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(1) The wear resistance is one of the most important indicator of the friction pair materials, ie wear, long life.

(2) good corrosion resistance. The result of wear and tear will reduce the service life, corrosion will increase the end gap, so that media leaks increased.

(3) Japan IKO bearing strength. , You must select a certain bearing strength of the material to avoid the intensity of destruction and face deformation.

(4) Good heat resistance and thermal conductivity. The friction heat will give the wear of the friction pair is adversely affected in order to prevent the friction pair of thermal stress than the material allowable stress is conducive to the maintenance of face between the liquid film face materials must have good heat resistance and thermal conductivity.

(5) The friction coefficient is small and there is a certain amount of self-lubrication.

The friction coefficient of a direct impact on the size of the frictional heat, friction in many cases the end is not in full state of lubrication Friction Group on the choice of materials must take into account these two factors.

To date, no one material can meet the above requirements. Selection, should focus on the main factors affecting the sealing performance, and the rational design of institutions to make up for the deficiencies of the material itself, as far as possible to meet the sealing requirements.