Abstract: A fluid supply valve attachment device that has a tank, a fixing member in which a recessed fitting section is formed, a fluid supply valve that is inserted in and fixed to the recessed fitting section, a first seal member which seals a space between the tank and the fixing member, and a second seal member which seals a space between the fixing member and the fluid supply valve. The maximum inside diameter of the recessed fitting section is defined as D, a distance between a cross-sectional center of the first seal member and a cross-sectional center of the second seal member in a direction that a central axial line of the recessed fitting section extends in an attached state is defined as L1, and L1 is set within 2.5×D.

Abstract: A pressure reducing valve (10) includes: a valve unit (18) provided between a primary port (32) and a secondary port (34); a cylinder (12) provided downstream of the valve unit (18); a piston (14) that divides a space in the cylinder (12) into a pressure reducing chamber (38) and a pressure regulation chamber (96) and that opens or closes the valve unit 18 by sliding within the cylinder (12); and a seal member (24) that is disposed in an inner peripheral face of the cylinder (12) and that includes a slidably contacting piece (26a) that slidably contacts the piston (14) due to the pressing force of an elastic member (28). The cylinder (12) is formed of a body member (20) that defines the pressure reducing chamber (38) and a cover member (22) that defines the pressure regulation chamber (96). An annular groove (94) in which the first seal member (24) is disposed is formed at the boundary between the body member (20) and the cover member (22).

Abstract: A restriction plate is arranged at a position that is apart from a female screw portion by a distance shorter than a length of a portion of a male screw portion of an operation screw, which is screwed into a female screw portion of a plug body housing, along the axial direction in the valve-closed state. Therefore, when the operation screw is unscrewed, the operation screw contacts the restriction plate before the operation screw is completely unscrewed from the plug body housing.

Abstract: A valve device is installed on a gas tank and opens and closes a gas filling passage. The valve device includes: a housing having a housing portion therein; a first check valve that is fixed to the housing and has a through hole, through which the housing portion and the filling passage communicate with each other; and a valve pressing member. The housing has a filling port, through which the outside and the housing portion communicate with each other. The housing portion contains a filter, disposed between the filling port of the housing and the through hole of a passage member, and a valve element that is moved between the filter and the filling port by the flow of gas. When the gas in the gas tank flows into the housing portion, the valve element moved toward the filling port seats on a valve seat and closes the filling port.

Abstract: A valve device of a high-pressure tank for a vehicle has a valve box that is attached to the high-pressure tank and that houses a gas inlet opening, a gas outlet opening, a flow path connecting the gas inlet opening, the gas outlet opening and the high-pressure tank, and a valve disposed on the flow path. The gas inlet opening, the gas outlet opening, at least a portion of the flow path, and the valve are provided on a plane that intersects perpendicularly with an axis direction of the high-pressure tank.

Abstract: A component holding device includes: a fixing member that has a first inner wall surface that forms a first hole into which gas can be entered and a component can be inserted; a component holding section that is fit to the first hole of the fixing member and that holds the component; a sealing section that is provided in the first hole and that seals the component holding section to prevent water from entering into the first hole of the fixing member; and a vent path that is provided in at least one of the fixing member and the component holding section so as to communicate with a gas residual section in the component insertion hole and that discharges leaked gas in the gas residual section to outside air.

Abstract: A fluid supply valve attachment device that includes: a fixing member formed with a recessed fitting section; and a fluid supply valve provided with a protruded insertion section that is inserted and fixed in the recessed fitting section. Clearance between a reference inner peripheral surface of the recessed fitting section and a reference outer peripheral surface of the protruded insertion section is set smaller than clearance between an internal thread of the recessed fitting section and an external thread of the protruded insertion section in a state that the protruded insertion section is inserted and fixed in the recessed fitting section.

Abstract: A fluid supply valve attachment device that has a tank, a fixing member in which a recessed fitting section is formed, a fluid supply valve that is inserted in and fixed to the recessed fitting section, a first seal member which seals a space between the tank and the fixing member, and a second seal member which seals a space between the fixing member and the fluid supply valve. The maximum inside diameter of the recessed fitting section is defined as D, a distance between a cross-sectional center of the first seal member and a cross-sectional center of the second seal member in a direction that a central axial line of the recessed fitting section extends in an attached state is defined as L1, and L1 is set within 2.5×D.

Abstract: In a valve device for selectively opening and closing a flow passage formed to open on a valve seat by a valve body through a resin-made seat, a hollow portion is formed on either one of the valve body and the valve seat and receives the resin-made seat therein, the resin-made seat has a thickness so that the resin-made seat partly protrudes from the hollow portion, and when the valve body is operated to close the flow passage, the resin-made seat is compressed to bring an end surface of the valve body into contact with the valve seat.