Correlation between application characteristics of sealing ring and material selection

Sealing ring is a kind of seal, the selection of sealing ring material is of great significance to its sealing performance and service life. The general sealing ring can achieve a good sealing effect under a certain high temperature and high pressure. Moreover, the sealing ring has the advantages of simple structure, convenient use and maintenance, strong corrosion ability, not easy to age, long working life and wear resistance.

Material selection and performance correlation analysis of sealing ring:


1. Media compatibility:

It is very important to choose the sealing material according to the sealing medium, because the sealing ring will be in direct contact with the sealing medium, if there is no good compatibility between them, it will not only damage the sealing ring but also pollute the sealing medium . The material of the sealing ring should not be subject to a series of conditions such as corrosion and wear of the sealing medium, chemical reactions, etc., special circumstances require special consideration.

2. Mechanical speed:

The adaptability of the seal material to the mechanical movement speed is also different. When the mechanical rotation speed is high, the common material seal may fail and cause leakage.

3. Working temperature:

The temperature has a great influence on the performance of the sealing material, and neither too high nor too low is acceptable. Too high temperature will reduce the hardness and stretchability of the seal ring, and too low temperature will make the seal brittle. Therefore, each sealing material has its own minimum and maximum temperature. Now most of the sealing ring materials are mixed materials, so the temperature should be more accurately controlled.

4. The pressure of work:

The material of the sealing ring is also very sensitive to the working pressure. There is a big difference in the pressure that the sealing ring made of different materials and the sealing ring of different types can withstand. Therefore, the sealing ring products have pressure resistance and oil resistance. , Temperature resistance. For oil seals, the working pressure is relatively small, if it exceeds its tolerance range, it will not only cause leakage but also reduce the service life of the sealing ring.