Common Leaks In Rubber O-rings

From the current market, there are many varieties of rubber O-rings, which makes many rubber buyers dazzled, but the quality problem has plagued many buyers. In fact, first of all, from the material aspect, some domestic work in order to save costs, the material selected is The cheaper, the formula is also poor, so that the rubber O-ring problems during use.

Secondly, from the O-ring inspection, look at a good O-ring, the appearance must be bright and clean, no sticky skin, no burrs, fixed points, wind, bubbles, etc. in the details, no shortage of material, breakage, etc. There is no difference, meet customer requirements, etc. Here is a brief introduction to the common leaks and causes of O-rings.

There are usually four ways of leaking an O-ring: interface leakage, soaking, dispersing, and leaking.

O-ring interface leakage: The interface will leak at the sealing interface because the gasket is not tightly pressed, the flange contact surface is not properly cleaned, and the flange is deformed. Regarding the boundary of the world, it is preventable to use the cushioning material to be clamped in the flange surface.

O-ring soaking leakage: Because the raw materials of soft materials are mostly fibers, they are simply immersed in the medium, especially the pressure effect. Because of the capillary appearance, the medium will penetrate into the low pressure side to form a soak.

O-ring dispersion leakage: Under the advancement of the concentration difference, the medium leaks through the sealing gap or the substance transfer of the capillary that seals the data. Dispersion is the result of molecular movement and is not unidirectional. Pay special attention to both leakage and dispersion when the sealing pressure difference is extremely small or vacuum, or when sealing nitrogen, hydrogen and other penetrating substances, as well as highly toxic and radioactive substances.

O-ring damage leakage: the working conditions in the sealing part are poor, the thermal deformation is large, often subject to vibration, impact, improper installation, excessive tightening force, repeated use, tightening deformation, internal stress gathering, surpassing fatigue strength Damage, data aging, metamorphosis, etc. will cause damage and leakage. This type of leakage has a greater impact and damage, and it is necessary to strengthen prevention.