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
Visit us on the Web
Follow me on Twitter
Like us on Facebook

Building Flexibility with Stay Set Hoses and Magnet Bases

You can build in flexibility when purchasing Super Air Nozzles, Air Knives, Safety Air Guns and other products from EXAIR. Consider adding our Stay Set Hoses and Magnet Bases to create flexibility and ease of set-up to your process. These accessories will improve your project and reduce your set-up time.

EXAIR has a variety of lengths in our Stay Set Hoses ranging from 6″ up to 36″ in 1/4 MNPT x 1/8 FNPT or 1/4 MNPT x 1/4 MNPT fittings. The Stay Set hoses are used mainly where frequent repositioning is required. You can bend and the hose to your desired position and since the hose has “memory” it will not creep or bend. It will keep this position until physically moved to the next position. These hoses can withstand temperatures up to 158 F (70C).

EXAIR Magnet Bases can be used when frequent movement of air product is required. These powerful magnets permit horizontal or vertical mounting. A valve is used to vary force and flow. The choice of single outlet, dual outlet and Swivel are available.

The combination of our Stay Set Hoses and Magnet Bases will accommodate Air Nozzles and Jets along with our smaller Air Knives, Air Wipes, Super Air Amplifiers and can also be assembled to our Safety Air Guns. There are many uses for our Stay Set Hoses and Magnet bases. While purchasing our Intelligent Compressed Air products consider all of our accessories to help your projects. If you have an application and have questions please contact EXAIR and one of our Application Engineers to answer your questions.

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

NEW from EXAIR! The VariBlast Precision Safety Air Gun

EXAIR’s New VariBlast Precision Safety Air Gun provides a strong, focused blast of air ideal for use in a wide variety of blowoff applications and processes. This CE compliant, lightweight gun utilizes an engineered variable flow trigger that is capable of producing variable force upon the target by simply pulling the trigger. The comfortable, full finger trigger and convenient hanger loop are built-in to the ¼ NPT Safety Air Gun.

Utilizing our range of small Super Air Nozzles (available in both type 316 SS and PEEK plastic for non-marring applications), this gun has the ability to fit into tight spaces while still delivering a strong blowing force. The VariBlast Precision Safety Air Gun is available with an optional 12” or 20” extension (3” extension installed on base model guns) that can also be outfitted with an impact resistant polycarbonate Chip Shield. The air gun body itself is constructed of a high impact polyacetal material for durable use over many years.

All available models of the VariBlast Precision Safety Air Gun come outfitted with an engineered nozzle that cannot be dead-ended, assuring safe usage for your operators and meeting the required standards put forth by OSHA under 29 CFR 1910.242(b). With sound levels as low as 58 dBA with the Model 1808SS, these guns are also well below the allowable limits of noise exposure discussed by OSHA in 29 CFR 1910.95(a).   

Inexpensive air guns are commonly seen in a variety of catalogs and industrial supply companies. Most contain triggers or other components are constantly need replaced. Additionally, their performance is similar to that of an open pipe or tube and can be extremely wasteful, not to mention a potential OSHA violation.

All of EXAIR’s Safety Air Guns will help you operate efficiently & safely. If you would like to discuss your blowoff process with an EXAIR Application Engineer, give us a call. With products available to ship same day from stock, we can get a solution to you as quickly as tomorrow!

Tyler Daniel

Application Engineer

E-mail: TylerDaniel@EXAIR.com

Twitter: @EXAIR_TD

Stay Set Hoses and Magnetic bases: adding flexibility to EXAIR products.

Mag Bases come with one or two outlets. Stay Set Hoses come in lengths from 6″ to 36″.

EXAIR manufactures a variety of intelligent compressed air products that can cool, clean, coat, convey, and conserve.  They’re designed specifically with enhanced efficiencies, OSHA safety, and high quality in mind.  What could make our products even better?  Making them movable, with the ability to aim them exactly where you need them!  EXAIR offers Magnetic Bases and Stay Set Hoses to achieve this.  In this blog, I will cover the features and benefits of both products.

Stay Set Hoses:

The Stay Set Hose gives you that possibility of manually adjusting and re-adjusting smaller EXAIR products like Super Air Nozzles and Air Jets.  The hose has a “memory” function, and it will not creep or droop until you physically move it.  They work very well in directing the air flows at specific target areas.  The Stay Set Hoses come in lengths from 6” (15cm) to 36” (91cm), and they have threaded connections with either ¼” NPT male on both ends or with a 1/8” NPT female X ¼” NPT male thread.  The hoses are made from reinforced synthetic rubber and have a pressure rating of 250 PSIG (17 bar).  They can add versatility to our Safety Air Guns and Blow-off Stations.  If you need positioning for precise blowing or adjustments for different targets, the Stay Set Hoses would be a nice addition to include with your EXAIR products. 

Magnetic Bases:

If you need a solid mount to steel surfaces or to move your blow-off system to different locations, the Magnetic Base will allow you to do these functions.  It has a 100 lb. (45.5Kg) pulling force to keep the blowing device attached firmly until you want to move it.  They can be mounted in a vertical or horizontal position.  EXAIR offers a single outlet Magnetic Base or a dual outlet Magnetic Base (for multiple blowing products). The bases come with a ¼ turn shut-off valve to easily turn on and off the compressed air to the EXAIR products. 

If you want to combine the Stay Set Hoses and Magnetic Bases with your EXAIR Air Nozzles and Air Jets, we can create this with the EXAIR Blowoff System.  We can combine multiple parts into a single model number.  At EXAIR, we pride ourselves with great customer service and an “easy to do business” philosophy.  You can contact a friendly Application Engineer to build an efficient, safe, and movable system just for you.

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