A variety of high-quality plastic compounds is now available for use as sealing and rider rings in reciprocating compressors. But in many cases, these materials have not been developed specifically for use in a reciprocating compressor. For reasons of cost effectiveness, they are optimized for as wide a range of applications as possible, e.g. in the automobile and the chemicals industries. One well-known example is the so-called Bearing Grade PEEK which, despite its disadvantages, ...