Vac-u-Gun: Low Cost Vacuum, Blowoff and Transfer

What is the Vac-u-Gun?  It is a low cost solution to many types of cleaning operations within an industrial setting.  The Vac-u-Gun is a vacuum gun, a blow gun, and a transfer tool, all-in-one! It is lightweight, easy to use, has durable die cast construction, and best of all, no moving parts to wear out. Simply hook up to a compressed air hose, and get to work.

Vac u Gun Hose

The Vac-u-Gun contains a nozzle insert that dictates the direction of air flow and operation. By simply unscrewing the the cap, reversing the orientation of the nozzle insert, and re-installing the cap, the gun is changed from a vacuum device to a blowoff device, and vice-versa.

vac u gun orientation
Reverse the direction of the nozzle insert to change from vacuum to blowoff

The Vac-u-Gun can be used in three modes- Vacuum, Transfer and Blowoff-

Vacuum Mode – Vacuum shavings, absorbents, sawdust, or spills into a reusable bag, or into a receptacle via the vacuum hose. Why blow it off and the have to sweep it up later?

Transfer Mode – Transfer small parts, pellets, or trim over long distances, using the smooth bore vacuum hose.

Blowoff Mode – Blow chips, water, coolant, or scrap away from the work area. The large 1-1/4″ diameter outlet directs the air over a larger area in less time. The Vac-u-Gun uses less compressed air than an ordinary blow gun.

Vac-U-Gun Specifications

There are many advantages to a Vac-u-Gun, and some are:

Low cost, no moving parts/maintenance free, durable die cast construction, easy to switch form vacuum to blow mode, safe – no electricity, meets OSHA pressure requirements, lightweight and portable, versatile, and quiet.

Versatile!  In just seconds, the Vac-u-Gun can transform from a powerful, handheld vacuum tool into an efficient blow gun or transfer tool for lightweight materials. Each Vac-u-Gun System comes with the attachments needed to suit numerous industrial applications.

Three (3) Vac-u-Gun System options are available and shown below-

Vac-u-Gun System Options

All of the Systems include the Vac-u-Gun, brush, crevice tool, skimmer tool and (2) extension wands.

The Model 6192 Collection System also includes the reusable bag with clamp for debris collection.

The Model 6292 Transfer System also includes the vacuum hose, for transferring the debris to a collection point.

The Model 6392 All Purpose System also includes both the reusable bag and clamp and the transfer hose, providing the most versatility of all.

To view a video that shows the Model 6392 All Purpose System, and demonstrates how it works, please view the video below-

 

If you have questions about the Vac-u-Gun or any of the 16 different EXAIR Intelligent Compressed Air® Product lines, feel free to contact EXAIR and myself or any of our Application Engineers can help you determine the best solution.

Brian Bergmann
Application Engineer

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E-Vacs: Shrinking Foam Packages

In-Line E-Vac Family

A foam manufacturer was looking for a way to reduce the size of their shipping packages.  The type of product was a polyurethane open-cell foam that they would place inside plastic bags to ship.  With shipping charges, the dimensional weight, not actual weight, is used, and it can be very costly.  Since it was open-cell foam, they wanted to evacuate the air from the plastic bags.  This would decrease the package volume and reduce shipping costs dramatically.

The company gave me some details on the product and their process.  The polyurethane foam had a density of 1.1 lb./ft3 (18 Kg/M3), and they were bagging pieces of the foam in plastic bags with the dimensions of 30” long by 10” diameter (0.75m long by 0.25m diameter).  They attempted to use a shop vac to reduce the volume; but, it was too loud and too cumbersome for their process.  They also noticed that the vacuum level was not enough to maximize the shrinkage.  They searched the internet for a better way, and they found the E-Vac™ Vacuum Generators.  They contacted EXAIR to get more information.

The EXAIR E-Vacs use compressed air to create a vacuum by a venturi method.  It can reach vacuum levels up to 27” Hg (91 kPa).  They are very compact and lightweight, and they do not have any moving parts to wear.  So, they are very durable and long lasting in systems with cycling or continuous operations.  In comparison, a typical electric vacuum has a vacuum pressure near 6” Hg (20 kPa).  With the EXAIR E-Vac having a vacuum level 27” Hg (91 kPa), we can draw out much more air to reduce the volume.

At EXAIR, we pride ourselves on customer service.  With this application, I was able to setup a representative sample for testing.  I shot a short video to show the power of our smallest E-Vac.  The video shows a representative sample with a smaller bag.  You can see the volume change with polyurethane foam.

