Single acting A209 buffer seal is used as the first sealing element in hydraulic cylinders rod application. Its purpose is to limit pressure peaks and protect the secondary seal. It is a two part set consisting of one high performance PU 92 ring and one POM support ring.

A209 cannot be used on its own as a main sealing element. It is recommended to be combined with other rod seals, such as A151, A154, etc. 

A209 buffer seals can be used in construction machinery, mobile platforms, forklifts, cranes, injection machinery, as well as any other type of standard cylinders.