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.
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.
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.
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.
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.
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.
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.
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.
There are some very good reasons to consider an EXAIR compressed air operated Industrial Housekeeping Product for liquid applications:
*Durability. No moving parts means nothing to wear or get damaged.
*Safety. No electricity means no dragging an energized cord through a wet area.
*Convenience. All you need is a supply of compressed air.
*Reliability. If you supply it with clean, dry air, it’ll run darn near indefinitely, maintenance free.
Depending on the needs of the application, we have different models to choose from:
Reversible Drum Vacs
If you’ve got a closed top steel drum that’s in good condition, look no further than the Reversible Drum Vac System. It comes with everything you need to turn that drum into a powerful, 2-way liquid pumping system. This is great if you just need to park the drum in one spot and suction out a sump or tank on a regular basis, using its 10 foot Vacuum Hose & Suction Wand. They’re in stock for your existing 30, 55, and 110 gallon drums. A 5 Gallon Mini Reversible Drum Vac System is also available; it includes the drum as well.
If you’d like a little mobility, and a way to clean up floor spills, then the Deluxe Reversible Drum Vac System might be what you’re looking for. It adds a Drum Dolly and our Spill Recovery Kit…it consists of a floor-length wand and a dual squeegee tool. It also comes with a set of plastic tools (crevice tool, small skimmer, and two 20″ extensions) and a Tool Holder with clips for the tools, and magnets to attach to the drum. We keep them in stock for your existing 30 and 55 gallon drums. It also comes in the 5 Gallon Deluxe Mini Reversible Drum Vac System(drum included.)
For a complete system, the Premium Reversible Drum Vac Systems have everything you need for most any liquid drum transfer job: they add a drum, lid & latch ring, as well as a compressed air supply hose & shutoff valve, and an upgrade to Heavy Duty Aluminum Tools. They’re available with 30, 55, or 110 gallon drums; in stock.
Any of the 30, 55, or 110 Gallon systems are also available with our High Lift Reversible Drum Vac. These provide for increased performance with more viscous liquids, and/or when the liquid needs to pumped from a depth of up to 15 feet. They are outfitted identically to the standard Reversible Drum Vac Systems, except they come with a 20 foot Vacuum Hose.
As versatile as the Reversible Drum Vacs are, we also incorporate them into another 2-way pumping system, designed to help you get maximum life and performance from machine tool coolant and cutting oils: The award-winning Chip Trapper Systems.
Powered by the Reversible Drum Vac, the Chip Trapper System draws the incoming liquid into the drum through a Filter Bag, which retains (or “traps”) any particulate as the drum fills with liquid. Then, the freshly filtered liquid can be immediately pumped back out, while the particulate remains in the bag. Once the bag is full, simply remove the drum lid, unhook the bag, empty it out, and return it to service. The Chip Trapper System comes with two Filter Bags, in fact, so you can clean one while you use the other. They are available, from stock, in 30, 55, and 110 gallon sizes. They are all three available in High Lift configuration as well, with a 20 foot Vacuum Hose.
EXAIR’s In-Line and Adjustable E-Vacs are powerful compressed air powered vacuum generators. They’re a low-cost way to create a vacuum for a variety of different applications: pick and place, clamping, chucking, lifting, surface mounting, and vacuum forming are just some of the possibilities. Both the In-Line and Adjustable E-Vacs are available in a variety of different sizes and flows and can accommodate a wide range of applications.
With no moving parts to wear out, EXAIR’s E-Vacs are virtually maintenance free when supplied with clean, dry compressed air. To maintain proper operation of your E-Vac, installation of an Automatic Drain Filter to remove any particulate and moisture from the air supply is necessary. In addition, oil removal filters are also available if your compressed air supply contains any oil as is common in many compressed air systems.
For pick and place or lifting applications, vacuum cups will be necessary. With a wide variety of different vacuum cups available: small round, large round, oval, and bellows, we can accommodate nearly any size or shape material. For heavier materials, round cups with cleats provide rigidity and ensure that the load remains stable. For applications on textured or uneven surfaces, bellows style cups have convolutions that allow for the cup to quickly decompress when it touches the surface of an uneven part or material.
The vacuum port of the E-Vac has an NPT thread, vacuum cups can be installed directly in this inlet. For applications where the vacuum cup(s) are remotely located, we offer polyurethane vacuum tubing as well as a variety of different fittings to connect them. Both 1/4” and 3/8” O.D. sizes are available in 10’ lengths up to 50’. Simply indicate the model number of the tubing and add the length with a “-“ at the suffix. For example, a 900795-30 would be 30′ of 1/4″ O.D. tubing. In addition to fittings and tubing, vacuum check valves are also available. These can be beneficial if there is potential for fluctuations in the compressed air pressure or supply. In the event that there is a significant drop in pressure or loss of compressed air supply, the check valve will ensure that the load remains held.
