Self-priming pump troubleshooting and use

(A). Self-priming pump before the start of the preparation and inspection work:

1. This series of self-priming pump, according to the working conditions of the pump, respectively, using high-quality calcium-based butter and oil No. 10 for lubrication, if the pump with butter lubrication should be regularly filled with grease into the bearing box, the use of oil-lubricated pumps, If the oil level is insufficient, add enough.

2. Check whether the liquid in the pump casing is higher than the upper edge of the impeller. If it is not enough, you can directly inject the liquid into the pump body from the liquid inlet of the pump casing, and should not start running when there is not enough liquid. Pump does not work, and easy to damage the mechanical seal.

3. Check the rotating parts of the pump is stuck bump phenomenon.

4. Check the pump foot and the joints at the nut loose or not.

5. Check the coaxiality or parallelism of the pump shaft and the motor shaft.

6. Check whether the imported pipeline leakage, if leaks, we must try to rule out.

7. Open the suction line valve, slightly open (do not open) the outlet control valve.

(B). Self-priming pump to stop the pump 1. First, you must close the discharge valve on the pipeline.

2. Stop the pump.

3. In the cold season, the pump body should be stored in the liquid storage tank and the water cooling chamber to prevent cracking parts.

Self-priming pump failure causes and solutions Faults cause of the problem Remedy No self-priming pump oil 1. Pump casing without liquid or liquid storage inadequate 2. Suction pipe leakage 3. Rotation speed is too low 4. Suction is too high or Suction pipe is too long 5. The mechanical seal leakage is too large 6. The suction pipe gas can not be discharged from the outlet 1. Add enough storage 2. Check and eliminate air leakage 3. Adjust the speed 4. Reduce the suction or shorten the suction pipe 5. Repair or replacement 6. To make noise and vibration larger 1. Feet unstable 2. Pump shaft bending 3. Cavitation 4. Bearing wear 5. In and out of the pipeline there are debris 6. Pump and motor The two spindle is not the heart 1. Reinforcement 2. Replacement or calibration 3. Adjustment conditions 4. Replacement 5. Removal of debris 6. Adjust the coaxiality Out of oil 1. Impeller runner and suction pipe is blocked 2. Impeller or Impeller seal wear and tear 3. Insufficient power or speed is too low 1. To exclude blockage 2. To replace the mouth ring 3. Add enough power to adjust the rated speed shaft power consumption is too large 1. Flow is too large 2. Speed ​​is too high 3. Pump Axis bending or impeller card touch 4. Pump flow blockage or stuck 1. Raise outlet pressure 2. Properly reduce 3. Replace or correct 4. Line up blockage

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