It is designed for air, gas, and water media, with a maximum operating pressure differential of 100 (AC) and 90 (DC) for air/inert gas, and 100 (AC) and 100 (DC) for water. This GC VALVES brand 1 1/2" NPT, 2-Way Brass Solenoid Valve is closed and has a Viton seal material. It has a voltage of 120/60 and a 110/50, with an orifice diameter of 1-1/4".