Solenoid Valve Less Coil Solenoid Valve Less Coil 3-Way Normally Closed Media - Valves Air Steam Water Pipe Size - Valves 1/4 In. Min Operating Pressure Differential 0 psi Max Operating Pressure Differential Air/Inert Gas 90 psi Max Operating Pressure Differential Light Oil 90 psi Max Operating Pressure Differential Water 90 psi Environmental Rating - Valves Indoor Outdoor Coefficient of Volume 0.22/0.17 Body Material - Valves Brass Seal Material - Valves Buna-N