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How to solve the problem of seal failure

The seal is a material or a part that prevents fluid or solid particles from leaking from adjacent joint faces and prevents intrusion of external impurities such as dust and moisture into parts inside the machine.
The seal manufacturer pointed out that there are many internal pores in the poor quality graphite ring. During the manufacturing process, the gas accumulated inside the graphite expands and the carbon particles are blown out. The low-quality graphite ring is activated in the seal and its carbon particles. It is easy to fall off, and the sealing surface is stuck when the sealing is stopped. The flaw on the cylindrical surface in the sealing surface is likely to be caused by the foreign matter entering the sealing surface or improperly installed.
The annular groove on the sealing surface is mostly caused by the deposition of solid particles on the sealing surface. The crack of the graphite ring is caused by the vibration of the transmission member, the increase of the rubber ring and the internal stress of the graphite ring itself, and the coking is caused by Due to high temperature, it is common in high temperature hot oil medium of refinery. Several strong oxidants which are erosive to graphite, such as fuming sulfuric acid, nitric acid, hydrofluoric acid, sodium hypochlorite, aqua regia and perhydrate. Its corrosion is exacerbated with increasing temperature.
Often the overheating of the hard ring surface can cause severe wear on the seal ring, such as a vertical pump without cooling. In the case of high temperature and high pressure, the spring compression is too large, and the shaft movement will be too large, which will cause the transition wear of the sealing surface.

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