Pneumatic valves are devices used to control the flow of compressed air or other gases in pneumatic systems. These valves are essential in many industrial and commercial systems, such as manufacturing equipment and machinery. Types of pneumatic valves include Directional Control Valves, Pressure Control Valves, Flow Control Valves, and Proportional Control Valves, each serving functions like controlling airflow direction, regulating air pressure, or adjusting flow rate.