1. Interface leak

Interface due to the gasket pressure is not enough, improper contact surface finish, deformation and so on will produce leakage on the sealing interface.

2. Infiltration leakage

As the material of soft materials is mostly fiber, it is easy to be infiltrated by the medium, especially the pressure effect.Due to capillarity, the medium will penetrate to the low pressure side, forming permeation.

3. Leakage diffusion

Under the push of the concentration difference, the medium passes through the sealing gap or the material produced by the capillary of the sealing material and produces leakage.Diffusion is the result of molecular motion and is not unidirectional.In the sealing pressure difference is very small or vacuum state, or sealing nitrogen, hydrogen and other permeable substances, as well as highly toxic, radioactive substances, special attention should be paid to the infiltration and diffusion of two leakage.

4. Destroy the leak

In the sealing part of the working conditions are relatively bad, thermal deformation, often subjected to vibration, impact, improper installation, fastening force is too large, repeated use, compression deformation, internal stress concentration, more than fatigue strength and damage, material aging, deterioration and so on will cause damage and leakage.This leakage caused the biggest impact, harm is also great, to strengthen prevention.