A valve, a battery and a power consumption device are disclosed, the valve includes a valve body, a barrier, a first unidirectional valve core and a second unidirectional valve core. The valve body includes a fluid channel; the barrier is disposed in the fluid channel, and separates the fluid channel into a first cavity and a second cavity, the barrier is provided with a first through hole and a second through hole communicating the first cavity and the second cavity; the first unidirectional valve core is configured to close or open the first through hole; the second unidirectional valve core is configured to close or open the second through hole, opening directions of the first unidirectional valve core and the second unidirectional valve core are opposite. The valve is compact and capable of implementing a bi-directional flow of fluid.

A valve, a battery and a power consumption device are disclosed, the valve includes a valve body, a barrier, a first unidirectional valve core and a second unidirectional valve core. The valve body includes a fluid channel; the barrier is disposed in the fluid channel, and separates the fluid channel into a first cavity and a second cavity, the barrier is provided with a first through hole and a second through hole communicating the first cavity and the second cavity; the first unidirectional valve core is configured to close or open the first through hole; the second unidirectional valve core is configured to close or open the second through hole, opening directions of the first unidirectional valve core and the second unidirectional valve core are opposite. The valve is compact and capable of implementing a bi-directional flow of fluid.

A pressure relief valve to balance the pressure between a cargo tank and the ambient atmosphere is described. The valve is so arranged that the velocity of the out flowing gas jet at no time is under a preset value when the valve is in open position. The valve comprises a valve body (2) designed to act against a valve seat (1) located in a structural outlet (5a) from the cargo tank, which valve body (2) is connected to a rod (7) extending into the structural outlet (5a) opening (5). The rod (7) is being supported and guided by a frame structure (6) extending into the structural outlet (5a) opening (5) and fixed to the structural outlet (5a).

A pressure relief valve to balance the pressure between a cargo tank and the ambient atmosphere is described. The valve is so arranged that the velocity of the out flowing gas jet at no time is under a preset value when the valve is in open position. The valve comprises a valve body (2) designed to act against a valve seat (1) located in a structural outlet (5a) from the cargo tank, which valve body (2) is connected to a rod (7) extending into the structural outlet (5a) opening (5). The rod (7) is being supported and guided by a frame structure (6) extending into the structural outlet (5a) opening (5) and fixed to the structural outlet (5a).

A check valve includes a valve case, a positive pressure valve, a spring, and a negative pressure valve. The positive pressure valve is slidably disposed in a valve chamber of the valve case. The spring urges the positive pressure valve to abut on a positive pressure valve seat of the valve case. The negative pressure valve is on the positive pressure valve to abut on a negative pressure valve seat of the positive pressure valve. The negative pressure valve closes a communicating passage in the positive pressure valve in a normal state, and opens it when a pressure in the fuel tank falls to a predetermined value or less.

A check valve includes a valve case, a positive pressure valve, a spring, and a negative pressure valve. The positive pressure valve is slidably disposed in a valve chamber of the valve case. The spring urges the positive pressure valve to abut on a positive pressure valve seat of the valve case. The negative pressure valve is on the positive pressure valve to abut on a negative pressure valve seat of the positive pressure valve. The negative pressure valve closes a communicating passage in the positive pressure valve in a normal state, and opens it when a pressure in the fuel tank falls to a predetermined value or less.

A relief valve includes a first valve body having an annular shape including a peripheral edge portion, which is pressed against a hole edge portion of the communication hole, and an opening in a central portion of the annular shape; a second valve body pressed against a hole edge portion of the opening of the first valve body so as to close the opening; a first spring including a compression spring or a tension spring for pressing the first valve body against the hole edge portion of the communication hole; and a second spring including a compression spring or a tension spring for pressing the second valve body against the hole edge portion of the opening, wherein the first region and the second region communicate with each other.

A flow control valve including a passage, and first and second valve devices disposed in the passage and comprising first and second valve members, valve seats, and seal members, respectively. Each valve member is movable for opening and closing the passage. Each seal member may seal between the corresponding valve member and seat. The first valve member moves in a first direction toward a closing position of the first valve device. The second valve member moves in a second direction, opposite the first closing direction, toward a closing position of the second valve device. The first or the second seal member may include a base portion attached to one of the corresponding valve member and the corresponding valve seat, a lip extending from the base portion, and a turning-up inhibiting device configured to inhibit the lip from turning up when the corresponding valve member is in the closing position.

A flow control valve including a passage, and first and second valve devices disposed in the passage and comprising first and second valve members, valve seats, and seal members, respectively. Each valve member is movable for opening and closing the passage. Each seal member may seal between the corresponding valve member and seat. The first valve member moves in a first direction toward a closing position of the first valve device. The second valve member moves in a second direction, opposite the first closing direction, toward a closing position of the second valve device. The first or the second seal member may include a base portion attached to one of the corresponding valve member and the corresponding valve seat, a lip extending from the base portion, and a turning-up inhibiting device configured to inhibit the lip from turning up when the corresponding valve member is in the closing position.

A valve with a shuttle for use in a flow management system is capable of bypassing a backflow.