WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
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FAULT SYMPTOM
Pu m p o v e rh e a ts a n d s e i z e s
B e a ri n g s h a v e s h o rt l i f e
Pu m p v i b ra t e s o r i s n o i s y
M e c h a n i c a l s e a l h a s s h o rt l i f e
M e c h a n i c a l s e a l l e a k s e x c e s s i v e l y
Pu m p r e q u i re s e x c e s s i v e p o w e r
Pu m p l o s e s p ri m e a ft e r s ta rt i n g
I n s u f f i c i e n t p r e s s u r e d e v e l o p e d
I n s u f f i c i e n t c a pa c i t y d e l i v e r e d
Pu m p d o e s n o t d e l i v e r l i q u i d
PROBABLE CAUSES
POSSIBLE REMEDIES
Foot valve too small.
Investigate replacing the foot valve.
Foot valve partially clogged.
Clean foot valve.
Inlet of suction pipe insufficiently
submerged.
Check out system design.
Speed too low.
CONSULT FLOWSERVE.
Speed too high.
CONSULT FLOWSERVE.
Total head of system higher than
differential head of pump.
Check system losses.
Remedy or CONSULT FLOWSERVE.
Total head of system lower than pump
design head.
Specific gravity of liquid different from
design.
Check and CONSULT FLOWSERVE.
Viscosity of liquid differs from that for
which designed.
Operation at very low capacity.
Measure value and check minimum
permitted.
Remedy or CONSULT FLOWSERVE.
Operation at high capacity.
Measure value and check maximum
permitted.
Remedy or CONSULT FLOWSERVE.
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.