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Viton® - The gaskets are made using fluoroelastomer materials and actually refer to the same products sold by DuPont Company. It is a commonly used name which refers to the product FKM and is used for Industrrial, Chemical and relatively high temperature gasket materials.
FKM materials (Viton® is a trademark) are often used in industrial pipe flanges, seals, o-rings, molded rubber parts, manway, and hand hole gaskets throughout industry. Because FKM / Viton® is good for temperatures to 400 F it is used in many high heat applications. It's also great for a very wide range of applications. Viton® also comes in multiple grades. The biggest factor in the variance of Viton® grades is the flourene content and cure method. FFKM commonly known as Kalrez is actually a high flourene content FKM material, that covers an even wider range of chemical ranges. The common grades are shown in the chart below. Viton® resists aliphalactic aromatic and halogenated hydrocarbons, concentrated acids, alkalis, animal and vegetable oils. Restrictions:
Restrictions :
Viton® is not well resistant to ketones. Low molecular weight esters (such as ethyl acetate), or nitro containing compounds are poorly compatible with Viton. FKM is not recommended for temperatures below -15 degrees F.
High Temperature specifications: Limit: 350 F (constant) 400 F (intermittent). The Pressure Limitation of 800 lbs. @ 400 F. Based on a Durometer Hardness: of 72.
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