Appendix
C.3.2
Setting the Full Stroke Adjustment Screw to the
Required Angle
1.
Move the pistons of the actuator inwards.
—
For Spring Return actuators this happens automatically when the actuator
is vented.
—
For double acting actuators vent the A-port and apply pressure to the
B-port.
2.
In order to set the actuator to the required angle, use next table to define the
number of revolutions which you have to turn in the Full Stroke
Adjustment Screws.
3.
Turn in both the adjustment screws (41) as defined in step 2. Both the adjustment
screws should be turned in with the same length or number of revolutions.
CAUTION: DO NOT SET SCREWS UN-EQUAL
Screwing in only one adjustment screw or un-equal setting of both the screws will lead to
high point loads on the pistons and can cause premature failure of the actuator.
4.
Test cycle the actuator to check if the correct rotation angle is set. If required,
repeat steps 1 to 3 to adjust the rotation angle to the required angle.
Table C-2
Actuator angle rotation per full revolution of Full Stroke adjustment screw
Actuator
size
Stroke
Flathead
screw driver
Screw
Actuator angle rotation per
full revolution of screw
mm
inch
Thread
Pitch (mm)
40
18.8
0.74
1.2 x 6.5
M8
1.25
6.0°
65
22.0
0.87
1.2 x 6.5
M8
1.25
5.1°
100
25.1
0.99
1.2 x 6.5
M10
1.5
5.4°
150
31.4
1.24
1.2 x 6.5
M10
1.5
4.3°
200
37.7
1.48
1.2 x 6.5
M10
1.5
3.6°
350
37.7
1.48
1.2 x 6.5
M12
1.75
4.2°
600
44.0
1.73
1.2 x 6.5
M16
2
4.1°
66
April 2019
Installation, Operation and Maintenance Manual
DOC.IOM.BQ.E Rev. 3
Appendix
