The polyurethane O-ring has high mechanical strength, oxidation stability, flexibility and resilience, excellent oil resistance, solvent resistance, water resistance and fire resistance.
The polyurethane O-ring still has good sealing and shock absorption in the environment of oil, acid, grinding and chemical erosion.
Therefore, it is the most widely sealed hydraulic and pneumatic transmission system. It is suitable for sealing piston in reciprocating hydraulic cylinder. It is suitable for cylinders of construction machinery and in bad working conditions.