Mounting A Concave Diaphragm; Mounting A Convex Diaphragm - GEM 620 Series Installation, Operating And Maintenance Instructions

Diaphragm size 150 (DN 150):
Compressor and actuator flange seen from
below:
11.3.2 Mounting a
concave diaphragm
Recess of compressor
Diaphragm boss
1. Move actuator A to the closed position.
2. Diaphragm sizes 25-50 (DN 15-50):
Place the compressor loosely on the
actuator spindle, fi t the grooves into the
guides (see chapter 11.3.1 "General
information").
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.
620
11.3.3 Mounting a
1. Move actuator A to the closed position.
2. Diaphragm sizes 25-50 (DN 15-50): Place
the compressor loosely on the actuator
spindle, fi t the grooves 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.
I.
II.
Diaphragm pin
Diaphragm face
III.
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 fi t closely in the recess of the
compressor.
Adapter
Com-
pressor
Backing
diaphragm
Diaphragm face
8. If it is diffi cult 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.
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convex diaphragm
Recess of compressor
Diaphragm boss
Diaphragm pin
Diaphragm pin