Mounting The Diaphragm; General Information; Mounting A Concave Diaphragm - GEM 635 Installation, Operating And Maintenance Instructions

damage parts during cleaning!
3. Check all parts for potential damage.
4. Replace damaged parts (only use genuine
parts from GEMÜ).

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 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. 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.
635
Diaphragm size 10:
The compressor
is loose. Place the
compressor loosely
on the actuator
spindle, fi t the wings
into the guides.
Diaphragm sizes 25-50:
The compressor is loose.
Place the washer 1
G
loosely on the
actuator spindle.
Place the com-
G
pressor loosely
on the washer 1,
fi t the wings 2 into
the guides.
DN 12-25
(diaphragm size 25)
11.3.2 Mounting a
concave diaphragm
Recess of compressor
1. Move actuator A to the closed position.
2. Diaphragm size 10: Place the compressor
loosely on the actuator spindle, fi t the
wings into the guides (see chapter
11.3.1 "General information").Diaphragm
size 25-50: Place the washer loosely
28 / 36
DN 32-50
(diaphragm sizes 40-50)
Diaphragm pin
Diaphragm boss