Regular Air Knife

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The Regular Air Knife performs at a 30:1 air amplification ratio that is less efficient that the Advanced Air Knife. Air consumption is ~3.4 SCFM per inch at 80 PSIG. (Made from aluminum or stainless steel metals.)

Price
$91.80
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REGULAR AIR KNIFE: Informations

What is an Air Knife System?
Air Knife Systems utilize compressed air for industrial applications. The curtain like airflow of the Air Knife (air curtain) is used to: dry, clean, remove excess oils, liquids and dust from your application. The Air Knife may also be used for: printing and labeling, part or component cooling, converting and packaging, films and laminating, form and fill, sheet and web materials, bag opening/fill operations, conveying, food processing and paint preparation.

Advanced Air Knife Comparison
Temperature Rating Corrosion Rating
Aluminum Regular Air Knife 275°F (135°C) Good
Stainless Steel (Type 303) Regular Air Knife 400°F (204°C) Excellent
*Stainless Steel (Type 316) Regular Air Knife 800°F (427°C) Excellent
*Available upon special request

The Regular Air Knife provides good performance with a 30:1 air amplification ratio that is less efficient than the Advanced Air Knife. Air consumption is ~3.4 SCFM per inch at 80 PSIG. The Regular Air Knife is a good choice when a less expensive alternative is required. It has slightly higher noise levels and uses more compressed air than the Advanced Air Knife.

REGULAR AIR KNIFE: Specifications

The Regular Air Knife is available in twelve standard IN-STOCK lengths of (76 mm), 6″ (152 mm), 8″ (203 mm), 9″ (229 mm), 12″ (305 mm), 18″ (457 mm), 24″ (610 mm), 30″ (762 mm), 36″ (914 mm), 42″ (1067 mm), 48″ (1219 mm), and 54″ (1372 mm).

Materials of Construction:
AIR KNIFE – The Regular Air Knife is available in both Aluminum and Stainless Steel.
SHIMS – Stainless Steel

Mounting:
There are multiple 1/4-20 mounting holes located on the rear for easy mounting without the need to dismantle the air knife. Ridged compressed air pipe can also support your air knife!

Shims:
All STREAMTEK Air Knives come with a standard machined .002″ Stainless Steel shim which will work for most applications. If a greater force is required, an additional .002″ shim can be added to open the outlet gap for greater flow.

Compressed Air Inlet(s):
The Regular Air Knife incorporates air inlet(s) at each end* and on the back to allow for flexible air use, air inlet choice and high flow to higher force jets.
* Not included in 3″ (76 mm) models.

Air Supply Filtration
A clean dry source of compressed air is vital! The ‘Standard Kit’ includes an auto drain filter /w 5 micron filter which is properly sized to avoid airflow restriction.

Regular Air Knife Performance
Pressure Supply Air Consumption
Per Inch (25mm)
Velocity @
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 1.5 42 4,000 20 64 0.5 14
40 2.8 2.1 60 5,800 30 73 1.2 34
60 4.1 2.7 77 8,500 43 80 2.0 57
80 5.5 3.5 99 11,000 56 83 2.8 79
100 6.4 4.1 16 13,000 66 86 3.3 94

with .002″ (.05mm) thick shim installed. 12″ (305mm) Regular Air Knife tested.

Drilled Pipe Air Consumption: Chart
*Compressed Air Flow Trough A Hole in Standard Cubic Feet Per Minute (SCFM)
  1/16" (1.59mm) Diameter Hole 3/32" (2.38mm) Diameter Hole 1/8" (3.18mm)
Diameter Hole
3/16" (4.76mm) Diameter Hole 1/4" (6.35mm) Diameter Hole
PRESSURE SUPPLY SCFM SLPM SCFM SLPM SCFM SLPM SCFM SLPM SCFM SLPM
20 PSIG (1.4 Bar) 1.5 42.4 3.4 96.2 6.3 178.3 14.7 416.0 26.0 735.8
40 PSIG (2.8 Bar) 2.1 65.0 5.5 155.7 10.1 285.8 23.0 650.9 40.0 1132.0
60 PSIG (4.1 Bar) 3.1 87.7 7.5 212.3 14.2 401.9 31.0 877.3 54.0 1528.2
80 PSIG (5.5 Bar) 3.9 110.4 9.4 266.0 17.5 495.3 40.0 1132 70.0 1981.0
100 PSIG (6.4 Bar) 4.6 130.2 11.7 331.1 21.7 614.1 47.5 1344.3 83.0 2348.9
120 PSIG (8.4 Bar) 5.4 152.8 13.9 393.4 25.9 733.0 56.3 1593.3 96.0 2716.8

The drilled pipe is a relatively inexpensive and easy product to use. As shown in the test above, the drilled pipe performs poorly. Due to its high compressed air use, the initial cost of the drilled pipe is quickly over taken. In addition, OSHA requirements are violated as the noise levels are excessive and holes can easily become blocked. Due to the nature of drilled pipe, air flow across the entire length is not uniform; resulting in many dead spots and spikes of air.

