Manual Air Control Valve, Valve Ways and Positions 3-Way/2-Position, Valve Port Size 1/4 in, Connection NPT, Valve Actuator / Return Foot Pedal / Spring, Max. CFM - Valves 0.83 cfm, Valve Max. Pressure Rating 150 psi, Valve Temp. Range 32 Degrees to 175 Degrees F, Center Position Closed, Coefficient of Volume 0.8, Body Material Aluminum, Overall Length 6 1/2 in, Overall Height 1 1/2 in, Overall Width 2 1/2 in, Series Directair 4, Manual Air Control Valve