Air and Fuel Gas Solenoid Valve Air and Fuel Gas Solenoid Valve 2-Way/2-Position Normally Closed Media - Valves Air Fuel Gas Pipe Size - Valves 2-1/2 In. Min Operating Pressure Differential 0 psi Max Operating Pressure Differential Air/Inert Gas 5 psi Max Operating Pressure Differential Water 5 psi Indoor Outdoor Voltage 120VAC Coefficient of Volume 117 Body Material - Valves Aluminum Coil Insulation Class F Seal Material - Valves NBR