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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.
11.4 Bonnet mounting
on the valve body
1. Move bonnet A to the closed position.
2. Open bonnet A approx. 20 %.
3. Position bonnet A with the mounted
diaphragm 2 on the valve body 1, take
care to align the compressor weir and
valve body weir.
4. Tighten bolts 18, washers 19 and
nuts 20 by hand (hand tight only)
(fastening elements may vary dependent
on diaphragm size and / or valve body
version).
5. Fully tighten the bolts 18 with nuts 20
diagonally.
6. Ensure that the diaphragm 2 is
compressed evenly (approx. 10-15 %,
visible by an even bulge to the outside).
7. Check tightness of completely
assembled valve.
Important:
Service and maintenance:
Diaphragms degrade in the course
of time. After valve disassembly /
assembly check that the bolts and
nuts on the body are tight and
retighten as necessary (at the very
latest after the first sterilisation
process).
653, 654
12 Special versions
12.1 Special version with
electrical locking device
Special version of GEMÜ 653 / 654: the
locking device is actuated by a solenoid
(see figure below).
With additional functions B, K, F (types
of locking devices) the locking device is
electrically locked or unlocked (solenoid,
order data: MAG).
"Normally closed version (locking pin
extended)" in 24 V DC (see type key).
The locking device is also available with
ATEX approval.
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