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Standard Air Knife

It is a good choice when a less expensive alternative is required.

In industrial applications, air knives offer an efficient way to clean, dry or cool parts, webs or conveyors as well as acting as an environmental separator or air curtain. EXAIR's Air Knives is the most efficient compressed air knife on the market!.

It is engineered to dramatically reduce compressed air usage while entraining ambient air at a ratio of 30:1, compared to 3:1 for drilled or slotted pipe. Noise levels are greatly reduced when compared to other blowoffs. Available from stock 3" (76mm) to 48" (1219mm) long and made from aluminum or 303 stainless steel to meet your application needs. Custom sizes and materials available, please contact us.


  • Has an airflow that is also uniform and forceful.
  • It is louder and uses more compressed air than the Super Air Knife.
  • Compressed air inlets are provided on each end.
  • Overall length is 1" (25mm) longer than the airflow length.

The Standard Air Knife is EXAIR's original Air Knife design. It uses a Coanda profile which turns the airflow 90 degrees from its outlet. This creates a low pressure area capable of entraining ambient air at a ratio of 30:1 while producing a powerful airflow.


  • Up to 10 dBA noise reduction
  • Reduced air consumption
  • 30:1 air amplification
  • Aluminum or stainless steel
  • Compact, rugged, easy to install
  • Stock lengths up to 48" (1219mm)
  • No Moving Parts
  • Compressed air inlets on each end
  • Variable force and flow


  • Part drying after wash
  • Sheet cleaning in strip mills
  • Conveyor cleaning
  • Web drying or cleaning
  • Part or component cooling
  • Environmental separation
  • Pre-paint blowoff
  • Bag opening/filling operations
  • Scrap removal on converting operations


How the Standard Air Knife Works?

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 beings to entrain surrounding air (4), for an amplifiecation ration of 30:1 at 6" (152mm) away.


Standard Air Knife Specifications

The Standard Air Knife is available in ten standard lengths of 3", 6", 9", 12", 18", 24", 30", 36", 42" and 48" (76, 152, 229, 305, 457, 610, 762, 914, 1067 and 1219mm). This measurement refers to the airflow length. The overall length is 1" (25mm) longer. Special lengths up to 48" (1219mm) are available. Any number of Standard Air Knives may be installed across a given area.

Compressed Air Inlets: A Standard Air Knife has compressed air inlets on each end. Lengths 24" (610mm) and longer should be supplied with compressed air at each end to maintain uniform airflow.

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.

Mounting: The Standard Air Knife can also be supported by the compressed air pipe.

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" (0.05mm) 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. Standard Air Knife Kits include a shim set (three additional shims). Shim sets for aluminum Standard Air Knives include a .001" (0.03mm) Amber color  , .003" (0.08mm) Green color  , and .004" (0.10mm) thick Tan  color plastic shims. Shim sets for stainless steel Standard Air Knives include (3) .002" (0.05mm) thick stainless steel shims.


Standard Air Knife Dimensions



High noise levels are a common problem for many plants. Compressed air noise often exceeds OSHA (Occupational Safety and Health Administration) noise level exposure requirements, resulting in hearing loss to those working in close proximity. The sound level of the Super Air Knife is quiet at 69 dBA, even at high pressures of 80 PSIG (5.5 BAR). Using the Super Air Knife, it is possible to obtain hard-hitting force without the high noise.


Here are some sample of applications:

A Model 2012 12" (305mm) Standard Air Knife opens mustard packets prior to fill.


(3) Model 2012 12" (305mm) Standard Air Knives performs 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.

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