Flowserve FRBH Instrukcja Użytkownika Pobierz pdf (Strona 43)

FRBH, FRBHX AND FRBHS USER INSTRUCTIONS ENGLISH 71569178 10-04

Page 43 of 54

FAULT SYMPTOM

Pump overheats and seizes

⇓⇓

Bearings have short life

⇓⇓

Pump vibrates or is noisy

⇓⇓

Mechanical seal has short life

⇓⇓

Mechanical seal leaks excessively

⇓⇓

Pump requires excessive power

⇓⇓

Pump loses prime after starting

⇓⇓

Insufficient pressure developed

⇓⇓

Insufficient capacity delivered

⇓⇓

Pump does not deliver liquid

⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES

B. Mechanical troubles

Misalignment due to pipe strain. Check the flange connections and eliminate strains

using elastic couplings or a method permitted.

Improperly designed foundation. Check setting of baseplate: tighten, adjust, grout

base as required.

Shaft bent. Check shaft runouts are within acceptable values.

CONSULT FLOWSERVE.

Rotating part rubbing on stationary part internally. Check and CONSULT FLOWSERVE, if necessary.

Bearings worn Replace bearings.

Wearing ring surfaces worn. Replace worn wear ring/surfaces.

Impeller damaged or eroded. Replace or CONSULT FLOWSERVE for improved

material selection.

Leakage under sleeve due to joint failure. Replace joint and check for damage.

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

Mechanical seal improperly installed. Check alignment of faces or damaged parts and

assembly method used.

Incorrect type of mechanical seal for operating

conditions.

CONSULT FLOWSERVE.

Shaft running off centre because of worn bearings

or misalignment.

Check misalignment and correct if necessary. If

alignment satisfactory check bearings for excessive

wear.

Impeller out of balance resulting in vibration.

Abrasive solids in liquid pumped.

Internal misalignment of parts preventing seal ring

and seat from mating properly.

Check and CONSULT FLOWSERVE.

Mechanical seal was run dry. Check mechanical seal condition and source of dry

running and repair.

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.

Excessive thrust caused by a mechanical failure

inside the pump.

Check wear condition of impeller, its clearances and

liquid passages.

Excessive grease in ball bearings. Check method of regreasing.

Lack of lubrication for bearings. Check hours run since last change of lubricant, the

schedule and its basis.

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