Rotary atomizers use a high speed (Upto 18000 RPM.) rotating disk, cup or wheel to discharge liquid at high speed to the perimeter, forming a hollow cone spray. The rotational speed controls the drop size. Spray drying and spray painting are the most important and common uses of this technology.
Many industries use processes like evaporative cooling, meteorology, printing, medical applications, spray combustion, coating, and drying, which need to convert a large mass of liquid into a dispersion of smaller droplets of a size range of microns. Various spray devices for the above-mentioned conversion have been developed over time, such as atomizers, sprayers, nozzles, and applicators. The spray generated by these devices can be viewed as liquid droplets submerged in a continuous phase of gases. This spray can be generated in a variety of methods. Generally, it is done by producing a high speed between the phase of gases and the submerged liquid to be atomized. These devices achieve this releasing the liquid at very high speed into the unagitated air. This same principle is used in a Rotary Atomizer.