F ld r B ta P e screw). drive pumping sleeve Br c A towards pumping screw Bl e id B h drive lp pumping sleeve Br e u ne n le a s left y x n th e e from pumping screw Ar e H g o o A lr r ho d drive pumping sleeve Al ic y Tr e H tan r u e b h ol t so e Contra-rotating pumping screw n le I n a y a th th h e e t Item 1 Pumping screw i E M D Item 2 Pumping sleeve e n ia le n y o p e o n m r e m P l A y th E Pumping capacity of various pumping screws with pump- ing Pressure abs. (bar) A sealing system for hydrocarbons must Acetaldehyde Ethylenre glycol often make allowance for partial dry run- Acetone Glycerine Formic acid Isobutane ning due to their low boiling points. Pressure p [bar] Ammonia Hexane However with the right design features Aniline Kerosene and face materials, it is possible, to gua- Benzine Methanol rantee failsafe operation of the mechani- Benzene Naphtalene Chlorobenzene Phenol cal seal. The operating temperature must Rate by volume V [l/h] Diethyl ether Propane be at least 5 K lower than the boiling Diphenyl Propylene point under operating pressure. Dowtherm A Hydrogen sulphide ... without pumping sleeve Acetic acid Carbon tetrachloride Ethanol Trichloroethylene Ethane Toluol Ethylchloride Water Ethylene Hydrogen peroxide Pressure p [bar] Type H74F Medium: water n = 3000 min–1 s = 0.5 mm Rate by volume [I/h] 140 Burgmann Mechanical Seals Design Manual 15.3 Technical Information We wish to draw attention to the Axial run-out Surface finish Extrusion characteristics installation and operating instruc- tions which are available for the Mounting face Finished surfaces according to of elastomeric O-rings various sealing systems. The infor- Axial run-out depends on the speed. EN 12756 The extrusion resistance of elastomeric mation in the following sections is Permissible values are indicated by the O-rings can be greatly enhanced by the intended as no more than a general graph. use of support rings. guideline. Prior to installation To fit a seal you will need its installation and operating instructions with the cor- rect drawing. Before starting, check the Extrusion dimensions, the maximum acceptable deviations and the geometrical tole- rances of the machine. Pressure differential (bar) Edges and shoulders Mean roughness No Extrusion All edges and shoulders onto or into Secondary seal index Ra Shore A hardness which the mechanical seal is pushed dur- material bw ing installation must be chamfered, de- Elastomers 2.5 µm 0.8 µm burred and rounded off to less than Non-elastomers or 30 ° x 2 mm. optional use of 1.6 µm 0.2µm Total radial clearance in mm Dimensional deviations Permissible tolerance (mm) elastomers and non-elastomers Acceptable deviations for dimensions Speed n (rpm) having no tolerance specification: DIN ISO 2768 Part 1, fine/medium for linear and an- Installation gular dimensions Part 2, tolerance class K for general Absolute cleanliness and care are Screw locking Series MFL geometrical tolerances essential when fitting mechanical seals. If no special provision is made for locking Dirt and damage to sliding faces and O- screw threads, use set screws with a suit- Concentricity tolerance rings jeopardize a seal’s function. Any able adhesive (e.g. Loctite) after remov- protective covering on the sliding faces ing any grease. Shaft in accordance with DIN must be removed without trace. Never put ISO 5199 lubricant on the sliding faces - mount on- In the area of the mechanical seal the ly in a completely dry, dustfree and clean Series MG shaft concentricity tolerance must not ex- state. The accompanying installation ins- ceed 50 µm for diameters < 50 mm tructions and the notes on the assembly 50 µm, 80 µm for diameters between 50 drawings must be observed exactly. and 100 µm, and 110 µm for diameters Never over-compress metal bellows seals. > 100 µm. Fitting advice Apply the axial mounting force needed to To reduce the friction an O-rings when push the seal onto the shaft via the bel- Seal chamber bore mounting seals on a shaft or when inser- lows drive collar. For sliding velocities of vg < 25 m/s the ting seal cartridges