In addition to the video, I was able to calculate the time to evacuate the package to 27” Hg (91 kPa).  EXAIR manufactures seven different sizes of High Vacuum E-Vac Generators with different flow ranges.  The above customer requested an evacuation time in about 30 second.  With Equation 1, I can determine the correct E-Vac size to meet the requirement.

Equation 1:  q = V * ln(p0 / p1)  / t
q = Vacuum flow rate (SCFM)

V = enclosed volume (ft^3)

p0 = atmospheric pressure (“Hg)

p1 = end vacuum pressure (“Hg)

t = evacuation time (min)

Details:
Volume of cylindrical plastic bag: V = 1.36 ft3

Atmospheric air pressure: p0 = 29.92” Hg

Final absolute air pressure: p1 = (29.92” Hg – 27” Hg) = 2.92” Hg

Time to evacuation: t = 0.5 min.

Thus,

q = V * ln(p0 / p1) / t

q = 1.36 ft3 * ln(29.92” Hg / 2.92” Hg) / 0.5 min

q = 6.3 ft3/min or 6.3 SCFM

From the specification on our E-Vac, I was able to recommend the model 810013M.  At 80 PSIG, this model has a vacuum flow rate of 6.85 SCFM; plenty enough to hit the target time.  After installing the E-Vac in their packaging process, they were able to reduce the size by almost 70%.  This was very helpful in reducing the dimensional weight for each shipment; saving the company and their customers much money.

If you would like to send samples in for vacuum test or need calculations for performance improvements, EXAIR Application Engineers will be happy to assist you.  EXAIR always likes to go that extra mile for our customers.

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

Sanitary Flange Line Vacs for Bulk Conveying

Piping systems have been a hallmark of human civilization for almost as long as people have been living in community with each other. Evidence of complex earthen pipe systems, with flanged fittings & asphalt sealants, date to 2700 BC. These were used for crop irrigation, potable water distribution, and wastewater removal in ancient civilizations from the Mediterranean to the Far East.

Over the centuries, new ways to use pipe led to new ways to make pipe.  Scientists and engineers figured out ways to make pipe stronger, lighter, cheaper, and in a variety of materials.  One of the more recent milestones is the development of sanitary piping and fittings.  The stringent cleanliness controls in certain industries (food and pharmaceutical, I’m looking at you) require highly corrosion resistant materials of construction.  The inside & outside surfaces of the pipe have to be finely finished so that they can be thoroughly and positively cleaned, with no crevices, “nooks & crannies,” etc., for material to gather or cling.  And since regular cleaning & sterilization is performed, the fittings must be able to be made & unmade in a manner that still provides for positive sealing when the system is restored to operation.

EXAIR Line Vac Air Operated Conveyors have always been well suited for applications like this.  With their open, unobstructed throats and smooth bores, they’re intuitively easy to clean, by design.  And we’ve made them, for years, in Type 316 Stainless Steel – the preferred material of construction for many food and pharmaceutical applications.  Many users in these industries were able to install them in sanitary piping systems by welding the flanges on our Stainless Steel Line Vacs, or by installing adapters on our Threaded Stainless Steel Line Vacs.

In the spring of 2017, EXAIR released the Sanitary Flange Line Vac with those same users in mind – eliminating the need to weld or thread flanges onto existing products.  They feature the same conveyance power as our Stainless Steel Line Vacs, and can even be modified to meet Heavy Duty Line Vac performance, if needed.  There are four sizes: 1-1/2″, 2″, 2-1/2″, and 3″…which covers the most popular size range of sanitary pipe systems.

While the sanitary piping systems are certainly most often found in those cleanliness-critical food & pharma type applications, other users incorporate them because of the smooth, continuous bore of the pipe and fittings, as opposed to a threaded pipe system, where the OD of the pipe threads into the ID of the fittings, causing a “step” in the throughput.  Because sanitary fittings mate via face-to-face flange seals, this eliminates that “step” which can make for a catch-point for certain items.  It’s for this very reason that a popular ammunition manufacturer uses sanitary pipe systems to convey shell casings…because they tumble with such turbulence in the air flow, they are especially prone to hanging up on any kind of catch-point.  So, they use sanitary piping & fittings, long radius elbows, and EXAIR Model 161150-316 1-1/2″ Sanitary Flange Line Vacs.

Air conveying of certain items, like these ammo shell casings, can be prone to clogging or jamming in systems where pipe, hose, and/or fittings are inserted into each other, creating catch-points.

