Solid Back Up Rings & O-Rings

- O-rings made of PTFE are used in all applications in which the chemical resistance of conventional elasomer O-rings is not adequate. PTFE O-rings can only be used as static seals. - PTFE O-rings are manufactured by machining and can be produced in all sizes. - Back up rings for use with a seal will always have a special part no. allocated by Moontown.