1、 Self suction pump does not produce water
Reason:
1. No or insufficient liquid storage inside the pump casing
2. Air leakage in the suction pipeline
3. The speed is too low
4. The suction distance is too high or the suction pipeline is too long
5. Excessive leakage of mechanical seal
6. The gas in the suction pipeline cannot be discharged from the outlet
terms of settlement:
1. Add sufficient fluid storage
2. Check and eliminate any air leaks
3. Adjust the speed
4. Reduce suction or shorten the suction line
5. Repair or replace
6. Let it be expelled
2、 The self-priming pump has significant noise and vibration
Reason:
1. Unstable footing
2. Pump shaft bending
3. Cavitation phenomenon
4. Severe bearing wear
5. There are impurities in the inlet pipeline
6. The main shafts of the pump and motor are not concentric
terms of settlement:
1. Reinforcement
2. Replace or calibrate
3. Adjust working conditions
4. Replace
5. Remove debris
6. Adjust coaxiality
3、 Insufficient water output of self-priming pump
Reason:
1. The impeller passage and suction pipe are blocked
2. Severe wear of impeller or impeller seal
3. Insufficient power or too low speed
terms of settlement:
1. Remove blockages
2. Replace the mouth ring
3. Add sufficient power and adjust to rated speed
4、 Excessive power consumption of self-priming pump shaft
Reason:
1. Excessive traffic
2. The speed is too high
3. Bending of pump shaft or collision of impeller
4. The flow channel inside the pump is blocked or stuck
terms of settlement:
1. Raise export pressure
2. Reduce appropriately
3. Replace or calibrate
4. Remove blockages