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1
1. Pull out the spindle
2. Align the indentation of the distance
1.
piece 4 to the spring and push it over
the spindle 1 using the spring 2 and fix
it in place using the operating bush 3.
3. Tighten the operat-
4. Affix the O-ring 5 and the adapter 6.
ing bush 3 by turning
it clockwise.
7
5. Attach the flange
6. Screw the flange plate on tight using
plate 7
screws 8 (1 – 1.5 Nm).
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1
4
2
3
5
6
8
- Push in the spindle until it pushes against the spring and
then slowly release the pressure on the spring.
▶ For some valves (e.g. GEMÜ 650 and GEMÜ 687) it is ne-
cessary to fit a pressure disc between the threaded ad-
apter and the actuator head. This is included in the re-
quired mounting kits, sometimes with an additional O-ring
(only GEMÜ 650 with normally open and double-acting
control function – code 2+3).
▶ If the pressure disc does not have a groove for a seal, this
will already be inserted in the groove provided at the ad-
apter opening of the actuator head (e.g. GEMÜ 687 with
normally open control function – code 2).
10
Insert the O-ring 11 (if in-
cluded) into the corresponding
groove on the adapter 6.
10.4 Threaded adapter assembly (linear actuator)
With some mounting kits, it is necessary to install a threaded
adapter as well. This threaded adapter is enclosed with the re-
quired mounting kits. Valves with a normally open and double
acting control function (code 2+3) also include additional O-
rings (1+2).
1. Move the actuator to the closed position.
2. Place O-rings 1 and 2 into threaded adapter 3.
3. Screw threaded adapter 3 into the actuator opening as far
as it will go and tighten.
11 / 23
10 Assembly and installation
NOTICE
6
11
9
If included: Push the pressure
disc 9 over the adapter 6 and
insert the O-ring 10 in the in-
tended groove of the pressure
disc.
1
3
2
GEMÜ 4240
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