Solenoid Valve Less Coil Solenoid Valve Less Coil 2-Way Normally Closed Media - Valves Air Steam Water Pipe Size - Valves 3/8 In. Min Operating Pressure Differential 2 psi Max Operating Pressure Differential Air/Inert Gas 200 psi Max Operating Pressure Differential Light Oil 200 psi Max Operating Pressure Differential Water 200 psi Environmental Rating - Valves Indoor Outdoor Coefficient of Volume 2.20 Body Material - Valves Brass Seal Material - Valves Buna-N