... oil, ozone, weather, aging, refrigeration and chemical resistance, according to customer's requirements (eg. Tensile strength, elongation, compression set, ... valve: Our rubber diaphragm valve are custom designed and engineered to operate for specific pressure and pressure changes, mechanical requirements, ... VITON),ACM,AEM,SBR,CR,PU etcHardness:30~90 Shore A Size Standard:AS/BS/JIS B /ISO /DIN/GB ...