Self-priming pump start operation procedures

Start self-priming pump, pay attention to the correct direction of the pump shaft. Pay attention to abnormal sound and vibration during rotation. Pay attention to the readings of the pressure gauge and vacuum gauge. After the start, when the readings of the pressure gauge and the vacuum gauge indicate that they are stable after fluctuating for a period of time, it is indicated that the self-suction pump has been filled with liquid and enters the normal infusion operation. Before the self-priming pump enters the normal infusion operation, that is, during the self-priming process, special attention should be paid to the rise in water temperature in the pump. If the process is too long and the water temperature in the pump is too high, stop the pump to check the cause. If the liquid temperature in the self-priming pump is too high to cause self-absorption, it may be temporarily stopped. The liquid in the discharge pipe is used to backflow into the pump or the liquid is directly added to the pump to add liquid to the pump. The internal liquid cools down and then starts. If there is strong vibration and noise in the working process of the self-priming pump, it may be caused by cavitation in the pump. There are two reasons for cavitation: one is that the inlet tube flow rate is too large, and the other is that the suction process is too high. When the flow rate is too high, the outlet control valve can be adjusted to increase the reading of the pressure gauge. If the inlet pipe is clogged, it should be eliminated in time. When the suction process is too high, the installation height of the pump can be properly reduced. The self-priming pump stops the pump for some reason during the working process. When the pump is restarted, the outlet control valve should be opened slightly (not to be fully closed). This will not only facilitate the discharge of gas from the discharge outlet during the self-priming process, but also ensure that the tip is lighter. Responsible for starting under. Pay attention to check the pipeline system for leakage.

Self-priming pump parking precautions and operating sequence:

1. First, the gate valve on the discharge line must be closed.

2. Stop the pump.

3. In the cold season, the storage fluid in the pump body and the water in the cooling chamber of the bearing body should be vented to prevent freezing and splitting.