SMC VFR5310-5DZ-04F-Q valve, dbl non-plugin, VFR5000 SOL VALVE 4/5 PORT A pneumatic solenoid valve is a device used to control the flow of air in a pneumatic system. It consists of an electromagnetic coil, a solenoid, and a valve that regulates the air flow. When an electric current is applied to the electromagnetic coil, a magnetic field is generated that opens or closes the valve, allowing or blocking air. This allows the flow of air in a pneumatic system to be controlled and the pressure and direction of movement of connected pneumatic devices to be regulated. Pneumatic solenoid valves are used in a variety of industrial applications, such as automation systems, machine and equipment control systems, traffic control systems, climate control systems, and many other contexts where precise and reliable air flow control is required.