GEM 651 - Actuator Mounting on the Valve Body; 12 Commissioning

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651
7. Screw diaphragm face tightly into the
compressor manually. The diaphragm
boss must fi t closely in the recess of the
compressor.
Diaphragm boss
Recess of compressor
Com-
pressor
Adapter
Backing
diaphragm
Diaphragm face
Diaphragm pin
8. If it is diffi cult to screw it in, check the
thread, replace damaged parts.
9. When clear resistance is felt turn back
the diaphragm anticlockwise until its bolt
holes are in correct alignment with the
bolt holes of the actuator.
10. Press the diaphragm face tightly onto
the backing diaphragm manually so that
it returns to its original shape and fi ts
closely on the backing diaphragm.
11.4 Actuator mounting
on the valve body
1. Move actuator A to the open position.
2. Position bonnet A with the mounted
diaphragm 2 on the valve body 1, take
care to align the compressor weir and
valve body weir.
3. Insert and tighten the bolts 18 with
washers 19 by hand (hand tight only).
4. Move actuator A to the closed position.
5. Fully tighten the bolts 18 diagonally.
6. Ensure that the diaphragm 2 is
compressed evenly (approx. 10-15 %,
visible by an even bulge to the outside).
7. Check tightness of completely
assembled valve.
12 Commissioning
WARNING
Corrosive chemicals!
® Risk of caustic burns!
G Check the tightness of the
media connections prior to
commissioning!
G Use only the appropriate
protective gear when
performing the tightness
check.
CAUTION
Protect against leakage!
G Provide precautionary measures
against exceeding the maximum
permitted pressures caused by
pressure surges (water hammer).
Prior to cleaning or commissioning the
plant:
G Check the tightness and the function of
the diaphragm valve (close and reopen
the diaphragm valve).
G If the plant is new and after repairs rinse
the piping system with a fully opened
diaphragm valve (to remove any harmful
foreign matter).
Cleaning:
 The plant operator is responsible for
selecting the cleaning material and
performing the procedure.
Important:
Service and maintenance:
Diaphragms degrade in the course
of time. After valve disassembly /
assembly check that the bolts 18
on the body are tight and retighten
as necessary (at the very latest
after the fi rst sterilisation process).