Rack and pinion pneumatic actuators are mechanical devices used to automate the opening and closing of valves or dampers in industrial applications. This actuator system converts linear motion into rotational motion using a gear mechanism: a linear gear bar, or "rack", engages with a circular gear, or "pinion". Pneumatic air pressure drives the system, moving piston-type racks in opposite directions to create balanced forces on the pinion. As the pinion turns, it adjusts the valve stem, enabling precise control of the valve's position. This setup is favored for its reliability and efficiency in valve automation.
