Abstract: A valve body is provided with at one end with a threaded shank for hermetic coupling to a gas container. The valve body is further provided with a handwheel incorporating a gas status indicator device. That device includes a spring-loaded plunger having a head and a helical stem that is engaged in a cavity of a rotatable body so that an axial movement of the plunger, in opposition to a spring biasing force, results in a rotation of the rotatable body. A visible portion of the rotatable body is marked so as to provide an indication of the axial position of the plunger relative to the handwheel, to thereby indicate gas pressure.

Abstract: A flow control valve with device for indicating the status of a fluid, particularly for gas containers, which includes a body provided with an end on which a threaded shank is provided for hermetic coupling to a gas container, and a handwheel, a gas status indicator device being included within the handwheel, the device including a plunger that is constituted by a head and by a helical stem that is engaged in a cavity of a body that can rotate so that an axial movement of the plunger is matched by a rotation of the rotatable body, which has a visible portion that is marked so as to provide an indication of the status of the plunger, which can move, in contrast with a calibrated spring, between at least one minimum position, in which the head abuts against a shoulder, due to the action of the calibrated spring, and a maximum position, in which the plunger abuts against an end of the rotatable body.