40
EB 8059 EN
Servicing
7.3.2 Version with insulating
section
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Unscrew the castellated nut (92) and lift
the yoke (3) off the insulating section
(21).
3.
Undo the body nuts (14) gradually in a
crisscross pattern. Remove the bolts (13).
4.
Pull the insulating section (21) together
with the plug (5) out of the body (1).
5. Replace the body gasket (17). See sec-
6. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem.
7. Unscrew the threaded bushing (8).
8.
Pull the plug with plug stem (5) out of the
insulating section (21).
9. Make sure that the guide bushing (7) is
not damaged. If necessary, replace the
guide bushing using a suitable tool.
10.
Pull all the packing parts out of the pack
-
ing chamber using a suitable tool.
11. Renew damaged parts. Clean the pack-
ing chamber thoroughly.
12. Apply a suitable lubricant to all the pack-
ing parts and to the plug stem (5).
13.
Slide the plug with plug stem (5) into the
insulating section (21).
14.
Push the insulating section (21) together
with the plug (5) into the body (1).
Make sure that the threaded flanges (57,
111) are positioned parallel to each oth-
er and that their bolt holes are aligned
exactly above one another.
Version with V‑port plug:
place the insu-
lating section (21) onto the valve body,
making sure that the largest V-shaped
port of the V-port plug faces toward the
valve outlet. See section 5.1.
15. Carefully slide the packing parts over the
plug stem into the packing chamber us-
ing a suitable tool. Observe the proper
sequence (see Fig. 8).
16.
Insert the bolts (13) through the threaded
flanges (57, 111) and tighten them, ob
-
serving the tightening torque.
17. Tighten the body nuts (14) gradually in a
crisscross pattern. Observe tightening
torques.
18. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
19.
Place yoke (3) on the insulating section
(21) and fasten tight using the castellated
nut (92).
20. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem.
21. Mount actuator. See associated actuator
documentation.
22. Adjust lower or upper signal bench
range. See associated actuator docu-
mentation.
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