EXAIR’s Air Wipes provide a 360° uniform, high velocity airflow that adheres to the outside surface of a round part, such as pipe, hose, cable, etc., as it passes through the throat or center of the device.
In this short video, we show how to change the shim inside of an Air Wipe, letting you achieve an increase or decrease in outlet flow and force while maintaining the same operating pressure.
If you have any questions, please contact an Application Engineer at 800-903-9247.
Several years prior we had a customer that was using a block-type Air Wipe from a competitor to remove water from an extrusion. These air wipes were built using materials similar to UHMW and the 2 halves were hinged with air holes drilled into it. They were using these block air wipes on several lines and decided to try an EXAIR Super Air Wipe after contacting our Application Engineers. The interesting point was that it required 5 block type air wipes to equal the efficiency of 1 EXAIRSuper Air Wipe.
Since one EXAIRSuper Air Wipe equaled the performance of 5 of the competitor’s products it consumed less air, was less expensive and produced less noise. Also in space sensitive applications the EXAIR Super Air Wipe is much thinner than the block type. To highlight this the Super Air Wipe is 1.13″ thick on all 11 models that range from 3/8″ to 11″ throat diameter.
Another clear advantage is performance. The block air wipe performance can only be changed by altering the inlet air pressure while the EXAIRSuper Air Wipe can also be changed by adjusting the inlet air pressure or changing the air gap of the Air Wipe. Simply by changing out an internal shim, the air gap will allow more or less volume of compressed air at a given pressure. By changing shims and adjusting pressure, EXAIR Super Air Wipes provide the flexibility which leads to a successful application across industry.
Compressed air flows through an inlet (1) of the Air Wipe into an annular chamber (2). It is then throttled through a small ring nozzle (3) at high velocity. This primary airstream adheres to the Coanda profile (4), which directs it down the angled surface of the Air Wipe. A low pressure area is created at the center (5) inducing a high volume flow of surrounding air into the primary airstream. As the airflow leaves the Air Wipe, it creates a conical 360° ring of air that attaches itself to the surface of the material running through it (6), uniformly wiping the entire surface with the high velocity airflow.
EXAIR’s GEN4 Super Ion Air Wipe provides a uniform 360° ionized airstream that is simple to clamp around a part for reducing static electricity and cleaning contaminants. It is great for use on pipe, cable, extruded shapes, hose, wire and much more. We offer the GEN4 Super Ion Air Wipe in either 2” or 4” inner diameter, it is powered by compressed air and an external power supply. The GEN4 Super Ion Air Wipe generates both positive and negative ions that are transmitted the emitter points located on the i.d. of the wipe. Since static charges can be either negative or positive it is easy to eliminate both states of charge due to the mixed polarity of ions being generated. The power supplies are available with either 2 or 4 outlets (can power up to 2 or 4 GEN4 Static Eliminators simultaneously) and are UL recognized, CE and RoHS compliant. The power supplies also have a selectable input voltage for either 115 or 230VAC.
Another great feature of the GEN4 Super Ion Air Wipe is the split collar design that utilizes a clamp and hinge making it easy to clamp around the surface of the material moving through it eliminating the need for time consuming “threading”.
How does the Super Ion Air Wipe work? The Super Ion Air Wipe envelopes the part passing through it with a stream of compressed air to strip contaminants and bathes it with ions to diminish any static charge. The airflow follows the surface of the material passing through it and can be effective up to 15′ (4.6m) away from where the Super Ion Air Wipe is located. The optional pressure regulator allows for fine adjustments of the air volume and velocity and the optional shim set allows for large air volume and velocity adjustments.
If you would like to discuss reducing static and/or cleaning of continuous runs of materials, I would enjoy hearing from you…give me a call.
There is rarely a day that goes by that I don’t receive a call from someone who has a need for a compressed air product and when I state the SCFM requirements of the device they respond back with the psi rating of their air compressor. Many technicians simply do not understand the difference between the two. Simply put psi (pounds square inch) is force and CFM (cubic feet per minute) is flow.
