Rotary atomizers are controlled droplet applicators that produce narrower droplet size range than hydraulic nozzles. It may use a rotating cup or cylindrical perforated screen to impart centrifugal energy on spray liquid and generates droplets. Within rotary atomization the liquid fed onto a rotating surface, where it spreads under the action of centrifugal forces. Rotary atomizers are typically used in process industries where possible nozzle blockage by the fluid (or slurry) may cause major problems.