Solenoid Air Control Valve, Valve Ways and Positions 4-Way/2-Position, Voltage 24V DC, Center Position Not Applicable, Valve Actuator / Return Solenoid / Spring, ISO Class Not Applicable, Max. NPTF, Pilot Pressure 20 psi, Coefficient of Volume 1.MK15 UNIT DIN PLG Vacuum to 150 psig, NEMA Classification NEMA 4, Valve Vacuum Range 28 to 150 psig, Body Style Base-Mounted, Pilot Port Size 1/4 In.