1. Single end mechanical seal: when the medium temperature is below 80 ° C, add oil, water and other clean liquids in the cooling tank for cooling. When the medium temperature is higher than 80 ° C, the two nozzles are added to the inner wall of the cooling tank for circulating cooling.

2. Double end mechanical seal: when the medium temperature is less than 180 ° C, it is cooled by jacket. When the medium temperature is greater than 180 ° C but less than 350 ° C, a high-level water tank is required to be set for cooling, relying on the jacket of the high-level water tank.

3. For mechanical seals with strong corrosive medium, clean liquid (its pressure shall be 0.05-0.1MPa higher than the pressure in the kettle) shall be input by auxiliary equipment for circulating cooling.