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What aspects should be paid attention to when selecting sealing and corrosion-resistant O-ring materials?
2024-09-12
1. Mechanical movement speed
Different sealing ring materials have different adaptability to mechanical movement speed. At present, there are many materials for sealing rings, some of which are ordinary materials, which are difficult to adapt to the operation of fast mechanical equipment. Therefore, if it is used for sealing rings in places where fast mechanical equipment is running, the materials used should be high-end to meet the requirements of high-speed operation.
2. Working pressure
The sealing ring materials have different pressure tolerances, and the materials are also very sensitive to pressure. Different materials can withstand different pressure sizes. You can also choose materials according to the materials to be sealed. For example, if the material is crude oil, they can withstand a large pressure. If you use materials with poor bearing capacity, it will cause the material bearing capacity to exceed the range that it can withstand, and the service life of the sealing ring will be reduced. Therefore, you should choose materials with high bearing capacity.
3. Material compatibility
This is very important. Sometimes, the sealing ring material needs to be in direct contact with the sealed material. If the two are not compatible, it may cause one material to invade the other, causing system pollution, or cause sealing ring damage and material leakage. In addition, the selected sealing ring material cannot be corroded by the substance, nor can it produce chemical changes with the substance, so this point should be paid special attention to when selecting materials.
4. Ambient temperature
When selecting the sealing ring material, the ambient temperature should also be considered. Different materials have different high temperature resistance ranges. For some materials, the application site temperature is too high or too low, which is not conducive to the function. In addition, the material's own ability to adapt to temperature is very limited. Low temperature will also cause the sealing ring to become brittle. Too high temperature will also reduce the tensile strength and strength of the sealing ring.
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