① After the sanitary pump stops running, the inlet valve of the pump should be closed, and the valves of the auxiliary system should be closed in turn after the pump has cooled down.
②The shutdown of the high-temperature pump should be carried out in accordance with the provisions of the equipment technical documents. After parking, the car should be cranked every 20 to 30 minutes until the temperature of the pump body drops to 50°C.
③When the cryopump is stopped, when there is no special requirement, the pump should always be filled with liquid; the suction valve and the discharge valve should be kept normally open; the cryopump with double mechanical seals, the liquid level controller and the sealing liquid in the pump seal cavity The grout pressure of the pump should be maintained.
④ Pumps that transport media that are easy to crystallize, solidify, and precipitate, etc., should be prevented from being blocked after the pump is stopped, and the pump and pipeline should be flushed with water or other media in time.
⑤Drain the liquid accumulated in the pump to prevent rust and frost cracking.