Abstract: A butterfly body provided with a valve body having a through duct, a butterfly valve moving on command within the through duct in order to regulate the flow of fluid through this through duct and a device for moving the butterfly valve mechanically coupled to this butterfly valve in order to be able to vary, on command, the position of the latter within the duct, so as to control the flow of air flowing through the through duct, the valve body being made entirely from plastic and having, embedded within it, a bushing of metal, within which the electrical actuator controlling the displacements of the butterfly valve is adapted to be housed.