Category: Vortex Tubes

Adjustable Spot Cooler from EXAIR

Published on by Jordan T Shouse2 Comments

The Adjustable Spot Cooler is a low cost, reliable, maintenance free way to provide spot cooling to a myriad of industrial applications. Simply turn the knob, and the temperature can be changed to suit the needs of the process. The Adjustable Spot Cooler delivers precise temperature settings from -30 °F (-34 °C) to room temperature.

Adjustable Spot Cooler
Adjustable Spot Cooler

The Adjustable Spot Cooler utilizes the Vortex Tube technology that converts compressed air into a cold air stream. To learn more about EXAIR vortex tubes, click here.

  • It can produce temperatures form -30 °F to +70 °F (-34 °C tp +21 °C)
  • Parts included for flow rates of 15, 25 and 30 SCFM (425, 708, 850 SLPM.) The unit comes from the factory set at 25 SCFM (708 SLPM)
  • It can produce refrigeration up to 2,000 BTU/hr (504 Kcal/hr.)

A swivel magnetic base allows for easy mounting and portability, you can move it from machine to machine as needed. The flexible cold air outlet tubing holds its position and is easy to aim. Most importantly, there are no moving parts or CFC’s, ensuring maintenance free operation.

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The Adjustable Spot Cooler maintains critical tolerances on machined plastic parts
How the Adjustable Spot Cooler Works

The Adjustable Spot Cooler incorporates a vortex tube to convert a supply of compressed air (1) into two low pressure streams, one hot and one cold. With the turn of a knob, the temperature control valve (2) allows some hot air to flow through a muffling sleeve and out the hot air exhaust (3). The opposite end provides a cold air stream (4) that is muffled and discharged through the flexible hose, which directs it to the point of use. The swivel magnetic base (5) provides easy mounting and portability.

The Adjustable Spot Cooler can produce a wide range of air flows and temperatures as determined by the temperature control valve knob setting and the generator installed. The generator controls the total SCFM (SLPM) of compressed air consumption, and is easy to change. From the factory, the 25 SCFM (708 SLPM) generator is installed, producing up to 1,700 BTU/hr (429 Kcal/hr) of cooling. For less cooling, the 15 SCFM (425 SLPM) generator can be installed, providing up to 1,000 BTU/hr (252 Kcal/hr) of cooling. And for more cooling, the 30 SCFM (850 SLPM) generator can be installed, providing up to 2,000 BTU/hr (504 Kcal/hr) of cooling.

Adjustable Spot Cooler Specifications

Two (2) Systems are available as shown below, and include the 15 and 30 SCFM (425 and 850 SLPM) generators, a filter separator, and either a single or dual point hose kit.

3825_3925 adj spot cooler

If you have any questions on how our Adjustable Spot Cooler can help save you money give us a call! One of our application engineers will be happy to assist!

Jordan Shouse
Application Engineer

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EXAIR Cold Gun Promo Starts November 1st!

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That’s right, with the start of November this year we also start our Cold Gun promotion. This promotion runs from the start of November until December 31, 2023. The best part is that Cold Guns have a long history of providing spot cooling solutions for industry. Cold Guns have been cooling product and processes for over 36 years! Take advantage of the current promotion today!

From left to right: EXAIR Mini Coolers, Cold Guns, and Adjustable Spot Coolers come with Magnetic Bases for instant installation.

The EXAIR Cold Gun promo is a great way to receive an additional tool to extend the use of the Cold Gun. With the purchase of a promotional Cold Gun System w/ Single Point Hose Kit or promotional High Power Cold Gun System w/ Single Point Hose Kit you will receive a Dual Point Hose Kit for free. This is a $48.00 USD value. The Cold Gun will drop your compressed air temperature by 54 °F when operating at 100 psig inlet pressure. Choose the standard point tip or the 1″ fan tip to blow the cold air. The total length of the flexible discharge hose is around 11″. If more coverage is needed, the promotional Dual Point Hose Kit gives around 5-6″ of straight hose before splitting into two smaller lines that offer both point or fan tip nozzles as well. This dual point can be used to reach both sides of larger diameter cutters and components that need a blast of cool air.

