Super and Adjustable Type Air Amplifiers

The EXAIR Air Amplifiers are a powerful, efficient and quiet air mover, whose power can be harnessed for blowoff, cooling and ventilation applications. Using a small amount of compressed air, air amplifiers pull in large amounts of surrounding air to produce a high volume, high velocity outlet flow.  Quiet and efficient, output flows with amplification ratios of up to 25 times are possible. There are two types, the Super Air Amplifier and the Adjustable Air Amplifier.

The Super Air Amplifier, with sizes ranging from 3/4″ to 8″, has a patented design (patent #5402938) that uses a special shim to maintain critical position of the components parts. It is through this critical gap setting that a precise amount of compressed air is passed at exact intervals controlled by the shim toward the center of the of the Super Air Amplifier.  The jets of air create a high velocity flow across the entire cross sectional area, which in turn pulls in large amounts surrounding air, resulting in the amplified outlet flow.  Because the outlet flow remains balanced and minimizes wind shear, sound levels are typically three times lower than other types of air movers. The shims are available in thicknesses of 0.003″ (supplied as standard), 0.006″ and 0.009″, and changing to a larger shim will increase the force and flow of the outlet air. The 8″ Super Air Amplifier is supplied with a 0.009″ shim, with a 0.015″ shim available.

2″ Super Air Amplifier and Patented Shim Design

For high temperature applications (up to 700°F/374°C) a special 1-1/4″ High Temperature Air Amplifier is available, with performance equal to the 1-1/4″ Super Air Amplifier. Its surfaces are protected from heat stress by a mil-spec coating process. The High Temperature Air Amplifier is highly effective at pushing large amounts of hot air to areas that typically remain cool.

The Adjustable Air Amplifier, with sizes ranging from 3/4″ to 4″, does not use a shim, and has an infinitely adjustable air gap, which regulates the air consumption and outlet flow from a light breeze to a powerful blast. A highly effective air mover, it can be tailored to meet the exact air flow and force of your specific application. They are available in aluminum and in stainless steel (Type 303) for food service, higher temperatures (400°F/204°C) and corrosive environments.

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2″ Adjustable Air Amplifier, in Aluminum or Stainless Steel

Force and flow of the Adjustable Air Amplifier is changed by loosening the knurled lock ring and turning the exhaust end to open or close the gap.  Once the desired force and flow is achieved, the knurled ring can be tightened to lock the device at the current setting. Typically, an air gap of 0.002″ to 0.004″ provides the required performance.

The table below summarizes the key features of the Super Air Amplifier and Adjustable Air Amplifier.  Please contact an Application Engineer if you need assistance in making a selection.

Air Amp Selection Chart

Note that EXAIR can manufacture special Air Amplifiers to your specification including special flanged mounting style or with a PTFE plug to avoid sticky material build up.

To discuss your application and how a Super or Adjustable Air Amplifier or any EXAIR Intelligent Compressed Air Product can improve your process, feel free to contact EXAIR, myself, or one of our other Application Engineers. We can help you determine the best solution!

Brian Bergmann
Application Engineer

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EXAIR Super Air Amplifiers Compared to Fans

Super Air Amplifier

EXAIR Super Air Amplifiers and fans are designed to move air.  Fans use motors and blades to push the air toward the target.  There are two types, centrifugal fans and axial fans.  Centrifugal fans are also called blowers or “squirrel” cages.  The air enters into the side of the fan and is redirected 90 degrees to the outlet.  The axial fans are box fans, ceiling fans, and industrial fans.  The motor and spindle are attached to blades.  The air enters from directly behind the fan, and the blades “slap” the air forward to the target. The EXAIR Super Air Amplifiers does not have any blades or motors to push the air.  They use a Coanda profile with a patented shim to create a low pressure to draw in the air.   (You can read more about it here: Intelligent Compressed Air: Utilization of the Coanda Effect.)  I will expand a bit more in this blog about how each one performs in moving ambient air.

The reason to move air can vary by application from cooling, drying, cleaning, and conveying.  The more air that can be moved, the better the performance for each of these functions.  With the Super Air Amplifiers and fans, these products can move the air, but what affects air flow?  Velocity, turbulence, and static or back pressure.  As we look at each one, we can start to see the effectiveness within each application.

Super Air Amplifier – flow region

Velocity is air flow per unit area.  This is the speed at which the air is traveling.  Some fan designs can affect the velocity, like the motor and spindle in the center of the axial fan.  Some of the area is removed from the middle of the flow region.  So, the velocity is very weak in the center.  (Reference diagram below).  With the centrifugal fan, the air velocity has to be redirected and pushed out the exhaust.  The velocity profile is very disoriented and will work against itself within the flow region.  If we look at the EXAIR Super Air Amplifier, the center is open as shown above.  There are no obstructions.  Since we are drawing in the ambient air, the velocity profile is laminar meaning that the flow is even across the entire flow region.  Laminar flow is optimum for a uniform force and effective blowing.

