Replacing The Packing; Replacing The Diaphragm And Plug - Samson 3349 Mounting And Operating Instructions

Î After all service work is completed, check
the control valve before putting it back
into operation (see section 5.5).
9.4.1

Replacing the packing

1. Remove the actuator from the valve. See
associated actuator documentation.
2. Undo the hex screws (34).
3. Lift the flange (20) together with the plug
stem (3), plug (2) and diaphragm (24)
off the body (1).
4. Unscrew the threaded bushing (5).
5. Pull the plug (2) together with plug stem
(3) and diaphragm (24) out of the flange
(20).
6. Pull the entire packing out of the packing
chamber using a suitable tool. Renew the
damaged parts and carefully clean the
packing chamber.
7. Push the plug (2) together with plug stem
(3) and diaphragm (24) into the flange
(20).
8. Carefully slide the packing parts over the
plug stem into the packing chamber us-
ing a suitable tool.
9. Tighten the threaded bushing (5).
10. Place the flange (20) together with the
plug stem (3), plug (2) and diaphragm
(24) onto the body (1).
11. Apply a suitable lubricant to the hex
screws (34).
12. Tighten the hex screws (34) on the flange
(20) gradually in a crisscross pattern.
Observe tightening torques.
EB 8048-21 EN
13. Mount actuator. See associated actuator
documentation and section 5.
14. Adjust lower or upper signal bench
range. See associated actuator docu-
mentation.
9.4.2 Replacing the dia-
phragm and plug
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Undo the hex screws (34).
3. Lift the flange (20) together with the plug
stem (3), plug (2) and diaphragm (24)
off the body (1).
4. Pull the plug (2) together with plug stem
(3) and diaphragm (24) out of the flange
(20).
For version with packing: replace the
packing (see section 9.4.1).
5. Unscrew the threaded pin (6).
6. Unscrew the plug stem (3) from the plug
(2).
7. Remove diaphragm (24).
8. Apply a suitable lubricant to the thread
of the plug stem (3).
9. Screw a new plug (2) onto the plug stem
(3) using a suitable tool. Observe tight-
ening torques.
10. Mark the side mounting position.
11. Unscrew the plug stem (3) from the plug
(2).
12. Insert a new diaphragm (24) into the
new plug.
Servicing
43