Start, run and stop of MD multistage pump

Start, run and stop of MD multistage pump

　　MD multi-stage pump start

　　 1. Before starting MD multi-stage pump, the rotor of the pump should be rotated to check whether the rotor is flexible

　　2, check whether the rotation of the motor is consistent with the rotation of the pump

MD multistage pump

　　3. Open the pump suction valve, close the pump outlet pipeline gate valve and pressure gauge cock to fill the pump with liquid, or use a vacuum system to remove the air in the suction pipe and the pump

　　4. Check the tightness of the connecting bolts of the pump and the motor and the safety conditions around the pump to make the pump in a ready state;

　　5. Start the motor. After the pump runs normally, open the pressure gauge cock and slowly open the pump outlet gate valve until the pressure gauge pointer points to the required pressure (control the pump head according to the outlet pressure gauge reading)

　　 MD multi-stage pump operation

1. This series of pumps balance the axial force by the balance mechanism in the pump, the balance liquid flows out from the balance device, the balance liquid cloth balance pipe is connected to the inlet section, or a short pipe is set outside the balance room, and the balance liquid flows through the short pipe. outer. To ensure the normal operation of the pump, the balance water pipe must never be blocked

　　2. During driving and operation, you must pay attention to the meter readings, whether the bearing heating, filling water leakage and heating, and pump vibration and sound are normal. If abnormal conditions are found, they should be dealt with in time

　　3. The change in bearing temperature rise reflects the assembly quality of the pump. The bearing temperature rise should not be higher than the ambient temperature of 35℃, and the maximum temperature of the bearing should not be higher than 75℃

　　4. There is a certain amount of axial force swimming in the pump rotor during operation, the axial movement should be within the allowable range, and the gap value between the end faces of the motor and the water pump should be guaranteed;

　　5. During the operation of the pump, check the wear of the impeller, sealing ring, guide vane sleeve, shaft sleeve, balance disc and other parts regularly, and replace it in time if the wear is too large

　　 MD multi-stage pump shutdown

　　 1. Before stopping the machine, close the pressure gauge cock and slowly close the outlet gate valve. After the outlet valve is closed, stop the motor, and close the suction valve of the pump after the pump has stopped.

　　 2. If the water in the pump is discharged, if it is not used for a long time, the pump should be disassembled, cleaned and oiled, and packaged for storage