The reason for the leakage of newly installed mechanical seal after it is put into operation is mostly the installation problem.

one ）The designed face specific pressure is too small to meet the face specific pressure required by the mechanical seal;

two ）The compression of mechanical seal spring is too small;

three ）The roughness of mechanical seal end face does not meet the requirements;

four ）The flatness of mechanical seal end face is not enough;

five ）The mechanical seal ring is deformed under the action of pressure, temperature and other factors, which destroys the flatness of the seal face;

six ）The moving ring is stuck in the transmission seat;

seven ）The moving and stationary rings are not concentric;

eight ）In balanced mechanical seals, the load factor is not appropriate (often too small);

nine ）In the bellows type mechanical seal, the inner and outer diameters of the bellows are not suitable;