According to the throttling principle of fluid mechanics, when the fluid filled in the pipeline flows through the nozzle in the pipeline, the flow velocity will cause local contraction of the fan-shaped nozzle, which will accelerate the flow velocity and reduce the static pressure, thus generating vertical pressure drop or pressure difference before and after the nozzle.

When the liquid flows out of the industrial pressure sector nozzle at high speed under the action of high pressure, the atomization process of the pressure atomization sector nozzle is different because of the different flow channel structure inside the pressure atomization sector nozzle.