Pneumatic actuators are devices that convert compressed air into mechanical motion. They are commonly used in various industries to automate processes, such as opening and closing valves or moving machinery. The actuator operates by using air pressure to create movement, which can be linear or rotary, depending on the design. These actuators are known for their speed and efficiency, making them ideal for applications that require quick response times. They are often preferred over electric actuators in environments where moisture or dust is present, as they are less susceptible to damage from these elements.