Piston seals

Piston seals are designed to prevent the leakage of fluids. Set into a groove, they should generally be slightly bigger than the groove itself.

The actual dimensions and shape must be carefully studied and vary according to the diameter, pressure and media to be sealed. The most common piston seals are made of a layer in PTFE and a rubber O-ring. These seals can be both single and double-acting and with or without a back-up ring.

A typical challenge is to design a seal that can cover a wide range of pressures while retaining its sealing properties.

The most common field of application of piston seals is in hydraulics and pneumatics.

Piston seals: materials

The most common materials are virgin PTFE and carbon or bronze filled PTFE. Other materials are bronze/MoS2 filled PTFE, aromatic polyester filled PTFE, glass filled modified PTFE.

We can also offer NORSOK M710 certification for virgin and modified PTFE, soft carbon PTFE, PEEK and tribological PEEK.