A 3, Way pneumatic piston valve acts as a specific kind of valve employed for regulation the movement of atmospheric air or gaseous substanceses in pneumatic systems. It operates using a piston mechanism to switch between three different ports. This section presents a comprehensive summary of important features and description 3, Way configuration three ports port 1 pressure inlet the port where pressurized air or gas enters the valve. Port 2 output 1 the port where the fluid is directed to one included in the system. Port 3 output 2 the port where the fluid is directed to another part of the system or exhausted.