in their housing, apply Points to note when using Statotherm® a thin coating of silicon grease or oil to the moulded rings (MFL WT80): Information Technical Use normal or soapy water (with a surfac- shaft or housing (N.B.: this does not Install moulded rings (Item 1 and 2) in tant) to mount elastomer bellows seals of apply to elastomer bellows seals). Never the dry state only and compress in axial the MG series on the shaft. Wet the seal allow EP rubber O-rings to come into con- direction only (radial deformation would seat and the shaft thoroughly and keep tact with mineral oil or grease. When result in their destruction). wet if the distance to slide the seal is ra- inserting stationary seats, be careful to Apply even pressure to insert the ther long. Never use oil or grease! After apply even pressure and use only water or moulded ring (Item 2) and the stationary completing the assembly, check that the alcohol to reduce O-ring friction. seat (Item 3) in the recess (concentricity rings, springs and seal face sit correctly tolerance!). and tight. concentricity tolerance of the seal cham- Tighten the screws (Item 4) in the ro- ber in relation to the shaft should not ex- tating part gradually and in circular suc- ceed 0.2 mm, and when pumping screws cession (not cross-wise) in several steps, are used it should not exceed 0.1 mm due keeping the gap as even as possible. to the effect of the pumping characteri- stic. If these values are exceeded please Venting contact Burgmann. To prevent damage to the sliding faces from dry running, the buffer space must be carefully vented after you have installed the seal. This is particularly important for those types of buffer fluid systems that do not vent themselves or are partially self venting (double seal with buffer fluid systems). Burgmann Mechanical Seals Design Manual 15.3 141 Technical Information TTV-O-Rings Conical springs Types of drive Viscosity Double PTFE-encapsulated O-rings of the When a conical spring is used for driving For a seal to function properly, the shaft Conversion table* type used in BURGMANN mechanical the seal (e.g. in standard types M2 and torque must be transmitted uniformly to The following conversion table shows the seals combine the elasticity of the core M3), the mechanical seal becomes the shaft sleeve and/or rotating parts un- kinematic viscosity n in terms of conven- materials (synthetic rubber) with the che- dependent on the direction of rota- der all operating conditions. Depending tional units of measurement at the same mical and thermal resistance of the PTFE. tion. Looking toward the sliding face of on the seal design it is necessary to make temperature. The material PTFE features good chemi- the rotating parts of the seal, shafts rotat- allowance for centrifugal and axial forces cal and thermal resistance, but it also dis- ing in clockwise direction require right- and in some case to observe special in- °E R.I SU hand springs and shafts rotating in anti- stallation instructions. Incorrect fitting mm2/s – sec sec clockwise direction require left-hand can cause, for example, jamming and de- -6 1.0 1.00 – – springs. Mounting the conical spring is formation of the seal. 1.5 1.06 – – easier if you twist it onto the shaft with a 2.0 1.12 30.4 32.6 screwing action in the same direction as Typical arrangements 2.5 1.17 31.5 34.4 the spring coiling. This screwing action 3.0 1.22 32.7 36.0 Coefficient of exp. 10 will cause the spring to open. For brief re- 3.5 1.26 34.0 37.6 versals of the direction of rotation we re- 4.0 1.31 35.3 39.1 Temperature 4.5 1.35 36.6 40.8 commend seal type “S30“. 