Watson-Marlow SPS - Manual (Page 34)

MasoSine SPS sinusoidal pumps User Manual 34
Error Cause Remedy
Severe wear
after short
operating
time
Solids in the pumped fluid
Change the wearing parts
frequently; check material
compatibility
Pumped fluid is abrasive
Choose larger pump, reduce
speed
Rotor has
wear on one
side
Rotor not tightened correctly
on installation Tighten shaft nut firmly on
block
Adjusting dimensions changed
after working on the bearing
housing
Check and correct dimension X:
SPS 200 = 17.5 mm +0.1~
SPS 250 = 17.4 mm +0.1
SPS 300 = 23.0 mm +0.1
SPS 400 = 15.0 mm +0.1
SPS 500 = 25.4 mm +0.1
See 21 Adjusting the shaft
Pump not
clean after
CIP cleaning Cleaning regulation not
complied with. See 17
Cleaning Choke on the pressure side:
Check that the pressure
difference is 3-4 bar
Rotor has
seized on
liner Rotor not correctly tightened Tighten shaft nut firmly on block
Temperature too high
(thermal expansion) Choose liner with larger
tolerances
Flushing
mate-
rial between
housing and
power frame
leaking
O-ring in the power frame
missing or defective
Install or replace O-ring
Water or
pumped
material in
the bearing
housing
Flushing pressure too high
Flushing must be pressure-
less (attach pressure reducer,
maximum 0.1 bar)
Leakage bores—bore holes
in the power frame where
pumped material can escape if
the seal system leaks—
blocked (see graphic on page
32)
Check leakage bores for free
passage, replace shaft seals on
pump and power frame
Front
Support has
seized on
Rotor
O-ring in the front bearing
missing or worn
Install or replace O-ring
Front bearing wrongly installed
Examine front bearing for
damage and install in correct
position
Product is
leaking from
the bear-
ing housing
openings
Sealing system in the pump is
leaking
Inspect and if necessary
replace the sealing system and
clean the rinsing channels in
the power frame
Pump
assembly
subject to
vibrations
Speed of the drive motor is
too high Lower the speed of the drive
motor
Smells
and smoke
coming from
the pump
Pump is running dry
Stop the pump immediately.
Check inner parts for damage
and replace if necessary
Corrosion Corrosion occurs
Eliminate corrosion;
lacquer or use spray oil