Bettis Speed Control Option Installation Instructions

Installation Instruction

DOC.QC4.SC.1 Rev. B
October 2015

Control Modules

Speed control option

The module can be supplied with a Speed Control option.
One throttle is required for Spring Return actuators and up
to two for Double Acting actuators.

The speed control throttle controls the air ow in and out of

an air chamber and as such limits the speed of the “Open­ing” and “Closing” stroke simultaneously

1 Mounting Speed Control throttle(s):

1 Remove the plug(s) at the side of the module and turn in

the throttle (1).
2 Spring Return actuators: Use the top entry only.
3 Double acting actuators: Use both bottom and top entries.

- For standard actuators, the top entry will throttle the
closing stroke.

- For standard actuators, the bottom entry will throttle the
opening stroke.

- For reverse acting actuators, the opposite strokes will
be throttled.

2 Adjusting Speed Control throttle(s):

1 Remove the nut cap (2).
2 Clockwise rotation of the adjustment screw reduces the

speed.

3 Counter clockwise rotation of the adjustment screw in-

creases the speed.

4 Replace the nut cap.

Speed Control option

Figure 1 Speed Control option

O-ring seal

Speed control

Nut cover

Spring Return:
Top entry only.

Double Acting:
Bottom and/or top entries.

1

2