5/3-way pneumatic solenoid valve, Configuration 5/3:, Closed Centers (C): The "C" configuration indicates that in the middle position all ports are, Dual Electric Control (EE): Operation is controlled by two separate electromagnetic coils (solenoids), one to move the valve in one direction and the other in the other direction., Implementation: It is a dual pilot solenoid valve, often supplied without the coils themselves (which must be purchased separately according to the voltage required, e.g. 24V DC, 24V AC, 220V AC). Port Size: 1/4"G (gas thread) or 1/4" NPT for the American version., Operating Pressure: The valve operates in a standard pressure range for compressed air, typically 2.5 to 10 bar (0.25 to 1 MPa).