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What are the common leakage methods of rubber O-rings?

by:DMS Seals     2021-03-28


What are the common leakage methods of rubber O-rings?



From the current market, there are many types of rubber O-rings, which dazzles many rubber buyers, but the quality problem is plagued by many buyers. In fact, we first explain from the material aspect. Some domestic work chooses to save costs. The material is relatively cheap, and the formula is also relatively poor, which causes problems in the use of rubber O-rings. And our Xinhuaxu selected materials are original materials imported from abroad, the formula is reasonable, and the quality is controlled from the source.



Secondly, from the perspective of O-ring inspection, look at a good O-ring. The appearance must be bright and clean without sticky skin, no burrs, fixed points, wind, air bubbles, etc. in the details, and no material shortage, breakage, etc. in quality , There is no difference in size, meeting customer requirements, etc. The following is a brief introduction to the common leakage methods and reasons of O-rings.










Generally, there are four ways to show the leakage of O-rings: interface leakage, immersion leakage, scattered leakage, and damage leakage.



O-ring interface leakage: The interface leaks at the sealing interface due to insufficient gasket compression, improper finish of the flange contact surface, and flange deformation. Regarding the leakage of the world, it can be prevented by using soft gasket to clamp in the flange surface.



O-ring soaked and leaked: Because most of the soft materials are made of fibers, they are simply soaked by the medium, especially the pressure effect. Because of the capillary appearance, the medium will permeate to the low-pressure side, forming a permeation.



O-ring dispersion leakage: under the advancement of the concentration difference, the medium leaks due to the material transfer through the sealed gap or the capillary of the sealed material. Dispersion is the result of molecular motion, and it is not one-way. Pay special attention to the two types of leakage when the sealing pressure difference is very small or in a vacuum condition, or when sealing nitrogen, hydrogen and other permeable materials, as well as highly toxic and radioactive materials.



O-ring damage and leakage: The working conditions of the sealing part are relatively bad, the thermal deformation is large, and it is often subjected to vibration and impact, the device is improper, the tightening force is too large, repeated use, shrinking deformation, internal stress concentration, and beyond Damage due to fatigue strength, data aging, transformation, etc. will cause damage and leakage. This kind of leakage has a great influence and great damage, so it is necessary to strengthen the prevention.



I hope that the above content can help you better understand the common leakage methods of O-rings. If there is anything you don’t understand, you can directly communicate with our customer service. We will serve you wholeheartedly and thank you for watching.


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