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

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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