Axial Fan velocity profile

Turbulence is the “action” of the air flow.  If the turbulence is high, the air flow pattern is interrupted and chaotic.  It causes the velocity of the air to decrease quickly.  By the time the air reaches the target, it has low energy and force.  As a result of turbulence, noise levels can become very loud.  With a centrifugal fan or blower, the air is forced to move at a right angle and pushed out through an exhaust port.  This creates a very turbulent air flow.  The axial fan has less turbulence than its counterpart, but the blades still “slap” the air to push it forward.  This disruption in the flow pattern for both fans create turbulence and disarray.  The EXAIR Super Air Amplifier draws the air into the device to generate very little turbulence on the exhaust end.  The flow pattern is consistent, working together in the same direction.  This will allow for more air to reach the target.

Static pressure is important as it relates to the amount of resistance or blockage.  When blowing air through or around products, this resistance will determine the effectiveness and distance for efficient blowing.  To find the maximum resistance, this would be considered at the dead-end pressure.  When the exhaust is totally blocked, the maximum pressure is created.  In an application, the higher the resistance, the less air that can flow through and around to be utilized.  With fans, it is dependent on the blade types, motor size, and RPM.  Since the EXAIR Super Air Amplifiers do not have motors or blades, it is determined by the inlet air pressure.  So, the higher amount of static pressure, the more resistance that the blowing device can handle.

In comparison, I created a table below to show a model 120024 4” Super Air Amplifier against two different types of fans.  The first thing that you notice is the small package area of the model 120024 as compared to the fans that create similar air flows.  The centrifugal fan requires an addition electrical motor which increases the cost and generates a larger footprint.  The reason for the smaller flow area is the laminar air flow that the Super Air Amplifiers generate.  As stated above, the velocity pattern works together in the same direction.  So, a smaller profile can produce a lot more air movement.  In addition, this helps to create a larger static pressure.  Also referenced above, it will move the air much further to do more work.  With high turbulence, the air movement works against itself causing inefficiencies and louder noise levels.

Specification Table

In physics, it is much easier to pull than it is to push.  The same goes for moving air.  Fans are designed to “push” the air and the Super Air Amplifiers are designed to “pull” the air.  This method of pulling makes it simple to create a laminar flow in a small package which is more efficient, effective, and quiet.  Being powered by compressed air, there is no need for electric motors or blades to “push” the air ineffectively.  With the patented shims inside the Super Air Amplifiers, they maximize the amplification by “pulling” in large amounts of ambient air while using less compressed air.  If you want to move away from blower systems or axial fan systems to get better cooling, drying, cleaning, and conveying; you can contact an Application Engineer for more details.

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

Reversible Drum Vac Quickly Empties Sump In Close Quarters

I had the pleasure of talking with an operator in a power generating plant recently. A small sump, in a hard-to-access location, needed to be emptied periodically, or it would overflow and make a big mess. They didn’t have room for a “great big” (his words) 30 or 55 gallon drum, and it was difficult to use an electric shop vac because there wasn’t an outlet nearby (it’s a very humid location in the steam plant) so they had to rig an long extension cord through a doorway and down to the lower mezzanine.

They DO have compressed air available…in fact, there was an unused port on a manifold that supplied other pneumatic equipment, right next to the sump. He thought it sounded like an ideal application for the Mini Reversible Drum Vac.

And it was. They put a Model 6196-5 Mini Reversible Drum Vac System on the floor, next to the sump, and empty it (usually 1-2 gallons) on the night shift. They also got a 6569-20 20ft Vacuum Hose, which they use to pump the drum contents into an internal drain system.

Reversible Drum Vac systems are available from 5 to 110 gallon capacity

No more hassles with the electric shop vac and extension cord. No more overflow messes. The most they have to do now is change to the 20ft hose when they empty the drum.

If you’d like to find out how an EXAIR Intelligent Compressed Air Product can make your life easier, give me a call.

EXAIR Industrial Vacuums: Dry Vacuums

Our Industrial Housekeeping vacuums utilize compressed air energy to create a powerful and effective vacuum capable of with standing the harshest of environments. These vacuums have no moving parts to wear out or replace, run quietly and are built to be placed upon your own drum or may be purchased with a drum.

