Can the O-ring be repaired and used after it breaks? It is possible, but the gap area must be eliminated first to understand that the gap is becoming more and more glossy. Unnecessary dust and residue must also be removed, and then welding wire with good plastic deformation should be used for internal welding, and then repaired into spray welding. If the cracks are relatively large, a connecting layer must be used.

During the entire welding process, short arcs can be applied to reduce the harm of heat generation to the O-ring seal. Heating must be carried out before spray welding, and the temperature cannot be immediately cooled after welding. It should be slowly cooled until it is cooled before forming.

During the welding repair process of the O-ring, professional welding tools should be used, and the welding nozzle and protrusion should be vertical or leave a certain angle of view. The wire feeding of the welding machine should be uniform.

As a hydraulic seal that is frequently used, there are more and more types of O-ring seals, and the difficulty coefficient for customers to choose is also increasing. In order to better ensure excellent sealing performance in application, these aspects are very important when choosing O-ring seals!

Firstly, it is necessary to connect its main parameters such as constant tensile stress, tensile compressive strength, tensile deformation, elongation, etc. Especially, its tensile compressive strength is crucial. When the O-ring is under tension, it should be continuously stretched until it reaches the fracture position to withstand the tensile stress.

In addition, several main parameters are also important. To put it simply, the elongation is the ratio of the product deformation and the increase in elongation to the original length when the O-ring is subjected to tensile stress. The constant elongation stress is the stress that should be achieved during a certain type of tensile length.

At present, many O-ring seals are manufactured using rubber. Therefore, when choosing an O-ring seal, we must also consider the strength of the rubber. Strength indicates the rubber's ability to withstand external working pressure. Generally speaking, the higher the strength of the rubber, the better the compressive strength and wear resistance of the O-ring seal. However, it is not easy to withstand cold, so the strength of the O-ring seal must be selected based on the application situation.

In addition, the shrinking characteristics of O-ring seals must also be considered. As O-ring seals often have to be in a shrinking state in application, because rubber itself has a certain viscoelasticity, the shrinking stress will become more and more relaxed after shrinking. Once the working pressure is removed, the foundation cannot respond to the original characteristics, which will endanger the actual sealing effect.

As we all know, the airtightness and applicability of choosing an O-ring are closely related to its raw materials. Therefore, when choosing an O-ring, we should pay attention to the following aspects:

(1) The O-ring should have good ductility and resilience

(2) It should have a certain level of impact toughness, such as expanded compressive strength, rebound compressive strength, etc

(3) Has stable characteristics and is less prone to solubilization in different substances

(4) The specification accuracy of the O-ring is high

(5) It is less prone to surface erosion and less prone to environmental pollution of substances.