I. The O-ring has hardened

Cause: The use temperature may exceed the heat resistance limit temperature of the rubber material of the sealing ring.

Countermeasures: The sealing ring shall be made of materials with better heat resistance.

II. The O-ring swells

Cause: The material of the seal ring is not suitable for the sealing medium.

Countermeasures: Select appropriate rubber materials.

III. O-ring loses elasticity

Cause: It may be caused by a variety of factors, such as sealing medium, high temperature, excessive compression, etc., which will lead to the loss of elasticity of the seal ring.

Countermeasures: analyze the causes and select corresponding countermeasures.

IV. O-ring is cracked

Reasons: mainly due to two reasons. First, the chamfer may be insufficient or the assembly may be rough. Second, the groove does not match the O-ring.

Countermeasures: chamfer the installation position to increase the surface finish. Improve the groove size of the seal.

V. The peripheral surface of O-ring is scratched

Cause: The O-ring surface may be scratched on the thread and acute corner when installing the O-ring.

Countermeasures: When installing the O-ring, use a protective fixture to avoid scratching the O-ring surface.

6. The O-ring is worn

Cause: This phenomenon is mainly caused by the rough machining of the mating surface contacting with the O-ring.

Countermeasures: The surface roughness of the mating surface shall be processed according to the standard.