Flowserve VTP - Faults; Causes and Remedies; Troubleshooting Pump and Motor Issues

Page 56 of
7
7 FAUL
T
FAULT SY
M
Pump over
h

Bearings

Pump

Me
c

M




 



 
 
    
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    
VERTIC
A
7
6
T
S; CAUS
E
M
PTOM
h
eats and s
e
have short
vibrates or
i
hanical seal
M
echanical s
e
Pump requ
i

Pump lo
s

Insuff
i

Ins
u

P

 
  
 
 
  


 
 
  
 
  
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
 
  
A
L TURBIN
E
E
S AND R
E
e
izes
life
i
s noisy
has short l
i
e
al leaks ex
c
i
res excessi
v
s
es prime af
t
i
cient press
u
u
fficient cap
a
ump does n
o
POSSIBLE CA
U
Pump not su
b
Impeller not a
Suction lift to
o
Insufficient m
a
pressure and
Excessive a
m
Line check v
a
Unit running
b
Air or vapor p
Air leaks into
Intake straine
in mud or san
Inlet of suctio
n
submerged.
Speed too lo
w
Speed too hi
g
Total head of
head of pum
p
Tot a l s ys tem
h
design head.
Specific gravi
t
design.
Viscosity of li
q
Operation at
v
Operation at
h
Misalignment
Improperly d
e
fasteners.
Shaft bent.
Rotating part
Bearings wor
n
Wearing ring
s
E
PUMPS
(
V
T
E
MEDIES
i
fe
c
essively
v
e power
t
er starting
u
re develop
e
a
city delive
r
o
t deliver liq
U
SES
b
merged.
djusted or loose
o
high or level to
o
a
rgin between s
u
vapor pressure.
m
ount of air or ga
a
lve backward/st
u
b
ackwards.
ocket in suction
suction line.
r or impeller plu
g
d.
n
pipe insufficie
n
w
.
g
h.
system higher t
h
p
.
h
ead is lower th
a
t
y of liquid differ
e
q
uid differs from
v
ery low capacit
y
h
igh capacity.
due to pipe stra
i
e
signed foundati
o
rubbing on stati
o
n
.
s
urfaces worn.
T
PS
)
CENTR
I
e
d
r
ed
uid
P
O
A
. SY
S
on shaft.
o
low.
u
ction
s in liquid.
u
ck.
line.
g
ged or pump
n
tly
h
an differential
a
n pump
e
nt from
the designed.
y
.
B. MECH
A
i
n.
o
n./Loose
o
nary part.
IFUGAL PU
M
O
SSIBLE REM
E
S
TEM PROBLE
M
Check requirem
See PART/2-Se
c
Check NPSHa>
strainers/fittings
Check and purg
Reverse chuck
v
See start up ins
t
Check suction li
Check suction
p
Start and stop s
e
available to bac
k
Check out syst
e
Consult Flowse
r
Consult Flowse
r
Check system l
o
Check and con
s
Check the pum
p
handled. Consu
l
Measure. Chec
k
Measure value
a
Flowserve.
A
NICAL PROB
L
Check the flang
e
elastic coupling
s
Check setting o
f
required. Check
Check shaft run
Check. Consult
Replace bearin
g
Replace worn
w
M
PS ENGLI
S
E
DIES
M
S
ents/liquid level.
ction A7 for pro
p
NPSHr, proper
s
.
e pipes and sys
t
v
alve /free the v
a
t
ruction. Check
m
ne design for va
p
p
ipe is airtight.
e
veral times or
u
k
flush or pull pu
e
m design.
r
ve.
r
ve.
o
sses o
r
consult
s
ult Flowserve.
p
design for the t
lt Flowserve.
k
minimum perm
a
nd check maxi
m
L
EMS
e
connections a
n
s
or a method p
e
f
base plate. Tig
h
k
fasteners and t
o
outs. Consult Fl
Flowserve, if ne
c
g
s.
w
ear ring/surface
s
S
H 7156922
4
flows
e
Vent and/or pri
m
p
er impeller adju
s
s
ubmergence, lo
s
t
em.
a
lve.
m
otor phase/wiri
n
por pockets.
u
se line pressur
e
mp to clean.
Flowserve.
ype of liquid to
b
itted. Consult Fl
m
um permitted.
n
d eliminate stra
e
rmitted.
h
ten, adjust, gro
u
o
rque.
owserve.
c
essary.
s
.
4
– 02-15
e
rve.com
m
e.
s
tment.
s
ses at
n
g
e
if
b
e
l
owserve.
Consult
ins using
u
t base as