9-12 EB 8015 EN
Servicing
2. Slide the parts of the packing over the
plug stem in the specied order:
− Spring (11)
− Washer (12)
− Packing rings (16)
3. Slide the seals (15.2) over the plug stem.
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.
4. Insert the red spacer ring (15.1) between
the threaded bushing (8) and retaining
ring. See Fig.9-3.
5. Proceed as described in 'Standard pack-
ing (PTFE)', steps 12 to 14.
b) Version with insulating sec-
tion
Standard packing (PTFE)
1. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem exten-
sion (25).
2. Unscrew the threaded bushing (8).
3. Remove nuts (33) and bolts (32).
4. Carefully lift the valve bonnet (2) over the
plug stem extension (25).
5. Pull the entire packing out of the packing
chamber using a suitable tool.
6. Renew the damaged parts and carefully
clean the packing chamber.
7. Apply a suitable lubricant to all the pack-
ing parts and to the plug stem extension
(25).
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.
Version with perforated plug: place the
valve bonnet (2) onto the insulating sec-
tion, making sure that the hole of the
plug that releases the ow rst faces to-
ward the valve outlet.
See relevant section 'Mounting the actua-
tor onto the valve' in the 'Installation'
chapter.
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.9-3).
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 specied or-
der:
− Spring (11)
− Washer (12)