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Chemical Compatibility Guide 45678 Chemical Compatibility Guide Guide Chemical Compatibility Elastomeric Compounds Chemical Compatibility Guide HIGH-PERFORMANCE MATERIALS APPLYING THE COMPATIBILITY GUIDE Greene, Tweed offers customized-engineered components that optimize The ratings contained in this guide (see chart on the next pages) the total system. We have 100 years of experience developing high- are based on existing published data, laboratory soak tests and performance materials for a range of industries, from medical, informed decisions on the part of Greene, Tweed personnel. Most aerospace and defense, to fluid handling, oilfield and semiconductor. ratings are based on ambient temperature, low pressure and 100 We currently manufacture more than 300 unique elastomeric percent concentrations. Exposure conditions differing from stated compounds and over 300 plastic production compounds from eight conditions could affect these ratings. distinct plastic families. It is important to recognize real world differences when applying Greene, Tweed formulates a variety of compounds to meet specific laboratory and empirical information to actual field situations. Soak characteristics such as durometer, modulus, compression set, tests usually employ full immersion of the test sample, in a pure temperature, fluid compatibility, etc. Because we believe in fluid, at room temperature, without pressure or other stresses. In collaborating with customers to match the specific needs of their actual service, however, the seal is likely to experience a mixture of applications, we can customize one of our many compounds to fluids, be exposed only on one edge, be compressed in a sealing extend the performance of any process. Our engineers work side by gland and/or be subjected to process pressure, elevated tempera- side with customers to design the best solution for each individual tures and possibly abrasive particles. When stressed in these ways, application. the fluid attack on an elastomeric seal is almost always aggravated. Greene, Tweed partners with customers to provide reliable, efficient Many other factors can come into play to affect seal performance in answers to their application needs. With offices in the Americas, actual field conditions. Some elastomer compounds shrink instead Europe and Asia, our customers can receive technical support from of swell in certain fluids. This phenomenon, coupled with high people who speak the same language. As a world-class leader in compression set, can result in seal leakage following thermal or the design and manufacture of high-performance materials and pressure cycling. Seals behave differently in dynamic applications customized-engineered components, we leverage our expertise in than in static conditions. Replacing one elastomeric seal of a given a variety of markets and products to give our customers the most size with another seal of the same size made from a different innovative and cost-effective solutions to their demanding applica- elastomer may not be successful because of differences in their tions. To learn more about what the Inside Advantage can offer physical properties rather than simply their fluid compatibility. you, visit our website at www.gtweed.com. Greene, Tweed offers a broad range of elastomer compounds. This booklet is only a general guide. It cannot account for differences OVERVIEW in the plasticizers, fillers or curatives existing between different compounds of the same elastomer. Specific recommendations can Selecting the right elastomer and seal design to optimize system only be made when the design and exposure conditions are provided performance is a challenging task. This compatibility guide addresses for consideration by experienced seal engineers. only one aspect of the challenge—the ability of the seal material to resist the contacting fluid. Greene, Tweed offers all of the elastomeric The suitability of all seals and seal materials should always be tested. materials shown in this guide to meet your needs. Greene, Tweed encourages such testing and will provide test specimens to facilitate this. The most chemically resistant of these materials is Chemraz®, a perfluoroelastomer combining the broad, almost universal chemical resistance of PTFE with the resilience of elastomers. When coupled CAUTION with precision seal design, Chemraz components represent the ultimate in elastomeric seals. Fluorinated products (i.e., Fluoraz®, Fluorosilicone and Chemraz®) should not be exposed to molten or gaseous alkali metals such However, when faced with the relatively high initial cost of such as potassium or sodium, since an extremely exothermic reaction seals, the design engineer usually conducts a “cost to use” versus may occur. “price to purchase” review to establish value in use. Our design experts are available to assist in choosing the right elastomer for each unique application. Simply