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A.0100.301 – IM-FIP/08.00 EN (02/2014)
Problem 4
Vanes permanently and excessively curved.
Causes
Long term storage in pump. Normal end of useful life.
(Especially for Nitrile impellers.)
Precautions
Always remove the impeller for long term storage.
Keep it in a dark and cool place. Refit the impeller to
rotate in opposite direction.
Problem 5
Worn vane tips and faces. Worn impeller drive.
Causes
Abrasive wear from pump or fluid. Worn impeller drive
can also be due to excessive pressure.
Precautions
Pump should continue to operate satisfactorily in
worn condition. Replace severely worn pump parts.
Reduce the pump speed to prolong the service life.
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