Valve and reservoir(s) for pressurized fluid

A valve for pressurized fluid comprising a body housing a fluid circuit having an upstream end configured to be placed in communication with a reserve of pressurized fluid and a downstream end configured to be placed in communication with a user of fluid, the circuit comprising a collection of valve shutter(s) comprising at least one shutoff valve shutter allowing the circuit to be closed or opened, the valve comprising a member for manually controlling the collection of valve shutter(s), the control member being mounted thereby allowing the body to move between a rest position in which the collection of valve shutter(s) is in a position in which the circuit is closed and an active position in which the control member actuates the collection of valve shutter(s) into a position in which the circuit is open with a first bore section, the valve comprising a mechanism for locking the control member in the rest position, the locking mechanism comprising a manual actuator mounted with the ability to move on the body between a locked first position that locks the control member to prevent movement from the rest position toward the active position, and a second position in which the control member is unlocked allowing movement from the rest position toward the active position, in the unlocked second position, the actuator placing the collection of valve shutter(s) in a position in which the circuit is open to a second bore section, wherein the collection of valve shutter(s) comprises two distinct shut-off valve shutters able to move with respect to respective seats and in the open position respectively defining the first bore section and the second bore section, the two valve shutters being controlled by the control member and by the actuator, respectively, and in that the two distinct shut-off valve shutters are arranged in series in one same line of the circuit and in that the two shutoff valve shutters are controlled by at least one mobile pushrod controlled by the control member and by the actuator and in that the movement of the actuator from the locked first position toward the unlocked second position moves the pushrod over a first travel that actuates the opening of a first valve shutter(s) into an open position with the second bore section for the circuit, and in that the subsequent movement of the control member from the rest position toward the active position moves the pushrod over a second travel actuating the opening of the second valve shutter into a position in which the circuit is open with the first bore section.