A simple illustration would be to contrast a 12 VDC powered air compressor that many people carry in their trunks to inflate car tires. They will inflate your car tire to 35 psi in a matter of minutes. While the air compressor at a tire shop can inflate a car tire in a minute or less. What is the difference?
Simply put, the flow. Both inflate the tire to the desired pressure but the one with largest flow (volume) does it much faster. In the case of a compressed air product such as an air nozzle, the pressure required to operate is only one part of what is necessary to operate the device effectively, you need to have enough flow or CFM.
Let us now consider an EXAIR 1100 Super Air Nozzle, its rated performance of 13 ounces of force at 12″ distance from the nozzle is derived from supplying 14 SCFM @ 80 psi. The typical home use air compressor that runs on 110 VAC (Generally 2 HP maximum) will not generate the flow (volume /CFM) at 80 psi to run the nozzle at peak force, just as it would not generate enough flow to fill the tire as quickly as the industrial compressor at a tire shop.
When an open tube, pipe or inefficient nozzle is placed at the end of an air line to provide blow off for cooling or cleaning it demands much greater volume from the compressor. If the compressor cannot keep up the force (pressure) of the system will decline. Replacing an open tube or pipe with an EXAIR engineered nozzle will require less compressed air volume which, in turn, will give the compressor more ability to provide full pressure and force upon your application.
If you would like to discuss air consumption of any of EXAIR’s engineered solutions, I would enjoy hearing from you…give me a call.
If you’ve ever used an air gun to blow something off, you’re familiar with the cleaning ability of compressed air. If you can get the whole object blown off from where you’re standing, there really is no substitute…but what if you need to get to the other side…or sides?
This is where the EXAIR Super Air Wipe comes in…they allow you to blow a continuous, uniform 360° air stream, all around your product. Consider their benefits:
*Sizes: the Super Air Wipe’s compact ring design means it won’t take up a lot of room; you just need a few inches, in any direction, to install one. We stock them in eleven sizes, from 11″, all the way down to our brand-new 3/8″ diameter.
*Durability: All EXAIR Super Air Wipes are assembled with stainless steel shims and hardware. Models up to 4″ come with a rugged, stainless steel wire braided hose, connecting the two halves for compressed air supply.
*Ease of installation: Smaller sizes can be supported by the compressed air supply line, if a pipe is used and threaded into the connector hose’s 1/4 NPT port. Larger sizes can likewise be adequately supported with pipe to both halves. All models have a bolt circle of 1/4″-20 tapped holes for more permanent and rigid mounting. The split ring design is another key feature:
*Corrosion resistance: Depending on the environment in which the Super Air Wipe will be installed, we offer them with aluminum (3/8″ – 11″ sizes) or stainless steel (3/8″ – 4″ sizes) bodies.
*Temperature rating:Aluminum Super Air Wipes are good to 400°F (204°C) and stainless steel models are good to 800°F (427°C.)
*Range of operation: We install a 0.002″ thick shim in all stock Super Air Wipes; this is suitable for a wide range of typical industrial/commercial blow off applications…a Pressure Regulator can then be used to “dial in” the air flow precisely to meet specific needs. If a job calls for higher force & flow, additional 0.002″ shims can be installed. Shim Sets come with the Super Air Wipe Kits, or individual shims can be ordered separately.
*Performance: Before the Super Air Wipe, a ring of nozzles was commonly used. In fact, they still are, but we’re trying to fix that, at every opportunity we come across. Problem with those is, it’s hard to get an even air flow all around, which leads to inconsistent blow off. They can also be loud & inefficient, as we’ve found in numerous Efficiency Lab tests and Case Studies, like this one…
…and this one…
Do you have a challenging blow off application that you need help with? Call us to find out how an EXAIR Super Air Wipe (or another one of our Intelligent Compressed Air Products) can be a simple, quick & easy solution.
