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Exair Standard Air Knife
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Standard
Air Knife™ |
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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 utilizes
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.
 Printable
PDF File
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Model 2012 12" (30cm) Standard
Air Knife opens mustard packets prior to fill.
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- Part drying after
wash
- Sheet cleaning
in strip mills
- Conveyor cleaning
- Part or component
cooling
- Web drying or
cleaning
- Environmental
separation
- Bag opening/fill
operations
- Pre-paint blowoff
- Scrap removal
on converting operations
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- Up to 10 dBA
noise reduction
- Reduced air consumption
- 30:1 air amplification
- Aluminum or stainless
steel
- Compact, rugged,
easy to install
- Stock lengths
to 36" (91cm)
- Unlimited system
lengths
- No moving parts
- Variable force
and flow
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Compressed air flows
through the inlet (1) into a plenum chamber (2). It
is then throttled through a thin nozzle (3) extending the length of
the Standard Air Knife. This primary airstream adheres to the coanda
profile (4), which turns it 90° and directs the flow down the face
of the unit. The primary stream immediately begins to entrain surrounding
air (5), for amplification ratios of 30:1 at 6" (15cm).
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. |
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Kits include an Air Knife, shim set,
filter separator and pressure regulator. |
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-out is normally measured in weeks, not months
or years.
Specifications
The Standard Air Knife is available
in six standard lengths of 6", 12", 18", 24",
30" and 36" (15, 30, 46, 61, 76 and 91cm). Special lengths
up to 36" (91cm) and unlimited system lengths are available.
Any number of Standard Air Knives may be installed across a given
area.
Filtration:
The use of clean air is essential. Kits include an automatic drain
filter with a 5 micron filter element that is sized properly for
flow.
Materials of Construction:
The Standard Air Knife is available in either aluminum or stainless
steel construction.
Regulation:
A pressure regulator on the compressed air supply provides infinite
control of flow, force, and air consumption. Kits include a pressure
regulator that is sized properly for flow.
Shim Sets:
A Standard Air Knife has a .002" (.05mm) gap setting. This
gap is set with a shim positioned between the cap and body of the
Standard Air Knife. Force
and flow through the Standard Air Knife may be easily increased
by adding shims to open the gap. Kits include a shim set (three
additional shims). |
Compare
Blowoffs |
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Type of Blowoff
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Air
Consumption |
Sound
Level |
| Model
# |
Description |
SCFM |
SLPM |
dBA |
| 110018 |
18"
(46cm)
Super Air Knife |
52 |
1329 |
71 |
| 2018 |
18"
(46cm)
Std. Air Knife |
61 |
2234 |
87 |
| N/A |
18"
(46cm)
drilled pipe* |
141 |
3996 |
92 |
| *
drilled pipe has (37) 1/16" (1.59mm) holes on 0.5" (13mm) centers |
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| Standard
Air Knife Performance with .002" (.05mm) thick shim
installed |
Pressure
Supply |
Air
Consumption
per Inch |
Velocity
@ 6"
from target |
Sound
level
@ 3' |
Force
per Inch
@ 6" from target |
| PSIG |
Bar |
SCFM |
SLPM |
FPM |
M/S |
dBA |
Ounces |
Grams |
| 20 |
1.4 |
1.3 |
37 |
4000 |
20.3 |
69 |
0.45 |
13 |
| 40 |
2.8 |
2.0 |
57 |
5800 |
29.5 |
78 |
1.1 |
31 |
| 60 |
4.1 |
2.7 |
76 |
8500 |
43.2 |
84 |
2.0 |
57 |
| 80 |
5.5 |
3.4 |
96 |
11,000 |
55.9 |
87 |
2.7 |
77 |
| 100 |
6.9 |
4.1 |
116 |
13,000 |
66 |
90 |
3.3 |
94 |
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| Front View |
Side
View (Aluminum) |
Side View (Stainless Steel) |
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| Code
| Name | Price |
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EX2006 | Exair 2006 6" (15cm) Air Knife |
$132.00 |
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EX2006SS | Exair 2006SS 6" (15cm) Stainless Steel Air Knife |
$227.00 |
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EX2012 | Exair 2012 12" (30cm) Air Knife |
$167.00 |
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EX2012SS | Exair 2012SS 12" (30cm) Stainless Steel Air Knife |
$340.00 |
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EX2018 | Exair 2018 18" (46cm) Air Knife |
$215.00 |
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EX2018SS | Exair 2018SS 18" (46cm) Stainless Steel Air Knife |
$475.00 |
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EX2024 | Exair 2024 24" (61cm) Air Knife |
$255.00 |
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EX2024SS | Exair 2024SS 24" (61cm) Stainless Steel Air Knife |
$539.00 |
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EX2030 | Exair 2030 30" (76cm) Air Knife |
$315.00 |
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EX2030SS | Exair 2030SS 30" (76cm) Stainless Steel Air Knife |
$705.00 |
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EX2036 | Exair 2036 36" (91cm) Air Knife |
$362.00 |
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EX2036SS | Exair 2036SS 36" (91cm) Stainless Steel Air Knife |
$815.00 |
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EX2206 | Exair 2206 6" (15cm) Air Knife with Filter and Regulator |
$270.00 |
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EX2206SS | Exair 2206SS 6" (15cm) Stainless Steel Air Knife with Filter and Regulator |
$380.00 |
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EX2212 | Exair 2212 12" (30cm) Air Knife with Filter and Regulator |
$319.00 |
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EX2212SS | Exair 2212SS 12" (30cm) Stainless Steel Air Knife with Filter and Regulator |
$530.00 |
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EX2218 | Exair 2218 18" (46cm) Air Knife with Filter and Regulator |
$385.00 |
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EX2218SS | Exair 2218SS 18" (46cm) Stainless Steel Air Knife with Filter and Regulator |
$658.00 |
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EX2224 | Exair 2224 24" (61cm) Air Knife with Filter and Regulator |
$465.00 |
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EX2224SS | Exair 2224SS 24" (61cm)Stainless Steel Air Knife with Filter and Regulator |
$770.00 |
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