The application range of water pumps is extensive, and agricultural irrigation, fishery pumping water sources, and industrial sewage will be used. In the daily life, it is more common to encounter some problems related to the pump. At this time, we need to know some reasons for the failure of the pump and troubleshooting methods.

Cause / solution

1. The pump does not have water/water flow shortage:

   The cause of the failure: 1. The inlet and outlet valves are not open, the inlet and outlet pipes are blocked, and the impeller flow path impeller is blocked.

   2. The running direction of the motor is wrong, and the motor phase loss is relatively slow.

   3. The suction pipe leaks.

   4. The pump is not filled with liquid, and there is gas in the pump chamber.

   5. The imported water supply falls, the suction stroke is too high, and the bottom valve leaks.

   6, the pipeline resistance is too large, the pump selection is not appropriate.

   7. Pipes and pump impellers are partially blocked, scale deposits, and valve opening are insufficient.

   8, the voltage is low.

   9. Impeller wear.

   Method of exclusion:

   1. Check and remove obstructions.

   2. Adjust the motor direction and tighten the motor wiring.

   3. Tighten the sealing surfaces to remove air.

   4. Open the upper cover of the pump or open the exhaust valve to drain the air.

   5, stop inspection, adjustment (connected to the water pipe and with the use of suction is prone to this phenomenon).

   6. Reduce the curve of the pipeline and re-select the pump.

   7. Remove obstructions and readjust the valve opening.

   8, voltage regulation.

   9. Replace the impeller.

2. Power is too large:

   The cause of the fault: 1. The working state exceeds the rated flow range.

   2. The suction stroke is too high.

   3. Pump bearing wear.

   Solution: 1. Adjust the flow and close the small outlet valve.

   2. Reduce the suction stroke.

   3, replace the bearing

3. The pump has noise/vibration:

   The cause of the failure: 1, the pipeline support is unstable.

   2. The gas is mixed in the conveying medium.

   3. The pump produces cavitation.

   4. The pump bearing is damaged.

   5. The motor is overloaded and running.

   Solution: 1. Stabilize the pipeline.

   2. Increase suction pressure and exhaust.

   3. Reduce the vacuum.

   4. Replace the bearing.

4. Water pump leaks:

   cause of issue:

   1. Mechanical seal wear.

   2. The pump body has sand holes or cracks.

   3. The sealing surface is not flat.

   4. The mounting bolts are slack.

   Solution: Rest or replace parts, fix the bolts

Precautions

• The process for checking the cause of the pump failure should be:

  1. Check if the model and specifications of the pump are correct and meet the requirements of the working environment.

• 2, followed by checking whether there are operational irregularities, installation errors, etc.

• 3. Check the physical structure of the pump, whether there is any chemical reaction such as wear and cavitation corrosion.

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