FRBH, FRBHX AND FRBHS USER INSTRUCTIONS ENGLISH 71569178 20-08
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FAULT SYMPTOM
P u mp o v er h e at s an d s ei z es
B e ar i n g s h av e s h o r t l i f e
P u mp v i b r at e s o r i s n o i sy
M ech an i c al s e al h a s sh o r t l i f e
M ech an i c al s e al l e ak s e xc e s si v e l y
P u mp r eq u i r e s ex c es s i v e p o w er
P u mp l o s e s p r i m e af t er s t ar t i n g
I n su f f i ci en t p r es su r e d ev e l o p ed
I n su f f i ci en t c ap a ci t y d el i v er ed
P u mp d o e s n o t d el i v er l i q u i d
PROBABLE CAUSES
POSSIBLE REMEDIES
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Misalignment due to pipe strain.
Check the flange connections and eliminate strains
using elastic couplings or a method permitted.
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Improperly designed foundation.
Check setting of baseplate: tighten, adjust, grout
base as required.
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Shaft bent.
Check shaft runouts are within acceptable values.
CONSULT FLOWSERVE.
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Rotating part rubbing on stationary part internally.
Check and CONSULT FLOWSERVE, if necessary.
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Bearings worn
Replace bearings.
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Wearing ring surfaces worn.
Replace worn wear ring/surfaces.
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Impeller damaged or eroded.
Replace or CONSULT FLOWSERVE for improved
material selection.
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Leakage under sleeve due to joint failure.
Replace joint and check for damage.
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Shaft sleeve 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.
Check and CONSULT FLOWSERVE.
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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.
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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.