Mounting A Concave Diaphragm; Mounting A Convex Diaphragm - GEM BioStar 650 Installation, Operating And Maintenance Instruction

11.3.2 Mounting a
concave diaphragm
Diaphragm size 8
Push-fit 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.
Important:
Do not use any greases or
lubricants!
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 - 100
Threaded pin type diaphragm:
Recess of compressor
Diaphragm boss
1. Move actuator A to the closed position.
2. Diaphragm size 10: ensure that the
anti-twist system is engaged.
Diaphragm sizes 25 - 80: place the
compressor loosely on the actuator
spindle, fit the grooves into the
guides (see chapter 11.3.1 "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
Fastening
holes are in correct alignment with the
spigot
bolt holes of the actuator.
11.3.3 Mounting a
1. Move actuator A to the closed position.
2. Diaphragm sizes 25 - 80: place the
compressor loosely on the actuator
spindle, fit the grooves into the
guides (see chapter 11.3.1 "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.
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 fit closely in the recess of the
compressor.
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convex diaphragm
Diaphragm pin
650