Atomizing Spray Nozzles – Making The Case For Internal Mix

If you’ve ever cleaned around the house (and who hasn’t?), you’re probably familiar with atomized liquid spraying…it’s what happens when you squeeze the trigger on that bottle of cleaner that breaks down the stove top grease in the kitchen and the ring-around-the-tub in the bathroom.

There’s a variety of industrial and commercial applications that require an atomized liquid spray too…applications that are beyond the scope of an operator with a trigger-operated spray bottle. That’s where EXAIR Atomizing Spray Nozzles come in. We have three types: Internal Mix, External Mix, and Siphon Fed. Depending on what you want to spray, and how you want to spray it, one of these is likely going to work better than the others for you. Today, we’re going to examine the Internal Mix Atomizing Spray Nozzles.

Internal Mix Atomizing Spray Nozzles are the perfect choice for fine mist and precise control.


Better mist: Because the liquid & air come together inside the air cap, this results in very fine atomization.

Range of adjustment: Regulating either the liquid or air pressure supply will change the flow rate AND the flow pattern, giving each individual nozzle a wide performance band.  The needle valve can “fine tune” the flow and pattern with even greater precision.

Area of coverage: With five patterns (Narrow or Wide Angle Round, Flat Fan, Deflected Flat Fan, and 360° Hollow Circular) and 72 distinct models to choose from, you can get spray patterns from 2″ (1/8 NPT Narrow Round Model AN8010SS) to 13 feet (1/2  NPT 360° Hollow Circular Model AT5010SS.)

Also, they can spray the liquid mist up to 40 feet away!

Flow rate: Again, because of the many models available, you can get from 0.6 gallons/hour (Model AN8010SS again) to 264 gallons/hour (1/2 NPT Wide Angle Round Model AW5030SS.)


No-Drip option: The standard Models have a needle valve, which, as mentioned above, gives you the ability to make minute changes to the flow rate & pattern.  If the application calls for rapid on/off control, or the chance of an errant drip after flow is not stopped might be a problem, the needle valve can be replaced with a No-Drip assembly.  This positively shuts off liquid flow, at the exit of the liquid cap, when air pressure is secured.

Instant on/off control by stopping the air flow is possible with the No Drip feature, available on any Atomizing Spray Nozzle

Easy installation: All of our Atomizing Spray Nozzles have female NPT (1/8, 1/4, or 1/2) ports.  The 1/8 and 1/4 NPT models can be adequately supported – and positioned – with a Stay Set Hose, and all models (even the 1/2 NPT) can be used with an appropriately sized Swivel Fitting.  If you want to use your own tubes or hoses, we’ve got “clip-in” style Mounting Brackets.

Mounting Brackets made for quick and easy installation.

Interchangeability: The only difference between any model of the same-size Atomizing Spray Nozzle is the Liquid and/or Air Cap.  If your application’s liquid spray requirements change, or vary, you don’t need to replace the whole nozzle; just one (or in some cases, both) of the caps.

Internal Mix Atomizing Spray Nozzles are ideal for liquid viscosity up to 300cP and in situations where the liquid is (or can be) pressure fed.  If you’d like to discuss a liquid spraying application and/or product selection, give me a call.



New Atomizing Spray Nozzles That Will Change Your Spraying Process

EXAIR has continued to build on a large catalog of Intelligent Compressed Air Products. In catalog 27 we introduce (2) new Atomizing Nozzles to add to our product’s functionality and versatility. Today, I want to talk about one of the spray nozzles we added. Don’t worry! Next week, I will talk about the second nozzle, if you must look ahead follow this link.

Deflected fan in use Deflected Fan

Our new nozzle is the Internal Mix Deflected Fan Nozzle. The nozzle produce a flat fan of atomized liquid at a right angle to the nozzle’s orientation. The nozzle is designed for pressure fed application, where the pressurized liquid does not need to be controlled independently from pressurized air. In cases where space is limited, the directed flat fan frees up over 3 3/4″ extra inches of height clearance on the standard nozzle. With the no drip spray nozzle, it can gain you over 4 inches of clearance. This clearance can be very important when you consider the coverage you gain in a tight space.

Deflected Fan Advantage

Let me give you an example. A customer is running a 28 inch conveyor of machined parts through a 6″ tunnel and wishes to spray a solvent across the parts evenly.  In the past we would have needed to use the AF2010SS No Drip nozzles.  The AF2010SS nozzle would have done a great job, but the nozzle would need to be mounted at the top of the tunnel.  The overall length of the nozzle would limit the spray distance to 2 3/4″ inches.  With only 2 3/4″ of spray, it would require 11 nozzles to cover the 28″ span.  With the AD2010SS the bulk of the nozzle and the no drip body can be mounted behind the spray nozzle, which allows the spray distance to be 5 1/2″ which would cover a wide 8 1/4″ area.  With 8 1/4″ of coverage, what would have required (11) nozzles now only requires (4) nozzles.

Dave Woerner
Application Engineer