Hydraulic pump mechanical seal, also known as end face seal, has a pair of end faces perpendicular to the rotation axis. The containerized mechanical seal. Under the action of fluid pressure and compensating for mechanical external elasticity, the hydraulic pump relies on the matching of auxiliary seals to keep in contact with the other end and slide relative to each other, thereby preventing fluid leakage.

The common causes of leakage in underwater pumps are mechanical seals. Mechanical seals themselves are precision components with high requirements for design, machining, and assembly quality. When using mechanical seals for submerged pumps, various factors related to the use of mechanical seals should be analyzed to ensure that the mechanical seals are suitable for the technical requirements and medium requirements of various submerged pumps, and have sufficient lubrication conditions, in order to ensure the long-term reliable operation of the seals.