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Leak appearance of seal rubber O-ring

Update:06-12-2019
Summary:

Leakage appearance of rubber O-ring: Generally, there a […]

Leakage appearance of rubber O-ring:
Generally, there are four ways for the leakage of gaskets: interface leakage, infiltration leakage, scattered leakage, and damage leakage.
Interface leakage: The interface will leak on the sealing interface because the gasket is not tight enough, the flange contact surface is not smooth, and the flange is deformed. With regard to the leakage of the world, the use of soft padding to clamp in the flange surface can be prevented.
Penetration and leakage: Because the raw materials of soft materials are mostly fibers, they are simply impregnated by the medium, especially the pressure effect. Because of the capillary appearance, the medium will penetrate into the low-pressure side, constituting penetration.
Dispersion and leakage: Under the advancement of the concentration difference, the medium leaks through the material transfer occurring through the sealed gap or the sealed capillary. Dispersion is the result of molecular motion and is not unidirectional. When sealing the pressure difference is very small or in a vacuum state, or when sealing permeable materials such as nitrogen and hydrogen, as well as highly toxic and radioactive materials, special attention should be paid to the leakage and dispersion of the two types of leakage.
Damage and leakage: The working conditions in the sealed part are relatively poor, the thermal deformation is large, often subject to vibration and shock, the device is not suitable, the tightening force is too large, repeated use, shrinkage and deformation, internal stress will be gathered, beyond the fatigue strength and damage Damage and leakage will be formed by aging and transformation. This leakage has the biggest impact and the damage is great, so we must strengthen prevention.
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