EXAIR has three dry/solid vacuum systems available they are the Chip Vac, Heavy Duty Dry Vac and the Heavy Duty HEPA Vac.

The EXAIR Chip Vac picks up wet or dry chips and delivers them directly into an ordinary open-top drum.  The Chip Vac is used to clean chips from fixtures, floors and work surfaces of machining centers, lathes, saws, mills and other industrial equipment.  The Chip Vac is the ideal choice for quick and efficient cleaning.  The Chip Vac can also be used to vacuum wood or plastic chips and can be used occasionally for dusty materials since it incorporates a filter bag to keep the surrounding air clean.

The 30, 55 & 110 Gallon Chip Vac’s consume 40 SCFM @ 80 PSI while the 5 Gallon size consumes 33 SCFM @ 80 PSI.  All 4 models are rated at a super quiet 77 dBA!

chipvac_family
5, 30, 55, and 110 Gallon Chip Vacs

The Heavy Duty Dry Vac like the Chip Vac can attach to ordinary open-top drums.  Designed to withstand tough industrial environments the proprietary hardened alloy pump deliver powerful performance with superior abrasion resistance.  They are used for a wide variety of applications that include abrasive materials such as steel shot, garnet, metal chips and sand!  Please know that while very powerful it is still suitable for general applications such as vacuuming floors, machines, work stations and industrial equipment.

The 30, 55 & 110 Gallon Heavy Duty Dry Vac’s consume 68 SCFM @ 80 PSI and have a sound level of 82 dBA.

6397
Available in 30, 55 & 110 Gallon Sizes

Finally the Heavy Duty HEPA Vac has the added benefit of the HEPA quality filter system.  Filtration per IEST-RP-CC-007 to 99.97% minimum filtration at the 0.3 micron level ensures performance meets the needed criteria.  Like the Chip Vac and the Heavy Duty Dry Vac it will attach to ordinary open top drums as well.

The 30, 55 & 110 Gallon Heavy Duty HEPA Vac’s consume 68 SCFM @ 80 PSI and have a sound level of 82 dBA.

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Available in 30, 55 & 110 Gallon Sizes

When you look at the EXAIR vacuum producing units, you will notice there is not an electrical cord.  That is because the EXAIR Industrial Housekeeping Products utilize compressed air for operation, therefore they do not have the same issues with wear, breakdown and failures as electrical type vacuums. Quite simply there are no moving parts in the vacuum units to wear out or break.  They are maintenance free, just make sure the air supply is clean & dry, and they will operate for a long time due to the fact that there are no motors and bearings to wear out and no impellers to clog.

If you would like to discuss Industrial Housekeeping or any EXAIR product,  I would enjoy hearing from you…give me a call.

Steve Harrison
Application Engineer
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Super Air Amplifier Increases Airflow In Vaccum Hood For Fume Extraction

A couple days ago I  took a call from an extrusion company who was looking to increase the airflow in their plating operation. They manufacture several different shapes and styles of aluminum extrusions by the way of 8 large extrusion presses. On one of the presses they make a specialty line of products that are sent to a finishing operation to be anodized.

Above the anodizing process tanks they use a vacuum hood to capture fumes and send them to a scrubber system so the air can be cleaned before being exhausted. They were starting to see an increase in the level of VOC (Volatile Organic Compound) gases in the area and, after some internal testing, determined the existing system wasn’t moving enough air through the system for the gases to be adequately delivered to the scrubber tank.

Example of a scrubber system

After further discussion, the customer ordered our Model # 120022 2″ Super Air Amplifier to test under our Unconditional 30 Day Guarantee.  Air Amplifiers are one of the most efficient products in the EXAIR catalog. Using a patented internal shim, they use a small amount of compressed air that passes through an internal chamber where it is exhausted through a thin gap at high velocity. This directed airflow creates a lower pressure at the intake side which draws in a large amount of free air. The 2 combining air flows result in a large volume of “amplified”, high velocity exhausting airflow, making them ideal for increased air movement.

Air Amplifiers entrain enormous amounts of “free” air, at ratios of up to 25:1!

If you have an application where you need to increase airflow or if you’re looking to vent or exhaust noxious fumes, an Air Amplifier is the ideal choice. For help selecting the best Model or to discuss a particular process, please contact an application engineer for assistance.

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN

 

Pueblo Chemical Agent-Destruction Pilot Plant Agent Processing Building courtesy of PEO ACWA via creative common license.

 

EXAIR’s Vac-U-Gun: Blowoff or Vacuum with Just One Gun!

