Samson 3259, Перевод оригинальной инструкции

Страница: 41 / 56

EB 8059 EN 41
Servicing
7.4 Replacing the seat and
plug
Risk of control valve damage due to incorrect
service or repair.
Seat and plug can only be replaced when all
the following conditions are met:
− The valve does not have a bellows seal.
− The standard packing or Form HT packing
is installed in the valve.
To replace seat and plug in other valve ver -
sions, contact SAMSON's After‑sales Service
department.
Risk of damage to the facing of the seat and
plug due to incorrect service or repair.
Always replace both the seat and plug.
When replacing the seat and plug, we also
recommend replacing the packing. See sec
-
tion 7.3.
7.4.1 Standard version
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Unscrew the castellated nut (92) and lift
the yoke (3) off the intermediate piece
(2).
3. Undo the body nuts (14) gradually in a
crisscross pattern. Remove the bolts (13).
4. Unscrew the intermediate piece (2) to-
gether with the plug (5) from the body
(1).
5. Replace the body gasket (17). See sec-
tion 7.2.1.
6. Unthread the stem connector nut (9) and
lock nut (10) from the plug stem.
7. Unscrew the threaded bushing (8).
8.
Pull the plug with plug stem (5) out of the
intermediate piece (2).
9. Make sure that the guide bushing (7) is
not damaged. If necessary, replace the
guide bushing using a suitable tool.
10. Pull all the packing parts out of the pack -
ing chamber 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. 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 7.3.1.
15. Slide the new plug with plug stem (5) in-
to the intermediate piece (2).
16. Push the intermediate piece (2) together
with the plug (5) into the body (1).
Make sure that the threaded flanges (57,
111) are positioned parallel to each oth-
er and that their bolt holes are aligned
exactly above one another.
NOTICE
!
NOTICE
!
Tip