Worldwide supply chain disruptions have led to a shortage of perfluoroelastomer (FFKM) seal materials. In response, the technical engineering team at Total Valve Systems has created a proprietary range of FFKM (compare to Kalrez®) and FEPM (compare to Aflas®) O-rings designed for challenging valve applications. Our materials meet or exceed the specs of the market leading compounds and our O-rings are manufactured in our hometown of Broken Arrow, Oklahoma.