EB 8015 EN 9-11
Servicing
a) Standard version
1. Undo the body nuts (14) gradually in a
crisscross pattern.
2. Lift the ange (2) and plug with plug
stem (5) off the body (1).
3. Replacing the gasket. See section9.4.1,
parta).
4. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem.
5. Unscrew the threaded bushing (8).
6. Pull the plug with plug stem (5) out of the
ange (2).
7. Pull the entire packing out of the packing
chamber using a suitable tool.
8. Unscrew the seat (4) using a suitable
tool.
9. Apply a suitable lubricant to the thread
and the sealing cone of the new seat.
10. Screw in the seat (4). Observe tightening
torques.
11. Apply a suitable lubricant to all the pack-
ing parts and to the new plug stem (5).
We recommend replacing the packing as
well. See section9.4.2, part a).
12. Slide the new plug with plug stem (5) in-
to the valve body (1).
13. Place the ange (2) onto the body.
Version with V-port plug: place the
ange (2) onto the valve body, making
sure that the largest V-shaped port of the
V-port plug faces towards the valve out-
let.
14. Carefully slide the packing parts over the
plug stem into the packing chamber us-
ing a suitable tool. Observe the proper
sequence (see Fig.9-2).
15. Firmly press the plug (5) into the seat (4).
Fasten down the ange (2) with the body
nuts (14). Tighten the nuts gradually in a
crisscross pattern. Observe tightening
torques.
16. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
17. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem.
b) Version with insulating
section
1. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem exten-
sion (25).
2. Unscrew the threaded bushing (8).
3. Remove nuts (33) and bolts (32).
4. Carefully lift the valve bonnet (2) over the
plug stem extension (25).
5. Pull the entire packing out of the packing
chamber using a suitable tool.
6. Undo the body nuts (14) gradually in a
crisscross pattern.
7. Lift the insulating section (21) together
with the plug stem extension (25), plug
stem and plug (5) off the body (1).
8. Replacing the gasket. See section9.4.1,
partb).
9. Make sure that the guide bushing (23) is
not damaged. If necessary, replace the
guide bushing using a suitable tool.