Pneumatic Solenoid Valve

A Pneumatic solenoid valve is an electromechanically operated valve used to control the flow of compressed air. In industrial automation, these valves are the primary interface between electrical controllers (like a PLC) and pneumatic actuators.
How it Works
The valve contains an internal plunger or spool that is moved by an electromagnetic coil (the solenoid). When an electric current passes through the coil, it creates a magnetic field that pulls the plunger, either opening or closing the internal ports to direct air flow.
Common Configurations
3/2 Way Valve: Has 3 ports and 2 positions. Used to operate single-acting pneumatic cylinders (where a spring returns the cylinder).
5/2 Way Valve: Has 5 ports and 2 positions. Used to operate double-acting pneumatic cylinders (where air is needed for both extension and retraction).
5/3 Way Valve: Similar to 5/2 but includes a "neutral" center position that can lock a cylinder in place or exhaust both sides.
Key Features
Solenoid Coil: The electrical component that triggers the valve.
Armature/Plunger: The moving part that redirects the air.
Manifold Mounting: Often installed on a manifold block to group multiple valves together for easier piping.
LED Indicator: Many connectors include a small light to show when the coil is energized.
Applications
Directly controlling pneumatic cylinders.
Acting as a pilot for larger valves (like the pneumatic butterfly valve).
Air-operated sorting systems and assembly lines.
Packaging machinery.