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Rev: 01/18/2021
Adjusting the Pneumatic Actuators
Actuator Mounted Parallel with the Piping (Recommended)
1.
Ensure the actuator is de-pressurized before making any adjustments, by turning the Filter/Regular knob
counterclockwise until the pressure reads 0 psi. Make all adjustments on the outside of the actuator.
2.
To make the closing adjustment, loosen the gold nut. Turn the stop pin outwards counterclockwise to the limit closing
to less than 100%.
NOTE:
The right-side Silver Nut is for Open adjustment clockwise rotation. Opening adjustment is not typically required.
Flow (Speed) Control Valves Adjustment
Figure 11: Flow Control Valves
Pneumatic actuators are provided with the flow control valves. The flow control valves connected to the pneumatic
actuators are used to regulate the speed of the butterfly valve operation. To adjust the speed of the butterfly valves:
1.
Shut off the air supply.
2.
Remove the tubing from the closed port of the pneumatic actuator. Refer to the
a
bove to determine which port is the
closed port.
3.
Connect the tubing to the air supply in on the air switch.
4.
Remove the tubing from the open port of the pneumatic actuator.
5.
Connect the tubing from the air switch to both ports of the pneumatic actuator.
6.
Open the air supply.
7.
Move the switch to both the open and closed positions to verify proper operation of the valve in both positions.
