Mechanical seal mechanical seal on the important parts to play, if useless, then the function of mechanical products will be greatly reduced, and in order to solve these problems, we will know why it can not be sealed? Find out why. Roughly summarized as follows:
 1 seal face wear

    (1) the balance of mechanical seals ¦Â also affects the degree of seal wear. Under normal circumstances, a balance of about ¦Â = 75% level of the most appropriate. ¦Â <75%, although the reduced wear, but the leak increased, increasing the possibility to open the sealing surface. For the high load (high PV value) of the mechanical seal face friction heat as the larger, ¦Â generally take 65% to 70% is appropriate for low-boiling hydrocarbon medium, etc., the temperature of the gasification medium is more sensitive, in order to reduce The impact of friction heat, ¦Â take 80% to 85% as well.

    (2) medium containing solid particles, the sealing surface into the solid particles is the main reason leading to seal failure. Face of solid particles into the friction from the abrasive effect of intense wear and tear to seal failure. Sealing surface of a reasonable gap, and the extent of the balance of mechanical seals, as well as seal face are caused by film's end flash and other solid particles into the open the main reason for leaving.

 2 High temperature effects

     (1) the use of carbonized graphite carbon - graphite ring one of the main seal failure. As the use, if graphite ring once more than the allowable temperature (usually in the -105 ~ 250 ¡æ), the surface will precipitate resin, friction will occur near the surface carbonized resin, when binder, it will soften the foam, Increase the leakage of the sealing surface, seal failure;

      (2) auxiliary seals (such as fluorine rubber, ethylene propylene rubber, all rubber) over allowable temperature, will rapidly aging, cracking, loss of playing hard. Flexible graphite is used in high temperature, good corrosion resistance, but its elasticity poor. And easy to rattle, easily damaged during installation.

    That we find the failure of mechanical seal products, the reason, then for maintenance to play a multiplier role.