[[TitleIndustry]]

Temperature and pressure affecting the sealing performance of rubber seals

Date:Oct 23, 2020

  The frozen rubber seals will become embrittlement and reduce elasticity, resulting in air leakage. During the moving process, high temperature will expand the volume of rubber seals and become soft, which will cause the friction resistance of rubber seals to increase rapidly and the pressure resistance to decrease. It is recommended that the working temperature of rubber seals be-10℃ ~ + 80℃.

  The temperature that affects the sealing performance of rubber seals. The frozen rubber seals will become embrittlement and reduce elasticity, resulting in air leakage. During the moving process, high temperature will expand the volume of rubber seals and become soft, which will cause the friction resistance of rubber seals to increase rapidly and the pressure resistance to decrease. It is suggested that the working temperature of rubber seals be-10℃ ~ + 80℃. If factors such as moving speed, surface roughness and poor lubrication are increased, friction heating will occur, which will affect the rubber seals.

  The pressure that affects the sealing performance of rubber seals. The cylinder body has starting pressure, working pressure and impact force. For low voltage operation, seal with poor friction performance and low starting resistance should be selected. Under high pressure, the compression deformation of rubber seals should be considered, and the anti-extrusion support ring is needed. In addition, the working pressure range of rubber seals of different materials is different. Rubber seals with a maximum pressure range of 25 ~ 315bar. To improve the compression resistance, high-strength rubber back-up ring and unique lip design can be adopted to improve its ability to bear certain pressure. The effect of temperature and pressure on the performance of rubber seals is interrelated and must be considered comprehensively.


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