Alfa Laval ARC series, Instruction Manual

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Installation
Study the instructions carefully.
The valve is supplied as separate parts to facilitate
the welding. The items refer to the drawings and the parts list on
pages 22-29.
Check the valve for smooth operation after welding.
3. Welding
Always weld the valve so that the valve body seal
ring can be replaced (change-over valve).
Maintain the minimum clearances (A and B) so
that the lower valve plug (change-over valve)
and the actuator with the internal valve parts
can be removed.
Stop valve:
Reassemble the valve in accordance with instruc-
tions 4-11 on pages 16-17.
Pay special attention to the warnings!
Change-over valve:
Reassemble the valve in accordance with in-
structions 3-11 on pages 16-17.
Pay special attention to the warnings!
Pre-use check:
1. Supply compressed air to the actuator.
2. Open and close the valve several times to
ensure that it operates smoothly.
Pay special attention to the warnings!
Valve size A (mm) B
1
(mm) B
2
(mm)
38 mm 160 550 660
51 mm 160 550 660
Change-over valve
(upper valve body)
Stop valve
B
1
B
2
(incl.
top unit)
B
1
B
2
(incl.
top unit)
Weld carefully!
A