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............. <br /> NATIO <br /> D <br /> BOARD Materials Compatibility <br /> el'unda O-Ring Chemical Compatibility <br /> Gullde4 <br /> O-Ring Com pqfib'flities <br /> Compound <br /> Compatibility <br /> Elastomer Rating <br /> Aflas. 0 <br /> Chemraz 4 <br /> Fluorocarbon 4 <br /> Kalrez 0 <br /> Nitrile, Hydrogenated I <br /> Polyurethane, Cast 0 <br /> Styrene-Butadiene SBR I <br /> Buna-N (Nitrile) I <br /> Epichlorohyrin 0 <br /> Fluorosilicone 3 <br /> Natural Rubber I <br /> Polyacrylate 0 <br /> Polyurethane, Millable 0 <br /> Teflon, Virgin 4 <br /> Butyl 3 <br /> Ethylene-Propylene 3 <br /> Hypalon 1 <br /> Neoprene I <br /> Polysulfide 0 <br /> Silicone 0 <br /> VaMac 0 <br /> Compatibility Ratings: <br /> 4-Good, both for static and dynamic seals <br /> 3- Fair, usually OK for static seals <br /> 2-Sometimes OK for static seals; not OK for <br /> dynamic seals <br /> 1 - Poor <br /> 0- No Data <br /> 4 O-Ring Chemical Compatibility Guide, <br /> eFunda, Inc. Sunnydale, CA, 2004. <br /> www.efunda,com. <br /> 4 <br />