A mechanical seal means a device for preventing liquid leakage by at least a pair of end surfaces which are perpendicular to the rotating axis and maintained in jointing and sliding towards each other under the liquid pressure, the spring force (or magnetic force) of a compensation mechanism and an auxiliary seal.

Features of an assembled mechanical seal:
Pre-assembled design
Simply installed structure, easy operating
Simplified process for measuring and adjusting, etc.
Convenient installation and effective replaceability
The sealing elements can be protected from being damaged during installing the mechanical seal in troubleshooting, and the cost on maintenance can be reduced.