At EXAIR, we know compressed air, and we’ve been helping customers around the world get the most out of their compressed air systems since 1983. It was only logical that, about ten years ago, we got into using compressed air for liquid atomization. If you’re looking to spray a liquid in a fine mist with a controllable pattern & flow rate, there are many advantages to using compressed air to atomize it:
Optimal, efficient consumption
Small droplet size
Since their introduction, EXAIR has come to offer 142 distinct models of Air Atomizing Spray Nozzles, and, along the way, we leveraged our engineering, machining, and manufacturing prowess to gain position as an industry leader in liquid spraying. So much so, that, earlier this year, we introduced a spraying product line that doesn’t require compressed air: the FullStream Cone Liquid Atomizing Nozzles. Instead of using the energy of compressed air to effect atomization, these use the energy of the liquid’s pressure and flow to change the continuous stream of liquid flow entering the nozzle into a conical spray as it exits to atmospheric pressure. Here’s how it works:
While Air Atomizing Spray Nozzles maintain their advantage of a smaller droplet size (ours consistently make droplets under 100 microns in size,) there are clear benefits in certain applications to the FullStream Cone Liquid Atomizing Nozzles:
Higher liquid flow rates
Increased liquid coverage
More compact design
These are all important in applications like quenching, cooling, foam breaking, lubricating, degreasing, and sanitizing. All stainless steel construction means they’ll stand up to a variety of chemicals…both in what’s being sprayed, and in the environment in which they’re installed.
The Vortex Tube might be just about the most interesting compressed air device around. They have no moving parts, and they don’t need any but a compressed air supply, which they ‘split’ into a hot air stream, and a cold air stream.
The Vortex Tube, right out of the box, is easily adaptable to a wide range of cooling (or heating) applications. If your needs are specific, though, we can customize a Vortex Tube to meet them:
Material of construction: our stock Vortex Tubes are made of 303SS and are equipped with a plastic Generator and Buna o-ring.
For high temperature (>125F ambient) applications, we can install a brass Generator and Viton o-ring, suitable for ambient temperatures up to 200F.
If the environment is particularly aggressive, or if industry codes (I’m looking at you, food & pharma) call for it, we can also make them out of other materials. We’ve, for instance, made them out of 316SS, complete with material certifications, when needed.
Flow & temperature: the Hot Valve can be opened or closed to dial in a particular Cold Fraction (that’s the percentage of the supply air which is directed to the cold end.) If you know what flow rate and temperature you want, we can replace the Hot Valve with a non-adjustable plug, so your Vortex Tube’s cold flow is only dependent on the compressed air supply temperature and pressure.
Accessories: if you’re looking for features like a magnetic base, or a flexible cold air hose, you might consider an Adjustable Spot Cooler. If you like the idea of tool-free change of air flow/temperature, that’s definitely the way to go. If you want those other options, and don’t mind using a screwdriver to adjust the Cold Fraction, those other options are compatible with any Medium Vortex Tube.
These are just a few of the most common possibilities for customizing a Vortex Tube. If you have a spot cooling application you’d like to discuss, give me a call.
Visit us on the Web
Follow me on Twitter
Like us on Facebook
As we head in to the colder months here in Ohio, I will soon be getting my humidifier out of the basement and set up in my bedroom. The dry air that accompanies the onset of winter chaps my lips, cracks the skin on my knuckles, affects my nasal passages, and oftentimes makes me wake up with a sore throat…something I definitely don’t want to happen in the middle of a pandemic! So I put some water vapor in my home’s air, on purpose, to take care of all of that.
Moisture in an industrial compressed air system, however, isn’t good for anything. It’ll corrode your pipes, get rust in your pneumatic tools, motors, and cylinders, and spit out of your blow off devices, all over whatever you’re using your air to blow off. Depending on the type of compressor, where, and how, it’s used, there are different types of dryers. Today, dear reader, we’re taking a look at one of the most basic moisture removal systems: the deliquescent dryer. The principle of operation is as follows:
Incoming compressed air enters near the base, where a form of mechanical separation occurs…the air flows back & forth, around trays of desiccant. The simple act of changing direction causes a certain amount of free liquid to just fall out and collect in the bottom.
