What Should Be Noted in The Use Of Submersible Sewage Pumps?

Dec 30, 2025

The use of submersible sewage pumps is underwater, conveying mixed liquids containing solid materials. The pump is located very close to the motor and is arranged vertically. The weight of the rotating components is in the same direction as the water pressure borne by the impeller. These issues make the requirements for sealing, motor bearing capacity, bearing arrangement, and selection of sewage submersible pumps higher than those of general sewage pumps.

Precautions for the operation of sewage submersible pumps

 

1.When the sewage submersible pump is tested without water, the operating time must not exceed the rated time. The capacity of the suction tank can ensure that the water level is high when the sewage submersible pump is turned on and in operation, to ensure the cooling effect of the motor and avoid frequent starting and stopping caused by large fluctuations in water level. The frequent starting of large and medium-sized submersible sewage pumps has a significant impact on their performance.

2.When the humidity sensor or temperature sensor issues an alarm, or when there is abnormal vibration or noise during the operation of the pump body; When the output water volume and pressure decrease, or when the power consumption significantly increases, the submersible sewage pump should be immediately shut down for maintenance.

3.When some poorly sealed submersible pumps are immersed in water for a long time, even if they are not used, their insulation value will gradually decrease, making them unable to be put into use, and even insulation disappearance may occur in a shorter period of time than the continuous operation of sewage submersible pumps in water. Therefore, the backup of sewage submersible pump in the suction tank sometimes does not play a backup role. If conditions permit, it can be used as a dry backup outside the tank. When the running sewage submersible pump fails, it should be immediately stopped and lifted up, and the backup pump should be put down again.

 

 

4.Sewage submersible pumps should not be started or stopped too frequently, otherwise it will affect the service life of the submersible pump. When stopped, the water in the pipeline flows back. If restarted immediately, it will cause the load on the electric pump to be too heavy and bear unnecessary impact loads; In addition, frequent opening and stopping of submersible pumps can damage components with poor impact resistance and cause damage to the entire electric pump.

5.After shutdown, the motor cannot be restarted until it stops running.
6.When checking the submersible pump, the power must be cut off.
7.When the sewage submersible pump is working, do not wash items, swim or let livestock into the water nearby to avoid electric shock accidents in case of leakage of the electric pump.