Now through the end of May, EXAIR is running a promotion on the Industrial Housekeeping Products that includes a FREE Vac-U-Gun with any purchase of an Industrial Housekeeping Vacuum System. EXAIR’s Vac-U-Gun is a low-cost solution to a wide variety of industrial housekeeping problems. The Vac-U-Gun has a durable die cast construction and no moving parts to replace or wear out.

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Vac-U_Gun cleaning up shavings after a sawing operation

In addition to being easy to use, the Vac-U-Gun is also more efficient than ordinary blow guns. By injecting a small amount of compressed air through directed nozzles, a vacuum is then produced on one end and a high output flow on the other. The amplified outlet flow through the Vac-U-Gun is 12 times the compressed air consumption of the gun.

The Vac-U-Gun is capable of both vacuuming material, as well as being operated as a blow gun. In vacuum mode, the work surfaces can be easily cleaned by vacuuming the debris away rather than blowing it off of the surface. Rather than simply moving the material around the shop floor, it can be contained and transferred to a waste receptacle using the 10’ vacuum hose, or straight into the filter bag.

vac u gun orientation

Switching from vacuum mode to blow mode can be achieved in just a matter of seconds. To change the Vac-U-Gun from vacuum to blow mode, simply remove the threaded cap and change the orientation of the generator inside. Since the Vac-U-Gun has a large 1-1/4” diameter air outlet, it covers much more surface area in less time compared to traditional air guns. This can help to reduce the time needed for a variety of different blowing, cooling, or drying applications. Due to the nature in which the Vac-U-Gun entrains ambient air, it allows for more force and flow through the gun at a minimal compressed air consumption.

vac u gun kits

The Vac-U-Gun system is available by itself, or in one of three different kits. It can be used with or without the 10’ (3m) vacuum hose or the filter bag. Various vacuum accessories are included in the kits to accommodate a variety of different materials and applications. If you’re looking for a versatile gun that can help boost productivity in a number of applications within your facility, look no further than the Vac-U-Gun.

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

The Case for the Chip Vac

EXAIR Chip Vacs come in a range of sizes, and options, to meet the needs of most any clean up job.

The season for spring cleaning – spring, that is – is upon us (here in the Northern Hemisphere anyway) so it’s time to start looking for ways to make the task as easy and hassle-free as possible. That’s my take, anyway…and if you feel the same trepidation (or maybe even dread) as me, then this blog is for you. If you are one of those people who LIKES cleaning (you know who you are,) there’s something here for you too.  Without further ado, let’s talk about the EXAIR Chip Vac Systems.

The first thing you should know is that, like all EXAIR Intelligent Compressed Air Products, Chip Vac Systems are compressed air operated.  Why is this important?

*Safety – there’s no electric power cord or cable to trip over, damage, or get wet…all of which can be an electrocution hazard.

*Consistency – unlike a typical shop vac, which has a motor driven impeller/propeller to generate the vacuum flow, the Chip Vac creates powerful direct flow action from the compressed air supply.  With no moving parts in the way, there’s nothing to trap debris or clog the line.  If it can fit through the hose, the Chip Vac can suck it into the drum.  Every time, all the time.

*Reliability – electric motors can overheat and burn out if you run them continuously for long periods of time – or if you start and stop them frequently.  Not so with the Chip Vac…it’s pulling rated vacuum and flow as soon as you cut in air to it.  And if you supply it with clean, dry air, the Chip Vac will operate darn near indefinitely, maintenance free.

At EXAIR, our motto of being “easy to do business with” applies to not only all aspects of Customer Service and Technical Support; it’s even integral to our systems design.  What does this mean for the Chip Vac?

*Versatility – we make Chip Vac Systems for 30, 55, or 110 gallon drums.  If you don’t already have an open top drum to install one on, we can supply the drum too.

*PortabilityDeluxe Chip Vac Systems come with a dolly for your drum, so you can roll it wherever you need it.  The 30 Gallon Chip Vac Systems are compact enough to fit through just about any passageway that you can walk through.  But in tighter constraints…

*Portability, part 2Mini Chip Vac Systems come complete with a 5 gallon drum that can be easily carried or lifted to just about anywhere you need it to go.  The Deluxe System even comes with a dolly, for total portability.

*Resourcefulness – because they fit standard drums, they’re easy to move from one drum to another.  This is of particular value to machine tool operators who work with different materials: they can use the Chip Vac on one drum to vacuum up aluminum chips from one job, and then move it to another to clean up stainless steel chips from another job.  This makes recycling quick, easy, and profitable.

If you’d like to find out more about how EXAIR Chip Vac Systems – or any of our Industrial Housekeeping Products, can improve the efficiency and safety of your cleaning tasks (Spring or otherwise,) give me a call.

Russ Bowman
Application Engineer
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