Atomizing Spray Nozzles – Categories and Selection

EXAIR Atomizing Nozzles are a reliable way to clean, cool or coat a wide variety of products. Constructed of 303ss, the units are extremely durable, provide superior corrosion resistance and are able to withstand temperature up to 400°F.

No Drip Atomizing Nozzle
EXAIR Atomizing Spray Nozzles atomize fluid in a wide range of spray patterns for various applications.

The Atomizing Nozzles are separated into 3 categories – Internal Mix, External Mix and Siphon Fed:

Internal Mix Atomizing Nozzles require a pressurized liquid source and compressed air source and mix the two flows inside the air cap to produce a fine mist of atomized liquid. These nozzles are better suited for applications that don’t require independent control of the air or liquid and are suitable for fluids up to 300 cP.

External Mix Atomizing Nozzles require pressurized liquid and air as well, but allow for independent control to reach higher flow rates with more precise control. With the liquid and air being mixed external to the nozzle, they are able to handle higher viscosity fluids (300+ cP).

Siphon Fed Atomizing Nozzles are the ideal choice for applications without a pressurized liquid source. The liquid can be gravity fed or pulled from a siphon height up to 36″.  Due to the liquid not being pressurized, these nozzles are limited to fluids of 200 cP or less.

With so many choices, it may seem somewhat cumbersome in making the correct selection. To simplify the selection the process, there are 5 common considerations:

  1. How much liquid flow do I need?
  2. Is the liquid pressurized?
  3. What is the viscosity of the liquid?
  4. How wide of an area needs to be treated?
  5. What type of spray pattern fits the application?

The answers to these questions will allow you to make the best selection to fit your needs. Of course if you still are unsure, you can rest easy as one of our engineers is readily available should you require additional assistance.

Justin Nicholl
Application Engineer



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