There is provided a valve device including: a housing; a float valve; and a pressure adjusting valve. A first valve seat is formed from a peripheral edge of a valve hole. An accommodation portion is provided in a protruding manner from a surface of a partition wall. An inner periphery of the accommodation portion is provided with a reduced diameter portion and an increased diameter portion. A height of an upper end of the reduced diameter portion is equal to or greater than a front surface of the pressure adjusting valve in a state where the pressure adjusting valve is in contact with the first valve seat. The pressure adjusting valve is configured to be beyond the upper end of the reduced diameter portion when the pressure adjusting valve is raised to a maximum due to an increase in pressure in a fuel tank.

A pressure regulating valve includes a housing defining a fluid passage between at least one inlet and one outlet. A ball valve is positioned within the fluid passage and biased by a spring. A cam is in biased engagement with the spring and ball valve to regulate pressure of fluid passing through the fluid passage. The cam includes multiple faces, each face milled to a different depth, and means for adjusting a position of the cam relative to the ball valve, such that a different face of the cam enters into biased engagement with the spring of the ball valve, thereby altering a compression force exerted by the spring on the ball valve. The faces of the cam correspond to increments of desired pressure adjustment, such that rotation or movement of the cam surface between different faces results in discrete changes to the pressure of fluid passing through the valve.

A pressure regulating valve includes a housing defining a fluid passage between at least one inlet and one outlet. A ball valve is positioned within the fluid passage and biased by a spring. A cam is in biased engagement with the spring and ball valve to regulate pressure of fluid passing through the fluid passage. The cam includes multiple faces, each face milled to a different depth, and means for adjusting a position of the cam relative to the ball valve, such that a different face of the cam enters into biased engagement with the spring of the ball valve, thereby altering a compression force exerted by the spring on the ball valve. The faces of the cam correspond to increments of desired pressure adjustment, such that rotation or movement of the cam surface between different faces results in discrete changes to the pressure of fluid passing through the valve.