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Pump Troubleshooting Guide: Common Faults, Causes, and Solutions
CQF Fluoroplastic Magnetic Pump – Corrosion Resistant Chemical Pump
This guide outlines typical pump operating faults, their likely causes, and recommended corrective actions. It is designed for industrial and commercial pump users who require accurate and practical troubleshooting information.
1. Pump Does Not Deliver Water
Possible causes:
- Pump or motor running in reverse direction
- Air leakage at the suction pipeline connection
- Insufficient priming water in the pump chamber
- Voltage too high, causing coupling slip during startup
- Suction lift too high
Recommended solutions:
- Correct the motor wiring to ensure proper rotation direction
- Eliminate air leakage at the suction line
- Add sufficient priming water to the pump chamber
- Adjust the power supply voltage to rated level
- Lower the pump installation position to reduce suction lift
2. Insufficient Pump Flow
Possible causes:
- Suction pipe diameter too small
- Impeller passage blocked by debris
- Discharge head too high
- Pump rotational speed too low
Recommended solutions:
- Replace the suction pipe with a proper diameter
- Clean the impeller and remove blockages
- Fully open the discharge valve
- Restore the pump to its rated speed
3. Insufficient Pump Head (Low Pressure)
Possible causes:
- Flow rate too high
- Pump rotational speed too low
Recommended solutions:
- Partially close the discharge valve to reduce flow
- Restore the pump to its rated speed
4. Excessive Noise
Possible causes:
- Severe pump shaft wear
- Severe shaft sleeve wear
- Contact between drive magnetic cup and isolation sleeve (for magnetic drive pumps)
Recommended solutions:
- Replace the pump shaft
- Replace the shaft sleeve
- Disassemble and reassemble the pump head correctly
5. Leakage
Possible causes:
- Damaged O-ring seal
Recommended solutions:
- Replace the O-ring seal
Conclusion
Regular inspection and proper troubleshooting are essential for maintaining stable pump performance. Addressing issues such as incorrect rotation, air ingress, insufficient priming, worn components, and improper installation can greatly extend pump service life. For unresolved or complex problems, consult a qualified technician or the pump manufacturer.