Abstract: An electronic pressure reducer for liquid petroleum gasses comprises a heat exchanger (2,3) located upstream of an evaporation chamber (4) connected to a pressure reducing valve (5); the chambers (13,14) of the reducing valve (5) are separated by a passage section (15) for the fuel in the state of superheated vapor; the area of the passage section (15) is changed by a conic closing device (16) manoeuvred by a step motor (17) controlled by the central unit (6); the control central unit (6) defines the displacement of the conic closing device (16) from a first position of maximum flow to a second position of minimum flow by changing the area of the passage section (15), the dimension of which defines the flow and the pressure of the fuel coming out of the reducing valve (5) through an outlet orifice (18) connected to a metering valve (10).