“Free” Ambient Air Entrainment w/ EXAIR’s Super Air Amplifiers

When working with a cooling application, many customers will immediately look to the Vortex Tube and Spot Cooling product lines. While this may be the best solution for some applications, cold air is not always the best method that we have available for cooling. EXAIR’s Super Air Amplifiers are very effective at reducing the temperature of a part without requiring cold air. The Super Air Amplifiers get their name due to their ability to entrain ambient air and “amplify” the supplied compressed air. You’ll often see us referring to the air amplification ratios achieved with our products. This is a ratio of the supplied compressed air relative to the entrained “free” air that comes from the ambient environment.

Due to their ability to entrain large amounts of ambient air, we can move a high volume of air across the surface of the part and quickly lower the temperature. I like to compare this to blowing on a hot cup of coffee just as it’s been brewed. The temperature of the air coming from your mouth is around 98.6°F, the same as your body temperature. Coffee can be as hot as 185°F when fresh. Due to the temperature differential between your breath and the hot coffee, we’re able to achieve a reasonable amount of cooling just by simply blowing across the surface. Typically, when the target temperature of the part or material needs to be around ambient temperature or higher; the best solution for cooling is going to be a Super Air Amplifier.

EXAIR’s Super Air Amplifiers achieve air amplification ratios ranging from 12:1 on our smallest units and up to 25:1 for our 4” and 8” models. EXAIR’s Super Air Amplifiers utilize a patented shim design to maintain critical positioning of component parts. This allows a precise amount of compressed air to be released at exact intervals toward the center of the Super Air Amplifier. This creates a constant, high velocity outlet flow across the entire cross-sectional area. Free, ambient air is entrained through the unit, resulting in high amplification ratios. The balanced outlet airflow minimizes wind shear to produce sound levels far lower than other similar air movers.

Super Air Amplifiers are supplied with a .003” thick shim that is ideal for most applications. Flow and force can be increased by replacing the shim with a thicker .006” or .009” shim. The flow of air is also controlled by adjusting the input pressure supplied to the amplifier. Higher pressures increase both the force and flow, while lower pressures decrease both force and flow. All Super Air Amplifiers are available in kits that come with a shim set as well as a suitably sized pressure regulator and auto-drain filter.

EXAIR has a solution for you if you need to move A LOT of air. Reach out to an Application Engineer today if you have an application that you believe could be served with a low-cost, simple solution!

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

CE Compliance

These words elicit multiple responses and emotions in individuals depending on the context in which they are used, and the background of the person hearing or saying the words. In this day and age, no one likes to be told what to do, to conform to comply. If you aren’t different you are the weird one, right??? Following the rules is for the weak??? Social media has made it easy for keyboard warriors to push back and fight the standards, the rules and the laws. Some of this has led to great change, and some has led to great disaster. Thankfully, most of us understand the need for compliance in marketable goods and services. Standards, policies, regulations, compliance, etc… These things lead to repeatable quality products and services that businesses, and consumers depend on.

Have you ever wandered what the CE mark really means? Let’s dive in and find out. First off, CE is short for the French words Conformité Européenne or European conformity. It means that a manufacturer has taken the responsibility for compliance of a product meeting all European Health, Safety, performance, and Environmental requirements. This is a required (EU Legislation) certification for most products that are sold in the European Economic Area (EEA). The CE markings on a product assure that the product can be sold in any EU country, regardless of the country of origin. It has become an acceptable standard for much of the rest of the world as well, it just holds no weight other than in Europe.

At EXAIR we go to great lengths to lead the way in standards compliance. Each of our products are engineered with the best technical knowledge, and perform at peak efficiency. All of our compressed air products comply with OSHA’s Safety Requirements (29 CFR1910.242(b), and the EU General Product Safety Directive 2001/95/EC, and they also meet the noise limitation requirements 29CFR-1910.95 (a), of the EU Machinery directive 2006/42/EC. Some EXAIR products display the CE mark where there are applicable directives. All sound level measurements are taken 3 feet from product. On top of all this, you will get the best customer service anywhere. Myself and the other application engineers are here to assist you in choosing the best product for your application.

