A manufacturer of high speed industrial machinery makes a sorting machine for seeds. There’s a clear plastic cover for operators to see the seeds as they pass through the machine. Many seeds are dense enough to move right on through, but some lower density seeds (canola, lettuce, and flax seed, specifically) bounce around a bit, and even the slight static charge that builds up as they move through causes them to cling to the inside of that viewing window.
This was a great fit for our Model 8406 6″ Gen4 Standard Ion Air Knife Kit…”fit” being the operative word. While the Super Ion Air Knives are more efficient and quieter, there simply wasn’t very much room at all for mounting inside, so the smaller profile of the Standard Ion Air Knife made all the difference in the world. Also, since they just need static dissipation of such a small area, and not much flow at all is required to blow off these lightweight seeds, the differences in compressed air consumption and sound level were not very much at all.
Recently, I was working with a customer looking for a Premium Reversible Drum Vac and wanted it shipped to the Northwest Territories of Canada – which we could do! It got me to thinking, what are the farthest US state and territory locations EXAIR has shipped to in the North, South, West and East directions. I ‘scoured’ the records and came up with these.
Furthest North- We have shipped to Prudhoe Bay, Alaska. Most recently, believe it or not, we shipped a NEMA 4X Cabinet Cooler to an Oil and Natural Gas Exploration Company. Goes to show that even the coldest environments still have the need to provide cool, clean, dry air to cool and protect electronics in electrical enclosures.
Furthest South – We have shipped to the US Territory of Puerto Rico, city of Santa Isabel. An Aerospace company needed a strong, laminar blast of air and utilized a 6″ Stainless Steel Air Knife. An Air Knife offers a quiet, efficient way to clean, dry or cool parts, webs, or conveyors.
Furthest West- We have shipped to the US Territory of Guam. The local University ordered a model 1111-4 Super Air Nozzle Cluster, for a good strong blast of air flow for a cleaning operation. The model 1111-4 delivers 3.2 lbs of force, at just 82 dBA of sound. A safe and efficient nozzle for blowoff operations.
Furthest East- We have shipped to Eastport, Maine. The customer in Eastport ordered a Line Vac and a section of Conveyance Hose. The Line Vac is a great tool for conveying large volumes of material over long distances, through a standard hose or tube. The compact design features large throat diameters for maximum throughput capability.
It was interesting to look back and see all the places that EXAIR has shipped. We have customers from all over the globe. If you are outside the of 50 US States and Canada, we have a dedicated team of International Application Engineers that will work with you to select the best EXAIR product for your process and application, and direct you to your local International Distributor.
If you would like to talk about any of the EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.
EXAIR manufactures the line of air knives known as the Super Air Knife. We pride ourselves on the wide array of material types and lengths that we offer, all from stock.
The Super Air Knife is the latest generation of engineered air knife that dramatically reduces compressed air usage and noise when compared to other blowoffs. It is a very efficient way to clean, dry, or cool parts, webs, or conveyors. It delivers a sheet of laminar air flow across the entire length, with a smooth and consistent delivery of air.
In order meet process environments that may be hot or corrosive in nature, EXAIR offers the Super Air Knife in four standard materials. The materials for stock air knives are aluminum, Type 303 stainless steel, Type 316 stainless steel, and PVDF (Polyvinylidene Fluoride.) Aluminum is well suited for a wide variety of environments where corrosion or contamination is not a factor. Type 303 stainless steel is a very common grade of stainless steel, and is good for mildly corrosive environments up to 400 °F. Type 316 stainless steel offers excellent corrosion resistance, better strength properties, and resists pitting. It can handle temperatures up to 800°F. Lastly, the PVDF air knives offer many benefits including resistance to UV light, inorganic chemicals, solvents, ozone, acids, weak bases and salts and can withstand temperatures up to 275°F. If there is a certain material required, EXAIR can also do custom Super Air Knives and have done them in PVC and other plastics. Check out this write up about a very unique custom material Super Air Knife that we made.
Not only is there a wide offering of materials of construction to meet the process needs, the Super Air Knives are available in many lengths to fit into the space available. From stock, we offer Super Air Knives in these lengths-
If a special length knife is needed, or one longer than the 108″, the Super Air Knives can be coupled utilizing the stocked Air Knife Coupling Kit to join multiple air knives as needed. If space is an issue, and certain length that is not stocked is needed, just give us a call – we can manufacture them to your specifications, to the exact length that you need. It takes just a few days and then the Super Air Knife of exactly the proper length will be on its way.
If you have questions about the Super Air Knives, or would like to talk about any of the EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.
Intelligent Use of Compressed Air – Most industrial facilities have at least one air compressor. The compressor is used to power anything from pneumatic tools, air powered equipment, compressed air cylinders, blowoffs and many more types of operations. Improper use of compressed air can lead to unnecessary energy costs, high noise levels and dangerous exposure of personnel to high pressure air.
The EXAIR Super Air Knife uses only 1/3 of the compressed air of typical blowoffs.
By taking advantage of the Super Air Knife’s highly efficient design and the action of air entertainment, the Super Air Knife draws in large amounts of surrounding free outside air into the air stream. The result is a strong powerful air flow made up of a small amount of compressed air and a large amount of ambient air.