The air then flows upwards through the desiccant bed. The desiccant in a deliquescent dryer absorbs moisture (as opposed to the adsorption that occurs in a regenerative desiccant dryer) until they get so wet, they dissolve.
The desiccant level has to be monitored (commonly via a sight glass) so it can be replaced as it’s consumed.
After the desiccant does its job, moisture free air flows out the top, and gets on with it’s work.
Deliquescent dryers, owing to their simplicity, are the least expensive air dryers. They have no moving parts and no electricity, so the only maintenance involved is replacing the desiccant media as it’s consumed. This makes them especially popular in mobile/on-site applications involving portable or tow-behind, engine driven compressors, since they don’t need power to run.
There are several disadvantages, also owing to their simplicity:
The deliquescent media has to be periodically replenished. If you don’t stay on top of it, you can find yourself shut down while you go back to the shop to get a big bag of salt. That’s time your boss can’t charge your customer for. Also, the cost of the new media is a continual operating cost of the dryer…something you don’t have to account for with the regenerative desiccant models.
Disposal of the waste media can be a concern…you definitely want to check your local environmental regulations before dumping it in the garbage. Your boss won’t like talking to the EPA about THAT either.
They have to be equipped with a particulate filter on the discharge to keep the deliquescent media (which, being a salt, is corrosive in nature) from entering your system. That would be even worse than water moisture…which this is there to prevent in the first place.
They don’t get near as low of a dewpoint as other dryers – the best you can hope for is 20°F to 30°F. Which is fine, given the above mentioned nature of applications where these are commonly used. You just wouldn’t want to use them to supply a product like an EXAIR Vortex Tube…which can turn that in to -40°F cold air, causing the water vapor to turn to liquid, and then to ice. In a hurry.
EXAIR Corporation is in the business of helping you get the most out of your compressed air. If you want to learn more, please follow our blog. If you have specific questions, give me a call.
Russ Bowman Application Engineer EXAIR Corporation Visit us on the Web Follow me on Twitter Like us on Facebook
Some applications such as blowing chips or debris out of a pipe or blind hole, it may not be possible to blow forward. The pipe may be too long, making it impossible to push the debris all the way down the pipe or the other end of the pipe may not be open. In either of these scenarios, the Back Blow Nozzle is the right tool for the job. An array of holes around the diameter of the Back Blow Nozzles provides a powerful 360° airflow pattern that will clear out any leftover coolant or chips from the machining process.
EXAIR has three different size Back Blow Nozzles; the 1004SS (M4 x .5), the 1006SS (1/4 NPT), and the 1008SS (1” NPT). The 1004SS is recommended for use on pipes as small as ¼” and up to 1”. The 1006SS can be used for a wide range of pipe sizes, from 7/8” up to 4”. The 1008SS nozzle offers the greatest overall force for stubborn or sticky materials stuck to the inside diameter of the pipe. This nozzle is suitable for use in pipes ranging from 2”-16”. As the Back Blow Nozzle will be blowing chips and debris back out of the pipe towards the operator, it is always recommended that a Chip Shield is used. The strong polycarbonate Chip Shield will keep them safe from flying debris and keep you in compliance with OSHA directive 1910.242(b).
All of EXAIR’s Back Blow Nozzles are available with extensions. For the 1004SS we have extensions from 6”-36”, and from 12”-72” for the 1006SS and 1008SS. The Back Blow Nozzle can also be installed on our VariBlast, Soft Grip, Heavy Duty, and Super Blast Safety Air Guns. With such a wide range of available sizes and configurations, we can tackle just about any internal pipe cleaning application. If you have a process in your facility that may benefit from the use of one of these nozzles, give us a call and get one on order today!