Before the screws leave the threads the springs
become free of tension.
If in the initial rotation the screws are jammed, hit them
lightly on the head with a flat pin to make them loose.
When there are 4 screws in the cover (sizes C60,
C75), work on two opposing screws first and then on
the second set as described before.
3.3
Remove the covers making sure not to damage the
cover seals.
3.4
Remove the springs (4,5,6) from the cylinder and lay
them together in their covers for the assembly stage.
The indicator snaps to the pinion with its
Namur interface projecting above it and
enabling any ancillary to connect to the
pinion.
Installation, Operating & Maintenance instructions
PAGE 5
IDENTIFICATION
Compact II actuators are supplied with a nameplate which
is located on the side of the body. The information includes
actuator size, model, type, spring set, threads, indicator,
additional options, date of manufacture, protection rating,
pressure limits and company logo.
Actuator
description
Date of
manufacture
H20 SR-2A2B-R M/45
QUA
TER TURN
ACTUA
T
O
R
MODEL
SERIES
MAX PRESSURE: 120 PSI, 8 BAR
********** * **
COMP
ACT
II, 12305, IL
II 2 GD cg T4
Baseefa04ATEX0042X
ATEX marking of
explosion protection
“GD” for
Gas & Dust
CE mark
Limiting
Pressure
DISASSEMBLY
General
Before performing any disassembly operations make sure
you read all the warnings and safety instructions in this
leaflet.
1
Do not attempt to disassemble the actuator while it is still
connected to the valve or to any ancillary.
Verify that the actuator is not pressurized. Check that the air
ports are vented and spring return actuators are in the fail
close position.
Work in a clean area, free of dust, debris, grease, corrosives
and moisture. For security and comfort do the repairs on a
table with a vice and available air supply. Clamp an adaptor
to the vice and place the actuator drive on it.
Use only Metric
hex head wrenches and make sure they are not blunt on the
edges
2.1
Before disassembly, mark the covers (8, 8A, 9) with
the body. This is recommended to identify each cover
to its original position when you re-assemble the
actuator.
2.2
Remove the cover screws (10). If in the initial rotation
the screws are jammed, hit them lightly on the head
with a flat pin to make them loose.
2.3
Remove the covers making sure not to damage the
O-ring seals (7, 7A, 10).
When removing the Namur cover (8A) make sure the
O-ring connecting to the inner chamber is secure in
its slot.
To convert to SR actuator, go to Section 6 for assembly.
Disassembly of Double
Acting Covers
2
Caution: Springs in the actuator are under tension.
3.1
Before disassembly, mark each of the covers (8,8A,9)
with the body. This is recommended to identify each
cover to its original position when you re-assemble
the actuator.
3.2
Remove the cover screws in sequence by turning
each opposing screw two rotations at a time. When
removing the Namur cover (8A) make sure the
O-ring connecting to the inner chamber is secure in
its slot.
Disassembly of Spring
Return Covers
3