A close relative to the Super Air Knife, the Super Air Wipe provides a uniform 360° laminar airflow for blowing off, drying, cleaning, and cooling a wide variety of pipe, cable, extruded shapes, hose, and wire. Its split design allows it to be easily clamped around the surface of the material without having to “feed” the material through.
The Super Air Wipe is available in aluminum construction in sizes ranging from 3/8” – 11” diameter. All Super Air Wipes comes with stainless steel hardware and stainless steel shims. Sizes up to 4” include plumbing to supply both halves of the Super Air Wipe. Sizes over 4” should be piped directly to each ¼ NPT compressed air inlet on each half. In addition to aluminum construction, the Super Air Wipe is also available in 303 stainless steel for corrosive or high temperature applications. The Stainless Steel Super Air Wipe can withstand temperatures up to 800°F and is available in sizes from ½”-4” from stock.
Much like the Super Air Knife, the Super Air Wipe has ¼-20 tapped holes along the downstream side that can be used for mounting. Smaller Super Air Wipes can be supported by rigid compressed air pipe that is used to supply the unit. The Super Air Wipe is also infinitely adjustable through the use of shim sets or a pressure regulator. Kits will include the Super Air Wipe, shim set to make gross adjustments to the airflow, an auto-drain filter to keep the air clean and dry, and a pressure regulator. By adjusting the input supply pressure to the Super Air Wipe, you regulate both the force and flow that is projected onto the target material. Increasing the input supply pressure will increase both the force and flow from the Super Air Wipe. This video blog demonstrates how effective the Air Wipe is when drying 1-1/2” PVC pipe:
If you’re processing any type of hose, wire, or extruded shapes that could benefit from installing a Super Air Wipe, give us a call. With all sizes shipping from stock on an order received by 3:00 pm EDT we can have one to you as early as tomorrow!
EXAIR’s Engineered Air Nozzles and Air Jets provide a simple solution to lower compressed air usage and reduce noise levels for compressed air blowoff operations.
Why Air Nozzles and Jets – When compared to commonly used open copper tubes or pipes, compressed air savings can be as high as 80%. And with less compressed air, sound levels are greatly reduced. A 10 dBA noise level reduction is typical. All EXAIR Air Nozzles and Jets meet the Occupational Safety and Health Administration (OSHA) maximum dead end pressure and sound level exposure requirements. They also carry the CE mark.
EXAIR Nozzles are engineered to take advantage of the Coanda effect to amplify the airflow up to 25 times or more. Compressed air is ejected through the small orifices and surrounding air is entrained into the main stream. The resulting air stream is a high volume, high velocity blast of air at minimal consumption. EXAIR manufactures many styles, from the very small, but powerful Atto Super Air Nozzles, to the largest 1-1/4 NPT Super Air Nozzle. Also offered are 1″ and 2″ wide Flat Super Air Nozzles, and the Back Blow style for cleaning out tubes, pipes, channels or holes from 1/4″ to 16″ in diameter.
EXAIR Air Jets utilize the Coanda effect (wall attachment of a high velocity fluid) to produce air motion in their surroundings. A small amount of compressed air (1) is throttled through an internal ring nozzle above sonic velocity. A vacuum is produced, pulling in large volumes of surrounding, or ‘free’ air, through an around the jet (2). The exit flow is the combination of the two air sources (3).
EXAIR manufactures Air Jets in two types, High Velocity, and Adjustable with materials of construction of brass and Type 303 Stainless Steel. The High Velocity Air Jet uses a changeable shim to set the gap, controlling the force and flow of the air. The Adjustable does not use a shim, and has a micrometer gap indicator and locking ring to allow for varying force and flow performance.
If you have questions about Air Nozzles and Jets, or would like to talk about any EXAIR Intelligent Compressed Air® Product, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.