Analysis of the failure of the mechanical seal of the sanitary centrifugal pump①

The shutdown of the sanitary pump is mainly caused by the failure of the mechanical seal. Most of the failure manifestations are leakage. The reasons for leakage are as follows:　　

① The main reasons for the leakage of the sealing surface of the dynamic and static ring are: the flatness of the end surface, the roughness does not meet the requirements, or the surface is scratched; there is particulate matter between the end surfaces, which causes the two ends to not operate at the same time; the installation is not in place and the method is incorrect.　　

②The leakage of the compensation ring sealing ring is mainly caused by: the gland is deformed, the pre-tightening force is uneven, and the installation is incorrect;