TheThe UltimateUltimate TOP-ENTRYTOP-ENTRY BALLBALL VALVEVALVE RESILIENT AND METAL-SEATED ASME CLASS 150, 300, 600 3 Sizes ⁄8–6”, 10–150 mm Catalogs PROFILE Velan is one of the world's leading manufacturers of industrial valves, supplying forged and cast steel gate, globe, check, ball, CONTENTS butterfly and knife gate valves for critical applications in the Manufacturing Plants ......................................................... 1 chemical, petrochemical, oil and gas, fossil and nuclear power, Design Technology ......................................................... cogeneration, pulp and paper and cryogenic industries. 2– 4 Alternative Stem & Packing Chamber Designs .............. 5 Founded in 1950, Velan earned a reputation for excellence as Resilient Seated Valves ................................................. 6–7 a major supplier of forged valves for nuclear power plants and Special Services .............................................................. 8–9 the U.S. Navy. Velan Inc., pioneered many designs which Metal-Seated Valves.................................................... became industry standards, including bellows seal valves, all 10–11 stainless steel knife gate valves and forged valves up to 24". Dimensions ................................................................... 12–13 Seat Material Selection .................................................... 13 Velan valves are manufactured in 12 specialized plants, Manual Gear Actuators & Actuator Torque................... 14 including five in Canada, two in Korea and one each in the Stem Packing Design for Automation and Control........ U.S., France, U.K., Portugal and Taiwan. We have a total of 15 1,091 employees in North America and 384 overseas. How to Order ................................................................. 16–17 Top-entry, TE-600 ball valves are manufactured in plant 5 Montreal, Canada. Velan has Sales offices and distributors located worldwide. Visit the Velan website at www.velan.com for an updated contact list. NOTE: The material in this catalog is for general information. For specific performance data and proper material selection, consult your Velan representative. Although every attempt has been made to ensure that the information contained in this catalog is correct, Velan reserves the right to change designs, materials or specifications without notice. VELAN MEMORY SEAL BALL VALVE TECHNOLOGY Velan concave-convex flexible “in-tension” seats with induced sealing memory U.S. PATENT 3,384,341 D1 D2 AREA IN AREA BEFORE ASSEMBLY AFTER ASSEMBLY COMPRESSION IN-TENSION SEALING MEMORY LOWER TORQUES The Velan sealing memory is induced into the seats Velan “in-tension” seats produce more uniform during the assembly process. When the ball is torque because the seat deflects into the cavity inserted into the valve body during assembly, it behind it to accommodate slight differences in partially flattens the seat, creating a tensile stress in machining tolerances or the normal expansion of the center of the seat. PTFE as temperature increases. PTFE expands As a result, the seat core increases in diameter approximately seven times as much as metal. from D1 to D2 and like a stretched elastic band pushes against the ball. This ensures reliable sealing even at vacuum or low pressures. SUMMARY OF MEMORY SEAT STRENGTH A seat in tension is stronger than a seat in SEAL BENEFITS compression because the tensile strength of PTFE in tension is 3600 psi versus only 1800 psi for PTFE G SEATS ”IN-TENSION“ in compression. Greater strength means less fatigue, - Greater strength superior sealing ability and longer cycle life. - Less fatigue CAVITY PRESSURE RELIEF - Positive bi-directional shutoff Memory seal seats are designed to relieve - Compensate for temperature fluctuations overpressure in the ball/body cavity. This capability is influenced by many variables including: fluid - Uniform torque characteristics, variations in pressure, seat - High cycle life materials, seat compression, temperature and thermal cycles. - Eliminate cold flow effects Positive release of cavity overpressure to the upstream side is assured in bypassing the upstream seat through a drilled hole in the ball. This option is preferred in certain services such as liquid chlorine. G LARGER SEATING AREA - Superior sealing For specific details on Cavity Relief Performance contact Velan. 2 VELAN TOP-ENTRY BALL VALVES SUPERIOR TO THREE-PIECE BALL VALVES VELAN FIRE SAFE TOP-ENTRY THREE-PIECE FIRE SAFE VALVES 1 Two-leakage paths (gasket and packing). 1 Three-leakage paths (2 gaskets and packing). 2 Fully guided stem. 2 Stem can wobble, cause leakage. 3 In lab tests 0 ppm emissions to 100,000 cycles, 3 Larger emissions, lower cycle life. 500,000 with live-loading. 4 Welding can affect the integrity of the valve 4 Easy to weld the one-piece body into the line due to tendency to separate the three-bolted without disassembly. The integrity of the valve is body parts during the welding. not affected. 