Viton® is a brand of synthetic rubber and fluoropolymer elastomer commonly used in O-rings and other Molded or extruded goods. The name is trademarked by * DuPont Performance Elastomers L.L.C..
Viton fluoroelastomers are categorized under the ASTM D1418 & ISO 1629 designation of FKM. This class of elastomers is a family comprising copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2), terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF) and hexafluoropropylene (HFP) as well as perfluoromethylvinylether (PMVE) containing specialties. The fluorine content of the most common Viton grades varies between 66 and 70%. |
The terms FPM, FKM and Viton® very often cause confusion and lead to incorrect interpretations. All of these designations actually stand for one single base material:fluoro rubber.
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FPM is the international abbreviation according to DIN/ISO, whereas
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FKM is the short form for the fluoroelastomer category according to the American standard ASTM.
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Viton® is the registered trade mark of DuPont Performance Elastomers
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