Shutdown pump operation procedures are:
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(1) Slowly close the pump outlet valve, the valve quickly closed the moment, that is, the current close to the pump no-load current, immediately press the motor stop button and quickly close the pump outlet valve;
(2) pay attention to observe the pump last stop situation, record the pump lazy walking time (not less than 50s), after the rotor is stationary, the pump 2 to 3 laps;
(3) Close the pump bearings and seal packing cooling water valve, close the pump inlet valve, open the pump drain valve or pump inlet vent valve;
(4) cut off the pump oil circuit;
(5) cut off the motor cooling water circuit;
(6) stop pumping record;
(7) If the winter outage, should pay attention to the import pipeline sweeping line, to prevent pipeline freeze block.