5.0 1.39 38.0 42.4 plays a high degree of rigidity, a low coef- 5.5 1.44 39.3 44.0 ficient of thermal conductivity, an unfa- 6.0 1.48 40.6 45.6 vourable expansion characteristic (see Shrink disk Clamping set 6.5 1.52 42.0 47.2 Drive side graph) and a tendency to cold flow. It is (viewing direction) 7.0 1.57 43.3 48.8 advisable, therefore, to avoid the use of 7.5 1.61 44.7 50.4 O-rings made of solid PTFE. Direction of shaft 8.0 1.65 46.1 52.1 rotation: clockwise 8.5 1.70 47.5 53.8 The assembly position of double PTFE-en- 9.0 1.74 49.0 55.5 Direction of spring coiling: clockwise 9.5 1.79 50.4 57.2 Rounded edges Mounting: Push spring onto shaft and turn 10.0 1.83 51.9 58.9 simultaneously clockwise Set screw Set screw 11.0 1.93 54.9 62.4 with cone point with cup point 11.5 1.98 56.4 64.2 12.0 2.02 58.0 66.0 12.5 2.07 59.6 67.9 Left-hand spring Right-hand spring 13.0 2.12 61.2 69.8 Joint on outer teflon jacket facing 13.5 2.17 62.9 71.7 against directon of assembly 14.0 2.22 64.5 73.6 Mechanical seal anti- clock- 14.5 2.27 66.2 75.7 direction of assembly clockwise wise shaft shaft 15.0 2.33 67.8 77.4 15.5 2.38 69.5 79.3 Looking Allen set screw Drive key towards the 16.0 2.43 71.2 81.3 capsulated elastomers is critical. Care with full dog point mechanical seal 16.5 2.49 72.9 83.3 must be taken to ensure that the joint on 17.0 2.54 74.6 85.3 the outer jacket faces against the as- 17.5 2.59 76.3 87.4 sembly direction, as otherwise there is a Pressure vessel 18.0 2.65 78.1 89.4 risk of the jacket opening and being regulations 18.5 2.71 79.8 91.5 pulled off. 19.0 2.76 81.6 93.6 19.5 2.82 83.4 95.7 Bending of the jacket must be avoided at Requirements imposed by the all costs to prevent leaks. Slip TTV rings Conical spring Spring loaded 20.0 2.88 85.2 97.8 German Pressure Vessel Code 25.0 3.47 103.9 119.3 onto tubes for safe storage. drive pin on Group III pressure vessels 30.0 4.08 123.5 141.3 Shrink disk 35.0 4.71 143.4 163.7 (Section 8) 40.0 5.35 163.5 186.3 Section 4 of the German Pressure Ves- The pressure necessary for the transmis- 50.0 6.65 203.9 232.1 sel Code orders that pressure vessels be sion of torque is generated through 60.0 7.95 244.3 278.3 70.0 9.26 284.7 324.4 built and operated in accordance with the clamping force on lubricated conical sur- 80.0 10.58 325.1 370.8 generally valid rules of engineering (such faces. The shrink disk couplings can be 90.0 11.89 365.6 417.1 as the German AD Code). released at any time by slackening the 100.0 13.20 406.0 463.5 AD Bulletin W2 requires every pressu- tensioning screws. All the parts involved 150.0 19.80 609.0 695.2 re-bearing part made of austenitic steel to are subjected to elastic deformation only, 200.0 26.40 812.0 926.9 Screw locking be accompanied by a material certificate so the original clearance is restored once 250.0 33.00 1015.0 1158.7 DIN 50049 3.1 B or 3.1 C. the screws are released. 300.0 39.60 1218.0 1390.4 If no special provision is made for locking 350.0 46.20 1421.0 1622.1 The manufacturer must subject every Provided the conical surfaces are unda- 400.0 52.80 1624.0 1853.9 screw thread, use set screw with a suit- pressure vessel to a pressure test. maged, the shrink disks can be reten- able adhesive (e.g. Loctite) after remov- 500.0 66.00 2030.0 2317.4 Every pressure vessel must be issued sioned any number of times (ensure cor- 600.0 79.20 2436.0 2781.0 ing any grease. with a certificate confirming its correct rect lubrication). Shaft sleeves should not 700.0 92.40 2842.0 3244.5 production and pressure testing in accor- have a clearence diameter under the 800.0 105.60 3248.0 3708.0 dance with the Pressure Vessel Code. shrink disk and should make full contact 900.0 118.80 3654.0 4171.5 1000.0 132.00 4060.0 4635.0 This certificate is included with the with the shaft. delivery. Conventional units of measurement: °E = degrees Engler R = Redwood Seconds I and II SU = Saybolt Universal seconds * according to Ubbelohde mm2/s cSt 136142 Burgmann Mechanical Seals Design Manual 15.3 Research and Development Private "backroom" developments which subsequently become huge successes have become a rarity nowadays. The focus is firmly on finding and creating interdisciplinary solutions and meeting customer requirements, and the foundation for achieving these objectives lies in sound basic knowledge, a wealth of experience and, above all, the pos- sibility to convert ideas into reality - from the test phase right through to readiness for series production. We main- tain close collaboration in terms of research, development, experimentation and testing