REGULAR AIR KNIFE: FAQs

Below is a list of Frequently Asked Questions relating to our Regular Air Knife. If you need additional help with your application and/or can’t find an answer to your question, please call our factory at 1-705-770-4455 or email an Application Engineer at support@stream-tek.com.

1. Will the Air Knife operate with a blower?
No. The Air Knife is designed to use only compressed air. Blowers are very noisy, large, and expensive with 3″ to 6″ connections. They simply will not produce enough force to operate our Air Knife.

2. Can I cut the Air Knife to a custom length?
No. The Air Knife is precision machined. Cutting it would expose the internal design with no way to reseal the air knife. With that said, custom sizes can be machined upon special request.

3. Can I connect the cold end of a Vortex Tubes to an Air Knife
No. This would cause an airflow restriction which would instantly produce back-pressure in excess of 5 PSIG! When this back-pressure is exceeded, performance of the Vortex Tube will be negatively impacted. The hot end of the Vortex Tube on the other hand can withstand a pressure up to 30 PSIG (depending on the cold fraction).

4. What is the recommended pressure that should be used with the Air Knife?
Always try to use the lowest pressure that is possible for your application. Always use a pressure regulator to increase force/airflow to the point where your application problem is rectified. The maximum pressure of the Air Knife is 250 PSIG.

5. How do I mount the Air Knife?
The rigid compressed air pipe is the best way to mount the regular air knife (air curtain). If this is not possible, there are multiple 1/4-20 mounting holes located on the back of the Air Knife.

6. Can you make Regular Air Knives over 54″ or other lengths you do not stock?
Yes. We have the capabilities to manufacture up to 109″ long Air Knives. In addition, any length air knife can be machined upon special request. Lead time for custom orders is typically 2-3 weeks.

7. What temperatures can your Air Knives withstand?
Aluminum Air Knife:
275°F (135°C)

Stainless Steel (Type 303) Air Knife:
400°F (204°C)

Stainless Steel (Type 316) Air Knife:
800°F (427°C)

* Temperatures that exceed 800ºF (427ºC) could produce inter-granular corrosion which could eventually plug the air gap opening.

8. There isn’t enough airflow coming out of my air knife! Do I need more shims?
Before you increase the standard gap opening of .002″, it’s important to ensure your Air Knife is working properly. The low flow can be caused by a clogged filter, undersize lines, undersized air compressor, restrictive fittings or even particles clogging up the gap between the air knife body and cap.

To verify that full line pressure is available, install a pipe-tee along with a pressure gauge at any one of the inlets of the air knife. If full line pressure is present and additional flow is needed, turn off the compressed air supply and disassemble your air knife. Be sure to clean the air knife body, cap and shim before reassembling with the additional shim. Tighten each screw to 7.5 ft/lbs.

9. My Air knife has dead spots. What can I do?
Each and every air knife that leaves our facility is tested to ensure proper flow characteristics. We suggest that you examine the below (3) three possibilities that may cause these dead spots.

i) Inspect the air knife for direct contamination and/or clogging. Cleaning instructions are found in the Installation and Maintenance sheet supplied with your air knife.
ii) Screws may have been over tightened during reassembly or mounting. Screws should be tightened to 7.5 ft/lbs.
iii) Air knife may be undersupplied. Do not use undersized lines, filters or restrictive fittings that may not allow enough airflow into the plenum chamber of the air knife.

10. How can I get more force out of my air knife?
A higher force of air flow can be achieved by increasing the volume of air that’s being throttled through the air knife. There are (2) two ways to do this:

i) Increase the supply pressure. Maximum safe level is 250 PSIG!
ii) Install additional shim(s).

** Both of the above will have a direct effect on the volume of compressed air that is required to supply your air knife. Therefore proper plumbing modifications should be taken into consideration.

11. Which way does the airflow form your air knife need to be pointed?
The STREAMTEK Air Knife is not position sensitive. It is effective when pointed in any direction.

REGULAR AIR KNIFE: How it Works

(A) Compressed air flows through the inlet at the rear (or end) ports, and into a plenum chamber.

(B) As the compressed air stream leaves the Air Knife, the surrounding air is entrained into the airflow for an amplification ratio of 30:1 @ 6″ away and adheres to the coanda profile.

(C) The airflow now turns 90 and travels down the front face of the Air Knife. The amplified air stream is a hard-hitting sheet of laminar flow with minimal wind shear, which translated into reduced energy use in blow-off and cooling.

