1. Requirements after the mortar pump stops running
① After the centrifugal pump stops running, close the population valve of the pump, and then close the valves of the auxiliary system after the pump cools down.
② The shutdown of the high-temperature pump shall be carried out according to the provisions of the equipment technical documents. After the shutdown, turn the pump for half a turn every 20-30min until the pump body temperature drops to 50 ℃.
③ When the cryogenic pump is stopped, when there are no special requirements, the pump shall be often filled with liquid; The suction valve and discharge valve shall be kept normally open; For cryogenic pumps with double face mechanical seals, the level controller and the sealing fluid in the pump sealing cavity shall maintain the grouting pressure of the pump.
④ For the pump conveying media easy to crystallize, solidify and precipitate, the pump shall be prevented from blocking after stopping the pump, and the pump and pipeline shall be washed with clean water or other media in time.
⑤ Discharge the liquid accumulated in the pump to prevent corrosion and frost crack.
2. Storage of mortar pump
① The pump that has not been installed shall be coated with a layer of appropriate antirust agent on the unpainted surface, the oil lubricated bearing shall be filled with appropriate oil, and the grease lubricated bearing shall be filled with only one kind of grease instead of mixed grease.
② The liquid in the pump casing is cleaned by suction, and the liquid in the pump casing is flushed by suction, and the pump casing is flushed by suction.
③ Drain the oil from the bearing box, then fill it with clean oil, thoroughly clean the grease and then fill it with new grease.
④ Seal the suction port and discharge port, store the pump in a clean and dry place, protect the motor winding from moisture, and spray the inside of the pump shell with antirust liquid and anti-corrosion liquid.
⑤ Rotate the pump shaft once a month to avoid freezing, and lubricate the bearing. Requirements after shutdown
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