Samson 3251 - Page 77

EB 8052 EN 9-15
Servicing
SAMSON recommends replacing the
packing as well (see Chapter9.4.2).
14. Slide the new plug with plug stem (5) in-
to the ange (2).
15. Place the ange (2) together with the
plug stem and plug (5) onto the body
(1).
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.
Version with perforated plug: place the
ange (2) onto the valve body, making
sure that the hole of the plug that releas-
es the ow rst faces toward the valve
outlet.
See relevant section 'Mounting the actua-
tor onto the valve' in the 'Installation'
chapter.
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 ange (2) with the body
nuts (14). Tighten the nuts 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 ange (2) and fas-
ten 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 sec-
tion
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 (see Chapter9.4.1)
5. Unscrew 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).
SAMSON recommends replacing the
packing as well (see Chapter9.4.2).
14. Slide the new plug with plug stem (5) in-
to the insulating section (21).