Abstract: The present invention refers to an automatic flow control valve which comprises two water passage stages, and it is installed in electric water-heating appliances, such as showers and taps, the purpose of which is to control the activation of the electrical resistance according to the pressure and water flow of the hydraulic system. More specifically, the present invention refers to a flow control valve comprising a simple and mainly efficient structure constituted of a mobile body (10) provided with a central orifice for the through-passage of water (11), which is disposed on a return component (12) and positioned on the water outlet channel (8) or on another water passage inside the heating appliance.