9-6 EB 8222-1 EN
Service and conversion work
10. Push the packing (40) into the packing
chamber. Make sure the V-rings are
properly aligned (see Fig.9-3).
11. Lubricate the screw connection (60 or
65, 75) and use it to fasten the packing
gland (15) including the bearing bushing
(17) onto the valve body. Observe tight-
ening torques.
Fig.9-3: Alignment
9.5.2 Replacing the seat ring
See sectional views in the 'Design and prin-
ciple of operation' section and Fig.9-4.
Preparation work for all versions
1. Unscrew both retaining screws (70) and
remove them together with the washers
(80).
2. Take out the retainer (30) together with
the gasket (46).
If you are unable to remove the retainer,
use the special tool (uAB0100).
Valve seat
Fig.9-4: Position in the valve
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