No Drip Internal Mix Atomizing Nozzles

Eliminate drips to conserve valuable liquids and improve product finishes!  EXAIR’s patented No Drip Atomizing Nozzle provides the same great performance as the the standard atomizing nozzles with the added benefit of positive liquid flow stoppage when the compressed air is shut off.

The No Drip option eliminates the occurrence of post spray liquid flow that results in unwanted drips that can mar a finish on painted or coated surfaces.  Also, excess liquid loss is minimized saving on expensive materials like chemicals or coatings.  When the compressed air is shut-off, the No Drip nozzle positively seals off the flow, eliminating the chance for a drip or lost liquid. Only one compressed air line is needed, as the line to combine and atomize the liquid also provides the no drip operation and control.

The No Drip Atomizing Nozzles are available in (3) types – Internal Mix, External Mix, and Siphon Fed.

The Internal Mix type operates under the principle that the air and liquid come together and mix ‘internal’ to the nozzle.  This type provides the finest atomization and smallest droplet size. The Internal Mix type of nozzle can be used with liquids up to 300 cP in viscosity.  Both the air and liquid sides are pressure fed.  The No drip Internal Mix Atomizing Nozzles are best for pressure fed applications not requiring independent air and liquid control.

A No Drip Internal Mix Flat Fan Nozzle applying anti-corrosion fluid to stamped parts

The No Drip Atomizing Nozzles are available in (3) sizes – 1/8, 1/4, and 1/2 NPT – to provide a wide range of flow rates and pattern sizes.  The No Drip feature does not impact the flow rates compared to the standard models.  Minimum air pressure operation is 30 PSIG for the 1/4 and 1/2 NPT, and just 20 PSIG for the 1/8 NPT models.

Like the standard Internal Mix Atomizing  Nozzles, spray patterns include narrow and wide angle round, flat fan, deflected flat fan and a 360° hollow circular pattern offering a wide selection to best meet the application needs.

Operation at up to 180 spray cycles per minute is possible.  Air and Liquid Caps can be switched out to change the pattern and flow rates.

Typical Applications

  • Painting
  • Coating
  • Rinsing
  • Cooling
  • Quenching
  • Wetting
  • Humidification
  • Dust Control


  • No post spray drip
  • Adjustable
  • Easily used with EFC
  • Minimizes air and liquid consumption
  • All stainless steel construction
  • Fine atomization
  • Interchangeable liquid and air caps
  • Compact

If you need an Atomizing Spray Nozzle or any of the EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.

Brian Bergmann
Application Engineer

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EXAIR Atomizing Spray Nozzles Explained

From their introduction just a few short years ago, to the addition of ½ NPT units more recently, EXAIR’s line of Atomizing Spray Nozzles has quickly become one of our most diverse product lines. We’ve got:

*44 Models to choose from. Technically, 88, if you count the patent pending No-Drip feature that they’re all available with.  More on that in a minute.

*Numerous styles:
Internal Mix Spray Nozzles provide the widest range of adjustment. Changes to air pressure, liquid pressure, and the needle valve position will all change the flow rate and pattern. The ¼ NPT models come in Narrow or Wide Angle Round, Flat Fan, Deflected Flat Fan, and Hollow Circular Patterns.
The ½ NPT models come in Narrow or Wide Angle Round, Flat Fan, or Hollow Circular Patterns.

Narrow Angle Round Pattern Internal Mix Atomizing Spray Nozzle
Narrow Angle Round Pattern Internal Mix Atomizing Spray Nozzle

External Mix Spray Nozzles give you the option of changing the flow rate and pattern independently, by changing the liquid or air supply pressures, respectively. The ¼ NPT models come in Round and Narrow or Wide Angle Flat Fan patterns. The ½ NPT comes in Narrow Angle Flat Fan pattern only. These are also the best choice for higher viscosity fluids.

External Mix Atomizing Spray Nozzles offer independent adjustment of flow rate and pattern.
External Mix Atomizing Spray Nozzles offer independent adjustment of flow rate and pattern.

Siphon Fed Spray Nozzles are used when it is impractical or undesirable to pressurize the liquid supply. By changing the siphon (or gravity) height, these nozzles, unit for unit, provide the widest adjustability in flow rate. The ¼ NPT models come in Flat Fan and Narrow or Wide Angle Round patterns. The ½ NPT comes in Round pattern only. Because they rely on an unpressurized feed of liquid, these are best suited for liquids with lower viscosities.