with our customers, suppliers, research institutes and university institutions to ensure suc- cessful completion of the tasks we are set. This also invol- ves converting the results of pure research into useful technology within the framework of publicly sponsored development projects. With 840 m2 of floor space, our Mechanical Seals R&D unit's new center contains a large number of test facilities designed to help meet the above objectives. The following data shows their extensive operational scope: • Shaft diameters up to 500 mm • Sliding velocities up to 200 m/s • Rotational speeds of up to 40,000 min–1 • Pressures from 0.01 to 400 bar • Temperatures up to 300 °C High-pressure test rigs for perfor- & Development Research mance-testing face materials High-speed test rig for small-diameter seals and clearance seals High-pressure test rig for high speed running seals, with separate control desk (photo at right) Burgmann Mechanical Seals Design Manual 15.3 143 R&D Design calculation Basic test stand for high speed running gas seals and segmental Comparative stress radial seals for turbocompressors and drive mechanisms MAK magnetic field lines Natural vibration of a Test stand for automotive mechanical seals metal bellows unit Pressure image in the sealing gap of a DGS Laboratory for chemico-physical analyses Gas film thickness in the sealing gap of a DGS The prerequisites for optimal functioning of mechanical seals include a dimensionally stable sealing gap. In many cases this View of the precision measu- means optimizing the form of seal components during the Test facility for qualifying mechanical seals ring room with its many test design phase in order to minimize deformation caused by pres- to API standard facilities through to photo and video documentation sure and temperature. To this end our design calculation engineers use the very latest finite element programs. Mathematical considerations are also called for where the opti- mal design of components for supply systems and accessories is concerned, e.g. heat exchangers, thermosiphon vessels or flow-related elements. Documented strength verification in line with the respective standards also has to be supplied for pres- sure vessels. The design calculation staff also update and look after the further development of the CASS Expert System for selecting mechanical seals. Measurement data printout 144 Burgmann Mechanical Seals Design Manual 15.3 Table of Materials Material code Description Material code Description Material code Description EN BURGMANN EN BURGMANN EN BURGMANN 1) 1) 1) 12756 12756 12756 Face Materials (Item 1/2) Metal Oxides (Ceramics) Non-Elastomers V Buke 5 Al-Oxide >99% G Statotherm® Pure graphite Synthetic Carbons V2 Buke 3 Al-Oxide >96% T T PTFE (Polytetrafluorethylene) A Buko 03 Carbon graphite, antimony impreg. X Buke 8 Steatite (Magnesia silicate) T2 T2 PTFE, glassfibre reinforced B Buko 1 Carbon graphite, resin impreg. T3 T3 PTFE, carbon reinforcedt Plastics T12 T12 PTFE, carbon-graphite reinforced approved for foodstuffs ® B3 Buko 02 Carbon graphite, resin impreg. Y1 Buku 2 PTFE, glassfibre reinforced Y1 Burasil -U Static seal, non-asbestos Y Buku 3 PTFE, carbon reinforced B5 Buko 34 Carbon, resin bonded 2 Spring and Construction Mat. (Item 4/5) C Buko 22 Electrographite, antimony impreg. Metalle Secondary Seal Components (Item 3) Spring Materials E Bume 20 Cr-Steel G 1.4571 CrNiMo-steel G Bume 17 CrNiMo-Steel Elastomers, not wrapped M Hast. C4 Hastelloy® C-4 (2.4610) S Bume 5 Special cast CrMo-Steel B B Butyl rubber (IIR2)) Nickel-base alloy T41 Bube 281 1.4462 DLC-coated E E Ethylene propylene rubber (EPDM2)), e.g. Nordel® Construction Materials Carbides K K Perfluorocarbon rubber (FFKM2)), D St C-steel U =Tungsten carbides e.g. Kalrez® Chemraz®, Simriz® E 1.4122 Cr-steel N N Chloroprene rubber (CR2) F 1.4301 CrNi-steel U1 Buka 1 brazed Tungsten carbide, Co-binder e.g. Neopren® F 1.4308 CrNi-cast steel U2 Buka 16 solid Tungsten carbide, Ni-binder P P Nitrile-butadiene-rubber (NBR2)) F 1.4313 special CrNi-cast steel U22 Buka 16 shrunk-in Tungsten carbide, Ni-binder 