AirSep AS-Q, Instruction Manual

Page: 163 / 198

AS-Q—AS-Z Series Instruction Manual 163
AirSep Corporation
7. Setting 100% Adjustable Stop (If applicable).
(Figure 19):
To limit the rotation on the stroke beyond the standard
±4˚ of a VPVL actuator, a stainless steel 100% adjustable
travel stop option can be added. The stops, located in the
end caps, allow the valve position to be set anywhere
between full closed and full open. This option limits
travel of only the couter-clockwise stroke for standard
double-acting and spring-closed units.
Follow the proceeding steps in order to set the 100%
adjustable travel stops.
Double Acting Actuators:
A. Back off one travel stop screw, leaving it partially
threaded in the end cap. Entirely remove the other
stop screw from the other end cap.
B. Open valve using air pressure. NOTE: Actuator will
leak due to removed travel stop.
C. Use the indicator pointer on top of actuator to
determine if valve is open to desired position. If not,
repeat steps 1-3, backing off or screwing in stop
screw to attain proper open position of valve.
D. Make sure O-ring is in proper position in
countersunk area on end cap and the washer is in
place. Tighten down nut to set stop position.
E. Thread in the other travel stop, making sure the
O-ring and washer are in the correct place. When
the travel stop will not thread any further, tighten
nut to set stop position.
F. The previous steps set the open travel stop. See
section 4.3.5 for instructions on setting the close
position stop.
Spring Return Actuators:
A. Back off one travel stop screw, leaving it partially
threaded in the end cap. Entirely remove the other
stop screw from the other end cap.
B. Open valve using air pressure. Note actuator will
leak due to removed travel stop.
C. Keeping air pressure applied to actuator, use the
indicator pointer on top of actuator to determine
Figure 19
Stop Screw
Type A
VPVL 051-300
O-ring
Washer
Nut
Travel Stop
Screw
L Min. Approx
L Max. Approx
Stop Screw
Type B
VPVL 350-800
Figure 18
19
39
IMO 11/17
IMO-528 EN 9