1, single-stage single-suction centrifugal pump start: (1) before the pump should be connected to determine the motor rotation direction is correct, the pump rotation is flexible. (2) Turn off the gate valve on the discharge line. (3) fill the pump with water, or use a vacuum pump to drink water. (4) Turn on the power, when the pump reaches the normal speed, then gradually open the discharge valve on the pipeline. And adjust to the required conditions, the discharge valve on the gate closed, the pump can not work more than 3 minutes. 2, single-stage single-suction centrifugal pump stopped: (1) gradually close the discharge valve on the pipeline, cut off the power. (2) If the ambient temperature is below 0 ℃, the pump water should be released to prevent cracking. (3) If it is stopped for a long time, pump should be disassembled and cleaned, packed and stored. 3, single-stage single-suction centrifugal pump operation: (1) in the car and operation process, we must observe the instrument reading, bearing fever, packing leakage and fever and pump vibration and noise are normal, if abnormalities should be found Instant processing. (2) The maximum bearing temperature is not greater than 80 ℃, the bearing temperature shall not exceed the ambient temperature than 40 ℃. (3) normal packing, water leakage should be a small amount of uniform. (4) bearing oil level should be maintained in the normal position, not too high or too low, too low should be replenished oil. (5) If the seal ring and the impeller with the gap of the excessive wear and tear should replace the new seal ring.