Alfa Laval ARC series, Instruction Manual

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Maintenance
2. Dismantling of valve
Study the instructions carefully.
The items refer to the drawings and the parts list on
pages 22-29. Handle scrap correctly.
NC = Normally closed.
NO = Normally open.
A/A = Air/air activated.
Turn upper stem (19) anticlockwise and remove
it from lower stem (22a), (counterhold with a
spanner).
Change-over valve:
Remove lower stem (22a) from upper valve
body (16).
Change-over valve:
1. Remove screw (22g), O-ring (22f) and was-
her (22e) from lower stem (22as).
2. Remove seal (22d), middle piece (22c) and
seal (22b) from the stem.
Stop valve:
1. Remove screw (22g), O-ring (22f) and
washer (22e) from lower stem (22a).
2. Remove seal (22d) from the stem.
1. Remove diaphragm (20a), diaphragm (20b)
and stem seal (20d) from lower stem (22a).
2. Remove L-seal (20c) from diaphragm (20b).