1 e.g. Perbunan® G 1.4401 CrNiMo-steel U3 Buka 15 solid Tungsten carbide, NiCrMo-binder S S Silicone rubber (MVQ2)), G 1.4571 CrNiMo-steel U37 Buka 15 shrunk-in Tungsten carbide, NiCrMo-binder U Buka 17 solid Tungsten carbide, binder-free e.g. Silopren® G 1.4581 CrNiMo-cast steel 7 2) ® V V Fluorcarbon rubber (FKM ), e.g.Viton G1 1.4462 CrNiMo-steel Q = Silicon carbides G2 1.4439 CrNiMo-steel Elastomers, wrapped G 1.4539 NiCrMo-steel Q1 Buka 22 solid SiC, silicon carbide, sintered 3 pressureless M1 TTV FKM, double PTF wrapped M = Nickel-base alloy M Hast. C4 Hastelloy® C-4 (2.4610) Q12 Buka 22 shrunk-in SiC, sintered pressureless M2 TTE EPDM, double PTF wrapped M Hast. B2 Hastelloy® B-2 (2.4617) Q2 Buka 20 solid SiC-Si, reaction bonded M3 TTS MVQ, double PTFE wrapped 1 M Carp. Carpenter® 20 Cb3 (2.4660) Q22 Buka 20 shrunk-in SiC-Si, reaction bonded M4 TTN CR, double PTF wrapped 3 M Monel K500 Monel® alloy K500 (2.4375) Q3 Buka 30 solid SiC-C-Si, carbon silicon impr. M5 FEP FKM, FEP-wrapped 4 M Hast. C-276 Hastelloy® C-276 (2.4819) Q32 Buka 30 shrunk-in SiC-C-Si, carbon silicon impr. M7 TTV/T FKM, double PTFE wrapped/ 5 M Incon. 718 Inconel® 718 (2.4819) Q4 Buka 24 solid C-SiC, carbon surface silicated PTFE, solid 6 T = Other materials Q19 Buka 221 SiC, DLC-coated Differing Materials T1 1.4505 CrNiMoCuNb-steel U K/T Perfluorocarbon rubber/PTFE T2 Titan Pure titanium (3.7035) 1 ® Preferred materials T3 Incon. 625 Inconel 625 (2.4856) ® 1) Standard following EN 12756, Dec. 2000 T4 Carp. 42 Carpenter 42 (1.3917) ® 2) Shortway acc. to ISO 1629, Nov. 2004 T5 Incon. 800 Incoloy 800 (1.4876) Legend for seal selection by media (starting page 3) Notes on the medium (2) D = Dual mechanical seal Mechanical seal type 2 = Corrosion Melting point (14) D1 = Back-to-back on product side (8) 3 = Exclusion of air G = Mixture/group K.. .= Efflorescence D2 = Tandem 4 = Lubricating properties N = Natural product temperature D3 = Face-to-face 1 = With elastomer 5 = Icing risk ® = Trade mark S... = Sublimation temperature Q = Quench O-rings, rotating 6 = Leakage S = Collective term ...% = Values for ...% Q1 = Without throttle bushing springs in contact 7 = Readily flammable V = Impurities aqueous solution Q2 = With throttle bushing with the product 8 = Flame-promoting 2 = same as 1 but springs Concentration (3) Q3 = With auxiliary seal 9 = Potentially explosive Boiling point (15) not in contact with 0 = Insufficient information – = “any“ Auxiliary piping (6) the product A... = Boiling point of the < 10 = less than 10 weigth % 3 = same as 2 but azeotrope 00 = None (“dead end“) TLV (11) ϳ10 = approx. 10% stationary springs Z = Decomposition 01 = Internal circulation a fig. = TLV in ppm F10 = Solids up to 10% 4 = same as 2 but metal- temperature 02 = Connection from mg = TLV in mg/m3 L = Defined solution free on product side (...) = Reference pressure = pump case # = mg/m3 of base substance < L = Unsaturated solution 5 = with elastomer bellows in mbar 08 = Supply of external fluid * = No TLV because it is > L = Supersaturated sol. 6 = with metal bellows ...% = Values for ...% 08a = Flushing dearly carcinogenic Sch = Melt X = special design aqueous solution 08b = Quench (static) Sus = Suspension Normal cond. (12) 09 = Throughflowing Density (g/cm3) (16) = quench or buffer fluid ga = Gaseous Temperature (4) Material selection (9) (+) = Heavier then air 10 = Circulating quench fe = Solid < 100 = less than 100 °C For designations acc. to EN 12756 (–) = Lighter than air = or buffer fluid, fl = Liquid > F = > Solidifying temp. see table of materials. (...) = Reference temp. in °C = pressureless kr = Crystalline > K = > Crystallization A... = Density of the azeotrope 11 = Same as 10, but pa = Viscous > temperature at ...% = pressurized Health hazard warnings (10) < Kp = < Boiling temperature 12 = Pressure transmitter ...% = Values for ...