Attention details for the use of mechanical seals for slurry pumps

The mechanical seal for slurry pump has strong anti-clogging performance, excellent corrosion resistance, and can also run stably for the slurry medium containing solid particles. 2C-AH, 4/3C-AH and other AH series slurry pumps are designed and manufactured with low manufacturing cost, simple structure and universal parts. HZ-75/47.6-B2 mechanical seal default material pairing: dynamic and static rings are SUS304, 2Cr13 inlaid hard alloy or reaction sintered integral silicon carbide, auxiliary sealing ring can be selected from F-26 fluorine rubber, EPDM rubber, etc. , the base material can be SUS304, SUS316L, 2Cr13, etc.; this type of mechanical seal adopts a single cooling water hole design, and the external high-pressure (at least 0.1Mpa higher than the pump chamber pressure) clean cooling water provides dynamic cooling of the dynamic and static friction pair, and the cooling water is the same It will also enter the pump cavity and mix with the medium. The external cooling water below the pressure of the pump cavity will cause the medium to leak out through the cooling water hole. At the same time, this type of mechanical seal is very sensitive to the dimensional displacement between the shaft and the pump casing. If the axial dimension of the pump shaft is adjusted before replacing the new mechanical seal, it may cause the mechanical seal to fail. Attention should be paid to the installation. Precautions for the use of mechanical seals for slurry pumps: ①The mechanical seals of slurry pumps used by slurry pump manufacturers are generally balanced double-end mechanical seals, equipped with short cooling water pipes and pressure gauges. ②The slurry pump mechanical seal used by the manufacturer is manufactured by a professional mechanical seal factory, and has been installed and debugged before leaving the factory. ③ There are two exposed pipe joints in the mechanical seal part of the slurry pump, which are the inlet and outlet of the shaft seal water respectively. The water outlet is on the same side as the pump outlet, and the water inlet is on the other side. ④ Before using the pump equipped with mechanical seal, the shaft seal water must be connected first, and the shaft seal water can be turned off after stopping the pump for 3 minutes. ⑤When supplying spare parts of slurry pump mechanical seal to users, the manufacturer usually installs the mechanical seal in the stuffing box and supplies it as a complete set. ⑥When the slurry pump equipped with mechanical seal and spare parts of mechanical seal are not used for a long time, the mechanical seal part should be filled with N46 mechanical oil to prevent the mechanical seal from rusting and the internal rubber parts from failing.