13.3.2 Mounting A Concave Diaphragm - Gemü 613 Montageanleitung

Important:
If the diaphragm is not screwed
into the adapter far enough, the
closing force is transmitted directly
onto the diaphragm pin and not
via the compressor. This will cause
damage and early failure of the
diaphragm and thus leakage of the
valve. If the diaphragm is screwed
in too far no perfect sealing at the
valve seat will be achieved. The
function of the valve is no longer
ensured.
Important:
Incorrectly mounted diaphragm
may cause valve leakage /
emission of medium. In this case
remove the diaphragm, check the
complete valve and diaphragm and
reassemble again proceeding as
described above.
Diaphragm size 8:
The compressor is fi xed to
the spindle.
Compressor and actuator
fl ange seen from below:
Diaphragm size 10:
The compressor is loose.
Compressor and actuator fl ange seen from
below:
B
45°
A
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Anti-twist system of the spindle at the
compressor
A double flat (A) is fitted at the end of the
actuator spindle to protect the spindle
against twisting. When mounting the
compressor, the double flat must be in
correct alignment with the recess of the
compressor back (B).
If the actuator spindle is not in the correct
position, it must be turned to the correct
position. The position of the anti-twist
system is offset by 45° to the position of the
compressor guide.
Place the compressor loosely on the
actuator spindle, fit the grooves into the
guides (arrows). The compressor must be
able to be moved freely between the guides!

13.3.2 Mounting a concave diaphragm

Diaphragm size 8 (only GEMÜ 618)
Push-fi t diaphragm:
Recess of compressor
Tab
1. Move actuator A to the closed position.
2. Place the diaphragm 2 with the fastening
spigot in an inclined position at the
recess of the compressor.
3. Turn the diaphragm as manual force
is applied to push the spigot into the
compressor.
4. Align diaphragm tab (identifying
manufacturer and material) in parallel to
compressor weir.
Fastening
spigot
613, 618