5. Completely drain the plant or plant
component and allow it to cool down
until the temperature is below the media
vaporization temperature and cannot
cause scalding.
6. Correctly decontaminate, rinse and
ventilate the plant or plant component.
Note on EHEDG certified valves:
EHEDG certified valves must be
installed so that they can be easily
cleaned and drained. For valves
with weld ends, the weld seams
must be made in accordance with
EHEDG Guideline 9 and 35. For
valves with removable connections,
the "Position Paper" of the EHEDG
must be taken into account and, if
necessary, special seals must be
used.
Installation - Butt weld spigots:
1. Adhere to good welding practices!
2. Disassemble the actuator with the
diaphragm before welding the valve body
into the pipeline (see chapter 11.1).
3. Allow the butt weld spigots to cool down.
4. Reassemble the valve body and the
actuator with diaphragm (see chapter
11.4).
Installation - Clamp connections:
G
When installing clamp connections,
insert a gasket between the body clamp
and the adjacent piping clamp and join
them using the appropriate clamp fitting.
The gasket and the clamp for clamp
connections are not included in the scope
of delivery.
Important:
Butt weld spigots / clamp
connections: Angle of rotation for
welding into pipeline to enable
optimised draining see brochure
"Angle of rotation for 2/2-way valve
bodies" (on request or www.gemu-
group.com).
Installation - Threaded connections:
G
Screw the threaded connections into the
piping in accordance with valid standards.
G
Screw the diaphragm valve body into the
piping, use appropriate thread sealant.
The thread sealant is not included in the
scope of delivery.
Installation - Flanges:
1. Pay attention to clean, undamaged
sealing surfaces on the mating flanges.
2. Align flanges carefully before installing
them.
3. Centre the seals accurately.
4. Connect the valve flange and the piping
flange using appropriate sealing material
and matching bolting. Sealing material
and bolts are not included in the scope
of delivery.
5. Use all flange holes.
6. Only use connector elements made of
approved materials!
7. Tighten the bolts diagonally!
Observe appropriate regulations for
connections!
After the installation:
G
Re-attach or reactivate all safety and
protective devices.
10.2 Control functions
The following control functions are available:
Control function 1
Normally closed (NC):
Valve resting position: closed by spring
force. Activation of the actuator (connector
2) opens the valve. When the actuator is
vented, the valve is closed by spring force.
Control function 2
Normally open (NO):
Valve resting position: opened by spring
force. Activation of the actuator (connector
4) closes the valve. When the actuator is
vented, the valve is opened by spring force.
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