The Maxitrol RV12LTF-L3L3-0004 Natural Gas Regulator is a gas pressure control component designed for compatible commercial and industrial heating equipment. It regulates incoming natural gas pressure by adjusting the gas flow to maintain a consistent downstream pressure for proper burner operation. Commonly used in gas-fired furnaces, boilers, unit heaters, and commercial HVAC system... https://www.partshnc.com/rv12ltf-l3l3-0004-maxitrol-natgasregulator-fixedsetting