Understanding Air Entrainment

EXAIR uses the word entrainment a lot, all of our blowoff products use the principle to amplify the air stream and increase efficiency. But, what is entrainment and what causes the phenomenon? Entrainment can be defined as a fluid that is swept along into an existing moving fluid. This brings Bernoulli’s equation into the picture. When looking at specific situations and conditions Bernoulli’s equation can show some interesting significance with gases.

Bernoulli’s Equation

Bernoulli’s equation takes into account four main variables which are Pressure (P), Density (r), Velocity (v), and a height difference (z); along with a single constant for gravity. you can see the relationship between the velocity squared and the pressure from the equation above.  Being that this relationship is a constant along the streamline; when the velocity increases; the pressure has to come down. Now we have to look at how fluids like to behave. Fluids within a system like to be at a constant pressure when at the same height and reach a state of equilibrium. This means that fluids will always flow towards a low pressure area, which means that if you create a constant low pressure area you can amplify the air stream. This is the same principle as to why airplanes can fly.

EXAIR Super Air Nozzle entrainment

Since compressed air can be an expensive utility, it is good to minimize it and maximize the surrounding entrained air. Therefore we have designed our products to use this entrainment principle to amplify the air blast while using less compressed air and more entrained ambient air. Products like our Super Air Knife can see an amplification ratio (ambient air to compressed air) of up to 40:1; this means for every 1 SCFM of compressed air used we are entraining 40 SCFM of ambient air.

EXAIR’s Super Air Knife

We use this principle for our Air Amplifiers, Air Knifes, Air Nozzles and Jets, Safety Air Guns, and our Gen4 Static Eliminators. Our goal is to save you money and give you better results in the process.  

If you have questions about any of our engineered Intelligent Compressed Air® Products, feel free to contact EXAIR or any Application Engineer.

Cody Biehle
Application Engineer
EXAIR Corporation
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Big Nozzle, Big Award…Again!

The year was 2016, and it was quite a time for sports fans:

  • Team USA dominated at the Summer Olympics in Rio de Janeiro. Swimmer Michael Phelps won five Gold Medals, and gymnast Simone Biles won a Gold Medal on her own, and another for the team event, contributing to the 46 total Gold Medals won by United States Olympians.
  • The Chicago Cubs and Cleveland Indians took the World Series to all seven games…and extra innings in Game Seven. That makes it hard to disparage either team, but the Cubs prevailed, winning the Fall Classic for the first time in 108 years.
  • World Series heartbreak notwithstanding, Cleveland sports fans were pretty happy a few months earlier when the Cavaliers cinched the NBA Championship in seven games, defeating the heavily favored Golden State Warriors…who beat the Cavs in both of their regular season games that year.

Another big winner (non-sports) that year was EXAIR Corporation’s Model EF5010SS External Mix Narrow Angle Flat Fan Pattern 1/2 NPT Atomizing Spray Nozzle…it won Plant Engineering’s Product of the Year Bronze Medal Award in the Fluid Handling category. Yes, there’s a Compressed Air category, and our products have won a TON of those too…as well as some other categories:

  • Material Handling (Line Vacs)
  • Maintenance Products (Super Air Nozzles)
  • Environmental Health (High Lift Reversible Drum Vac)
  • Automation & Controls (EFC Electronic Flow Control)
Just a few of our past Product of the Year award winners in categories other than “Compressed Air”.

Anyway, now it’s 2021, and the No-Drip version of that Atomizing Spray Nozzle – Model EF6010SS – has won Plant Engineering’s GOLD Medal Award in the Fluid Handling category. Model EF6010SS offers the same performance as the EF5010SS:

  • Liquid flow rates from 141 to 303 gallons per hour (tested with water)
  • Flat fan spray dimensions from 15″ wide (6″ from target) to 25″ wide (15″ from target)
  • Atomized spray at a distance of up to 35 feet away

And, of course, the No-Drip feature means you can instantly stop liquid flow by shutting off the compressed air supply, up to 180 cycles a minute, if needed. This is a great feature to have to cut down on the cost – and the MESS – associated with overspraying.

