Tandem double mechanical seal can be made pressurized double seal can also be made without the pressure double seal, mechanical seal manufacturers to non-pressure double seal the most common. Providing a sealing surface of the sealing liquid cooling lubricant, by the built-in pump efficiency 3-loop cycle. Unanimously confirmed the seal (1) Make sure the seal is installed with the requirements of the model. (2) prior to installation and assembly diagrams carefully control the mechanical seal factory in Jinan, the number of parts are complete. (3) and the coil spring transmission of mechanical seals, which have left the spring, right-handed points, subject to the spin axis always choose.