28
EB 2534 EN
Servicing
7.2 Replacing the set point
springs
Î
See Fig. 2
Removing the set point springs
1. Completely relieve the tension from the
set point springs (7) of the diaphragm
actuator by turning the set point adjuster
(6) counterclockwise (
).
2. Remove the set point adjuster (6) and
spring plate (5).
3. Take out the set point springs (7).
Mounting the set point springs
4. Insert new set point springs (7).
5. Place on the spring plate (5) and screw
on the set point adjuster (6).
Change the nameplate and configuration ID
after changing the set point range.
Note
Mount the operating diaphragm as follows:
1. Insert the operating diaphragm into the
actuator housing onto the bottom dia-
phragm plate (16).
2. Place on the top diaphragm plate (17)
and screw on the nut (18) while holding
the top end of the plug stem (4) with a
box wrench (width across the flats 8) sta
-
tionary. Observe tightening torque speci-
fied in section 7.3.
3. Place on the diaphragm case (10) to-
gether with the actuator stem and set
point springs and tighten the bolts (35)
evenly. Observe tightening torque speci-
fied in section 7.3.
4. Screw the control line (14) onto the screw
fittings (15). Observe tightening torque
specified in section 7.3.
The stem surface is roller-burnished. Do not
reface the stem.
After replacing the diaphragm stem, the nip-
ple (guide bushing) in the actuator case must
be replaced as well.
The associated order number is written on
the actual operating diaphragm.
Note
Tip
