Version With Insulating Section - Samson 3241 Mounting And Operating Instructions

Maintenance
7.3.2 Version with insulating
section
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem exten-
sion (25).
3. Unscrew the threaded bushing (8).
4. Remove nuts (33) and bolts (32).
5. Carefully lift the valve bonnet (2) over the
plug stem extension (25).
6. Pull all the packing parts out of the pack-
ing chamber using a suitable tool.
7. Undo the body nuts (14) gradually in a
criss-cross pattern.
8. Lift the insulating section (21) together
with the plug stem extension (25), plug
stem and plug (5) off the body (1).
9. Replace gasket as described in sec-
tion 7.1.2.
10. Make sure that the guide bushing (23) is
not damaged. If necessary, replace the
guide bushing using a suitable tool.
11. Unscrew the seat (4) using a suitable
tool.
12. Apply a suitable lubricant to the thread
and the sealing cone of the new seat.
13. Screw in the seat (4). Observe tightening
torques.
14. Hold the plug and plug stem (5) station-
ary using assembly pliers. Unscrew the
plug stem extension (25) using a suitable
tool and take it out of the insulating sec-
tion (21).
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15. Apply a suitable lubricant to all packing
parts and the end of the plug stem of the
new plug (5).
We recommend replacing the packing as
well. See section 7.2.2.
16. Make sure that the two washers (30) are
still in the plug stem extension (25). Re-
new the washer, if necessary.
17. Hold the new plug with plug stem (5) sta-
tionary. Place on the insulating section
(21). Screw the plug stem extension (25)
onto the plug stem using a suitable tool.
Observe tightening torques.
18. Place the insulating section (21) together
with the plug stem extension (25), plug
stem and plug (5) onto the body (1).
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.
19. Press the plug (5) firmly into the seat (4),
while fastening down the insulating sec-
tion (21) with the body nuts (14). Tighten
the nuts gradually in a criss-cross pat-
tern. Observe tightening torques.
20. Carefully lift the valve bonnet (2) over the
plug stem extension (25) onto the insulat-
ing section (21).
21. Carefully slide the packing parts over the
plug stem extension into the packing
chamber using a suitable tool. Make sure
to observe the proper sequence (see
Fig. 9).
EB 8012 EN