What Are The Reasons For Mechanical Seal Leakage During The Operation Of Multi-stage Centrifugal Pumps?

(1) The sealing end face is not parallel.
(2) Worn shaft or sleeve.
(3) The pump shaft is bent.
(4) Corrosion, wear or scratches on the end faces of dynamic and static sealing rings.
(5) The static ring assembly is inclined.
(6) Lack of tension spring pressure.
(7) Excessive axial displacement.