With all of the different options making a selection can seem like a daunting task. A highly trained EXAIR Application Engineer is ready and available to help you!! With just a few quick details, we can help advise you about the proper size E-Vac generator for your application as well as recommend the most suitable cup and accessories. Give us a call, shoot us an e-mail, or reach out to us online via chat and we’ll make sure you have a complete vacuum solution ASAP with all parts ready to ship from stock!
Daniel Bernoulli was a Swiss mathematician and physicist born in 1700. He is most known for the Bernoulli principle, published in his book Hydrodynamica in 1739. The Bernoulli’s principle states that an increase in speed of a fluid will result in a decrease in pressure. As a fluid moves from a wider pipe to a narrow one, the fluid begins to move faster. The given volume of the fluid moving from one point to another over a set amount of time will not change. In order for the same amount of fluid to pass through a smaller orifice, it must speed up. This is displayed quite well in the flow of a river. At wide, open spaces the river flows slowly. In areas that become narrow, for example by a canyon wall, the speed of the river’s flow increases dramatically.
The Bernoulli principle also provides an explanation for the lift that is created on an airplane wing. When air encounters an obstacle (in this case an airplane wing), its path will narrow as it flows around the object. As this stream of air speeds up, some of the energy from the random motion of the air molecules must be converted into energy of the stream’s forward flow. Pressure is created by the random motion of these air molecules. Transferring this energy into the stream flow then results in a drop in the air pressure. An airplane wing is shaped so that the air must move faster over it than under it. This causes the slower moving air underneath to exert more pressure on the wing than the air moving across the top. This is referred to as lift and is what allows an airplane to fly.
Temperatures are beginning to creep back up here in Cincinnati and just last week pitchers and catchers for the Cincinnati Reds reported for Spring Training. They’ll also be watching Bernoulli’s principle in action. The oft-dreaded (for batters, anyway) 12-6 curveball occurs due to the way the pitcher forces the ball to spin. Due to way he grips the ball across the laces and imparts this spinning motion, more air pressure forms on the top of the ball. This causes the bottom of the ball to accelerate downwards, resulting in the phenomenon that drives many baseball players crazy as they swing and miss due to a miscalculation of the ball’s position.
Some of EXAIR’s products also utilize the Bernoulli Principle. As the high-velocity air exits the nozzle of a Super Air Knife, a low pressure area is created that draws in surrounding ambient air at a rate of 40:1. The same also occurs with the Super Air Amplifiers, Adjustable Air Amplifiers, and Air Nozzles. If you’d like to discuss the application of any of our Intelligent Compressed Air Products, give an Application Engineer a call today.
Even if you’re just a casual, infrequent reader of our blogs, you likely know that EXAIR Corporation is proud of our abilities to customize solutions for “out of the box” compressed air product applications. Oftentimes, this is offered as a custom engineered product, developed from a user’s specifications when one of our stock products just won’t work for one reason or another. For instance, when an exotic material of construction is required for heat or corrosion concerns, a special length or size is needed for space constraints, etc.
Other times, though, we can use a stock product for something other than what everyone else uses it for. We’ve sold Air Amplifiers for use in vacuum chucking, and pick-and-place applications – those are normally the realm of our E-Vac Vacuum Generators. Speaking of E-Vacs, they’ve been used to deflate basketballs.
And speaking of E-Vacs (still,) I had the pleasure of helping a long-time customer solve a new problem in their growing manufacturing business. They put their consumer products in blister packages, and recently converted one of the lines that picks & places the plastic “blister” onto the cardboard “backer” from two at a time, to six at a time. They were using a Model 810003M E-Vac High Vacuum Generator, which worked fine, every time, with two Model 900762 1″ x 1/2″ Oval Vacuum Cups, but when they put four more of those Vacuum Cups on, they weren’t able to pick all six “blisters” every time.
These plastic blisters are smooth and non-porous, so this a “textbook” application for a High Vacuum Generator. They’re also VERY lightweight, and were picked in a horizontal motion, so the 27″Hg that the Model 810003M can generate wasn’t actually necessary. By replacing it with a Model 800003M E-Vac Low Vacuum Generator, the extra vacuum flow solved the problem, with no increase in compressed air consumption, which was critical for this area of their operation.
EXAIR Intelligent Compressed Air Products can solve many of your industrial/commercial challenges. Our catalog documents the ones they’re aimed at. Others need to be addressed by knowledge and experience…and maybe a little theory to practice. If that’s the case, call an EXAIR Application Engineer. We’re here to help, and we’re pretty good at it.