EXAIR has a wide selection of engineered compressed air products that are “textbook” solutions for certain applications, but also make perfect sense for use in places you might not have thought of.  If you have a bulk material conveyance operation you’d like to discuss, give me a call.

Russ Bowman
Application Engineer
EXAIR Corporation
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Shells photo courtesy of hydropeek  Creative Commons License

The Case For The Adjustable E-Vac Vacuum Generator

Vacuum generation is vital to many industrial processes:

*Pick-and-place. Vacuum cup systems are used to move metal sheets onto laser & plasma cutting beds, precisely place parts for assembly using end-of-arm robotic tooling, or moving awkward objects, like plates of glass, by hand.

The same Adjustable E-Vac Vacuum Generator can be used for a range of products, from the cinder bloc (left) to small pavers (right.)

*Bag/package opening.  When plastic bags come off a roll and are fed through an automated filler, vacuum cups can make quick work of opening them up, immediately before the filling operation.

*Vacuum filling.  A closed container can be easily filled, without a pump, by simply drawing a vacuum on it.  Same mechanism (and simplicity) as when you drink a beverage through a straw.

These are just a few of the typical uses for an EXAIR E-Vac Vacuum Generator…I’ve written before about how this is our most versatile product line (by number of different applications) but these in particular are the ones I want to use to make the case for the Adjustable E-Vacs.

EXAIR Adjustable E-Vac Vacuum Generators are available in four distinct models, depending on the needs of your application.  Performance is variable not only by regulating the air supply pressure (like any compressed air product) but also by threading the plug into the body, which changes the size of the annular gap that feeds the Venturi, changing the vacuum and flow levels.  This can be used to overcome vacuum loss due to material porosity or vacuum cup leakage in a pick-and place application, to accommodate different bag sizes or types in an opening application, or to change the rate at which a liquid is moved in a vacuum filling operation.

With four to choose from, EXAIR has an Adjustable E-Vac that will fit your vacuum generating needs.

Because of their larger throat diameter, they’re also better suited for situations where particulates or moisture may be entrained…they won’t clog or ‘stall out’ as is common with other Venturi-type products.  This is especially useful in vacuum chucking/clamping, or when contaminants from dirty environments can make their way into the system.

EXAIR E-Vacs provide instantaneous vacuum response, and are engineered for high efficiency to minimize air consumption.

Like EXAIR In-Line Vacuum Generators, they instantly develop rated vacuum as soon as compressed air is supplied, so they’re well suited for fast moving operations.  With no moving parts, they’re durable, effective, and if you feed them with clean, dry air, they’ll operate a good long time, virtually maintenance free.

If you have a vacuum generating application you’d like to discuss, please give me a call.

Russ Bowman
Application Engineer
EXAIR Corporation
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Person of Interest: Giovanni Battista Venturi

Giovanni Battista Venturi was an Italian physicist that was born in Bibbiano, Italy on March 15, 1746.  He died at the age of 76 on April 24, 1822.  During his early life, Giovanni was ordained as a priest at the age of 23; and, he became a professor of geometry and philosophy at the University of Modena at the age of 28.    He moved to Paris France where he worked with other scholars to expand his knowledge of physics and chemistry.  In 1797, he wrote a dissertation on the now famous “Venturi effect”.  However, an actual device was never created or applied until 1888 where Clemens Herschel was awarded the patent for the first Venturi tube.

Venturi Tube

The Venturi effect is a decrease in fluid pressure when fluid flows through a constricted area of a pipe.  In other words, as the diameter becomes smaller, the fluid velocity becomes faster.  This increase in velocity will create a lower pressure just past the constricted area.  when designed correctly, you can create a strong vacuum or a large negative pressure.

E-Vac design

The EXAIR E-Vac® Vacuum Generators use this phenomenon founded by Giovanni Venturi by using compressed air as the fluid.  This type of Venturi tube restricts the internal area to generate a fast velocity through the body creating a vacuum pressure for suction.  EXAIR offers three types of Venturi tubes; low vacuum, high vacuum and adjustable.  The high vacuum generators can create a vacuum level as high as 27” Hg (71 KPa).  The Adjustable E-Vacs can alter the internal air velocities by turning the body and getting different vacuum pressures.  Without any moving parts or electric motors to wear, the EXAIR E-Vacs are a simple design that is very durable, effective and long-lasting.  A great product for applications like pick and place, clamping, lifting and vacuum forming,

The Venturi effect was discovered in 1797, brought into existence in 1888, and is still used in vacuum applications to this very day.  If you have an application where a Venturi tube could help you, please contact an Application Engineer.  We will be happy to assist you.

