After forming a certain distance with the nozzle, the full cone or hollow cone pattern produced by many nozzles will be broken down into mist/mist. If a cone pattern is required, it is not desired to break down into the real fog. But for some applications, the spray needs to be broken down into a truly uniform mist. Therefore, there are many nozzles specifically designed to produce this effect.

　　The haze pattern is characterized by a low flow rate with very small droplet size, with little effect. Generally, this pattern will be used for evaporative cooling, wetting, or humidification applications.

　　Fog, mist, or spray?

　　Whether a given discharge is a mist, mist or spray depends on the average droplet size.

　　The Sauter average droplet size of dry fog is between 10 and 20 microns.

　　The average droplet size of the wet mist Sauter is between 20 and 30 microns.

　　The Sauter average droplet size of the mist is between 30 and 60 microns.

　　Any spray larger than 60 microns will be sprayed.

　　When the hydraulic pressure rises, the hydraulic nozzle will produce finer and finer droplets. Therefore, a nozzle that generates mist at a pressure of 5 bar is likely to generate mist at a pressure of 15 bar. This means that the terms mist nozzle and fine mist sprayer pump are usually interchangeable because depending on the operating pressure, the same nozzle is likely to be able to produce mist or mist at the same time.

　　Mist/mist nozzle design variants

　　There are three common designs of hydraulic spray nozzles:

　　Small orifice atomizing nozzles work by forcing the fluid to flow through very small orifices. The turning force breaks the fluid into fine droplets.

　　The working principle of the impact atomizing nozzle is to impact the fluid on the pin directly below the outlet hole. This will break up the liquid into very fine droplets.

　　The spiral atomizing nozzle works by impinging fluid into a spiral shape. This will shatter the liquid into mist or mist. Operating at high temperatures

　　Axial swirl hollow cone nozzle can also be used for atomization

　　Disinfection room spray

　　Air atomizing nozzle

　　According to this air atomizing nozzle is also commonly used for mist and mist generation. These pneumatic nozzles use compressed air to decompose the sprayed fluid and achieve very fine atomization even at low fluid pressure. Air atomizing nozzles can produce a variety of different initial spray patterns, but due to the size of small droplets at a certain distance from the nozzle, they will form mist or mist.