This is a BRAND NEW OEM Intertherm/Nordyne/Miller Mobile Home furnace Gas Valve!. It's designed for STANDING PILOT Furnaces. The Intertherm Part # is 624583 (Robertshaw Model # is 7200ERCS-1) which replaces all the old #s listed below. Flip a brass fitting on the valve to convert it from NAT gas to LP gas.
The gas valve is a low voltage control (usually 24 VAC) that allow gas into the combustion chamber. It is also an adjustable regulator that insures proper gas pressure for combustion. They have a manual shut off.