Omega
37
Trouble--shooting Table
Pum
p
pressure
too
low
Pum
p
pressure
too
high
Flow
rate
too
high
Flow
rate
too
low
Pow
er
consum
ption
too
high
P
um
p
fa
ils
to
pum
p
liqui
d
af
ter
bei
ng
sw
itc
hed
on
Pum
p
ceases
to
pum
p
liquid
Pum
p
does
not
run
sm
oothly
(noise,
vibrations)
Inadm
issible
tem
perature
increase
at
pum
p
/
seal
casing
Bearing
tem
perature
too
high
Exessive
leakage
at
shaft
seal
D
rive
overloaded
Leakage
at
pum
p
Cause
Remedy
1
)
F
F
Higher density or viscosity
of medium handled than
specified in the order
Reduce speed
In the case of persistent overloading, turn
down impeller, if necessary
1
)
.
F
F
F
F
F
Speed too high
Reduce speed
In the case of persistent overloading, turn
down impeller, if necessary
1
)
.
F
Tie bolts / seals
Check
Tighten tie bolts
Replace gaskets
Check pipe connections and pump moun-
ting, if necessary, improve mounting of pi-
ping.
F
Worn shaft seal
Check flushing / sealing liquid pressure
clean sealing liquid line, possibly introduce
sealing liquid from an external source or
increase pressure
Replace shaft seal
Replace worn components
Replace shaft protecting sleeve.
F
F
F
F
Unfavourable flow to suc-
tion nozzle of pump
Alter piping
If necessary, alter intake pipe if resistances
are too high
Check whether pipe routing results in twi-
sted or irregular flow (e.g. downstream of
an elbow) and correct, if necessary.
1
) Consult KSB
