KRAL DKC Series - Cleaning the strainer

12 Servicing
12.5 Cleaning the strainer
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Fig.24: Replacing the pump
1. Switch over the lever of the reversing valve11 in order to shut off the respective side Ä During
operation,Page34.
2. Open the screw plug of the vent hole1 by a max. of two rotations in order to reduce the internal
pressure in the housing.
3. Remove the screw plug9 in order to drain the liquid in the strainer chamber.
4. Remove the hexagon nuts5 at the pump flange.
5. Dismantle the pump6, remove the flat gaskets2 and7.
6. Clean the sealing surfaces, place on new flat gaskets.
7. Place the new pump on the stud screws8, tighten the hexagon nuts5.
8. Tighten the screw plug9 at the station block again.
9. Fill and vent the strainer chamber Ä Commissioning,Page30.
12.5 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
Operating instructions
OID 02en-GB Edition 2019-11
41