Compressed air flows through an inlet (1) into the plenum chamber of the Super Air Knife. The flow is directed to a precise slotted orifice. As the primary airflow exits the thin slotted nozzle (2), it follows a flat surface that directs the airflow in a perfectly straight line. This creates a uniform sheet of air across the entire length of the Super Air Knife. Velocity loss is minimized and force is maximized as room air (3) is entrained into the primary air stream at a ratio of 40:1. The result is a well defined sheet of laminar airflow with hard-hitting force and minimal wind shear is delivered.
By using a Super Air Knife – and the advantage of the high amplification via air entertainment – for part blowoff, cooling, or drying you can reduce energy costs, reduce noise levels, and eliminate harmful dead end pressures. Other air knives typically entrain surrounding air at a ratio of 30:1 or less.
EXAIR offers the Super Air Knife with materials of construction of aluminum, Types 303 and 316 Stainless Steel, and PVDF to cover a wide variety of application temperatures and environments. Other materials may be possible, pending review by our Product Design Engineers. The Super Air Knives are offered as the knife only, as part of a full kit, which also includes a shim set, auto drain filter separator, and pressure regulator. The Super Air Knife can be fitted with Plumbing Kits and/or Electronic Flow Control making installation easier and help to save on air usage.
If you have questions about Super Air Knives, 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.
The following short video explains the differences between the 3 styles of Air Knives offered by EXAIR – The Super, Standard and Full-Flow. All of these Models are IN STOCK, ready to ship, with orders received by 3:00 PM Eastern.
If you need additional assistance choosing your EXAIR Air Knife, please contact an application engineer at 800-903-9247.
The Super Air Knife is the latest generation of EXAIR engineered air knife that dramatically reduces compressed air usage and noise when compared to other blowoffs.
From the chart above, the Super Air Knife when supplied with 100 PSIG of compressed air has a sound level of just 72 dBA (A-weighted decibel scale) when measured from 3′ away. 72 dBA is a moderate sound level, and some common comparisons are ‘normal speaking voice’ at 70 dBA and ‘living room music’ at 76 dBA.
For many processes, such as a bottling line drying operation, a pair of the air knives delivers the best performance. When asked, “what is the sound level for (2) of the knives,” a little Acoustic Engineering is in order. Because the decibel scale is logarithmic, the result is not as simple as adding 72 + 72 = 144. 144 dBA is in the range of a jet aircraft take off! Thankfully, both the actual sound level and the numerical value are determined another way. I’ll spare you a lot of the math but the equation is as below.
… where SL1, SL2, SL3 are the sound levels in dBA of the each sound makers, for as many that are being combined.
In the case of (2) Super Air Knives operated 100 PSIG, the combined sound works out to be a quiet 75.0 dBA — a powerful, efficient and quiet product ideal for many applications and process within the manufacturing environment.
As a helpful rule of thumb- combining any (2) items will yield an increase of 3 dBA, combining (3) results in a rise of 4.8 dBA, and combining (4) results in a 6 dBA rise over just (1) of the items.
The Super Air Knives have been successfully used in a wide range of applications, including part drying, sheet and conveyor cleaning, web cooling, scrap removal, pre-paint dust blowoff, and many, many more.
To discuss your application and how an EXAIR Intelligent Compressed Air Product can make your process better and quieter, feel free to contact EXAIR and myself or one of our other Application Engineers can help you determine the best solution.
Many times we receive a call from a customer looking for an Air Knife but they are unsure which design is the best to suit their needs. With 3 options to choose from, the Super Air Knife, Standard Air Knife and Full-Flow, it can seem like a somewhat daunting task so lets take a look at some of the key differences between the units. We keep all of these models in stock and can ship same day on orders we receive by 3 pm.
Let’s start with our most popular choice, the Super Air Knife. The Super Air Knife is our most efficient unit, using a 40:1 amplification rate of entrained surrounding air to compressed air, it consumes only 2.9 SCFM per inch @ 80 PSIG while maintaining a low sound level of 69 dbA. This unit produces a laminar airflow across the entire length of the knife and there are air inlets on each end, as well as on the bottom. We offer lengths from 3″ up to 108″ in aluminum, 303ss, or 316ss. Additionally we offer lengths up to 54″ in PVDF (Polyvinylidene Flouride) for applications requiring superior chemical resistance, like those associated to acids, solvents or aggressive chemicals. There are 1/4-20 tapped holes on the bottom of the knife which can be used for mounting. We recommend the Super Air Knife most often because it uses the least amount of compressed air and has the most even airflow from end to end.
Secondly we offer our Standard Air Knife which provides a 30:1 amplification rate, consuming slightly more compressed air at 3.4 SCFM per inch @ 80 PSIG. These units are louder at 83 dBA and feature air inlets on each end. Lengths available from 3″ up to 48″ in aluminum or 303ss construction. The airflow length is 1″ smaller than the length of the knife (1/2″ of no flow on each end), for example a 12″ Standard Air Knife has a 13″ physical length with a 12″ airflow length. This is the first knife we ever manufactured and is a solid choice with good performance.
Lastly, the Full-Flow Air Knife. Again providing a 30:1 ratio of entrained ambient air to compressed air, has the smallest dimensional footprint. Air consumption is slightly less than the Standard Air Knife at 3.1 SCFM per inch @ 80 PSIG with an airflow length equal to the length of the knife. We offer lengths from 3″ up to 36″, again in aluminum and 303ss and the air inlets are on the back of these units. The Full Flow Air Knife fills the need for customers with limited mounting space and who cannot fit a Super Air Knife into the desired location.
Hopefully this information will help in making the best decision to fit your needs. Of course if you still need additional support, please don’t hesitate to contact one of our Application Engineers for assistance.