Zhongkai double suction centrifugal pump is mainly suitable for conveying liquids in water plants, air conditioning circulating water, building water supply, irrigation, drainage pump stations, power stations, industrial water supply systems, fire protection systems, shipbuilding industry and other occasions. Below, the editor will take you to understand the possible faults and troubleshooting methods that may occur when using a double suction centrifugal pump with a middle opening.

Fault:

1. The water pump does not absorb water, and the pointers of the pressure gauge and vacuum gauge jump violently

Cause: a. Insufficient water injection into the water pump. Solution: a. Inject water into the water pump again

Cause: b. Leakage in the inlet pipe and instrument. Troubleshooting method: b. Tighten and block the leakage area

2. The water pump does not absorb water, and the vacuum gauge shows high vacuum

Cause: a. Bottom valve not open or blocked. Solution: a. Leveling or replacing the bottom valve

Cause: b. Excessive resistance in the suction pipe. Exclusion method: b. Cleaning or replacing the suction pipe
Cause: c. Excessive water absorption height. Solution: c. Reduce water absorption height

3. The pressure gauge has pressure, but the water pump still does not produce water

Cause: a. Excessive resistance in the water outlet pipe. Solution: a. Cleaning or shortening the water pipe

Cause: b. Incorrect rotation direction. Exclusion method: b. Check the motor rotation direction
Cause: c. Impeller blockage removal method: c. Cleaning the impeller
Cause: d. Insufficient water pump speed. Solution: d. Increase water pump speed

4. Flow rate below design requirements

Cause: a. Impeller or pipeline blockage. Troubleshooting method: a. Cleaning the impeller and pipeline

Cause: b. Excessive wear of sealing ring or impeller. Solution: b. Replace damaged parts
Cause: c. Insufficient speed. Exclusion method: c. Adjust to rated speed

5. The power consumption of the water pump is too high

Cause: a. The packing gland is too tight, and the packing box heats up. Solution: a. Loosen the packing gland

Cause: b. Friction between impeller and sealing ring. Elimination method: b. Eliminating mechanical friction
Cause: c. Excessive flow. Solution: c. Turn down the outlet valve

6. The internal sound of the water pump is abnormal, and the water pump cannot suction water

Cause: a. Excessive resistance inside the suction pipe. Solution: a. Reduce the suction height and shorten the length of the suction pipe

Cause: B. Air leakage in the suction pipe. Solution: B. Block the leakage area
Cause: c. Excessive flow causing cavitation. Elimination method: c. Adjust the outlet valve to ensure that the pump is used within the specified operating range

7. Pump vibration

Cause: a. Pump cavitation, impeller imbalance. Elimination method: a. Eliminating cavitation, impeller balancing

Cause: b. The pump shaft and motor are not on the same centerline. Exclusion method: b. Check the coaxiality of the water pump and motor
Cause: c. Loosening of foundation bolts. Solution: c. Tightening foundation bolts

8. Bearing overheating

Causes: a. Insufficient or excessive lubricating oil, or deterioration. Elimination methods: a. Check the oil level, clean the bearings, and replace the oil

Cause: B. The water pump and motor shaft are not concentric. Exclusion method: B. Align the shaft centerline