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7.General Failure and the methods to get rid

Failure

Causes

Remedies

 

No water

discharmng

 

 

1Pump is not full ofwater

2Air leakage exists in the inlet pipe or in the sealing part

3Revolution direction reversed

4Length of inlet pipe is too long

5Suction lift is too high

1Fill water into pump till full

2Repair the inlet piperemedy

The leakage

3Cheek and correct

4Shorten the inlet pipe

5Lower the suction lift

 

 

 

Less flow

 

 

1Impeller blocked

2Excessive wear-down in way of the sealing ring/Excessive clearance

3The liftis toohigh

4Air leakage exists in the inlet pipe

5Suction lift is to highLocal vapour etching appears

1Clear the blockage

2Replace the sealing ring

3Lowerthe lift

4Repair the inlet pipe

5Lowertheposition of the pump or shorten the inlet pipe