The P01 type seal is a high-performance U-shaped polyurethane piston seal designed for one-way sealing of hydraulic cylinders. It features an asymmetric U-shaped cross-section with a retracted outer sealing lip. The inner diameter of the seal adopts interference fit with the groove bottom diameter, ensuring stable pre-tightening force and reliable fitting. Complying with ISO 5597 standard cavity specifications, this seal is widely used for one-way piston sealing in construction machinery, support cylinders and hydraulic press equipment.

Made of high-performance polyurethane (PU) material, it features excellent elasticity, compression recovery and abrasion resistance. The material maintains stable sealing performance under frequent dynamic reciprocating motion and long-term pressure conditions. It offers good medium resistance, outstanding fatigue resistance and long service life under continuous hydraulic working cycles.

• Asymmetric U-shaped Cross-section Design: The unique asymmetric U-shaped structure with retracted outer sealing lip optimizes the stress distribution of the seal, reduces friction resistance, and improves dynamic sealing stability during reciprocating movement.
• Interference Fit Structure: The inner diameter of the seal is in interference fit with the groove bottom diameter, which provides stable and lasting preload force, ensures close attachment to the groove, and effectively avoids gap leakage caused by loose fitting.
• Excellent Static and Dynamic Sealing Performance: The seal delivers superior sealing effect in both static pressure holding state and dynamic reciprocating working condition, achieving zero leakage under rated working pressure with stable pressure holding performance.
• ISO 5597 Standard Cavity: Designed strictly in accordance with ISO 5597 international standard groove size, with strong universality and interchangeability, convenient for standardized installation and replacement.
• Professional One-way Piston Sealing: Optimized for one-way pressure-bearing and one-way sealing working conditions, it provides accurate and reliable one-way pressure maintaining and sealing effect for hydraulic piston systems.

Widely applied to construction machinery, hydraulic support cylinders, hydraulic press equipment and other standard hydraulic systems that require one-way piston sealing, suitable for medium and low pressure to conventional high-pressure hydraulic working conditions.