Aluminium Standard Air Knife
Hard hitting curtain of air for web, sheet and part blowoff.
A quiet, energy efficient way to clean, dry or cool parts, webs or conveyors. The Standard Air Knife utilises the Coanda effect (wall attachment of a high velocity fluid) to create air motion in its surroundings. Using a small amount of compressed air as a power source, the Standard Air Knife pulls in large volumes of surrounding air to produce a high flow, high velocity curtain of air for blowoff.
Amplification ratios (entrained air to compressed air) of 30:1 are achieved with the Standard Air Knife, compared to 3:1 for drilled or slotted pipe. Air savings of 40% to 90% are possible when replacing these “homemade” blowoff devices. Pay-back is normally measured in weeks, not months or years.
The Standard Air Knife dramatically reduces “wind shear” by gradually introducing the entrained air to the ejected compressed air. Noise level is typically cut in half. The result is a high velocity, high volume sheet of air with reduced noise level and air consumption.
Drilled pipe or open jets, by contrast, provide minimal air amplification. They also produce unacceptably high noise levels as the compressed air shears into the still air.
Compressed air flows through the inlet (1) into a plenum chamber. It is then throttled through a thin nozzle (2) extending the length of the Standard Air Knife. This primary airstream adheres to the Coanda profile (3), which turns it 90° and directs the flow down the face of the unit. The primary stream immediately begins to entrain surrounding air (4), for an amplification ratio of 30:1 at 152mm (6″) away.
Pressure Supply | Air Consumption per Inch (25mm) | Velocity at 6″ (152mm) from target | Sound Level @ 3′ (914mm) | Force per Inch (25mm) @ 6″ (152mm) from target | ||||
PSIG | BAR | SCFM | SLPM | FPM | M/S | dBA | OUNCES | GRAMS |
20 | 1.4 | 1.3 | 37 | 4,000 | 20.3 | 65 | 0.45 | 13 |
40 | 2.8 | 2 | 57 | 5,800 | 29.5 | 74 | 1.1 | 31 |
60 | 4.1 | 2.7 | 76 | 8,500 | 43.2 | 80 | 2.0 | 57 |
80 | 5.5 | 3.4 | 96 | 11,000 | 55.9 | 83 | 2.7 | 77 |
100 | 6.9 | 4.1 | 116 | 13,000 | 66.0 | 86 | 3.3 | 94 |
Note: Performance on lengths over 36″ will
vary. Contact an Application Engineer for details.
12″ (305mm) Standard Air Knife tested with .002″ (0.05mm) thick shim
installed.
The compressed air exhausts through a gap that is set with a shim positioned between the cap and the body of the Standard Air Knife. For most applications, the .002” (0.05mm) thick shim installed in the Standard Air Knife when it is shipped works best. There are, however, some situations that require more force and flow. Thicker shims will increase the gap opening offering higher velocity and harder hitting force. Air consumption and noise will be slightly higher.
Shim sets for Aluminium Standard Air Knives include .001” (0.03mm), .003” (0.08mm) and .004” (0.10mm) thick plastic shims.
Shim sets for Stainless Steel Standard Air Knives include (3) .002″ (0.05mm) thick stainless steel shims.
(3) Model 2012 12" (305mm) Standard Air Knives perform the drying cycle in this parts washer.
A Model 2006 6” (152mm) Standard Air Knife blows powder loose from a belt so it can be vacuumed away.
A Model 2012 12" (305mm) Standard Air Knife opens mustard packets prior to fill.
A newly designed transmission pan presented a myriad of cleaning problems for the die-caster. Because the configuration included channels and blind holes as well as smooth surfaces, a “shaped” air pattern was required...
