Mechanical seal O-ring issues
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This post was last edited by —Lantian— on 2011-4-14 at 18:53. Regarding the mechanical seal of the pump, it was found during maintenance that the O-ring of the rotating ring was damaged and had turned into a black powder, losing its original shape. I would like to ask everyone: could the possible reasons be heat-induced hardening of the O-ring or damage caused by impact?
Reply to 1# payscj: This phenomenon is caused, first, by the frictional heat generated by heating not being dissipated; possible reasons for this are dry friction occurring in the mechanical seal, as well as an excessive compression amount. Second, it can be due to chemical corrosion.
Become a black powder? What material is the dynamic seal ring of the poster’s device?
Reply to 3# strong1125: Nitrile rubber
Reply to 2# zhouhuafeng: The medium used is basically neutral, the degree of compression is not high, and it is in a dripping state before startup.