FPM 75 Shore A

FKM - Fluor rubber (resistant to temperatures up to +200 °C/ +392 °F)

O rings, also known as rubber rings and sealing rings are the most frequently used type of seal. It is due to the fact that installation of O rings is very easy and that they require little space. If the selected material the design of the groove are suitable, sealing based on O ring may play its role for a longer time (provided that the permitted temperature ranges, etc. are adhered to). The most commonly used materials for the manufacture of O rings are NBR (nitrile butadiene rubber), FPM (fluoroelastomer), MVQ (methyl vinyl silicone rubber), EPDM (ethylene propylene diene monomer (M-class) rubber), etc. Among the less used ones is e.g. CR (chloroprene rubber).