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13.3.2 Mounting a concave 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, fit the recesses into
the guides (see chapter 13.3.1 "General
information").
3. Check if the compressor fits closely in
the guides.
4. Screw new diaphragm tightly into the
compressor manually.
5. Check if the diaphragm boss fits closely
in the recess of the compressor.
6. If it is difficult 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.
13.3.3 Mounting a convex diaphragm
1. Move actuator
A
to the closed position.
2. Place the compressor loosely on the
actuator spindle, fit the recesses into
the guides (see chapter 13.3.1 "General
information").
3. Check if the compressor fits 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.
7. Screw diaphragm face tightly into the
compressor manually. The diaphragm
boss must fit closely in the recess of the
compressor.
Diaphragm boss
Recess of compressor
Com-
pressor
Adapter
Backing
diaphragm
Diaphragm face
Diaphragm pin
8. If it is difficult to screw it in, check the
thread, replace damaged parts.
9. 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.
10. Press the diaphragm face tightly onto
the backing diaphragm manually so that
it returns to its original shape and fits
closely on the backing diaphragm.
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