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6

PROBLEM

POSSIBLE CAUSE

SOLUTION

The power 
consumption 
is higher than 
expected

Reduce the flow with the delivery 
valve or change the motor

Specific gravity and viscosity above  
design

Check the fastening of the terminals. 
Check the mains voltage and make 
sure the shaft turns gently by hand

Excessive consumption

Test  pressure  the  suction  pipeline 
including the pump and observe any 
liquid leak

Air trapped in the suction line

The pump 
vibrates

Change  the  impeller,  clean  the 
impeller

Impeller  imbalanced  through 
breakage or partial obstruction

Change the operating conditions or 
the pump in the installation.

Cavitation

Eliminate  the  tension  by  loosening 
the pipeline

Tension in the pipeline

Bleed  the  air  from  the  liquid  or 
prevent it from getting into the pump

Air in the liquid

The bearing 
gets too hot

Содержание DFP

Страница 1: ...DFP Sanitary Pump Installation Operating Manual...

Страница 2: ......

Страница 3: ...SPECIFICATIONS 1 1 2 INSTALLATION 2 ELECTRICAL CONNECTIONS 3 3 OPERATION 4 4 TROUBLE SHOOTING 5 5 INDEX Davis Shirtliff Ltd 2023 Contents herein are not warranted TERMS OF WARRANTY 6 7...

Страница 4: ...ater treating systems pharmaceutical food and refining chemical industries The design features optimised hydraulics for high efficiency and polished internal finishes to prevent fouling by bacteria an...

Страница 5: ...ight The diameter must be 1 5 to 2 times the diameter of the pump s suction flange The inlet cone must be eccentric when the pump works under depression If it works under load this cone may be concent...

Страница 6: ...n negative suction it should have a suitable foot valve placed at required depth to prevent air intake The delivery piping must Be properly sealed Have proper dimensions to avoid excessive head losses...

Страница 7: ...s the fluid should overflow the system to ensure that all the air has been vented Make sure that the direction of rotation coincides with the direction of the arrow located on the pump body Centrifuga...

Страница 8: ...el Change the pump for another with less NPHSr Reduce leaks in the suction piping Air getting into suction pipe Test pressure the suction pipeline including the pump and observe any liquid leak Insuff...

Страница 9: ...nsumption Test pressure the suction pipeline including the pump and observe any liquid leak Air trapped in the suction line The pump vibrates Change the impeller clean the impeller Impeller imbalanced...

Страница 10: ...f careless handling lack of maintenance faulty installation incompetence on the part of the equipment user Acts of God or any other cause beyond the Distributors reasonable control Also any repair or...

Страница 11: ......

Страница 12: ...INS528A 03 23...

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