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7.2 Replacing the diaphragm
Note
The diaphragm in some versions can only be
replaced together with the diaphragm plate.
See Fig. 2.
Version without manual adjuster
Disassembly
1. Put the regulator out of operation (see
section 9.1).
For Type 46-6, completely relieve the
tension from the set point spring (8) by
turning the set point adjuster (10) coun-
terclockwise ().
2. Unscrew the screws (15). Remove the
bottom diaphragm case together with the
operating diaphragm (6.1) and dia-
phragm plate.
3. Pull the valve spring (5), if installed, out
of the body.
4. Hold the bottom nut (6.4) stationary and
unscrew the nut (6.3).
5. Replace diaphragm.
Assembly
1. Hold the bottom nut (6.4) stationary and
tighten the nut (6.3). Observe tightening
torques specified in section 7.3.
2. Insert the valve spring (5), if installed, in-
to the body.
3. Fasten the bottom diaphragm case to-
gether with the operating diaphragm
EB 3130 EN
(6.1) and diaphragm plate onto the
body with the screws (15).
4. Put the regulator into operation (see sec-
tion 5.3).
Version with manual adjuster
Disassembly
1. Put the regulator out of operation (see
section 9.1).
Type 46-6: completely relieve the tension
from the set point springs (8) by turning
the manual adjuster (19) counterclock-
wise () until you hear it a clicking
noise.
2. Unscrew the screws (15). Take off the
bottom section with manual adjuster
(14).
3. Pull the valve spring (5), if installed, out
of the body.
Unscrew the complete unit, consisting of
diaphragm (6.1) together the diaphragm
plates, spring (8) and support (21), from
the spindle (20) by turning the unit coun-
terclockwise (). Remove it from the bot-
tom section with manual adjuster.
4. Unscrew the complete unit.
Assembly
1. Push the complete assembly unit into the
bottom section over the spindle (20) and
turn it clockwise () one turn to fasten it
onto the spindle.
2. Lift the diaphragm plate to check wheth-
er the thread of the spring plate (9) has
engaged. If not, turn it once more.
Servicing
33
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