A pneumatic valve is a device used to control the flow of compressed air in a pneumatic system. It regulates the movement of air to various components, such as cylinders and actuators, allowing for precise control of machinery and processes. These valves can be operated manually or automatically, depending on the application. Pneumatic valves come in various types, including solenoid valves, ball valves, and gate valves. Each type serves a specific function, such as starting or stopping airflow, directing air to different paths, or regulating pressure. Their reliable operation makes them essential in industries like manufacturing and automation.