Piston seals are dynamic seals, that typically refer to as single-acting (pressure acting on one side only) and double-acting (pressure acting on both sides) seals.

Piston seals for hydraulic cylinder: Piston seals ensure fluid or other media do not bypass the piston due to the system pressure pushing the piston down the cylinder during a pressure cycle. Its main function is to seal the gap between the piston and cylinder bore and avoid the fluid of the rod cavity and piston cavity mixing. The piston seal is the main seal of the hydraulic cylinder, it requires pressure resistance under when static status, while extrusion resistance, wear resistance, and long service life under dynamic status.

Common piston seals are SPG, SPGW, SPGO, UKH, NCF, OHM, OUY, ROI, SPN, OK type, and so on.