Page 56 of 7
7 FAULT
FAULT SYM
P u m p o ve r h
B e a r i n g s
P u m p
M e c
M
VERTICA
76
TS; CAUSE
MPTOM
h e a t s a n d s e
h a v e s h o r t
vi b r a t e s o r i
h a n i c a l s e a l
M e c h a n i c a l s e
P u m p r e q u i
P u m p l o s
I n s u f f i
I n s u
P
AL TURBINE
ES AND RE
e i z e s
l i f e
i s n o i s y
h a s s h o r t l i
e a l l e a k s e x c
i r e s e x c e s s i v
s e s p r i m e a f t
i c i e n t p r e s s u
u f f i c i e n t c a p a
u m p d o e s n o
POSSIBLE CAU
Pump not sub
Impeller not a
Suction lift too
Insufficient ma
pressure and
Excessive am
Line check va
Unit running b
Air or vapor p
Air leaks into
Intake straine
in mud or san
Inlet of suction
submerged.
Speed too low
Speed too hig
Total head of
head of pump
Total system h
design head.
Specific gravit
design.
Viscosity of liq
Operation at v
Operation at h
Misalignment
Improperly de
fasteners.
Shaft bent.
Rotating part
Bearings worn
Wearing ring s
E PUMPS (VT
EMEDIES
i f e
c e s s i ve l y
ve p o w e r
t e r s t a r t i n g
u r e d e v e l o p e
a c i t y d e l i v e r
o t d e l i ve r l i q
USES
bmerged.
djusted or loose
o high or level too
argin between su
vapor pressure.
mount of air or ga
alve backward/stu
backwards.
ocket in suction
suction line.
r or impeller plug
d.
n pipe insufficien
w.
gh.
system higher th
p.
head is lower tha
ty of liquid differe
quid differs from
very low capacity
high capacity.
due to pipe strai
esigned foundatio
rubbing on statio
n.
surfaces worn.
TPS) CENTRI
e d
r e d
u i d
PO
A. SYS
on shaft.
o low.
uction
s in liquid.
uck.
line.
gged or pump
ntly
han differential
an pump
ent from
the designed.
y.
B. MECHA
in.
on./Loose
onary part.
IFUGAL PUM
OSSIBLE REME
STEM PROBLEM
Check requirem
See PART/2-Sec
Check NPSHa>
strainers/fittings
Check and purg
Reverse chuck v
See start up inst
Check suction li
Check suction p
Start and stop se
available to back
Check out syste
Consult Flowser
Consult Flowser
Check system lo
Check and cons
Check the pump
handled. Consul
Measure. Check
Measure value a
Flowserve.
ANICAL PROBL
Check the flange
elastic couplings
Check setting of
required. Check
Check shaft run
Check. Consult
Replace bearing
Replace worn w
MPS ENGLIS
EDIES
MS
ents/liquid level.
ction A7 for prop
NPSHr, proper s
.
e pipes and syst
valve /free the va
truction. Check m
ne design for vap
pipe is airtight.
everal times or u
k flush or pull pu
em design.
rve.
rve.
osses or consult
sult Flowserve.
p design for the t
lt Flowserve.
k minimum perm
and check maxim
LEMS
e connections an
s or a method pe
f base plate. Tigh
k fasteners and to
outs. Consult Fl
Flowserve, if nec
gs.
wear ring/surfaces
SH 71569224
flowse
Vent and/or prim
per impeller adjus
submergence, los
tem.
alve.
motor phase/wirin
por pockets.
use line pressure
mp to clean.
Flowserve.
ype of liquid to b
itted. Consult Fl
mum permitted.
nd eliminate stra
ermitted.
hten, adjust, grou
orque.
owserve.
cessary.
s.
4
– 02-15
erve.com
me.
stment.
sses at
ng
e if
be
lowserve.
Consult
ins using
ut base as