Samson 3256, Mounting And Operating Instructions, Page: 63 / 84

EB 8065 EN 9-13
Servicing
15. Place the bonnet (2) together with the
plug stem and plug (5) onto the body
(1).
Version with V-port plug: place the bon-
net (2) onto the valve body, making sure
that the largest V-shaped port of the
V-port plug faces toward the valve outlet.
See 'Mounting the actuator onto the
valve' in the 'Installation' section.
16. Carefully slide the packing parts over the
plug stem into the packing chamber us-
ing a suitable tool. Observe the proper
sequence (see Fig. 9-3).
17. Firmly press the plug (5) into the seat (4).
Fasten down the bonnet (2) with the
body nuts (14). Tighten the nuts gradual-
ly in a crisscross pattern. Observe tight-
ening torques.
18. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
19. Place yoke (3) on the bonnet (2) and fas-
ten tight using the castellated nut (92).
20. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem.
b) Version with insulating
section
1. Unscrew the castellated nut (92) and lift
the yoke (3) off the insulating section
(21).
2. Undo the body nuts (14) gradually in a
crisscross pattern.
3. Lift the insulating section (21) together
with the plug stem and plug (5) off the
body (1).
4. Replace the gasket as described in sec-
tion 9.4.1.
5. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem (5).
6. Unscrew the threaded bushing (8).
7. Pull the plug with plug stem (5) out of the
insulating section (21).
8. Pull the entire packing out of the packing
chamber using a suitable tool.
9. Make sure that the guide bushing (7) is
not damaged. If necessary, replace the
guide bushing using a suitable tool.
10. Unscrew the seat (4) using a suitable
tool.
11. Apply a suitable lubricant to the thread
and the sealing cone of the new seat.
12. Screw in the seat (4). Observe tightening
torques.
13. 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 section 9.4.2.
14. Slide the new plug with plug stem (5) in-
to the insulating section (21).
15. Place the insulating section (21) together
with the 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 'Mounting the actuator
onto the valve' in the 'Installation' sec-
tion.