What type of actuator allows for rotational motion in pneumatic systems?

The rotary actuator is specifically designed to convert pneumatic power into rotary motion, making it the appropriate choice for creating rotational movement in pneumatic systems. Rotary actuators utilize compressed air to generate a torque output that can turn or rotate elements, such as valves or mechanical arms, around an axis. This is essential in applications where precise rotation is required, such as turning or positioning components.

In contrast, linear actuators produce straight-line motion rather than rotational movement, as they operate by extending or retracting in one direction. Flexible actuators typically provide movement through bending or flexing rather than rotating, and smart actuators incorporate advanced control mechanisms for enhanced performance but do not inherently define the type of motion they produce. Thus, the rotary actuator is the clear choice when the goal is to achieve rotational motion in pneumatic applications.