% > Pp = > Pour point A = Corrosive aqueous solution TG = < Material tempera- Auxiliary measures (7) C = Carcinogenic > ture limit Solubility in water (13) D = Steam quench C1 = Proven in humans C2 = Proven in animal (...) = Deviating reference temperature Arrangem. of shaft seal (5) (H), H = Heating (if necessary) kD = Conical stuffing box experiments – = Solubility decrease with rising temperature S = Single mechanical seal SS = Splash guard C3 = Suspected for good ++ = Solubility increases greatly with rise in temperature S1 = Internal arrangement SW = Replacement of reason sll = Soluble in less than 1 part water S2 = External arrangement = buffer medium G = Toxic ll = Soluble in 1 – 10 parts water S3 = Internal arrangement QW = Replacement of H = Skin resorption l = Soluble in 10 – 30 parts water = with rotating counter = quench medium R = Irritant wl = Soluble in 30 – 100 parts water = ring ThE = Thermal buffer S = Sensitization sl = Soluble in 100 – 1 000 parts water X = Moderately toxic ssl = Soluble in 1 000 – 10 000 parts water 1 = Vapour pressure/gas unl = Soluble in more than 10 000 parts water Burgmann in Profile ISO 14001 QHD Qualified Hygienic Design VDMA DIN/EN 729-2 HPO Certified KTA 1401 Certified for Nuclear Power Plants Quality Management System QS 9000 VDA 6.1 Certified WHG Fachbetrieb (§ 19) Germanischer Lloyd Approvals IHK Prüfungsbetrieb BURGMANN is international BURGMANN is customer proximity With 16 sales offices in Germany, more Under the motto "Closer to our custo- than 50 subsidiaries and joint ventures on mers" we are constantly expanding our all continents, and 3,100 employees international sales and customer service Burgmann Industries GmbH & Co. KG are network. This is reflected in the over 90 one of the leading seal manufacturers. well-equipped, highly competent and effi- With effect of March 2004 the company cient Service Centers at the service of our with head offices in Wolfratshausen is customers worldwide. one of ten independent operative Business Groups in the Freudenberg BURGMANN in the future group, Weinheim/Germany. Our development from a small family-run business into a company the size it is BURGMANN is quality today is the result of far-sighted research As one of Europe’s very first seal manu- and development and, not least of all, an facturers to do so, Burgmann set up an excellent team of employees. This is why independent quality assurance system the training of young people is a priority which is recognized by many internatio- mission at Burgmann to make sure that nal organizations and has contributed sig- nothing is left to chance in the future eit- nificantly to the company’s global suc- her. cess. Burgmann products guarantee the very highest standards in terms of safety, efficiency and reliability and are employ- ed in virtually all sectors of industry. BURGMANN and environmental protection Environmental protection has always played a key role in corporate policy at Burgmann. True to our governing princi- ple “Leakproof for a clean environment“, we aim to be leaders in terms of in-plant environmental protection as well. Burgmann Dichtungswerke BURGMANN GmbH & Co. KG Mechanical Seals Aeussere Sauerlacher Str. 6-10 D-82515 Wolfratshausen Design Manual Tel. +49 / 81 71 / 23-0 Fax +49 / 81 71 / 2 31 21 4 www.burgmann.com KM15E/E6/10.000/03.05/7.2.1 15.3 e-mail: info@burgmann com Photos: ABS, Aerzener Maschinenfabrik, Ahlström, Allweiler, Amoco, Andritz, Atlas Copco, BASF, Bornemann, Burgmann, Byron Jackson, CCM Sulzer, Delaval Stork, Demag, Deutsche Vakuumapparatebau, Drais, EDF, Egger, Eickhoff, Ensival, Escher Wyss, Frank Mohn, Frings, Fristam, Habermann, Halberg, Harrislee, Herborner Pumpenfabrik, Hilge, Hoesch, Holtzmann, HOMA, Hydro, Ingersoll Rand, Jung, Klaus Union, KSB, Quadt Troisdorf, Kværner Fjellstrand, Lamort, Lederle, Leistritz, Lowara Deutschland, Lurgi, MAN GHH, Mannesmann Demag, Netzsch, Norsk Hydro, Nuovo Pignone, ORPU, Paurat, Pleuger, PRG, Rheinbraun, Ritz, Schenk, Schering, Schulte, Seeberger, SIHI-Halberg, Statoil, Steimel, Sulzer Turbo, Sulzer Weise, UK-Wesseling, Valmet, VEBA, Voith Sulzer, Vollrath, Weller, Wintershall, Worthington. Printed in the Federal Republic of Germany. First manufacturer of mechanical seals to be certified by the DQS in accordance with ISO 9001 Reg. Nr. 24015.