Our comprehensive line of Atomizing Spray Nozzles has options for most any liquid that can be sprayed, with a wide range of flow rates and pattern size/shapes. The 1/2 NPT External Mix Narrow Angle Flat Fan model is ideally suited for liquids with higher viscosities where a higher flow rate/thicker coating is needed, as opposed to a humidification or misting application, where a smaller Atomizing Spray Nozzle might be specified. Some current, successfully reported, applications include:

  • Snack food provider – applying flavoring to bulk snack materials.
  • Commercial bakery – spraying cooking oil onto pans used in a conveyor oven.
  • Sporting goods manufacturer – applying adhesive to the tops of skateboard decks to glue the grip tape on.

If you’d like to discuss a particular liquid spraying application, I’d love to help…give me a call.

Russ Bowman, CCASS

Application Engineer
EXAIR Corporation
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Looking for a Reliable Compressed Air Products Supplier?

It starts with EXAIR’s Application Engineers, gains momentum with our Customer Service Team and finishes with our high quality products that ship same day. EXAIR’s Application Engineers are the most experienced and accredited in this industry. We are the product experts across all of our 15 product lines. I have been with EXAIR going on 2 years now but have many years of experience in other industries and manufacturing processes prior to being with EXAIR. I have held positions in cost estimating, sales engineering, project engineering, purchasing, program engineering and management/manufacturing positions. I love the challenges that customers bring our way and the satisfaction that comes with providing them solutions to their process and efficiency problems while improving safety in many cases.

To be a successful application engineer at EXAIR you need to be a great communicator and listen intently to every customer. You must have a solid understanding of the customer needs and how EXAIR products can fit into their process. Having experience in injection molding, metal stampings, custom fabricating, metallurgy, castings, welding, assembly and paint lines certainly brings the knowledge to helping a customer choose the right product. The biggest challenge I had is learning all the products and performance values for each product at EXAIR. This is an ongoing process as we also customize products and add new products regularly.

I enjoy talking to each customer as no conversation is the same. We serve just about every industry and support customers around the world. Having a diverse background helps me to understand the many processes that each of our products can assist in cleaning, coating, drying, ventilating, transport, cool, etc… and gives me a great deal of satisfaction when a customer makes the purchase and has a successful experience. I hope to have a conversation with you for your next project and to help identify one of EXAIR’s products. If you have any questions or projects please contact me or any of the many Application Engineers at 800.903.9247 or by visiting us at http://www.EXAIR.com. Any of us will be sure to provide the best experience possible.

Eric Kuhnash
Application Engineer
E-mail: EricKuhnash@exair.com
Twitter: Twitter: @EXAIR_EK

Reduce Sound Levels With Engineered Compressed Air Products

A while back, I had the pleasure of assisting a customer with selection and implementation of our Super Air Nozzles, to replace open-ended blow offs on their machine tools. They installed the Super Air Nozzles after shutdown one afternoon. When he came in to work the next day (he arrived after production started), he thought there was a major problem in the shop, because (as they say in the movies right before something bad happens) “it was quiet…too quiet.” Turns out that, even though the goal was to reduce air consumption, they also reduced the sound level of the blow offs to an unexpected degree.

The copper tube used to have a crimped end that was aimed at the part in the chuck. They simply cut it off and used a compression fitting to install the Super Air Nozzle.

Another time, a metal stamping plant tried out our Model 1122 2″ Flat Super Air Nozzle on a stamping machine, using a Stay Set Hose to replace the copper tubing that was used to eject parts from the platen. They did the switch in the middle of the day…the operator at the adjacent machine noticed the dramatic noise level drop and came over to see what was wrong. Then he asked when they were getting one for HIS machine.

This loud & inefficient copper tubing blowoff was just Model 1122 2″ Flat Super Air Nozzle (and a Stay Set Hose) away from being quiet and efficient.

Both of these solutions originated with calls to discuss ways to reduce compressed air consumption costs. The fact that noise levels went down so dramatically just added to the benefits of using engineered compressed air products from EXAIR. If you’d like to find out how to make your electric bill – and your shop noise level – go down, give me a call.

Russ Bowman, CCASS

Application Engineer
EXAIR Corporation
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