Control Functions; Connecting The Control Medium - Gemü R690 Original Einbau- Und Montageanleitung

After the installation:
Important:
Diaphragms degrade in the course
of time. After valve installation
and commissioning you must
retighten the bolts 18 (see chapter
20 "Sectional drawing and spare
parts").
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: undefined. The
valve is opened and closed by activating
the respective control medium connectors
(connector 2: open / connector 4: close).
Control function 1
R690
Connector 2
Control function 2 + 3
Control function
1 (NC)
2 (NO)
3 (DA)
+ = available / - = not available (for connectors 2 / 4
see pictures on the left and above)
11.3 Connecting the control
medium
Only use control medium lines with
cylindrical threads!
® Using conical threads can cause
stress cracking at the control medium
connector.
Important:
Connect the control medium lines
tension-free and without any bends
or knots!
Use appropriate connectors
according to the application.
Thread size of the control medium
connectors: G1/4
Control function
1 Normally closed (NC)
2 Normally open (NO)
3 Double acting (DA)
For connectors 2 / 4 see pictures on the left and above
28 / 40
Connector 4
Connector 2
Connectors
2
+
-
+
CAUTION
Connectors
2: Control medium (open)
4: Control medium (close)
2: Control medium (open)
4: Control medium (close)
4
-
+
+