12.4 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 loose seal compression
in the course of time. After valve
assembly / disassembly check that
the bolts and nuts on the body are
tight and retighten as necessary
(at the very latest after the fi rst
sterilisation process). Bolt tightness
/ valve sealing should be checked
on a regular basis and points 6-7 of
chapter 12.4 should be repeated.
13 Commissioning
WARNING
Protect against leakage!
Provide precautionary measures
G
against exceeding the maximum
permitted pressures caused by
pressure surges (water hammer).
687_us
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.
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.
14 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.
32 / 40
WARNING
WARNING
WARNING