Flowserve CPXVC Bedienungsanleitung PDF herunterladen (Seite 26)

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Page 26 of 32 flowserve.com

FAULT SYMPTOM

Pump overhea ts and s eizes

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Bearings have short life

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Pump vibrates or is nois y

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Mechanical seal has shor t life

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Mechanical seal leaks excessively

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Pump requires excessive power

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Pump loses prime after starting

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Insufficient pressure developed

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Insufficient capacit y delivered

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Pump does not deliver liq uid

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PROBABLE CAUSES POSSIBLE REMEDIES

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Incorrect type of mechanical seal for operating

conditions.

CONSULT FLOWSERVE.

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Shaft running off centre because of worn bearings

or misalignment.

Check misalignment and correct if necessary. If

alignment satisfactory check bearings for excessive

wear.

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Impeller out of balance resulting in vibration.

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Abrasive solids in liquid pumped.

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Internal misalignment of parts preventing seal ring

and seat from mating properly.

Check and CONSULT FLOWSERVE.

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Mechanical seal was run dry.

Check mechanical seal condition and source of dry

running and repair.

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Internal misalignment due to improper repairs

causing impeller to rub.

Check method of assembly, possible damage or

state of cleanliness during assembly.

Remedy or CONSULT FLOWSERVE, if necessary.

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Excessive thrust caused by a mechanical failure

inside the pump.

Check wear condition of impeller, its clearances and

liquid passages.

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Excessive grease in ball bearings. Check method of regreasing.

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Lack of lubrication for bearings.

Check hours run since last change of lubricant, the

schedule and its basis.

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Improper installation of bearings (damage during

assembly, incorrect assembly, wrong type of

bearing etc).

Check method of assembly, possible damage or

state of cleanliness during assembly and type of

bearing used. Remedy or CONSULT

FLOWSERVE, if necessary.

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Damaged bearings due to contamination.

Check contamination source and replace damaged

bearings.

C. MOTOR ELECTRICAL PROBLEMS

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Wrong direction of rotation. Reverse 2 phases at motor terminal box.

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Motor running on 2 phases only. Check supply and fuses.

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Motor running too slow. Check motor terminal box connections and voltage.

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