Solenoid Air Control Valve, Valve Ways and Positions 4-Way/2-Position, Voltage 110 to 120V AC, Center Position Not Applicable, Valve Actuator / Return Solenoid, ISO Class Not Applicable, Max.MK15 S PRT BSE 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.