Samson 3525, Монтаж и эксплуатация

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36 EB 8823 EN
Maintenance
7.1.2 Replacing the packing
Risk of valve damage due to abrasion.
The plug and seat facings are very sensitive.
Before unscrewing the bonnet from the body,
apply a signal pressure to the actuator to
slightly lift the plug off the seat. This prevents
the plug and seat from being damaged.
1. Bend down the flap of the tab washer
(224).
2. Apply a signal pressure to the actuator to
slightly lift the plug off the seat. Unscrew
the bonnet (2).
3. Lift bonnet (2) and plug with plug stem
(5) off the body (1). Remove tab washer
(224).
4. Unscrew guide bushing (7) placing a
suitable tool on the flats.
5. Remove stem connector clamp (A28).
See associated actuator documentation.
It is not necessary to completely remove the
actuator from the valve to replace the pack-
ing.
6. Pull the plug with plug stem (5) out of the
bonnet (2).
7. Pull all the packing parts out of the pack-
ing chamber using a suitable tool.
8. Replace damaged parts. Clean the pack-
ing chamber thoroughly.
9. Apply a suitable lubricant to the guide
bushing (7), to all the packing parts and
to the plug stem (36).
10. Slide guide bushing (7) and packing
parts over the plug stem. Make sure you
observe the proper order (see Fig. 10).
11. Carefully insert plug with plug stem,
packing parts and guide bushing into the
bonnet.
NOTICE
!
Note
70…100°
Flap of tab washer
End position
Bent flap
Fig. 9: Mounting the bonnet onto the body