No-Drip Feature: All of our Atomizing Spray Nozzles are available with a No-Drip feature…they use the compressed air supply to open the valve, and when it’s turned off, so is the nozzle – with no air supply, an internal needle valve positively stops the flow of liquid.

  • Availability. All of these are in stock, ready to ship same day.
  • Mounting Brackets. Our “clip” style brackets provide for quick and easy mounting & support.
  • Expertise. This is where the rubber hits the road. Or, perhaps I should say, where the coating hits the wood, the paint hits the steel, the coolant hits the surface, etc. By that, I mean that whatever you want to spray, mist, coat, quench, wet down, cool, rinse, etc., we’re ready to discuss your particular application and help you find the right Spray Nozzle. Call us to find out more.

Russ Bowman
Application Engineer
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No Drip Atomizing Nozzle Improves Deep Drawn Metal Process

The other day, I had the pleasure of helping a caller select an Atomizing Spray Nozzle for a particular application. They needed to apply a thin, quick drying coat of vanishing oil to the inside diameter of a round, deep drawn metal part. They were currently flooding the ID with it, and the part had to sit overnight to dry.

Since it was a cylindrical hole, it sounded like an ideal application for a Round Pattern nozzle, and, since they didn’t have an easy way to pressurize the oil source, we selected a Model SR2040SS No-Drip Siphon Fed Round Pattern Atomizing Spray Nozzle. By adjusting the siphon height and air pressure applied, they were able to quickly achieve the desired flow pattern and coating thickness.


Now, they’re able to take the part directly to the next step in their fabrication process, without the overnight drying cycle.

Russ Bowman
Application Engineer
EXAIR Corporation
(513)671-3322 local
(800)923-9247 toll free
(513)671-3363 fax

The Heat is On!

Well, it is here.  The middle of summer cannot be denied in Cincinnati this week.  We have had a high temperature of at least ninety degrees the last five days with near 100% humidity.  These are the days when you have to either work very earlier in the morning or very late at night to get any yard work done.  You’ll notice that the most of our blogs the last couple weeks have been about keeping things cool, like Cabinet Cooler systems, or High Temperature Cabinet Coolers.  I’m not one to buck a trend, so I’m going to talk about cooling as well, but I will talk about cooling a manufactured product.

A customer this week was designing a new plastic extrusion system and he needs to quickly cool four plastic extrusions strands from 400 degrees Fahrenheit to 120 degrees at a fairly high feed rate.  In the past the customer had used an immersion bath followed by a blow off station using EXAIR’s Air Knives, Air Wipes, or Super Air Nozzles depending on the plastic extrusions geometry.  The immersion bath would use the specific heat of the water to quickly take away the heat from the extruded plastic.  This process had worked well for him in the past, but the immersion bath was expensive to build and maintain.  For these reasons, he was looking for an alternative.

What is going to cool better than water?  The water in the immersion bath has a very high specific heat, which is what makes it such a good material for cooling large amounts of heat very quickly.  Specific heat is the amount of energy it takes to raise 1 pound of mass 1 degree Fahrenheit.  One British Thermal Unit (BTU) is the amount of energy it takes to heat or cool one pound of water one degree.  A BTU is 1,055 Joules, which is a very high specific heat compared most other common materials.  So we can’t change the immersion liquid, but could we come up with a better process?

Well of course we can.  We can use both the specific heat of water and the latent heat of water.  The latent heat is the amount of energy water takes to evaporate.  The latent heat of water is 970.4 BTU per pound.  If we can use both the specific heat of water and the latent heat of water, we can increase our cooling and not need a large, expensive immersion bath.  The customer came up with the idea of using Atomizing Spray Nozzles and a blow off station to get the same amount of cooling but without needing a water bath.  By spraying a fine mist of water onto the extrusions, we create almost the same amount of conduction with the water and the plastic.  The water takes out the energy of rising from room temperature to its boiling point, then takes out the energy of evaporating, and then the air dries the remaining water and takes away any more heat that may be remaining.

Dave Woerner
Application Engineer


It Is NOT Time For “The Gun Show”…

…but it IS time to release the long awaited, much debated, and maybe over-rated next installment in the video saga of Professor Penurious.  You’ll laugh…you’ll cry…you’ll kiss three perfectly good minutes of your life good-bye.

Russ Bowman

Application Engineer

EXAIR Corporation

(513)671-3322 local

(800)923-9247 toll free

(513)671-3363 fax