fill in the information on the engineering form (page 71) and fax it to us. www.gtweed.com 2 Chemical Compatibility Guide COMPARISON OF PROPERTIES OF GENERIC ELASTOMERS r e m e sto n la le e y ro p o P ro F /P H rflu E 2 e F F HydrogenatedNitrile CHEMRAZ®P FLUORAZ®T FluoroelastomerV EthylenePropylene Nitrile Epichlorohydrin Neoprene Polyurethane Silicone Fluorosilicone Properties FFKM FEPM FKM EPDM NBR ECO HNBR CR AU SI FSI Abrasion Resistance P G G GE G G G G E P P Acid Resistance E E E G F FG E FG P FG FG Chemical Resistance E E E E FG G FG FG F GE E Cold Resistance FP P FP GE G GE G FG G E GE Electrical Properties E F F G F F F F FG E E Flame Resistance E E E P P FG P G P F G Heat Resistance E E E E G F E G P E E Impermeability G G G G G GE G G G P P Oil Resistance E E E P E E E FG G PG G Ozone Resistance E E E E P E G GE E E E Set Resistance G G GE GE GE PF GE F F GE GE Tear Resistance FP F F GE FG G FG FG GE P P Tensile Strength FG GE GE GE GE G E G E P F Water/Steam Resistance E/F E FG E FG F E F P F F Weather Resistance E E E E F E G E E E E P = Poor • F = Fair • G = Good • E = Excellent ELASTOMER TEMPERATURE RANGE ELASTOMER TEMPERATURE RANGE Epichlorohydrin -54°C to 121°C (-65°F to 250°F) Fluorosilicone -73°C to 204°C (-100° to 400°F) Urethane -54°C to 107°C (-65°F to 225°F) Silicone -101°C to 260°C (-150°F to 500°F) Neoprene -54°C to 121°C (-65°F to 250°F) FKM Fluorocarbon -40°C to 232°C (-40°F to 450°F) Nitrile -59°C to 121°C (-75°F to 250°F) Fluoraz Fluorocarbon 0°C to 260°C (32°F to 500°F) Hydrogenated Nitrile -40°C to 177°C (-40°F to 350°F) Chemraz Perfluoroelastomer -30°C to 316°C (-22°F to 600°F) Ethylene Propylene -54°C to 149°C (-65°F to 300°F) RATING SCALE 1. Excellent; recommended for both static and dynamic services. 3. Limited resistance; might work under certain conditions. 2. Good resistance; usually satisfactory in static applications, might 4. Not recommended for service. work in dynamic applications. N/A No rating due to insufficient data. 3 www.gtweed.com Black Black White Cream Black 615 A 505, 504, 526*, 605, 514, 517, 584, 585, CHEMRAZ® compound: (High Temperature) 510 600, SD625 SD517 SD585 Media -22°F<T<300°F 300°F<T<446°F -4°F<T<300°F 300°F<T<500°F 0°F<T<150°F 150°F<T<300°F 300°F<T<425°F 425°F<T<615°F -22°F<T<300°F 300°F<T<428°F -22°F<T<300°F 300°F<T<428°F -30°C<T<149°C 149°C<T<230°C -20°C<T<149°C 149°C<T<260°C -18°C<T<66°C 66°C<T<149°C 149°C<T<218°C 218°C<T<324°C -30°C<T<149°C 149°C<T<220°C -30°C<T<149°C 149°C<T<220°C Notes Abietic Acid 1 1 1 1 1 1 1 1 1 1 1 1 Acetaldehyde 1 1 1 1 1 1 2 3 2 3 116 Acetamide 1 1 1 1 1 2 2 3 - 4 11118 Acetanilide 1 1 1 1 1 1 1 1 1 1 1 1 Acetic Acid, 30% 1 1 1 1 1 1 1 1 2 2 1 1 3, 17 Acetic Acid, Glacial 1 1 1 1 1 1 1 1 2 2 1 1 17 Acetic Anhydride 1 1 1 1 1 1 1 1 2 2 1 1 Aceto Cyanohydrin 1 1 1 1 1 1 1 1 1 1 1 1 Acetoacetic Acid (Acetyl Acetic Acid) 1 1 1 1 1 1 1 1 1 1 1 1 Acetone (Dimethylketone, Propanone) 1 1 1 1 1 1 1 1 1 1 1 1 Acetonitrile (Methyl Cyanide) 1 1 1 1 1 1 1 1 1 1 1 1 Acetophenetidin 1 1 1 1 1 1 1 1 1 1 1 1 Acetophenone (Methyl Phenyl Ketone) 1 1 1 1 1 1 1 1 1 1 1 1 Acetotoluidine 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Acetic Ester 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Acetone 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Benzene (Acetyl Phenone) 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Bromide 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Chloride 1 1 1 1 1 1 1 1 1 1 1 1 Acetyl Nitrate 1 1 1 1 1 1 1 1 1 1 1 1 Acetylene 1 1 1 1 1 1 1 1 1 1 1 1 12 Acetylene Tetrabromide 1 1 1 1 1 1 1 1 1 1 1 1 Acetylene Tetrachloride 1 1 1 1 1 1 1 1 1 1 1 1 Acetylsalicylic Acid 1 1 1 1 1 1 1 1 1 1 1 1 Aconitic Acid 1 1 1 1 1 1 1 1 2 2 1 1 12, 17 Acridine 1 1 1 1 1 1 1 1 2 2 1 1 12 Acrolein (Acrylaldehyde, Allylaldehyde) 1 1 1 1 1 1 2 3 2 3 11 Acrylaldehyde (Allylaldehyde, Acrolein) 1 1 1 1 1 1 2 3 2 3 11 Acrylic Acid 1 1 1 1 1 1 1 1 2 2 1 1 12, 17 Acrylonitrile 1 1 1 1 2 2 2 2 1 1 1 1 6 Adipic Acid 1 1 1 1 1 1 1 1 1 1 1 1 Aero Lubriplate 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aerosafe 2300 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aerosafe 2300W 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aeroshell 17, Grease 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aeroshell 750 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aeroshell 1AC, Grease 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aeroshell 7A, Grease 1 1 1 1 N/A N/A N/A N/A 1 1 1 1 Aerozene 50 (50% Hydrazine, 50% UDMH) 2 2 2 2 2 2 2 2 2 2 2 2 Air 1111 11111111 Alcohol, Denaturated 1 1 1 1 1 1 1 1 1 1 1 1 Alkane (Paraffin) 1 1 1 1 1 1 1 1 1 1 1 1 Alkanesulfonic Acid 1 1 1 1 1 1 1 1 1 1 1 1 Alkazene 1 1 1 1 1 1 1 1 1 1 1 1 Alkene (Olefin) 1 1 1 1 1 1 1 1 1 1 1 1 Alkyl Acetone 1 1 1 1 1 1 1 1 1 1 1 1 Alkyl Alcohol 1 1 1 1 1 1 1 1 1 1 1 1 Alkyl Amine 1 1 1 1 2 4 4 4 12128 Alkyl Benzene 1 1 1 1 1 1 1 1 1 1 1 1 Alkyl Bromide
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