Gemü 534 Original Einbau- Und Montageanleitung Seite 24

The flow direction is indicated by an arrow

on the valve body:
Flow under the seat
Installation:
1. Ensure the suitability of the valve for
each respective use. The valve must
be appropriate for the piping system
operating conditions (medium, medium
concentration, temperature and
pressure) and the prevailing ambient
conditions. Check the technical data of
the valve and the materials.
2. Shut off plant or plant component.
3. Secure against recommissioning.
4. Depressurize the plant or plant
component.
5. Completely drain the plant (or plant
component) and let it cool down until
the temperature is below the media
vaporization temperature and scalding
can be ruled out.
6. Correctly decontaminate, rinse and
ventilate the plant or plant component.
Installation - Flange connection:
Install the valve in the condition it is
delivered in:
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. Use all flange holes.
5. 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 the delivery).
Tighten the bolts diagonally!
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Flow over the seat
26 / 36
6. Only use connector elements made of
approved materials!
Observe appropriate regulations for
connections!
After the installation:
Reactivate all safety and protective
G
devices.
11.2 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.
Control function 3
Double acting (DA):
Valve resting position: no defined normal
position. The valve is opened and closed
by activating the respective control
medium connectors (connector 2: open /
connector 4: close).
Only for control valves:
Control function 8
Double acting (normally open):
Valve resting position: opened by spring
force. The valve is opened and closed
by activating the respective control
medium connectors (connector 2: open /
connector 4: close).