Material properties of O-rings
1, O-ring surface showing bubble pits and scars:
The pressure changes too fast, the hardness and elasticity of the material are too low, the sealing ring material should be made of materials with good oxidation resistance and high temperature resistance, and the material with high hardness and high elasticity should be selected.
2, O-ring resistance to the medium problem:
Because the material does not meet the requirements (incompatible with the chemical medium, the material can not withstand high temperature or temperature beyond the expected) caused by chemical corrosion, thermal corrosion, electrical corrosion. Materials suitable for the medium should be selected, such as sealing materials that are more resistant to chemical media and more resistant to high temperatures.
3. Excessive expansion of the sealing ring:
After the O-ring is used in the working medium of the hydraulic system for a period of time, the sealing ring often expands excessively and the compression force increases. The permanent deformation rate of the material itself is too high. The physical properties of the sealing ring should be checked to meet the design requirements; Ensure the quality of sealing materials.
4, there are three ways to prevent compression deformation
(1) Select the rubber formula with better performance to improve the compression permanent deformation performance.
(2) Use a special "0" seal assembly tool to ensure that the "O" seal is reasonably compressed.
(3) The correct storage of the "O" seal tool, so that the weight of the heavy shaft component or spindle is not acting on a point or surface of the "O" ring.
Wuhan Heideparker Seals Co., Ltd. specializes in the production of high-precision seals, for O-ring has a wealth of production experience and product application experience, if you need to consult relevant information, please feel free to contact us 027-88779150!