PROBLEM TO BE SOLVED: To provide a control method for a carburetor for liquefied fuel gas and a pressure reducing valve and control unit for the carburetor for controlling the number of carburetors excellently without unnecessarily changing the number of operating carburetors by appropriately carrying out pressure control and flow control of the carburetor, carrying out excellent control operation of a flow rate control valve at the time of flow control, and keeping the ouput pressure of the pressure reducing valve within a range of working pressure whenever each shaft stops starting, loads are cut off, or only a single carburetor overworks within a station. SOLUTION: In the control method for the carburetor for the liquefied fuel gas, a fuel flow request instruction in a thermal power plant is used as the control object of the number of operating carburetors or the flow rate control valve for liquefying the liquefied fuel gas to feed the fuel gas. Also, in the control method for the pressure reducing valves for the liquefied fuel gas, the fuel flow request instruction in the thermal power plant is used as a control object for controlling the outlet port pressure of the pressure reducing valve which changes in accordance with consumption of the fuel gas in the thermal power plant. COPYRIGHT: (C)2006,JPO&NCIPI
