Abstract: Pushbutton valve for dispensing, in the form of a spray, a liquid contained in a flexible pocket (2) which is located inside a container under pressure from a gas including a valve body (9) intended to be fixed into a dished part with the interposition of a sealing washer (13) between an open front end of the valve body and the dished part. A control stem (14) is able to slide between a position of rest and an open position. The valve body forms a chamber (C) which is isolated from the outside when the stem is at rest. The stem is held in this position of rest by a return spring. An additional gas inlet orifice (31) is provided in the lateral wall of the valve body, valve elements place the flexible pocket in communication with the chamber (C) when the stem (14) is pushed in, and isolate the pocket (2) from the chamber (C) when the valve is in the state of rest.