Correct use of the pump

Release time:

Feb 21,2023

1. Start

(A) Before the pump is connected, determine whether the rotation direction of the motor is correct and whether the rotation of the pump is flexible (or check the motor steering after the pump is filled with water, and it is strictly forbidden to idle without water in the pump)

(B) close the gate valve on the discharge line.

(D) Turn on the power supply. When the pump reaches normal speed, gradually open the gate valve on the discharge line and adjust it to the required working conditions. When the gate valve on the discharge pipe is closed, the continuous operation time of the pump should not exceed 3 minutes.

2. Stop

(A) Gradually close the gate valve on the discharge line and cut off the power supply.

(B) If the ambient temperature is lower than 0 ° C, the water in the pump should be released to avoid freezing and cracking.

3. Operation

(A) During starting and running, it is necessary to pay attention to whether the meter readings, bearing temperature rise, packing drip and temperature rise, and pump vibration and noise are normal. If abnormal conditions are found, they should be dealt with in time.

(B) The difference between the bearing temperature and the ambient temperature does not exceed 40 ° C, and the maximum bearing temperature rise is not more than 80 ° C

(D) The bearing oil level should be kept in the normal position, not too high or too low, and lubricating oil should be replenished in time when it is too low.

(E) If the gap between the sealing ring and the impeller is too worn, a new sealing ring should be replaced (the diameter gap of the new pump is about 0.15~ 0.25mm)

(F) The pump should be operated as close as possible to the performance point (flow, head, etc.) specified on the nameplate, so that the pump can work in the high-efficiency area for a long time to achieve the maximum energy saving effect.

Due to various reasons during operation, there will be failures. The common faults of motors are mainly divided into mechanical and electrical aspects. 　　(1)机械方面有扫膛、振动、轴过热、损坏等故障。异步电动机定、转子之间气隙很小，容易导致定、转子之间相碰。一般由于端盖轴室内孔磨损或端盖止口与机座止口磨损变形，使机座、端盖、转子三者不同轴引起扫膛。

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