Piston Seals

KOK piston seals are designed for reciprocating hydraulic cylinder applications where internal leakage control, pressure balance, and service life are critical.

Our piston seal profiles are suitable for both single-acting and double-acting cylinders and are engineered to provide stable sealing performance under varying pressure loads.

Design Considerations

• Bidirectional or unidirectional sealing configurations
• Optimized interference for pressure activation
• Controlled extrusion resistance
• Compatibility with mineral oils and water-based hydraulic fluids

Material options include polyurethane, NBR, and PTFE-based compounds depending on pressure, speed, and temperature requirements.