Key points of seal use

1、 Select appropriate sealing materials and hydraulic oil, and adaptability to working temperature and oil compatibility.

2、 High geometric position accuracy (concentricity) and good materials (such as hard chromium plating) as well as the fine surface roughness of sliding parts relative to seals can prolong the service life.

3、For oil seal of hydraulic pump and motor journal, not only the roughness of sliding surface is required to be within ra0.25m, but also the surface is required to be plated with hard chromium. In the specific use process, it is necessary to adjust the radial spring force of the oil seal lip according to the specific situation to make it compress properly. In addition, during installation, the seal ring should be protected with a mounting sleeve or a thin gasket to prevent the spring from slipping out due to lip curling and twisting.

4、The common rolling method of the inner surface of the hydraulic cylinder not only improves the surface roughness, but also makes the surface cold hardening, which is conducive to extending the service life of the sealing ring. In addition, the pressure used, the length and type of sliding surface also have a great impact on the service life. Therefore, the time of "regular inspection" should be determined according to these situations.

5、 The sealing surface shall be well lubricated to prevent dirt from entering. The specified cleaning grade oil and correct installation method must also be used