REGULAR AIR KNIFE: Applications

STREAMTEK products use innovative compressed air technologies to improve productivity, increase equipment efficiency, deliver enclosure, spot cooling, conveying, and blow-off. If you don’t find a solution and/or idea for your application, or if you want additional details, call our factory at 1-705-770-4455 or email an Application Engineer at support@stream-tek.com.

Applications

Industrial Blow off:

  • Clean circuit board holes, Flat Sheet Rubber and Plastic; Moulds.
  • Blow off liquid, chemicals, dirt, chips, and/or water prior to labeling or packaging.
  • Remove water, coolant, dust, and scrap in parts manufacturing and assembly operations.
  • Paper dust removal and control.
  • Drying Systems:

  • Bottles and Cans, Castings, Sheet Metal, and Dip Tank Solution Stripping.
  • Extrusions, Wire, Produce, Wood Preservative, Drive-Thru Car Wash, Paint, Coatings, and Cloth.
  • Systems for Cooling:

  • Extrusion Cooling, Food Processing, and Dimensional Stability Control.
  • Cool metal parts prior to coating and/or painting.
  • Replace general manufacturing fans
  • Cooling to set some inks
  • Advantages

  • Quiet (69 dBA for most applications)
  • Minimal air consumption (40:1 Air Amplification)
  • Variable force and flow
  • No moving parts – maintenance free
  • Easy mounting – compressed air inlets on each end and bottom
  • Compact, rugged, easy to install
  • 316 stainless steel available on special order
  • Special lengths available
  • Unlimited system lengths of uninterrupted airflow available
  • REGULAR AIR KNIFE: Dimensions

    Mounting is quick n’ easy! Many Air Knife designs require dismantling and are difficult to mount, often making mounting difficult and affecting airflow.

    Flexibility air inlet(s). All STREAMTEK Air Knives incorporate compressed air inlets at each end and on the back for flexible choice of air input.

    Full-Flow Air Knife. The term Full-Flow means that our Air Knives can be connected end-to-end for a continuous airflow with no gaps.

    Lowest Price in the industry! Find a competitors equivalent Air Knife for less? Contact our factory and we will beat it by 20%; it’s our standard policy.

    SIDE VIEW
    TOP VIEW

    REAR VIEW

    DIMENSIONS: Regular Air Knife
    A B C D E F # of rear inlets
    1/4″ NPT
    3″ (76 mm) 0.7″
    (18 mm)
    2.3″
    (58 mm)
    3″
    (76 mm)
    0.32″
    (8 mm)
    1
    6″ (152 mm) 1.3″
    (33 mm)
    4.6″
    (117 mm)
    6″
    (152 mm)
    0.32″
    (8 mm)
    1
    8″ (203 mm) 1.3″
    (33 mm)
    6.7″
    (170 mm)
    8″
    (203 mm)
    0.32″
    (8 mm)
    1
    9″ (229 mm) 1.3″
    (33 mm)
    7.3″
    (185 mm)
    9″
    (229 mm)
    0.32″
    (8 mm)
    1
    12″ (305 mm) 1.3″
    (33 mm)
    3.3″
    (84 mm)
    8.7″
    (221 mm)
    10.7″
    (272 mm)
    12″
    (305 mm)
    0.32″
    (8 mm)
    1
    18″ (457 mm) 1.4″
    (36 mm)
    5.9″
    (150 mm)
    12.1″
    (307 mm)
    16.6″
    (422 mm)
    18″
    (457 mm)
    0.32″
    (8 mm)
    2
    24″ (610 mm) 1.4″
    (36 mm)
    9.1″
    (150 mm)
    14.9″
    (378 mm)
    22.6″
    (574 mm)
    24″
    (610 mm)
    0.32″
    (8 mm)
    2
    30″ (762 mm) 1.5″
    (38 mm)
    9.1″
    (150 mm)
    20.9″
    (531 mm)
    28.5″
    (724 mm)
    30″
    (762 mm)
    0.32″
    (8 mm)
    2
    36″ (914 mm) 1.5″
    (38 mm)
    9.1″
    (150 mm)
    26.9″
    (683 mm)
    34.5″
    (876 mm)
    36″
    (914 mm)
    0.32″
    (8 mm)
    2
    42″ (1067 mm) 1.5″
    (38 mm)
    9.1″
    (150 mm)
    32.9″
    (836 mm)
    40.5″
    (1029 mm)
    42″
    (1067 mm)
    0.32″
    (8 mm)
    2
    48″ (1219 mm) 1.5″
    (38 mm)
    9.1″
    (150 mm)
    38.9″
    (988 mm)
    46.5″
    (1181 mm)
    48″
    (1219 mm)
    0.32″
    (8 mm)
    3
    54″ (1372 mm) 1.5″
    (38 mm)
    9.1″
    (150 mm)
    44.9″
    (1140 mm)
    52.5″
    (1334 mm)
    54″
    (1372 mm)
    0.32″
    (8 mm)
    3