Steam and Hot Water Solenoid Valve Steam and Hot Water Solenoid Valve 2-Way/2-Position Normally Closed Media - Valves Hot Water Steam Pipe Size - Valves 1/4 In. Min Operating Pressure Differential 0 psi Max Operating Pressure Differential Hot Water 210 psi Max Operating Pressure Differential Steam 110 psi Environmental Rating - Valves Indoor Outdoor Voltage 120VAC Coefficient of Volume 0.52 Body Material - Valves Brass Coil Insulation Class H Orifice Dia 5/32 In.