The difference between FKM and FPM: In fact, they are both abbreviations of fluororubber, but FKM is the abbreviation of Europe and FPM is the abbreviation of American spelling. FKM was originally produced by DuPont in 1956 with the trademark VITON. Because DuPont's reputation is too high, in many people's words, fluororubber is FKM, which makes no difference. It can be said that even in some drawings, it is indicated as fluororubber, but DuPont's fluororubber is not necessarily specified, that is to say, this material is FKM. So we all hope to adopt it.