How to choose the right rubber seal material to ensure that its pressure resistance is not affected?

To choose the right rubber seal material to ensure that its pressure resistance is not affected under high-load operation, the following key factors can be considered:

Material hardness:

Choose the appropriate hardness: The hardness of the rubber seal (usually measured in Shore A durometer) affects its pressure resistance. Higher hardness generally provides better pressure resistance, but may also affect the sealing effect and elasticity. Choose the appropriate hardness range (for example, 60-80 Shore A) according to the application needs.

Material type:

Fluororubber (FKM): has excellent pressure resistance and is suitable for high temperature and chemical media environments.
Nitrile rubber (NBR): performs well in oil and lubricant environments and has good pressure resistance.
Hydrogenated nitrile rubber (HNBR): provides higher pressure resistance and high temperature resistance, suitable for high-load environments.

Material elasticity and recovery ability:

Choose materials with good elasticity and recovery ability: Even under high loads, these materials can effectively return to their original shape to maintain sealing performance.

Design and manufacturing quality:

Ensure that the design of the seal meets the application requirements: including reasonable cross-sectional shape and size to provide sufficient pressure resistance.
Check the manufacturing quality: ensure that there are no defects, such as bubbles, cracks, etc., which may affect the pressure resistance of the seal.

Working environment and conditions:

Consider the pressure changes in the working environment: select seal materials that can adapt to instantaneous pressure fluctuations.
Evaluate the effects of temperature, chemicals and wear: select materials that can still maintain good pressure resistance under these environmental conditions.

Testing and verification:

Perform pressure resistance testing: Before actual use, simulated tests are performed to verify the performance of the seal under the expected load to ensure that its pressure resistance meets the requirements.

By comprehensively considering the above factors, the appropriate rubber seal material can be selected and its pressure resistance under high-load operation can be ensured to be unaffected, thereby improving the reliability and service life of the equipment.