If you have any questions or need assistance with any of EXAIR‘s products or our certifications please do not hesitate to reach out.

Application Engineer

Brian Wages

EXAIR Corporation
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Compliance photo by xdfolio with Pixaby License

Understanding EXAIR Air Amplifiers and Air Pressure Amplifiers

Adjustable Air Amplifier

I take many calls regarding Air Amplifiers but sometimes I get calls that confuse EXAIR Air Amplifiers with air pressure amplifiers. EXAIR’s Air Amplifiers and air pressure amplifiers are fundamentally different and have different purposes.

First, EXAIR’s Super Air Amplifiers and Adjustable Air Amplifiers increase air volume, not pressure. Air pressure amplifiers increase air pressure from typical system pressure of 80-130PSIG up to 5000 PSIG. Air pressure amplifiers are an excellent solution for applications that require higher air or nitrogen pressure such as increasing force for clamps or presses and pressure testing processes. They are also known as air boosters.

Air Amplifiers use the Coanda Effect to generate high flow with low consumption.

EXAIR Air Amplifiers are a low cost way to move air, smoke, fumes and light materials. These Air Amplifiers use the Coanda effect to create a low pressure area which draws in surrounding air to efficiently deliver a high volume of air on to a target. Using a small amount of compressed air as their source, Air Amplifiers are among the most efficient products within EXAIR’s entire product line. EXAIR Air Amplifiers will create output flows up to 25 times their consumption rate and deliver it at a high velocity. The entrainment of outside air amplifies the total volume of air output which also increases force, cooling ability and circulation.

EXAIRs Air Amplifiers have no moving parts, assuring maintenance-free operation. Fine tuning flow, vacuum and velocity are easily controlled by regulating the pressure. For gross adjustment of air flow and vacuum an internal shim is used to increase or decrease the internal “air gap” that the compressed air flows through. Both vacuum and discharge ends of the Air Amplifier can be ducted, making them ideal for drawing fresh air from another location, or moving smoke and fumes away.

I hope this helps distinguish EXAIR Air Amplifiers versus air pressure amplifiers. If you have questions regarding EXAIR Intelligent Air Products please contact one of our Application Engineers as we are always ready to help.

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

Interesting Compressed Air Application:  Cooling a Smokestack with Air Amplifiers

In some cities when you look along the skyline, you see flue stacks bellowing out plumes of white smoke.  I never paid much attention to the structure except that they were tall and in some cases very wide.  A power company contacted EXAIR about their flue stacks.  They did a temperature reading, and they found a hotspot within the wall of the stack.  To cool the hotspot, they contacted EXAIR for a solution. 

Smokestacks are large chimneys that can be from 825 feet (250m) to 1,188 feet (360m) tall and are designed to release the smoke high in the air.  As a tall structure, it is important to keep the walls stable and sound.  For this customer, they were getting a hotspot reaching a temperature of 750oF (400oC).  This was too hot, and it could cause premature issues to the construction of the stack.  They wanted to reduce the temperature to 400oF (204oC) to keep the stack from warping and degrading.  We were able to find a solution using our stainless steel Adjustable Air Amplifiers

Adjustable Air Amplifier

The area of the hotspot in their smokestack was a section around 2 feet (0.6m).  The customer fabricated a stainless-steel manifold to mount three pieces of model 6033 3” 303SS Adjustable Air Amplifiers.  The model 6033 will only use 35.2 SCFM (997 SLPM) of compressed air at 80 PSIG (5.5 bar).  With the high amplification ratio, the model 6033 can move 2,323 SCFM (65,780 SLPM) of air along the surface.  The large volume of air created good cooling capacities to reduce the hotspot temperature.  In keeping the temperature of the stack under control, they could continue operations and lessen the concern for untimely shut-downs and costly maintenance. 

By using air to cool, you can do it safely and cleanly.  Unlike fans which create turbulent flows, voids, and high noise levels, the EXAIR Air Amplifiers generates a large volume of laminar air to cool and clean.  If you would like to speak about any cooling application, you can contact an Application Engineer; even something as large as a smokestack. 

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

Photo:  Smokestack by cwiznerPixabay Licence