Actuator Mounting On The Valve Body; Commissioning; Inspection And Servicing - Gemü 625 Original Einbau- Und Montageanleitung

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.
3. Tighten the bolts 18 with washers 19 or
nuts (only with B, M and T bodies) with
washers 19 by hand (hand tight only).
4. Move actuator A to the closed position.
5. Fully tighten the bolts 18 or nuts (only
with B, M and T bodies) 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 degrade in the course
of time. After valve disassembly /
assembly check that the bolts 18
and nuts (only with B, M and T
bodies) on the body are tight and
retighten as necessary (at the very
latest after the first sterilisation
process).
625

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.
32 / 40
WARNING
CAUTION
WARNING
CAUTION