Flowserve BP - Manual (Page 38)

BP USER INSTRUCTIONS ENGLISH 85392725 10-09 (E)
Page 38 of 44 flowserve.com
FAULT SYMPTOM
P u m p o ve r h e a ts a n d s e i z e s
B e a r i n g s h a v e s h o r t l i f e o r a r e d a m a g e d
P u m p vi b r a 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 r t 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 ve l y
P u m p r e q u i r e s e x c e s s i ve p ow e r
P u m p l o s e s p r i m e a ft e r s ta r t 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
P u m p d o e s n o t d e l i ve r l i q u i d
PROBABLE CAUSES PROBABLE REMEDIES
B. Mechanical troubles
● ● ● ● ● ●
Misalignment due to pipe strain.
Check the flange connection 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.
● ● ● ●
Foreign materials enter into clearance
between rotating part and stationary part.
Remove foreign materials.
Check and CONSULT FLOWSERVE, if
necessary.
● ● ● ● ●
Bearings worn Replace bearings.
● ● ●
Wearing ring surfaces worn. Replace worn wear ring/surfaces.
● ●
Impeller passage partially clogged. Clean impeller.
● ● ●
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
center.
Check and renew defective parts.
● ● ●
Mechanical seal improperly installed.
Check alignment of face or damaged parts and
assembly method used.
● ● ●
Incorrect type of mechanical seal for
operating conditions.
CONSULT FLOWSERVE.
● ● ● ● ●
Shaft running off center 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.