The liquid is fed into the inner space of the KSD nozzle, swirls and emerges as a hollow cone. The atomizing medium is fed to the KSD nozzle and emerges through a defined ring gap. Immediately after leaving the KSD nozzle, the liquid is thoroughly mixed with the atomizing medium. The hollow cone is transformed into a full cone with a fine droplet spectrum.
The fineness of the droplet spectrum significantly depends on the atomizing medium/liquid ratio. The fineness of the droplet spectrum increases as the atomizing medium/liquid ratio increases.
Due to the principle of external mixing used in the KSD nozzle, liquid and atomizing medium do not influence each other when the upstream pressure changes. Since the media are mixed outside the KSD nozzle, this nozzle is also suitable for using steam as atomizing medium.
KSD nozzles have optimum emergency running properties in the event of failure of the atomizing medium, since the liquid is still atomized as a hollow cone in such cases. However, the droplet spectrum in this case is not as fine as when an atomizing medium is used.