50FP-22 plastic centrifugal pump failure and troubleshooting

Plastic centrifugal pump failure forms and solutions:

Failure form

cause

Method of exclusion

No liquid pump

Pump reversal
Intake pipeline leaks
Pump chamber too little liquid
Suction stroke is too high
Bottom valve leaks
Impeller blocked not turn
 

Change the motor wiring
To prevent leakage
Increase the amount of fluid
Lower the pump installation position
Clean the bottom valve
Clean pump housing, impeller
 

Insufficient traffic

Inhalation diameter is too small
Impeller runner blocked
Head too high
Suction pipe air leak into
Impeller damage
 

Exchange liquid inlet
Clean the impeller
Open a large liquid valve
To prevent leakage
Replace the impeller
 

Low head

Too much traffic
Speed ​​is too low
 

Off small outlet valve
Restore rated speed
 

The noise is too low

Pump debris
The rotating parts rub against the fixing parts
Serious shaft wear
 

Check clean up
Adjust the gap
Replace pump shaft
 

Leakage

Pump housing fixing screw loose
Severe mechanical seal wear
 

Tighten the screw
Replace the mechanical seal
 

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