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EN
This manual is the property of PIUSI S.p.A. Any reproduction, even partial, is forbidden.
translated from italian
K33-K44
7 MAINTENANCE
No ordinary maintenance is required provided that the meter K44 / K33 is properly installed and used. An
incorrect filtering on the meter inlet may block orwear out the measuring chamber, thusaffecting the meter
accuracy. Should this problem occur (see section”Problem, Causes and Solutions”) disassemble the measur-
ing chamber, as shown in section“Disassembling/Reassembling”.
WARNING
Before disassembling alwaysmake sure that all fluid is drained from the meter
and pipes connected to it.
Necessary cleaning can be carried outby means of a soft brush or small tool (i.e. a screwdriver). During
cleaning be careful not to damage the chamber orthe disk. Carefully check the meter and replace the parts
which have sufferedany possible damage. Only use theoriginal spare part kits shown in diagram1 “Exploded
view and spare part list”. A new calibration is always necessary after cleaning or replacing the meter parts.
8 DISASSEMBLING REASSEMBLING
K44 / K33 can be easily disassembled into its main parts without removing thebody from the pipes.
METER UNIT
To disassemble the meter unit operate as follows:
a. Remove the reset knob by firmly pulling it axially.
b. Loosen the 4 retaining screws (see diagram 1, pos. “7”).
c. Loosen the 2 screws (pos. “5”).
To reassemble the unit reverse the procedure described above.
RESET KNOB
To modify the reset knob position:
a. Perform only the operations a) and b) described above.
b. Take out the plug (see diagram 1,pos. “4”) by pushing it from the inside towards the outside of the cover.
c. Fix again the plug on the opposite hole by placing it inside the cover and pushing it outwards.
d. Fix again the meter cover and resetknob.
MEASURING CHAMBER
To enter the measuring chamber operate as follows:
a. Disassemble the meter unit.
b. Loosen the eight screws (see diagram 1, pos. “7”).
c. Remove the body cover (pos. “8”) together with the gear unit. During this operation be careful not to dam-
age the gasket (pos. “10”).
d. Remove the whole measuring chamber (pos. “11”) by lifting it from themeter body and at the same time pull-
ing it back towards the inlet in order toremove the O ring (pos. “16”) from its seat at the outlet. To check the
inside of the measuring chamber (pos. “15”), remove the O ring and divide the two half chambers containing
the nutating disk. Measuring chamberTo enter the measuring chamber operate as follows:
a. Disassemble the meter unit.
b. Loosen the eight screws (see diagram 1, pos. “7”).
c. Remove the body cover (pos. “8”) together with the gear unit. During this operation be careful not to dam-
age the gasket (pos. “10”).
d. Remove the whole measuring chamber (pos. “11”) by lifting it from the meter body and at the same time
pulling it back towards the inlet in order to remove the O ring (pos. “16”) from its seat at the outlet. To check
the inside of the measuring chamber (pos. “15”), remove the O ringand divide the two half chambers contain-
ing the nutating disk.
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