Alfa Laval SRC - Assembly of Actuator

20
Rotate by hand
or with the
service tool!
Study the instructions carefully.
The items refer to the drawings and the parts list on the
pages 22-37.
Lubricate the rubber seals before fitting them.
A larger actuator is available for valve sizes 38-63.5
mm.
The spring assembly can be replaced by a stronger one.
A/A = Air/air activated.
5. Assembly of actuator
Top air connection
Bottom air
connection
1. Fit O-ring (5) on piston (6).
(For sizes DN125-150 also fit guide ring (22)
and top pin (23).
2. Fit the piston and spring assembly (10).
NOTE!
The A/A actuator has no spring assembly.
3
4
1
2
1. Fit lock wire (4) through the slot in cylinder (3)
into the hole in bonnet (8).
2. Rotate the cylinder 360
o
(see 4).
Maintenance
1. Fit O-rings (2, 7) in bonnet (8) and cylinder (3).
(For sizes DN125-150 also fit O-ring (24) and
guide rings (21, 25)).
2. Fit the cylinder.
NOTE!
It is recommended to rotate cylinder (3) further
180
o
in relation to bonnet (8) so that the top and
bottom air connections are fixed on the same side.