High Vacuum Solenoid Valve High Vacuum Solenoid Valve Valve Ways and Positions 2-Way/2-Position Normally Open Media - Valves Air Inert Gases Pipe Size - Valves 3/8 In. Min Operating Pressure Differential 0 psi Max Operating Pressure Differential Air/Inert Gas 15 psi Max Operating Pressure Differential Light Oil Not Rated Indoor Outdoor Voltage 120VAC Coefficient of Volume 4.60 Body Material - Valves Brass Coil Insulation Class F Seal Material - Valves NBR Orifice Dia 5/8 In.