Viton® O rings have excellent chemical resistance and can be used at temperature range of between 15°C and 200°C. Although generally more expensive than NBR (Nitrile) O-rings, FKM has found wide acceptance in the aircraft, automotive and chemical industries. The terms FPM, FKM and Viton® can lead to incorrect interpretations. These designations stand for one single base material: fluorocarbon rubber. Polymax is also able to supply specially compounded FKM O rings meeting Norsok M710, FDA, USP Class VI, UL94 V0, EN549, Viton®A, B, G, GF, GLT, GFLT, ETP standards on special request. Please contact us for further information.