Samson 3321 - For Mounting on Rods (Form C)

EB 8111/8112 EN 43
Servicing
7.3.2 For mounting on rods
(FormC)
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Undo the body nuts (14) gradually in a
criss-cross pattern.
3. Lift the valve bonnet(2) and plug with
plug stem (5) off the body (1).
4. Replace gasket as described in sec-
tion7.1.2.
5. Unscrew the threaded bushing (8).
6. Pull the plug with plug stem (5) out of the
valve bonnet (2).
7. Pull all the packing parts out of the pack-
ing 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 section7.2.2.
12. Slide the new plug with plug stem (5) in-
to the valve body (1).
13. Carefully place the valve bonnet (2) over
the plug stem onto the body.
14. 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.11).
15. Press the plug (5) rmly into the seat (4),
while fastening down the valve bonnet
(2) with the body nuts (14). Tighten the
nuts gradually in a criss-cross pattern.
Observe tightening torques.
16. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
17. Mount actuator. See associated actuator
documentation.