5 Valve can not be serviced in-line, because of the 5 All parts can be easily serviced or replaced in-line. fire safe design with spiral wound gaskets which requires internal guiding of the two end pieces. The guiding prevents the centerpiece to swing out. IN-LINE SERVICE STEP 1 STEP 3 Remove Remove seats. cover Once ball is out, assembly. a simple jolt with fingers or tool STEP 2 removes seat. Remove ball. Turn ball 90° and remove. 3 A UNIQUE PACKING CHAMBER WITH A FULLY GUIDED STEM AND FLANGED PACKING GLAND TESTED FOR 0 PPM EMISSIONS 1. Fully-guided stem. Stem bearings in cover and in the gland follower prevent wobbling and packing leakage 6. Antistatic devices. due to side thrust on stem. 1. 2. The stem is grounded against 2. Two piece flanged body by contact with Belleville gland design washers or coil springs. for low fugitive emissions and 7. Optional Live-loading. severe service applications. For temperature cycling 3. Low emission stem seal. applications and/or for Precompressed (2000 psi) conformance to TA-Luft, solid PTFE packing rings, additional steady compression a two-piece flanged gland load can be provided by and fine finish of stem and installing sets of Belleville I.D. of packing chamber washers. provides 0-20 ppm tightness for low emissions. 4. Stem thrust washer prevents galling, reduces operating torque and provides a secondary stem seal. 5. Blowout-proof. The internally-backseated stem provides blowout-proof safety. VELAN NOW OFFERS STANDARD BALL VALVES QUALIFICATION TESTED FOR “0” PPM EMISSIONS TEST PROCEDURE The purpose of cycle testing was to determine cycle life for 0 ppm tightness of stem seal and body gasket with propane at 115 psi, 740 psi and 1400 psi. The testing consists of: G Precycling evaluation. G Gland and body gasket emissions measured every 500 cycles. G Tested to 100,000 cycles; 500,000 cycles with live-loaded packing. TEST RESULTS 0 ppm tightness during tests shown on the right. Definition of 0 ppm is no detectable leakage registered on our organic vapor analyzer which has a range of 1–10,000 ppm. Top-entry, TE-600 with live-loading cycled for 500,000 with 0 ppm emissions. 4 ALTERNATIVE STEM & PACKING CHAMBER DESIGNS LIVE-LOADING DOUBLE PACKED G Double packing with leak-off. Two sets of packing rings, precompressed to 2,000 psi (PTFE) or 4,000 psi (graphite). A lantern ring and leak-off allow removal of leakage, if any, from bottom packing set. G Live-loaded. Tested to 500,000 cycles with “0” ppm emissions. EXTENDED BONNET G Designed for insulated and steam jacketed lines where access to packing is required. G Optional side mounting holes for actuation. G Primary graphite packing for high-temperature service. G Secondary packing is isolated from the process. G Standard locking device. BELLOWS SEAL Hermetically sealed. G Bellows in Hastelloy C. G Secondary PTFE or graphite packing seal. G A unique bellows seal design tested to 100,000 cycles with stainless steel driver unit allows installation of standard, pneumatic or electric actuator. 5 TE-150/300/600 TOP-ENTRY REGULAR OR FULL PORT MEMORY SEAL BALL VALVES CARBON OR STAINLESS STEEL AND OTHER MATERIALS 1 3 REGULAR PORT ⁄2– 6" (15–150 mm) FULL PORT ⁄8 –6" (10–150 mm), THREADED, SOCKET WELD, BUTT WELD OR FLANGED, CLASSES 150, 300, 600 LOW FUGITIVE EMISSIONS Socket weld & threaded 3/8– 4” (10–100 mm) Buttweld 1/2– 4” (15–100 mm) Flanged 1/2– 6” (15–150 mm) DESIGN FEATURES: G Memory seal seats compensate automatically for G Locking devices standard. wear and fluctuations of pressure and temperature. G Tapping for mounting actuators standard. G Multiple solid cup and cone type PTFE or G graphite packing – adjustable. AGA and CGA approved, regular port, threaded ends. (upon request) G Stem bearings in cover and gland bushing G eliminate side thrust. No wobbling. Valves comply with Nace MR0175 for sour gas service when required (refer to page 11). G Longer cycle life. G Optional topworks (page 5): G Lower torques. 1. Live-loaded single or double packing. Blowout-proof stem. 2. TA-Luft certified when supplied with PTFE G Live-loaded thrust washer prevents galling and live-loading packing. provides a secondary stem seal. 3. Bellows seal design. G Meets ASME B16.5 and B16.34, API 608, 598, 607 and BS 6755. NOTE: G High sealing integrity of body-cover joint due to FIRE SAFE to BS 6755 part 2 for standard valves and API 607 Rev. 4 for valves with graphite packing (Spiral wound fully-enclosed spiral wound graphite gasket design. graphite/SS 316 gasket standard). G Permits in-line access for seat replacement. G Flanged gland. G Body-cover joint not affected by pipe stresses. APPLICATIONS: G Wall thickness complies with ASME B16.34. A superior quality, rugged, and universal purpose G Can be welded into line without disassembly valve for all fluids, slurries, semi-solids and in accordance with Velan installation instructions. corrosive services in endless industrial, chemical and original equipment applications. G Stainless steel trim on all valves including handle. G G Oval handles with locking device, as well as Dimensions and weights on page 12 and 13. extensions available.