Aluminium Standard Air Knife
Type 303 Stainless Steel Standard Air Knife
Standard Air Knife Models | ||||
Standard Air Knife Only | ||||
Standard Air Knife Kits | Kits include a Standard Air Knife, shim set, filter separator and pressure regulator (with coupler). | |||
Deluxe Standard Air Knife Kits | Deluxe Kits include a Standard Air Knife, EFC, Universal Mounting System, shim set, filter separator and pressure regulator (with coupler). | |||
Standard Air Knife Shim Sets | A .002″ (0.05mm) thick shim comes installed in the Standard Air Knife. Shim Sets for Aluminium Standard Air Knives include a .001″ (0.03mm), a .003″ (0.08mm), and a .004″ (0.10mm) thick plastic shim. Shim Sets for Stainless Steel Standard Air Knives include (3) .002″ (0.05mm) thick stainless steel shims. |
Aluminium Standard Air Knife | ||||
Airflow Length | Standard Air Knife Only Model | Standard Air Knife Kit Model | Deluxe Standard Air Knife Kits Model | Standard Air Knife Shim Set Model |
3″ (76mm) | BP2003 | BP2203 | BP2203DX | 2303 |
6″ (152mm) | BP2006 | BP2206 | BP2206DX | 2306 |
9″ (229mm) | BP2009 | BP2209 | BP2209DX | 2309 |
12″ (305mm) | BP2012 | BP2212 | BP2212DX | 2312 |
18″ (457mm) | BP2018 | BP2218 | BP2218DX | 2318 |
24″ (610mm) | BP2024 | BP2224 | BP2224DX | 2324 |
30″ (762mm) | BP2030 | BP2230 | BP2230DX | 2330 |
36″ (914mm) | BP2036 | BP2236 | BP2236DX | 2336 |
42″ (1067mm) | BP2042 | BP2242 | BP2242DX | 2342 |
48″ (1219mm) | BP2048 | BP2248 | BP2248DX | 2348 |
Type 303 Stainless Steel Standard Air Knife | ||||
Airflow Length | Standard Air Knife Only Model | Standard Air Knife Kit Model | Deluxe Standard Air Knife Kits Model | Standard Air Knife Shim Set Model |
3″ (76mm) | BP2003SS | BP2203SS | BP2203SSDX | 2303SS |
6″ (152mm) | BP2006SS | BP2206SS | BP2206SSDX | 2306SS |
9″ (229mm) | BP2009SS | BP2209SS | BP2209SSDX | 2309SS |
12″ (305mm) | BP2012SS | BP2212SS | BP2212SSDX | 2312SS |
18″ (457mm) | BP2018SS | BP2218SS | BP2218SSDX | 2318SS |
24″ (610mm) | BP2024SS | BP2224SS | BP2224SSDX | 2324SS |
30″ (762mm) | BP2030SS | BP2230SS | BP2230SSDX | 2330SS |
36″ (914mm) | BP2036SS | BP2236SS | BP2236SSDX | 2336SS |
42″ (1067mm) | BP2042SS | BP2242SS | BP2242SSDX | 2342SS |
48″ (1219mm) | BP2048SS | BP2248SS | BP2248SSDX | 2348SS |
The Model 9060 Universal Air Knife Mounting System is used to provide secure, precise positioning for any of the EXAIR Air Knives. The Air Knife can quickly and easily be moved within close proximity of the part to improve effectiveness.
Learn MoreEXAIR’s EFC™ is a user-friendly electronic flow control for compressed air that is designed to minimise compressed air use on blowoff, drying, cooling, conveying and static elimination operations. The EFC combines a photoelectric sensor with a timing control that limits compressed air use by turning it off when no part is present. The timing control permits easy tuning to the application requirements while providing flexibility in sensing distance.
Learn MoreWith proper filtration of dirt, moisture and oil from the compressed air supply, EXAIR compressed air products will operate for years with no maintenance required. Use a 5 micron or smaller filter separator on the compressed air supply. To prevent problems associated with oil, use a 0.03 micron or smaller oil removal filter on the compressed air supply. Pressure regulators permit easy selection of the operating pressure, providing infinite control of flow, force and air consumption.
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