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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 defi ned normal
position. The valve is opened and closed
by activating the respective control
medium connectors (connector 2: open /
connector 4: close).
Connector 2
Connector 4
Connector 2
Control
function
1 (NC)
2 (NO)
3 (DA)
+ = available / - = not available
(for connectors 2 / 4 see pictures on the left)
11.3
Connecting the
control medium
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
11.4
Optical position indicator
GEMÜ 600
Valve open
The diaphragm valve is equipped with an
optical position indicator.
Function principle of the position
indicator:
When opening the valve, the internal red
G
position indicator (grey) is pressed upwards
and pushed over the black frame (black).
Valve open: indicator is red
Valve closed: indicator is black
31 / 44
Connectors
2
4
+
-
-
+
+
+
Connectors
2: Control medium (open)
4: Control medium (close)
2: Control medium (open)
4: Control medium (close)
Valve closed
600, 630
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