Bonnet Mounting On The Valve Body - GEM 673 Installation, Operating And Maintenance Instructions

compressor.
Adapter Recess of compressor
Compressor
Backing
diaphragm
Diaphragm boss
6. If it is diffi cult to screw it in, check the
thread, replace damaged parts.
7. When clear resistance is felt turn back
the diaphragm until its bolt holes are in
correct alignment with the bolt holes of
the bonnet.
8. Press the diaphragm face tightly onto
the backing diaphragm manually so that
it returns to its original shape and fi ts
closely on the backing diaphragm.
12.4 Bonnet mounting
1. Move bonnet A to the closed position.
2. Open bonnet A approx. 20 %.
3. Clean all parts of the remains of product
and contamination. Do not scratch or
damage parts during cleaning!
4. Position bonnet A with the mounted
Threaded pin
diaphragm 2 on the valve body 1,
aligning the diaphragm weir and valve
body weir.
5. Tighten the bolts 18, washers 19 and
nuts 20 by hand (hand tight only).
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.
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on the valve body
Important:
Service and maintenance:
Diaphragms loose seal compression
in the course of time. After valve
assembly / disassembly check that
the bolts and nuts on the body are
tight and retighten as necessary
(at the very latest after the fi rst
sterilisation process). Bolt tightness
/ valve sealing should be checked
on a regular basis and points 6-7 of
chapter 12.4 should be repeated.
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