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Converters are a combined two-stage regulator and vaporizer. It receives a liquid fuel at tank pressure from the filter fuel lock and reduces that pressure in two stages to slightly less than atmospheric. When the engine is cranking or running, a partial vacuum is created in the fuel line to the carburetor, which opens the regulator, permitting fuel to flow to the carburetor. In the process of reducing the pressure from tank of approximately 180 psi, the liquid LPG expands as it vaporizes, causing refrigeration. To compensate for the cooling effect and to assist in vaporization, water from the engine cooling system is circulated through a heat exchanger. The fuel flow is sealed off when the engine is stopped. IMPCO makes various sizes of converters to suit a wide range of horsepower applications. These converters are also available with a variety of options.