Actuator Mounting On The Valve Body - Gemü DN 4 - 25 Montageanleitung

Diaphragm sizes 10 and 25
Threaded pin type diaphragm:
Recess of compressor
Diaphragm boss
1. Move actuator A to the closed position.
2. Place the compressor loosely on the
actuator spindle, fi t the grooves into the
guides (see chapter 12.3.1 "General
information"). 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.
12.4 Actuator mounting
1. Move actuator A to the open position.
2. Check if all the distance sleeves have
been inserted. If necessary, insert the
distance sleeves into the bolt holes of
the diaphragm 2. Observe the position
Diaphragm pin
of the sleeve collar (see chapter 12.3.1
"General information")!
3. Position the actuator A with the mounted
diaphragm 2 on the valve body 1, take
care to align the compressor weir and
valve body weir (only for diaphragm
size 8).
4. Insert and tighten the bolts 18,
washers 19 and nuts 20 by hand (hand
tight only) (the fastening elements may
vary depending on the diaphragm size
and / or the valve body version).
5. Move actuator A to the closed position.
6. Fully tighten the bolts 18 with nuts 20
diagonally.
7. Ensure that the diaphragm 2 is
compressed evenly (approx. 10-15 %,
visible by an even bulge to the outside).
8. Check tightness of completely
assembled valve.
39 / 48
on the valve body
Important:
Service and maintenance:
Diaphragms degrade in the course
of time. After valve disassembly /
assembly check that the bolts 18
and nuts 20 on the body are tight
and retighten as necessary (at the
very latest after the first sterilisation
process).
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