Replacing The Packing - Samson EB 8015 EN Mounting And Operating Instructions

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 ≤DN 150.
− 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.
a) Standard version
Standard packing (PTFE)
1. Undo the body nuts (14) gradually in a
crisscross pattern.
2. Lift the flange (2) and plug with plug
stem (5) off the body (1).
3. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem.
4. Unscrew the threaded bushing (8).
5. Pull the plug with plug stem (5) out of the
flange (2).
6. Pull the entire packing out of the packing
chamber using a suitable tool.
7. Renew damaged parts. Clean the pack-
ing chamber thoroughly.
EB 8015 EN
8. Apply a suitable lubricant to all the pack-
ing parts and to the plug stem (5).
9. Slide the plug with plug stem (5) into the
valve body (1).
10. Place the flange (2) 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.
See relevant section 'Mounting the actua-
tor onto the valve' in the 'Installation'
chapter.
11. Carefully slide the packing parts over the
plug stem into the packing chamber us-
ing a suitable tool. Observe the proper
sequence (see Fig. 9-3).
12. Firmly press the plug (5) into the seat (4).
Fasten down the flange (2) with the body
nuts (14). Tighten the nuts gradually in a
crisscross pattern. Observe tightening
torques.
13. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
14. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem.
ADSEAL packing
1. Proceed as described in 'Standard pack-
ing (PTFE)', steps 1 to 10.
Servicing
9-11