11.3 Connecting the
control medium
Important:
Connect the control medium line
tension-free and without any bends
or knots!
Use appropriate connectors
according to the application.
Thread size of the control medium
connector: G1/4
11.4 Mounting of proximity
switches M8x1
(
only for
GEMÜ 688
)
CAUTION
Incorrect mounting / wrong setting of the
proximity switches can stop the actuator
movement or destroy the switch!
Important:
Only use proximity switches that
can be mounted flush.
Important:
The proximity switches are
mounted when the valve is
completely assembled (with valve
body).
Important:
For diaphragm sizes 40 and 50
proximity switches with a minimum
thread length of 35 mm are
necessary.
The function of the proximity switches is only
ensured with full stroke.
With part stroke the upper piston may not
contact the upper proximity switch.
Setting the proximity switches:
1. Remove both threaded plugs M8x1 from
actuator distance piece:
2. Move the actuator to the open position.
3. Screw the upper proximity switch into the
upper threaded hole until it stops.
4. Then turn back upper proximity switch by
approx. 1 turn.
5. Lock this position by means of the nut.
6. Move the actuator to the closed position.
7. Screw the lower proximity switch into the
upper threaded hole until it stops.
8. Then turn back lower proximity switch by
approx. 1 turn.
9. Lock this position by means of the nut.
10. Move the actuator to the open and
closed position to check the function of
the proximity switches.
Upper
threaded
hole
Nut
Nut
Lower
threaded
hole
Upper
proximity
switch
Lower
proximity
switch
Compressor
Upper
threaded
plug
Lower
threaded
plug
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658, 688
Summary of Contents for 658
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