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Servicing
4. Lift the insulating section (21) together
with the plug stem and plug (5) off the
body (1).
5. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem (5).
6. Unscrew the top threaded bushing (8).
7. If necessary, replace the packing. See
section 9.4.3.
8. Undo the grub screw (88) at the bottom
threaded bushing (87) using a hex sock-
et screw.
Note
Do not completely unscrew the grub screw.
9. Loosen threaded bushing (87).
10. Pull the plug with plug stem (5) out of the
insulating section (21).
11. Carefully pull all the individual parts of
the circulation inhibitor out of the pack-
ing chamber using a suitable tool.
12. Renew the damaged parts and carefully
clean the packing chamber.
13. Carefully slide the individual parts of the
circulation inhibitor into the packing
chamber using a suitable tool. Observe
the proper sequence (see Fig. 9-2).
NOTICE
!
Damage to the packing by applying lubri-
cant.
Î Do not apply any lubricant to the pack-
ing rings of the circulation inhibitor.
9-10
14. Lightly screw in the threaded bushing
(87), but do not tighten it yet.
15. Slide the plug with plug stem (5) into the
insulating section (21).
16. Tighten the bottom threaded bushing
(87). Observe tightening torques.
17. Tighten the grub screw (88) using a hex
socket screw.
18. Screw in the top threaded bushing (8)
and tighten it. Observe tightening
torques.
19. Place the insulating section (21) together
with the plug stem and plug (5) onto the
body (1).
The following points must be observed:
Version with V-port plug: align the plug
(5), making sure that the largest
V-shaped port of the V-port plug faces
toward the valve outlet.
Versions with perforated plug: align the
plug (5), making sure that the hole clos-
est to the seal facing of the plug faces to-
ward the valve outlet.
See relevant information under 'Mount-
ing the actuator onto the valve' in the 'In-
stallation' section.
20. Firmly press the plug (5) into the seat (4).
Fasten down the insulating section (21)
with the body nuts (14). Tighten the nuts
gradually in a crisscross pattern. Ob-
serve tightening torques.
21. Place yoke (3) onto the insulating section
(21) and fasten using the castellated nut
(92).
22. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem (5).
EB 8046 EN
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