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11.3 Mounting the diaphragm
11.3.1 General information
Important:
Mount the correct diaphragm
that suits the valve (suitable for
medium, medium concentration,
temperature and pressure). The
diaphragm is a wearing part. Check
the technical condition and function
of the valve before commissioning
and during the whole term of use.
Carry out checks regularly and
determine the check intervals in
accordance with the conditions of
use and / or the regulatory codes
and provisions applicable for this
application.
Important:
Incorrectly mounted diaphragm
may cause valve leakage /
emission of medium. In this case
remove the diaphragm, check the
complete valve and diaphragm and
reassemble again proceeding as
described above.
Compressor and bonnet flange seen from
below:
The compressor is fixed to the spindle.
11.3.2 Mounting a
concave diaphragm
Diaphragm may be damaged if the
compressor is wound down too far!
Take care not to wind down the
G
compressor beyond the max. area
(see picture / grey arrows).
Recess of compressor
Tab
1.
Move bonnet A to the closed position.
2.
Place the diaphragm 2 with the
fastening spigot in an inclined position
at the recess of the compressor.
3.
Screw / push it in manually.
4.
Align diaphragm tab (identifying
manufacturer and material) in parallel to
valve body weir.
11.4 Bonnet mounting
on the valve body
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
diaphragm 2 on the valve body 1, take
care to align the compressor weir and
valve body weir.
5.
Insert and tighten the bolts 18 with
washers 19 by hand (hand tight only).
6.
Fully tighten the bolts 18 diagonally.
27/32
CAUTION
601, 602
Fastening
spigot
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