Keeping the World Flowing
17
12.7 Angular Stroke Setting
Certain valves incorporate their own stops. For such
valves, it is recommended that the actuator stop bolt
positions coincide with the valve stop position.
Contact the valve manufacturer to set the valve mechanical stops.
An incorrect setting of angular stroke could cause
damages to actuator, valve and/or to personnel.
12.7.1 Single-Acting Actuator, Cylinder Stop Bolt Setting
Perform the following operations as first setting.
Adjust the stop bolt located in the end flange of the cylinder
as follows:
4
5
5
7
6
A. Verify the absence of pressure
B. Remove cap nut (4) and seal washer (5)
C. Loosen stop nut (6) and seal washer (5)
D. Slowly pressurize the cylinder to detach stop bolt
from piston
7
E. Hold stop nut (6) with a wrench
F. With the help of a suitable size wrench, rotate the stop
bolt (7) counter clockwise to increase the angular stoke
G. Remove the pressure
H. Verify the newly obtained angular position with one stroke
I. Repeat operations A to H, until the desired angle is
obtained
7
J. With the help of a suitable size wrench, rotate the stop
bolt (7) clockwise to decrease the angular stoke
K. Remove the pressure
L. Verify the newly obtained angular position with one stroke
M. Repeat operations A to E and J to L, until the desired
angle is obtained
N. Re-position the seal washer (5) between flange and the
stop nut (7)
5
O. Hold the stop bolt (7) with a wrench and carefully tighten
the stop nut (6)
7
6
P. Re-position the seal washer (5) and verify it is correctly
positioned. Tighten cap nut (4)
4
5
12.0 Operation
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A4
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