GEM 687 Installation, Operating And Maintenance Instructions page 39

11.4 Actuator mounting on the valve body
1. Move actuator A to the open position.
2. Position actuator A with the mounted
diaphragm 2 on the valve body 1,
aligning the diaphragm weir and valve
body weir.
3. Insert and tighten the bolts 18, washers 19
and nuts 20 by hand (hand tight only).
4. Move actuator A to the closed position.
5. Fully tighten the bolts 18 with nuts 20
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.
Important:
Service and maintenance:
Diaphragms set in the course of
time. After valve disassembly /
assembly check that the bolts 18
and nuts 20 on the body are tight
and retighten as necessary (at the
very latest after the first sterilisation
process).
12 Commissioning
Corrosive chemicals!
® Risk of caustic burns!
Check the tightness of the
G
media connections prior to
commissioning!
Use only the appropriate
G
protective gear when
performing the tightness
check.
Protect against leakage!
Provide precautionary measures
G
against exceeding the maximum
permitted pressures caused by
pressure surges (water hammer).
Prior to cleaning or commissioning the
plant:
Check the tightness and the function of
G
the diaphragm valve (close and reopen
the diaphragm valve).
If the plant is new and after repairs rinse
G
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.
13 Inspection and servicing
The equipment is subject to pressure!
® Risk of severe injury or death!
Only work on depressurized plant.
G
Hot plant components!
® Risk of burns!
Only work on plant that has
G
cooled down.
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WARNING
CAUTION
WARNING
CAUTION
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