Single Point
Dual Point

The Cold Gun is easily setup in any machine that has a ferrous metal surface thanks to its integrated magnetic base that will hold the unit in place even when the machine is moving or vibrating. If you do not have ferrous metal available for the magnetic base, using rigid piping or even something like u-bolts to hold the unit into place is a common practice of customers who need the cooling and know the Cold Gun will perform.

Lastly, if you aren’t certain whether the Cold Gun is the solution, we have an entire team of Application Engineers here to discuss the application, and it is also backed by our 30-day guarantee so our US and Canadian based customers can order one, test it in their facility for 30 days. If they are not pleased with the performance for any reason, the item can be returned to EXAIR. If you want to discuss your application, contact us today!

Jordan Shouse
Application Engineer

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VIDEO Blog: Vortex Tubes and Cooling Kits

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EXAIR manufactures three sizes of Vortex Tubes, small, medium & large.  Each size can produce a range of cooling power that can be changed by installing a different generator that will change the volume output capability of that Vortex Tube.

If a different cooling capacity is desired, other generators are available by either purchasing them individually or by purchasing one of the (3) highly versatile Vortex Tube Cooling Kits designated as the 3908 (small), 3930 (medium) or 3998 (large).  The Kits include the Vortex Tube, Filter Separator, Vinyl Tubing, Tubing Adapter, Tube Clamps, Cold End Muffler (Optional Hot End Muffler Available) and Both “R” & “C” Generators.

If you would like to discuss Vortex Tubes, their Generators, or any of EXAIR’s safe, quiet & efficient compressed air products, I would enjoy hearing from you…give me a call or shoot me an email!

Jordan Shouse
Application Engineer

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Adjustable Spot Coolers

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What is a Spot Cooler? Well to fully understand that let’s take a dive into what a Vortex Tube is, since at its core an Adjustable spot cooler is a Vortex tube with some bells and whistles that make them easier to use!

The operation of an Vortex Tube is one of the more curious phenomena in fluidics, and a particularly unique method of producing cold air. Since they don’t perform “heat transfer” in the classical sense (see below), there’s no RATE of heat transfer…they’re generating cold air, at rated flow and temperature, instantly.

Compressed air enters the Vortex Tube (blue arrow) where the Generator imparts a spinning motion to the flow, which continues towards the “hot end” (red ribbon). The flow is forced to change directions and continue spinning, flowing in the opposite direction (blue ribbon). It’s at this point that the flow gives up energy in the form of heat, which is exhausted through the Hot Valve (red arrows) while the cold flow makes its way to the opposite end, where it exits at temperatures up to 129F colder than the compressed air supply.

EXAIR Corporation’s Vortex Tubes come in a range of sizes & cooling capacities, and are integrated into a number of Spot Cooler Products which add convenience and flexibility to their operation.

EXAIR’s Adjustable Spot Cooler incorporates this Vortex Tube technology to produce temperatures ranging from -30°F – +70°F. At a sound level of just 73 dBA when operated at 100 psig and stock generator installed, this compact cooler will keep your operation cool, clean and dry without causing unnecessarily high noise levels.

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Tolerances are maintained on plastic parts using the Adjustable Spot Cooler

Through a simple turn of the control knob, you can easily adjust the temperature of the unit. Additionally, the kits come with (2) extra generators (15-H and 30-H) that can be swapped out for the stock generator for more/less cooling power and air consumption. The 15-H generator will deliver up to 1,000 Btu/hr of cooling capacity and the 30-H will provide up to 2,000 Btu/hr of cooling capacity. We have (2) different kits available, Model 3825 Single Point and the Model 3925 Dual Point Kit. The 3825 is recommended for use in applications where you’re cooling a small surface such as solder joints, hot melts, or drilled plastics.

The 3925 system is better served when heat is generated over a larger surface area such as saw blade cooling. The kits use flexible Loc-Line hose to allow you to precisely position the cold airflow onto your target. The Adjustable Spot Cooler provides easy mounting with a swivel magnetic base, allowing you to mount the cooler directly at the most critical point that heat is being generated.

3825_3925 adj spot cooler

If you’re tired of cleaning up your coolant or have an application that requires dry machining, or you just need to cool something hot! Get one of the Adjustable Spot Cooler systems on order today. They’re in stock ready to ship!

Jordan Shouse
Application Engineer

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Twitter: @EXAIR_JS