Flowserve CPXPM Manual do Utilizador descarregar pdf (Página 25)

CPXPM USER INSTRUCTIONS ENGLISH 71569160 09-09

Page 25 of 28 flowserve.com

FAULT SYMPTOM

Pump overheats and seizes

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Bearings have sh ort life

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Pump vibrates or is noisy

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Mechanical seal has short life

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Mechanical seal leaks excessivel y

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Pump requires excessive power

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Pump does not s elf prime

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Insufficient pressure dev eloped

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Insufficient capaci t y delivered

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Pump does not deliver liquid

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PROBABLE CAUSES POSSIBLE REMEDIES

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Impeller damaged or eroded.

Replace or CONSULT FLOWSERVE for improved

material selection.

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Stubshaft worn or scored or running off centre. Check and renew defective parts.

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Mechanical seal improperly installed.

Check alignment of faces or damaged parts and

assembly method used.

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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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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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Flowserve CPXPM Manual do Utilizador Página 25

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