Alfa Laval LKH - Trouble shooting

4 Operation
Pay attention to possible faults.
Read the instructions carefully.
4.2 Trouble shooting
N
N
O
O
T
T
E
E
!
!
Read the maintenance instructions carefully before replacing worn parts.
P
P
r
r
o
o
b
b
l
l
e
e
m
m
C
C
a
a
u
u
s
s
e
e
/
/
r
r
e
e
s
s
u
u
l
l
t
t
R
R
e
e
m
m
e
e
d
d
y
y
Motor overloaded - Pumping of viscous liquids - Larger motor or smaller impeller
- Pumping of high density liquids
- Low outlet pressure (counter pressure) - Higher coun ter pressure (throttling)
- Lamination of precipitates from the
liquid
- Frequent cleaning
Cavitation:
- Damage - Low inlet pressure - Increase the inlet pressure
- Pressure reduction (sometimes to
zero)
- High liquid temperature - Reduce the liquid temperature
- Increase in the noise level - Reduce the pressure drop before the
pump
- Reduce speed
Leaking shaft seal - Running dry Replace:
All w earing parts
- Incorrect rubber grade If necessary:
- Change rubber grade
- Abrasive particles in the liquid
- Select stationary and rotating seal ring
in silicon carbide/silicon carbide
Leaking O-ring seals
Incorrect rubber grade
Change rub ber grade
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