12.3 Mounting the diaphragm
12.3.1 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 diaphragm 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:
If the diaphragm is not screwed
into the adapter far enough, the
closing force is transmitted directly
onto the diaphragm pin and not
via the compressor. This will cause
damage and early failure of the
diaphragm and thus leakage of the
valve. If the diaphragm is screwed
in too far no perfect sealing at the
valve seat will be achieved and the
function of the valve is no longer
ensured.
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.
The compressor is loose for all diaphragm
sizes.
Diaphragm size 10
(
DN 10 - 15
)
:
Compressor and actuator flange seen from
below:
Anti-twist system of the spindle at the
compressor
A double flat (arrows picture 2) is fitted at
the end of the actuator spindle to protect
the spindle against twisting. When mounting
the compressor, the double flat must be
in correct alignment with the recess of the
compressor back (arrows picture 1).
If the actuator spindle is not in the correct
position, it must be turned to the correct
position. The position of
A
is offset by 45° to
the position of
C
.
Place the compressor loosely on the
actuator spindle, fit the recesses
D
into the
guides
C
and
A
into
B
. The compressor
must be able to be moved freely between
the guides!
B
D
C
D
B
C
A
A
Pict. 1
Pict. 2
33 / 44
658, 688
Содержание 658
Страница 42: ...42 44 658 688 ...
Страница 43: ...43 44 658 688 ...