The liquid being sprayed passes through a removable tapered nozzle (A) which accelerates the liquid and projects the flow into the tapered opening of the venturi (B).
This creates a vacuum that causes air to be sucked in through the slots marked (C).
The mixture of air and liquid is compressed as it passes through the mixing chamber (D) and is then sprayed through the fan nozzle (E).
The emitted spray contains large droplets filled with air bubbles but virtually no fine drift prone droplets. The droplets explode on impact with the target to produce similar coverage to conventional finer sprays.