1, Small leakage. The leakage of the rubber seals needs to be very small with a good sealing effect. The sealing effect will improve automatically with the increase of the pressure of rubber oil. Even under harsh working conditions such as high pressure and high temperature, the leakage of rubber seals is not increased obviously.
2, Good compatibility. The rubber seals has been soaked in rubber oil for a long time,so it is very easy to swell, dissolve or harden. As a result, the sealing effect is lost. Therefore, the rubber seals are required to have good compatibility with rubber oil.
3, Small friction resistance. In order to avoid or reduce the low pressure creeping of rubber equipment, the relatively small static friction resistance and dynamic friction resistance are required for the rubber seals, and the friction coefficient should be very stable.
4,Long service life. The rubber seals should have good elasticity, heat resistance, cold resistance, pressure resistance, and wear resistance, as well as certain physical properties and mechanical strength. Additionally, the service life needs to be long.
5,Low price. The rubber seals should be easily produced and installed.The corresponding sealing grooves should be easily processed and manufactured. The sealed surface has relatively low requirements for the processing accuracy and it is at low price.
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