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

 

Photo: Venturi Tube with labels by ComputerGeezer an Geof.  GNU Free Documentation License

Do You Need 30 Days for Testing?

Not long ago while checking out of a motel my laptop bag that was attached to the handle on my suitcase fell forward and the impact shattered the screen on the laptop.  Upon turning the computer on I realized that a new screen was in order.

I waited until I arrived at home and found what I thought to be the correct monitor and quickly ordered it.  It arrived two days later and I painstakingly took the laptop apart and exposed the mounting frame.  The removal of the broken screen and the installation of the new was not too difficult but the cable connector was less than robust and was very tight.  Carefully I worked it back and forth and it came free.

Installation and reassembly went quickly and then I powered up the machine.  I was only greeted with a series of very loud and annoying beeps.  At that point I shut it down and called the company I purchased the screen from and described the issue.  They determined that the resolution of the screen was incorrect for my laptop and that I needed a different model.  They said I could return the incorrect one and upon inspection receive a credit less the return shipping.  At that point I ordered the correct screen and packaged up the wrong one and dropped it off at the parcel delivery service.

The new model arrived and it installed easily and worked perfectly.  I waited patiently and never did see a refund so I called the company and they said that it was an oversight on their end and that it would be corrected within 48 hours.  Sure enough they issued the credit and money was credited back to my account with one exception, the 40% restocking fee!

I can tell you that EXAIR is not that way!  If you order the wrong item or are not satisfied for any reason and the item was purchased within the last 30 days we will facilitate the return and ZERO restocking fee. There are a multitude of reasons our customers would want to take advantage of our 30 day guarantee and we make it a simple transaction if you need to take advantage of it too. Testing is one reason a customer would use this 30 days, other customers may have ordered incorrectly or released product inadvertently, they may have wanted a small sample for a meeting or demonstration at a customers location.

30 day money back guarantee
EXAIR Guarantee

If you want to discuss any EXAIR product, I would enjoy hearing from you…give me a call.

Steve Harrison
Application Engineer
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EXAIR Industrial Housekeeping Vacuums – A Look at the Advantages Over Electric Vacuums

EXAIR‘s line of Industrial Housekeeping Products consist of liquid and dry vacuums that utilize compressed air to operate. They do not have electric motors which most ‘all purpose’ vacuums rely on.  In industrial settings with harsh conditions and rugged use, the Industrial Housekeeping Products are ideally suited for the everyday wear and tear.                               6091   6095.jpg

The heart of the EXAIR liquid type vacuums, like the Reversible Drum Vac, the High Lift Reversible Drum Vac, and the same range in the Chip Trappers is shown here. Installing onto an any closed head, 30, 55, or 110 gallon drum creates a high powered vacuum.  It can fill a 55 gallon drum in less than 2 minutes.  Then, with the turn of a knob, the the same pump quickly empties the drum. Useful for refilling coolant sumps, vacuuming floor spills, or transferring contaminated liquids to filtration tanks in minutes.  Flow rate can be controlled with the knob.  The Chip Trapper has an internal filtration system to separate the chips from the coolant, allowing for disposal of the solids, and for pumping of the clean coolant back into the sump.

rdvfam
5, 30, 55, and 110 Gallon Reversible Drum Vacs – A size to Meet Most Any Requirement

Also available are the dry/solid type vacuum systems, the Chip Vac, Heavy Duty Dry Vac and the Heavy Duty HEPA Vac which use the vacuum units shown below.6093                                                                    6097

The EXAIR Chip Vac and Heavy Duty Dry Vac is a powerful industrial vacuum for use on wet or dry chips. Both are for use with 30, 55, or 110 gallon drums, and the Chip Vac can also be used on a 5 gallon drum. 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.

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

When you look at the vacuum producing units, you’ll notice there is not an electrical cord.  Because the EXAIR Industrial Housekeeping Products utilize compressed air for operation, they do not have the same issues with wear, breakdown and failures as electrical type vacuums. There are no moving parts in the vacuum units to wear out or break.  They are maintenance free, just supply clean, dry air, and they will operate for a long time. For the the liquid type systems, there is a built in pressure/vacuum relief device and auto safety shut-off to prevent overfilling.

There are no motors and bearings to wear out and no impellers to clog.  The Chip Vac is 50% quieter than a comparable electric vacuum.  Safety is a top priority, and the use of the unit on wet floor and spills is not an issue.

If you would like to talk about Industrial Housekeeping products 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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