Dispositivo di regolazione di portata perfezionato per la regolazione della portata di un gas in ingresso ad una caldaia a gas

A flow rate adjustment device (1) for adjusting the flow rate of a gas in input to a gas boiler, comprising: a valve body (11) which forms a path for the gas between an inlet (20) adapted to be connected to a gas delivery duct and an outlet (50) adapted to be connected to a duct for feeding to the burner of a boiler, and a passage orifice (31) for the passage of the gas from the inlet (20) toward the outlet (50). The flow rate adjustment device (1) further comprises: - an adjustment flow control element (40) which can move between a closed position, in which it occludes the passage orifice (31) so as to bring to zero the flow rate of gas in output from the outlet (50) and a maximum opening position, in which it clears the orifice (31) so as to allow a maximum flow rate of gas in output from the outlet (50), the adjustment flow control element (40) being also arrangeable in positions that are intermediate between the closure position and the maximum opening position, so as to allow the adjustment of the flow rate of the gas in output according to its position; - an electric motor (12) configured to move, by means of at least one kinematic transmission element (13), the adjustment flow control element (40) in order to position it selectively in one of the positions so as to adjust the flow rate of the gas in output.