malfunction

cause

Method of exclusion

Pump cannot self-prime

1, Insufficient fluid or fluid in pump body

2, Leakage in suction line

3, Low speed

4, Suction lift is too high or the suction line is blocked

5, Excessive mechanical seal

1,   Add enough fluid

2,   Check and eliminate leaks

3,   Adjust the speed

4,   Reduce suction or shorten suction line

5,   Repair or replace

Insufficient pressure

1,   Impeller passage or suction line blockage

2,   Low power speed is too low

3,   Invalid inlet or outlet valve

1,   Remove blockages

2,   Increase full horsepower to speed

3,   Open the import or export valve

Pump shaft power

Too expensive to consume

1,   Excessive traffic

2,   Speed ​​is too high

3,   Pump shaft curl or impeller bump

4,   The flow path in the pump is blocked or stuck

1,   Reduce traffic

2,   Reduce appropriately

3,   Correct or replace

4,   Remove blockages

Pump noise is louder

1,   Unstable foot

2,   Cavitation

3,   Serious bearing wear

4,   The flow path in the pump is blocked or stuck

5,   There is debris in the pump or inlet pipe

6,   The spindle of the pump and the power machine are different from each other

1,   Reinforcement

2,   Adjust conditions

3,   Replace new bearing

4,   Correct or replace

5,   Remove debris

6,   Adjust the coaxiality