EXAIR Won’t Keep You Waiting For Anything

Have you ever sent an email, or left a voice mail message for someone without knowing they were out of the office? It can be pretty frustrating to not hear back from someone, especially if your needs are urgent.

At EXAIR, we make sure this doesn’t happen:

*For starters, we don’t have an automated attendant…if you call EXAIR during normal business hours, you’re going to talk to a real live human being.

*What’s more, that real live human being is going to be one of our Customer Service Representatives, and they can answer any questions you might have about price and availability of any of our Engineered Compressed Air Products.

*If you need detailed technical information, they’ll transfer you to an Application Engineer…and they are always keenly aware of who’s available & who’s not.  You won’t get anyone’s voice mail unless you specifically ask for it, and if one of us is on vacation (and won’t be able to return your call for a number of days,) you’ll know that before you’re transferred to leave that message.

*Not only that, but we’ve got a system in place to monitor each other’s emails.  Which brings me to the success story that inspired this blog:

It’s vacation season, and another of us took off for some well deserved R&R with the family.  According to The System, I get to check those incoming emails while this co-worker is out.  And he (like the rest of us) gets a LOT of emails.  Some are new requests for application/performance data, and some are continuing conversations of the details of (sometimes) complex applications.  Like the project he was working on with a customer who wanted to use Air Knives to blow off a continuous strip of material exiting a wash/rinse vessel.  After a discussion of the details of the application, they had decided to try (2) Model 110003 3″ Aluminum Super Air Knives, one mounted on either side, to “strip the strip.”  And it worked perfectly.  They just wanted to run the details of this first installation by us before doing the other seven.  Part of my process was to go back through the chain of emails…while this looked pretty straight forward, the devil is indeed in the details, and I hate that guy.  But, try as I might (sorry; I’m an engineer,) I could not find fault, or room to improve, with the setup they designed…it was most pleasantly devil-free.

Compact, efficient and quiet, the EXAIR 3″ Super Air Knife is an ideal blow off solution for a variety of applications.

Anyway, with my agreement that their installation was indeed optimal (it’s exactly what I would have done too, for the record,) they placed an order for the (14) Super Air Knives to outfit the other (7) wash/rinse operations.

If we were keeping score, it would be coworker-2, Russ-14.  But we’re not.  Lest my record suffer when I “break for the Lake” in June.  By then, it’ll be Cabinet Cooler Season, and I almost hate to miss a week of that.  Almost.

Man, I don’t even take long pants with me to the Lake.

If you have questions about compressed air products or applications, we’ve got answers.  Live and in real time, every day.  Call us; let’s talk.

Russ Bowman
Application Engineer
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The Effect of Different Vortex Tube Generators on Cold Flow

A Vortex Tube cooling kit is helpful when flow and temperature requirements are unknown. The experimental kit affords you the flexibility to determine your cooling needs.

I recently had a customer e-mail me with this inquiry. Following is our discussion:


We have a small vortex (3208) and a set of generators, the one that is pre-installed in the Vortex Tube (8GR) and a few more:

2GR, 4GR, 2GC, 4GC, 8GC

Maybe you could tell me the effect of these generators on the cold flow.

My main application is to refrigerate tools during machining or cool ultrasonic transducers during continuous operation. My compressed air source is 6.5 BARG. Using the Vortex Tube as it comes, after closing the hot flow and opening it a revolution, I can reduce the temperature from 22ºC (room temperature) to -6ºC (measured in the cold air flow at the output). How do I use the flow generators?

Thank you for your question concerning the generators which are interchangeable on the Vortex Tube.  The purpose of the various sizes and types is explained as follows:

GC vs. GR designation: The GC type generators are designed to achieve maximum temperature drop for applications which may need an airflow which is below 0 degrees F. It is unusual that an industrial cooling application would need air this cold, but some scientific and other similar academic pursuits do need air flows that cold. The thing you give up when you try to achieve low cold temperature is the flow. Flow and temperature drop are inversely related to one another with a vortex tube’s function.

The GR type generators are used for temperatures down to zero degrees F. So, these would be the more prominently used generators for industrial applications. We usually will set up a Vortex Tube in a cooling application to have about 50 degree F temperature drop and can still preserve 80% of the total flow for cold flow applications. This is what we refer to as maximum refrigeration settings.

As for the numbers on each generator (2, 4 or 8) this is the indication of the amount of air volume consumed by the Vortex Tube when this specific generator is installed. The flow rate is indicated in SCFM with 100 PSIG inlet working pressure. So an 8 SCFM @ 100 PSIG flow rate is what is determined by an 8-GR or 8-GC generator. Small Vortex Tubes are available in flows of 2, 4 or 8 SCFM.

Basically, the larger your flow rate, the more cooling power you can generate. Think of the cold air as ice. Think of 8 SCFM as a 55 gallon drum of ice and a 2 SCFM as a 5 gallon bucket of ice. Both have the same temperature, but the 55 gallon size has potential to do more work to cool down a larger heat load.

Creating a spot of heat with a torch or an electric heating element is not hard to do with common tools found in a manufacturing environment. Creating a spot of cold air for similar situations is a very tough thing to do in the same situation. A Vortex Tube is a handy and convenient tool to allow for the spot cooling or small chamber cooling applications.

If you have a spot cooling application you think we may be able to help with, please contact us by e-mail, chat, Face Book, Twitter, phone or fax. We will be glad to assist.

Neal Raker, Application Engineer