■Description

The seal fails to seal the gap completely.

■Contributing factors

• The groove of the seal is improper

• The seal is at the pressure and temperature in high vacuum environment

• The seal of low hardness or high plasticizing

• Processing time of the seal is insufficient

■Recommended improving method

• Avoid using the seal of high plasticizing

• Carefully select the seal, and never buy products that are too cheap

• Ensure the dimension of the seal is applicable to the groove, so as to avoid outgassing

• Correctly calculate the ratio of temperature to pressure

• Correctly select the material