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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).
Connector 2
Connector 4
Control function
Connectors
24
1 (NC) + -
2 (NO) - +
3 (DA) + +
8 (normally open) + +
+ = available / - = not available
(for connectors 2 / 4 see picture above)
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
2 and 4:
Actuator size Thread
B G 1/8
0, 0K, 1, 1K, 2, 2K, 3, 3L, 4, 4L G 1/4
Control function Connectors
1 Normally closed (NC) 2: Control medium (open)
2 Normally open (NO) 4: Control medium (close)
3 Double acting (DA)
2: Control medium (open)
4: Control medium (close)
8
Double acting
(normally open)
2: Control medium (open)
4: Control medium (close)
For connectors 2 / 4 see picture on the left
12 Assembly / disassembly of spare
parts
See also chapter 11.1 "Installing the valve"
and chapter 20 "Sectional drawing and
spare parts".
Pictures for assembly of actuator B see
chapter 14 "Inspection and servicing".
Assembly valve (check valve) for
disassembling / assembling the actuator:
Thread Item number
G 1/8 99021182
G 1 /4 99021181
12.1 Disassembly of actuator
1. Move actuator A to the open position.
2. Actuator size B:
Loosen actuator with a pin wrench
(pin size 3 mm).
Actuator sizes 0, 0K, 1, 1K, 2, 2K, 3, 3L,
4, 4L: Loosen union nut a.
3. Remove actuator A from valve body 1.
4. Disconnect actuator A from control medium
lines.
Important:
After disassembly, clean all parts
of contamination (do not damage
parts). Check parts for potential
damage, replace if necessary (only
use genuine parts from GEMÜ).
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