Alfa Laval Unique SSV Series, Instruction Manual

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5 Maintenance
Study the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly.
5.2 Dismantling the valve
Step 1
1a
Shut-off valve:
1. Remove cap, loosen screw and remove the washer by
sliding it sideways.
2. Loosen and remove clamp.
3. Lift away the crank.
4. Remove valve plug.
5. Remove O-ring, lip seal and bushing in bonnet.
(Use bushing tool and rubber mallet).
Note! Be careful not to damage the bushing.
Pay special attention to the warnings!
TD 461-959
Note! For plug seal replacement please see 17.
TD 461-601
1b
Change-over valve:
1. Loosen and remove lower clamp.
2. Lift away the crank and upper valve body.
3. Remove cap, loosen screw and remove the washer by
sliding it sideways.
4. Loosen and remove upper clamp.
5. Lift away the crank.
6. Remove valve body.
7. Remove seat and O-rings.
8. Remove O-ring, lip seal and bushing in bonnet.
(Use bushing tool and rubber mallet.
See drawing, step 1a).
Note! Be careful not to damage the bushing.
Pay special attention to the warnings!
Note! For plug seal replacement please see 17.
TD 461-607_1
UP
5.3 Plug seal replacement
1. Remove old seal ring using a knife, screwdriver or similar.
Be careful not to damage metal parts.
2. Pre-mount plug seal without pressing it into the groove.
3. Squeeze plug seal into the groove using opposite pressure points.
4. Release compressed air behind plug seal.
Note! For plug seal replacement please read instruction in service kit.
17
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