Common Faults And Maintenance Of Deep Well Submersible Pumps

Feb 20, 2025

Due to frequent operation and long working hours of many deep well submersible pumps, it is recommended to conduct maintenance once a year. For common faults, corresponding repairs should be carried out according to the following different situations:

(1) Unable to pump water or severely insufficient head: This is mostly due to the damaged bearings of the submersible pump. At this time, you can unscrew the upper and lower screws on the submersible pump, remove the water turbine blades and rotor, gently tap out the bearings, and then replace them with bearings of the same specification and model.

(2) Poor sealing: When the sealing box leaks oil, there will be oil stains at the inlet joint. You can unscrew the screws to check if the oil chamber has been filled with water. If the oil chamber has been filled with water, a new sealing box must be used. When replacing, first remove the pump cover, remove the impeller, rubber wood, gasket, water slinger and other accessories, then remove the inlet joint, remove the key and shaft sleeve on the shaft, and remove the fixing plate of the sealing box to replace the sealing box.

(3) Damaged and leaking water outlet pipe: Replace the water outlet pipe or take emergency measures to plug it.

(4) Starting capacitor failure: Replace with a capacitor of the same specification.

(5) Pump jamming: Most of the pump impellers are stuck by foreign objects. You can unscrew the center screw of the impeller and remove the impeller to remove sand, gravel, and other foreign objects.

(6) Leakage: This is caused by water entering the submersible pump body, resulting in leakage in the motor winding. Waterproof tape can be used to wrap it for waterproofing treatment, but it is important to soak it for several hours and check the insulation with a shaking table. Replace the main cable with insulation that does not meet the requirements or has no repair value.