12 Servicing
12.3 Cleaning the strainer
12.3 Cleaning the strainer
The frequency of cleaning the filter depends on the degree of soiling of the pumped liquid. In case of
strongly soiled strainers cavitation and strong noise generation arise. The suction-side pressure gauge
is used to indicate the degree of soiling.
Personnel qualification:
o
Trained personnel
Personal protective equipment:
o
Work clothing
o
Face protection
o
Protective gloves
o
Safety boots
Aids:
o
Collection tank
o
Solvent
WARNING
Risk of injury through emitted pumped liquid.
Pumped liquids can be hot, poisonous, combustible and caustic.
► Wear personal protective clothing during all the work. Ensure face protection.
► Collect any discharging pumped liquid safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
► If work on the blocked part of the pump station takes longer, monitor the filling level of the strainer
housing and catch the leakage.
WARNING
Risk of injury through emitted pumped liquid when working on the pump station without previ-
ous pressure relief.
► Open the screw plug of the vent hole by a max. of 2 rotations in order to reduce the internal pres-
sure in the housing.
4
1
3
6
5
2
1.
Switch over the lever of the reversing valve
1
in order to shut off the respective side
2.
Remove the cap nuts
2
, then remove the strainer cover
3
and O-ring
4
.
3.
Remove the conical spring
5
and the strainer insert
6
from the strainer chamber.
4.
Clean the strainer insert, for example by washing it in a solvent.
5.
Reinsert the strainer insert and conical spring.
6.
Place the strainer cover with O-ring and tighten with cap nuts.
7.
Place the reversing valve lever in the desired position.
28
OID 06en-GB Edition 2019-11
Operating instructions
