Replacing The Seat And Plug - Samson 3241 Series Mounting And Operating Instructions

Servicing
8. Carefully lift the valve bonnet (2) over the
plug stem extension (25) onto the insulat-
ing section (21).
Version with V-port plug: place the valve
bonnet (2) onto the insulating section,
making sure that the largest V-shaped
port of the V-port plug faces towards the
valve outlet.
9. Carefully slide the packing parts over the
plug stem extension into the packing
chamber using a suitable tool. Observe
the proper sequence (see Fig. 9-2).
10. Fasten the valve bonnet with nuts (33)
and bolts (32). Observe tightening
torques.
11. Screw in the threaded bushing (8) and
tighten it. Observe tightening torques.
12. 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 8.
2. Slide the parts of the packing over the
plug stem extension in the specified or-
der:
− Spring (11)
− Washer (12)
− Packing rings (16)
3. Slide the seals (15.2) over the plug stem
extension.
Insert the wire of the red spacer ring
(15.1) into the groove of the retaining
ring.
Slide the retaining ring over the plug
stem extension.
9-10
4. Insert the red spacer ring (15.1) between
the threaded bushing (8) and retaining
ring. See Fig. 9-2.
5. Proceed as described in 'Standard pack-
ing (PTFE)', steps 10 to 12.
9.4.3 Replacing the seat and
plug
NOTICE
!
Risk of control valve damage due to incor-
rect servicing.
Î Seat and plug can only be replaced
when all the following conditions are
met:
− The valve 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 seat and plug in other valve
versions, contact our after-sales service.
NOTICE
!
Risk of damage to the facing of the seat
and plug due to incorrect servicing.
Î Always replace both the seat and plug.
Tip
When replacing the seat and plug, we also
recommend replacing the packing (see sec-
tion 9.4.2).
EB 8015 EN