EXAIR Internal and External Air Atomizing Nozzles

EXAIR Atomizing Nozzles

In today’s market, the cost of consumable products is on the rise; especially with paints, oils, and yes, even the cost of water.  You can help ease some of that cost by being more efficient at spraying.  The EXAIR Atomizing Nozzles can accomplish this objective.  By using compressed air to shear the liquid, small, micron-sized droplets are produced.  As a reference, reducing the area of a particle by one-half will increase the surface area by eight.  With smaller diameter particles, your liquid spraying will go a long way; saving you money. 

EXAIR stocks three different body sizes in 1/8” NPT, ¼” NPT, and ½” NPT ports that support a large range of flow; so, you can create a light mist or a monsoon.  The combination of an air cap and a liquid cap controls the spray patterns and liquid flow rates.  These caps are easily interchangeable for each body size to change the spray patterns, control the amount of fluid, and reduce any downtime for cleaning.  The amount of liquid to be applied is easily adjusted by the inlet air pressure, the liquid pressure, and the liquid adjustment valve.  So, you can dial in the exact amount of fluid required for your process to stop any waste or excess.

EXAIR manufactures three families of Atomizing Nozzles; Internal Mix, External Mix, and Siphon Fed.  The Siphon Fed generates a vacuum from the compressed air to draw the liquid to the nozzle (no liquid pump is required).  The External Mix and Internal Mix require both air and liquid to be pressurized.  In this blog, I will narrow my discussion to the Internal Mix and External Mix Atomizing Nozzles.

Internal Mix

The Internal Mix Atomizing Nozzles are designed, as the name suggests, to atomize the liquid inside the nozzle.  This means that the liquid and air streams will come together just before leaving the Atomizing Nozzle.  For this type of Atomizing Nozzle, the air and liquid supplies are pressurized and independently controlled, but because of the internal nature, the pressures will have to be similar.

The Internal Mix Atomizing Nozzle can spray fluids with a viscosity below 300 CPS.  EXAIR manufactures these nozzles with stainless steel construction; making them compatible with many different kinds of liquids.  And they are used in many applications like washing, coating, cooling, quenching, and dust control.

External Mix

To expand on the External Mix Atomizing Nozzle, it atomizes the liquid outside the nozzle.  The air and liquid supplies are pressurized and can be controlled independently.  Higher viscosity fluids can be sprayed at up to 800 CPS using this type of atomizing nozzle.  Also, with the external mixing, it helps to diminish the drying effects of the solution.  EXAIR manufactures these nozzles with stainless steel construction, as well. 

No Drip Atomizing Family

What can make the Atomizing Nozzle even better?  The No Drip option is offered with all of our Atomizing Nozzles.  This patented design is used to keep the expensive liquid from dripping out of the Atomizing Nozzles during off-cycles.  When the compressed air is turned off at the nozzle, a valve inside the body will create a seal on the liquid side.  The No Drip function enhances the Atomizing Nozzles for intermittent processes as the liquid remains inside the body for quick spraying. With delicate applications, the unwanted drips will not occur and ruin the finish of your product.  Unlike some manufacturers, there is no need to run a separate compressed air line to operate the no drip function.  The Atomizing Nozzles with the No Drip option can give you the best performance in efficiency, effectiveness, and flexibility without any drips.

If you need to maximize the liquid dispersion and reduce consumption, the EXAIR Atomizing Nozzles are the products to use.  The Internal Mix and External Mix Atomizing Nozzles can shear the drops into micron-sized particles, saving expensive consumable oils and liquids.  If you have a spraying application, you can speak to one of our qualified Application Engineers.  We will be happy to help you select the correct model.

John Ball
Application Engineer

Email: johnball@exair.com
Twitter: @EXAIR_jb

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