Flowserve IDP CPXV - Manual (Page 33)

CPXV and CPXRV USER INSTRUCTIONS ENGLISH 71569193 09-14
Page 33 of 48
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FAULT SYMPTOM
P u m p o v e r h e a t s 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
 P u m p v i 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 v e l y
 P u m p r e q u i r e s e x c e s s i v e p o w e r
 P u m p l o s e s p r i m e a f t e r s t a 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 p a 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 v e r l i q u i d
 POSSIBLE CAUSES POSSIBLE REMEDIES
 
Internal misalignment of parts preventing seal ring
and seat from mating properly.
  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.
 
Improper installation of bearings (damage during
assembly, incorrect assembly, wrong type of
bearing etc).
Check method of assembly, possible damage or
state of cleanliness during assembly and type of
bearing used. Remedy or CONSULT
FLOWSERVE, if necessary.
  Damaged bearings due to contamination.
Check contamination source and replace damaged
bearings.
C. MOTOR ELECTRICAL PROBLEMS
    Wrong direction of rotation. Reverse 2 phases at motor terminal box.
  Motor running on 2 phases only. Check supply and fuses.
   Motor running too slow. Check motor terminal box connections and voltage.