1. Due to the erosion of water flow, the inner wall and impeller of the water pump channel become rough and uneven, and the friction coefficient of the water pump channel increases. In addition, the flow velocity of water in the pump is high, resulting in an increase in head loss. Reduced hydraulic efficiency.

2. Due to the addition of drugs or water quality in front of the pump, serious scaling or corrosion may occur inside the pump casing. Severe scaling inside the pump casing can increase the wall thickness of the pump casing by about 2 ram, and scale nodules form on the inner wall of the pump, reducing the volume of the pump body, pumping capacity, and rough flow channels, resulting in increased head loss. The efficiency of customer accumulation and hydraulic efficiency are both reduced.

3. Casting caused by water pump processing technology

Defects, cavitation, abrasion, corrosion, and chemical erosion cause voids or cracks in the pump flow channel, and vortex formation during water flow, resulting in energy loss. Reduced hydraulic efficiency.

4. Cavitation on the surface of the impeller. Due to the negative pressure generated during the operation of the blades against the water surface, when the pressure Pk<Pva, steam pockets and honeycomb surfaces are generated, which, under the action of electrochemical corrosion, cause cavitation of the pump blades.

5. Volume loss and mechanical loss. Due to the prolonged use of the pump, mechanical wear leads to leakage and increased resistance, resulting in a decrease in volumetric and mechanical efficiency.

The above reasons have led to poor performance of the water pump. The operating efficiency can be reduced by 2-5%, and in severe cases, the pump efficiency can be reduced by more than 10%.