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 is composed of an electromagnetic coil, a solenoid and a valve, which regulates the air flow. When an electric current is applied to the electromagnetic coil, a magnetic field is generated which opens or closes the valve, allowing air to pass through or block it. In this way, it is possible to control the flow of air in a pneumatic system and regulate the pressure and direction of movement of connected pneumatic devices. Pneumatic solenoid valves are used in a variety of industrial applications, such as in automation systems, machine and equipment control systems, traffic control systems, climate control systems and many other contexts where it is necessary control airflow precisely and reliably.