PURPOSE: To prevent fuel liquids from being mixed by a method wherein first and second switching valves are switch-controlled, and a pump is drive- controlled, and a fuel liquid in a fuel storage tank is made to circulate through a first fuel feeding pipe, general purpose pipe and second replenishing pipe.
CONSTITUTION: One-end sides of general purpose pipes 4A-4C are selectively connected to first fuel-feeding pipes 2A-2C and first replenishing pipes 14A-14C by the switching of first switching valves 3A-3C. Also, the other end sides of the general purpose pipes 4A-4C are selectively connected to second fuel feeding pipes 6A-6C and second replenishing pipes 15A-15C by the switching of second switching valves 5A-5C. Then, at the time of replenishments of fuel liquids A, B, C, a suction pipe 9 is selectively connected to either one of the first replenishing pipes 14A-14C by the switching of third switching valves 11, 12. Thus, fuel liquids in fuel storage tanks 1A-1C are made to circulate in the first fuel-feeding pipes 2A-2C, general purpose pipes 4A-4C and second replenishing pipes 15A-15C. Therefore, fuel liquids can be assuredly prevented from being mixed.
YOYASU MITSUHARU
SAKAUCHI SATOSHI
