Mechanical Stroke Adjustment
3.
Turn the “closed” stop clockwise to reduce or counterclockwise to increase the
travel. Consult chapter 5.1.3 (angular displacement of the pinion), to define how
far the limit stop must be turned in or out.
4.
Remove air supply. Actuator will move to the closed position.
5.
Check whether the actuator valve assembly is in the required position.
If not repeat steps 1 to 5.
6.
Remove air supply.
7.
For adjusting the open position repeat steps 1 to 6, but now for the open position
and "open" stop (1).
Table 10.
Limit stop dimensions
Actuator size
Thread
Bolt Wrench
Nut wrench
size (mm)
size (mm)
25
M 6
10
10
40
M 8
13
13
65
M 10
17 (16)*
17 (16)*
100
M 10
17 (16)*
17 (16)*
150
M 10
17 (16)*
17 (16)*
200
M 12
19 (18)*
19 (18)*
350
M 16
24
24
600
M 20
30
30
950
M 22
12
32
1600
M 24
14
36
2500
M 27
17
41
4000
M 22
12
32
1. Default dimension according DIN933 standard.
2. Dimensions in brackets according ISO4017 standard.
3. Actuator size 12 is not available with limit stops.
5.1.3
Angular Displacement
Below table identifies, per actuator size, what the angular displacement of the pinions is,
when using the limit stop screws.
—
Turn the limit stop clockwise reduces the stroke.
—
Turn the limit stop counterclockwise to increase the stroke.
Table 11.
Angular Displacement limit stops
Actuator size
Turns for 5° adjustment of the pinion: 360° revolution of limit stop screw will adjust
F 12
Actuator size 12 is not available with limit stops
F 25
0.7
7.1°
F 40
0.8
6.3°
F 65
0.6
8.3°
F 100
0.7
7.1°
F 150
1.2
4.2°
F 200
1.0
5.0°
F 350
0.8
6.3°
F 600
0.8
6.3°
F 950
1.1
4.7°
F 1600
1.3
4.1°
F 2500
1.5
3.4°
F 4000
3.2
1.6°
NOTICE
In case of air leakage over the limit stop bolts, turn the lock nut of the limit stop bolts
tighter, until leakage stops.
Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
September 2017
21
Section 5: Mechanical Stroke Adjustment