Abstract: A device for the delivery of a liquid in spray form includes a motor (2) connected to a fan (3, 4) adapted to draw a flow of air and send it through at least one conduit (5, 5b), a pre-loading vessel (11) for containing a liquid to be atomized, at least one nozzle (6) located at one end of the conduit (5, 5b) for the delivery of the liquid in spray form, at least one siphoning pipe (14) with one end located inside the pre-charging vessel (11) and an opposing end located in the vicinity of the nozzle (6), and at least one pressure pipe (18) connected to the fan (3, 4) to provide a specific amount of pressurized air to the inside of the pre-charging vessel (11), characterized in having regulating elements (19, 29) adapted to regulate the pressure inside the pre-charging vessel (11).