Samson 3349, Mounting And Operating Instructions

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9-10 EB 8048-2 EN
Servicing
42
43
20.3
41
3
Fig. 9-6: Stem seal (micro-flow valve version
without packing)
9.6.1 Replacing the packing
(micro-flow valve ver -
sion only)
3
41
19
19
20.3
15
43
23
Fig. 9-7: Packing (with Type 3379 Actuator)
1. Undo the screws (34) on the valve bon-
net (20.3).
2. Lift the actuator and valve bonnet (20.3)
together with the plug stem (3), plug
(2),and diaphragm (24) off the body (1).
3. Unscrew the plug stem (3) together with
plug (2) and diaphragm (24) off the ac-
tuator stem and pull it out of the valve
bonnet (20.3).
4. Unscrew the actuator onto the valve bon-
net (20.3).
5. Compress the packing (15, 19, 23) using
a suitable tool and remove the snap ring
(43).
6. Pull the entire packing parts (15, 19, 23)
out of the packing chamber using a suit-
able tool. Renew the damaged parts and
carefully clean the packing chamber.
7. Check the plug (2) and diaphragm (24)
for damage. Replace them, if necessary
(see section 9.6.2).
8. Push the plug (2) together with plug stem
(3) and diaphragm (24) into the valve
bonnet (20.3).
9. Carefully slide the packing parts (15, 19,
23) over the plug stem (3) into the pack-
ing chamber using a suitable tool.
10. Compress the packing using a suitable
tool and insert the snap ring (43).
11. Fasten the actuator onto the valve bonnet
(20.3).
12. Apply a suitable lubricant to the actuator
stem.
13. Screw the plug stem (3) together with
plug (2) and diaphragm (24) onto the
actuator stem. Observe tightening
torques.
14. Place the actuator and valve bonnet
(20.3) together with the plug stem (3),
plug (2) and diaphragm (24) onto the
body (1).