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11.3.2 Mounting a
concave diaphragm
Diaphragm size 8
Push-fit diaphragm:
Ta b
Fastening
spigot
Recess of compressor
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.
Diaphragm sizes 10 and 25
Threaded pin type diaphragm:
Diaphragm boss
Recess of compressor
Diaphragm
pin
1. Move actuator A to the closed position.
2. Place the compressor loosely on the
actuator spindle, fi t the recesses into
the guides (see chapter 11.3.1 "General
information") Diaphragm size 10: Ensure
that the anti-twist system is engaged.
3. Check if the compressor fi ts closely in
the guides.
4. Screw new diaphragm tightly into the
compressor manually.
5. Check if the diaphragm boss fi ts closely
in the recess of the compressor.
6. If it is diffi cult to screw it in, check the
thread, replace damaged parts (only use
genuine parts from GEMÜ).
7. When clear resistance is felt turn back
the diaphragm anticlockwise until its bolt
holes are in correct alignment with the
bolt holes of the actuator.
11.3.3 Mounting a
convex diaphragm
Diaphragm size 25
Threaded pin type diaphragm:
1. Move actuator A to the closed position.
2. Place the compressor loosely on the
actuator spindle, fi t the recesses into
the guides (see chapter 11.3.1 "General
information").
3. Check if the compressor fi ts closely in
the guides.
4. Invert the new diaphragm face manually;
use a clean, padded mat with bigger
nominal sizes.
III.
I.
II.
Diaphragm face Diaphragm pin
5. Position the new backing diaphragm
onto the compressor.
6. Position the diaphragm face onto the
backing diaphragm.
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