Video Blog: EXAIR’s New EasySwitch Wet/Dry Vac Operation

EXAIR introduced our first Wet/Dry Vacuum in August. We have simplified the process of converting a vacuum from wet to dry (and dry to wet) materials. This can now be easily switched within 15 seconds due to its patent pending engineering and design. The video below is a quick rundown of just how easy it is to contain any industrial mess with the new compressed air powered vacuum from EXAIR.

If you would like to discuss the EasySwitch Vacuum options and kits available from stock, please contact us.

Brian Farno
Application Engineer

Pressure Gauges – Why You Need Them & How They Work

There is hardly a day I work that I am not talking about the importance of properly installed pressure gauges.  These small devices can often get overlooked or thought of as not necessary on an installation.  When troubleshooting or evaluating the compressed air consumption of an application, this is one of the first items I look for in the installation.

As Russ Bowman shows in the above video discussing proper piping sizes, you can see the importance of properly placed pressure gauges.  This shows the worst-case scenario where the pressure drop due to improper line sizes gives the false sense to the operator that they are achieving full line pressure when in fact they are not.  In order to accurately measure consumption rates, pressure AT THE INLET (within a few feet) to any compressed air product is necessary, rather than upstream at a point where there may be restrictions or pressure drops between the inlet and the gauge. So how exactly do these analog gauges measure the pressure of the compressed air at the installed locations?

Pressure Gauge Model 9011

The video below shows a great example of pressure increasing and decreasing moving the Bourdon tube that is connected to the indicating needle.  The description that follows goes more in-depth with how these internals function.

Most mechanical gauges utilize a Bourdon-tube. The Bourdon-tube was invented in 1849 by a French watchmaker, Eugéne Bourdon.  The movable end of the Bourdon-tube is connected via a pivot pin/link to the lever.  The lever is an extension of the sector gear and movement of the lever results in rotation of the sector gear. The sector gear meshes with spur gear (not visible) on the indicator needle axle which passes through the gauge face and holds the indicator needle.  Lastly, there is a small hairspring in place to put tension on the gear system to eliminate gear lash and hysteresis.

When the pressure inside the Bourdon-tube increases, the Bourdon-tube will straighten. The amount of straightening that occurs is proportional to the pressure inside the tube. As the tube straightens, the movement engages the link, lever, and gear system that results in the indicator needle sweeping across the gauge.

If you would like to discuss pressure gauges, the best locations to install them, or how much compressed air an application is using at a given pressure, give us a call, email, or chat.

Brian Farno
Application Engineer

The Bernoulli Principle

When catapults would hurl stones and projectiles at castles there weren’t thinking of how the stones flew or what could make them fly better, often they went with the “Tim Taylor method” of MORE POWER.  It wasn’t until thousands of years later that mathematicians started to talk about gases and liquids and how they react to different scenarios. Things like how does air react to a stone being launched through it. Johann Bernoulli played a significant role and calculated a lot of this out throughout his life and discovered what is now called the Bernoulli Principle.

Bernoulli discovered that when there is an increase in the speed of a fluid, a simultaneous decrease in fluid pressure occurs at the same time. This is what explains how a plane’s wing shape matters. It also can showcase how a curveball coming into the strike zone can fall out and cause an outlandish “STTTeeerriike Three” from the umpire. It is also sometimes confused with the Coandă effect. While both effects have a tremendous impact on our modern lives, the best way I have learned these effects is through videos such as the one below.

As mentioned within the video, there are numerous effects that can closely relate to the Bernoulli effect, the best example I see is the curveball which when implemented correctly can cause a very upset batter, while the pitcher has the game of his or her career.

If you would like to talk about some scientific discoveries that have you puzzled, or if you want to figure out how we can use one of these effects to help your application, contact us.

Brian Farno
Application Engineer


Video Source: Fizzics Organization – 10/8/2014 – retrieved from

Line Vac Video: Air Operated Conveyor Conveying Raw Coffee Beans

At EXAIR we’re committed to providing customers with as much information as possible to ensure an application will work the way it’s intended. If it happens to be something we’ve dealt with before, it’s easy enough to make a recommendation. If it’s not, with EXAIR’s 30 Day Unconditional Guarantee getting something in-house to test comes with no risk at all. If it doesn’t work, just send it back, simple as that!


If it is something that we can test ourselves, we’re more than happy to. We recently have taken several requests from customers in the coffee industry, all looking for a similar solution: conveying raw coffee beans. While we were confident in the ability of the Line Vac to transfer those beans, it wasn’t a material that we had ever actually tested here in our shop. A quick trip down the road to a local coffee roaster, and we had some raw coffee beans that we could use for a quick conveyance test. Check out the video below of my colleague John Ball and I conducting a test with our Model 6084 2” Line Vac:

If you’re looking to convey bulk materials using the Line Vac, but have reservations regarding the performance, you can also send a sample of your material in for testing here at EXAIR. We’ll be happy to put the conditions of your application to the test and share the results with you. If you’ve been manually transferring bulk material and are looking for a safer, reliable, and efficient solution the Line Vac is the right tool for the job. With a variety of sizes and materials all available from stock, we’re able to address countless applications and achieve a wide variety of conveyance rates.

The conveyance rate of the Line Vac is easily adjusted. By regulating the input pressure supplied to the Line Vac, not only can you reduce the necessary compressed air demand but you can also control the amount of material flow. Higher pressures will move material, while lower pressures will reduce compressed air consumption. If you need help determining which size and material is most suitable for your application don’t hesitate to get in touch with an EXAIR Application Engineer today. Stop having your operators climbing up and down that ladder to dump material!

Tyler Daniel
Application Engineer
Twitter: @EXAIR_TD