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Can the O-ring be repaired after fracture?

Can O-ring fracture be repaired for secondary application? It is possible, but must first eliminate the gap area, understand the gap more and more gloss, but also must remove the unnecessary dust, residue, and then apply the plastic deformation of better welding wire for internal use, and then refurbish into spray welding, if the crack is larger, then must apply the connecting layer.

In the whole process of repair welding, short arc can be applied, which can reduce the harm of heat to the O-ring, must be heated before spray welding, the temperature can not be cooled immediately after welding, should be cooled slowly, until after cooling, and then let it take shape.

In the whole process of welding repair, professional welding tools should be applied, welding nozzle and protruding surface should be vertical or set aside a certain Angle of view, and the welding machine wire feed should be symmetrical.

As a more frequently used hydraulic seal, the type of O-ring is more and more, the difficulty factor of customer selection is also higher and higher, in order to better ensure the application of good tightness, the selection of O-ring when these aspects are very important!

First of all, we must connect its constant elongation stress, tensile compressive strength, tensile deformation, elongation and other main parameters, especially its tensile compressive strength is very critical, when the O-ring is stretched in the case of stretching, it continues to stretch until the fracture site, the tensile stress that can be borne.

In addition, several types of main parameters are also very important, to put it simply, the tensile rate is the proportion between the O-ring deformation when it is subjected to tensile stress, the extension increase and the original length, and the fixed elongation stress is the stress that should be achieved at a certain type of tensile length.

At this stage, many O-rings are made of rubber, so in the case of choosing O-rings, we must also take into account the strength of rubber, strength indicates the working ability of rubber against external working pressure, in general, the higher the strength of rubber, the higher the compressive strength of the O-ring, the wear-resistant performance will be better, but it is not easy to resist cold. Therefore, the O-ring strength must be selected according to the application condition.

In addition, must also take into account the reduction characteristics of the O-ring, because the O-ring in the application of the case often must be in the reduction of the situation, because the rubber itself has a certain viscoelasticity, after the reduction of stress will be more and more relaxed, once the working pressure is removed, the foundation can not respond to the original characteristics, which will harm the actual effect of sealing.

As we all know, the tightness and application scope of the selection of O-rings are very closely related to its raw materials, so we should pay attention to the following aspects in the selection of O-rings:

(1) O-rings should have good ductility and resilience.

(2) There should be a certain impact toughness, such as expanding compressive strength, resilient compressive strength, etc.

(3) With stable characteristics, it is not easy to produce solubilization in different substances.

(4) The O-ring specifications are highly accurate.

(5) It is not easy to cause corrosion on the surface, and it is not easy to pollute the environment.


Name: Kevin Li





Add:F4C17, Building 3, Huiquan science park, Taoyuan East Road, Shishan Town, Nanhai District, Foshan city, Guangdong Province, P.R. China 528225





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