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What are the common leakage methods for vulcanized rubber O-rings (1)

Update:04-11-2021
Summary:

There are generally four methods for leakage of O-rings […]

There are generally four methods for leakage of O-rings: page leakage, immersion leakage, decentralized leakage, and destruction leakage.

O-ring page leakage: due to insufficient gasket clamping, improper smoothness of the flange contact surface, flange deformation, etc., leakage will occur on the sealing page. The leakage of the interface can be prevented by clamping it in the flange surface with a sponge gasket.

O-ring soaking and leakage: Since most of the raw materials of soft materials are chemical fibers, they are easily impregnated by substances, especially the actual effect of working pressure. Due to the pore-like phenomenon, the substance will penetrate to the low voltage side and the composition will penetrate.

O-ring decentralized leakage: Under the impetus of the difference in content, the substance passes through the sealing gap or the chemical substance produced by the capillary of the sealing material and leaks. Decentralization is the result of the thermal movement of molecules, and it is not unilateral. When the sealing pressure difference is very small or the vacuum pump condition, or the sealing of nitrogen, hydrogen and other permeable chemical substances, and their toxic, radioactive elements, attention should be paid to the two types of leakage and decentralization.
O-ring damage and leakage: In the sealed position, the standard compares to extremes, thermal deformation is large, frequent vibration, impact, improper equipment, excessive tightening force, repeated and frequent application, shrinkage deformation, thermal stress concentration, and excess fatigue Damage to the limit, material embrittlement, growth, etc. will cause damage and leakage. This type of leakage causes relatively great harm, and the harm is also great, so we must strengthen the prevention.

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