Replacing The Packing - Samson 3251 Mounting And Operating Instructions

Servicing
port of the V-port plug faces towards the
valve outlet.
Version with perforated plug: place the
insulating section (21) onto the valve
body, making sure that the hole of the
plug that releases the flow first faces to-
ward the valve outlet.
See relevant section 'Mounting the actua-
tor onto the valve' in the 'Installation'
chapter.
6. Firmly press the plug (5) into the seat (4).
Fasten down the insulating section (21)
with the body nuts (14). Tighten the nuts
gradually in a crisscross pattern. Ob-
serve tightening torques.
9.4.2

Replacing the packing

NOTICE
!
Risk of control valve damage due to incor-
rect servicing.
Î The packing can only be replaced when
all the following conditions are met:
− The nominal size is ≤NPS 4.
− The valve does not have a balanced
plug.
− The valve does not have a bellows
seal.
− The standard or ADSEAL packing is
installed in the valve.
Î To replace the packing in other valve ver-
sions, contact our after-sales service.
9-10
a) Standard version
Standard packing (PTFE)
1. Unscrew the castellated nut (92) and lift
the yoke (3) off the flange (2).
2. Undo the body nuts (14) gradually in a
crisscross pattern.
3. Lift the flange (2) and plug with plug
stem (5) off the body (1).
4. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem.
5. Unscrew the threaded bushing (8).
6. Pull the plug with plug stem (5) out of the
flange (2).
7. Pull the entire packing out of the packing
chamber using a suitable tool.
8. Renew damaged parts. Clean the pack-
ing chamber thoroughly.
9. Apply a suitable lubricant to all the pack-
ing parts and to the plug stem (5).
10. Slide the plug with plug stem (5) into the
flange (2).
11. Place the flange (2) together with the
plug stem and plug (5) onto the body.
Version with V-port plug: place the
flange (2) onto the valve body, making
sure that the largest V-shaped port of the
V-port plug faces towards the valve out-
let.
Version with perforated plug: place the
flange (2) onto the valve body, making
sure that the hole of the plug that releas-
es the flow first faces toward the valve
outlet.
EB 8052 EN