•  Assures safety by preventing fuel from returning to the fuel filler opening.

•  The non-return valve is installed to the fuel-filler pipe.

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•  A single valve type has been adopted for the non-return valve.

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•  Normally, the valve is closed as shown by the dotted line in the figure. When refueling, it opens as shown by the solid line due to the force caused by the flow of fuel. When refueling is finished, the valve returns to the normal valve position by spring force.

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