Model 2618 18" Alum. Full-Flow Air Knife

The Full-Flow Air Knife borrows engineering elements from our original Standard Air Knife with the added benefit of an airflow

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The Full-Flow Air Knife borrows engineering elements from our original Standard Air Knife with the added benefit of an airflow across its entire length, but will have higher operating costs than the Super Air Knife. They also provide the smallest footprint of our Air Knife line to fit in cramped machine spaces. These are a low cost choice and are available from stock in 3" to 36" lengths. The Full-Flow Air Knife is available in aluminum or Type 303 stainless steel. Custom sizes and materials are also available.


  • 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


  • 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


Aluminum - The aluminum Full-Flow Air Knife is suited to a wide variety of environments where corrosion or contamination is not a factor. The aircraft grade aluminum construction with plastic shim is very durable for general purpose applications. Stainless steel screws are used to eliminate corrosion in damp locations. It can withstand temperatures up to 180°F (82°C).

Type 303 Stainless Steel - This is the most common grade of stainless steel. It offers good strength and is best suited to mildly corrosive environments. It can withstand temperatures up to 800°F (427°C).

EXAIR Super Air Knives

The Super Air Knife provides the best performance with a 40:1 air amplification ratio, making it the most efficient. It is the best choice for all applications. The Super Air Knife has a laminar airstream that is uniform, forceful and quiet. Velocity is the highest of all three air knives. Air consumption is lowest of all three air knives. Compressed air inlets are provided on each end and on the bottom. Multiple Super Air Knives can be mounted “end to end” for longer lengths of uninterrupted airflow.

EXAIR Standard Air Knives

The Standard Air Knife provides good performance with a 30:1 air amplification ratio that is less efficient than the Super Air Knife. It is a good choice when a less expensive alternative is required. The Standard Air Knife 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.

EXAIR Full Flow Air Knives

The Full-Flow Air Knife provides good performance with a 30:1 air amplification ratio. The Full-Flow Air Knife is the least expensive and is a good choice for tight spaces. Force is less than the other two styles. Air consumption and sound level falls between that of the Super Air Knife and the Standard Air Knife. Compressed air inlet(s) are provided on the rear. Inlets are available on each end at a small additional charge, however they are not recommended for applications where uniform flow across the length is required.

If you have special requirements, please contact an Application Engineer to discuss it.

Universal Air Knife Mounting System

Universal Air Knife Mounting System - 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. It can be mounted on either the top or bottom of most Air Knives (Super Air Knife, Standard Air Knife and Full-Flow Air Knife). The Universal Air Knife Mounting System has a durable, stainless steel construction that is suitable for a variety of industrial applications.

The Universal Air Knife Mounting System can be articulated into any position and provides a maximum extension of 30" (762mm). A 1/2" diameter hole is required for mounting. Alternatively, the bolt can be threaded directly into a 1/2"-13 tapped hole. For any style Air Knife that is 24" (610mm) to 54" (1372mm), use (2) Universal Air Knife Mounting Systems. For knives 55" (1397mm) - 71" (1803mm), use (3). For 72" (1829mm) - 95" (2413mm), use (4). For knives 96" (2438mm) and over, use (5).

Air Knife Plumbing Kit

Air Knife Plumbing Kit - Full-Flow Air Knives that are 24" or longer must be supplied with compressed air at multiple inlets on the knife. The Air Knife Plumbing Kits prevent you from searching for the right fittings or using undersized air supply lines. They provide properly sized compressed air hose and fittings to interconnect the rear or end compressed air inlets for best performance. Plumbing kits for Full-Flow Air Knives include a pressure gauge to monitor pressure at the Full-Flow Air Knife, which is an indication of proper air supply. They also include nitrile/PVC hose and brass fittings.

Air Knife Coupling Brackets

Coupling Bracket Kits - Some applications require a Full-Flow Air Knife that is longer than our 36" (914mm) length. Coupling Bracket Kits that join two Full-Flow Air Knives together are available. The kit includes two rigid plates along with the assembly screws. All models include stainless steel screws.

Air Knife Shim Sets

Air Knife Shim Sets - Compressed air exhausts through a gap in the Air Knife which is set with a shim. Force and flow may be increased by adding shims.

Shim sets for aluminum Full-Flow Air Knives include a .001" (0.03mm) Amber color, .003" (0.08mm) Green color, and .004" (0.10mm) thick Tan color plastic shim . A Red color .002" (0.05mm) thick shim comes installed in the Full-Flow Air Knife. Shim sets for stainless steel Full-Flow Air Knives includes (1) .002" (0.05mm) thick stainless steel shim.

Full-Flow Air Knives are available in three different model types:

  • Full-Flow Air Knife Only
  • Full-Flow Air Knife Kit - includes a Full-Flow Air Knife, shim set, filter separator and pressure regulator (with coupler).
  • Deluxe Full-Flow Air Knife Kits - includes a Full-Flow Air Knife, EFC, universal mounting system, shim set, filter separator and pressure regulator (with coupler).

Airflow Length

Full-Flow Air Knife only

Full-Flow Air Knife Kit

Deluxe Full-Flow Air Knife Kit

3" (76mm) 2603 and 2603SS 2803 and 2803SS 2803DX and 2803SSDX
6" (152mm) 2606 and 2606SS 2806 and 2806SS 2806DX and 2806SSDX
9" (229mm) 2609 and 2609SS 2809 and 2809SS 2809DX and 2809SSDX
12" (305mm) 2612 and 2612SS 2812 and 2812SS 2812DX and 2812SSDX
18" (457mm) 2618 and 2618SS 2818 and 2818SS 2818DX and 2818SSDX
24" (610mm) 2624 and 2624SS 2824 and 2824SS 2824DX and 2824SSDX
30" (762mm) 2630 and 2630SS 2830 and 2830SS 2830DX and 2830SSDX
36" (914mm) 2636 and 2630SS 2836 and 2836SS 2836DX and 2836SSDX

Full-Flow 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
20 1.4 1.1 31 3,000 15.2 64 0.4 11
40 2.8 1.8 51 5,000 25.4 72 1.0 28
60 4.1 2.4 68 7,500 38.1 76 1.6 45
80 5.5 3.1 88 10,000 50.8 80 2.3 65
100 6.9 3.8 108 12,000 61.0 83 2.9 82

12" (305mm) Full-Flow Air Knife tested with .002" (0.05mm) thick shim installed.

How the Full-Flow Air Knife Works

How the Full-Flow 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 Full-Flow 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 6" (152mm) away.

Full-Flow Air Knife Dimensions and Airflow

EXAIR Aluminum Full-Flow Air Knife Dimensions
Aluminum Full-Flow Air Knife
EXAIR Stainless Steel Full-Flow Air Knife Dimensions
Type 303 Stainless Steel Full-Flow Air Knife

Full-Flow Air Knife and Certifications

CE Compliant OSHA Safe!

EXAIR Full-Flow Air Knives comply with OSHA's Safety Requirements, the EU General Product Safety Directive (2001/95/EC) and meet the noise limitation requirements of the EU Machinery Directive (2006/42/EC). All sound level measurements are taken at 3 feet away.

Conflict Mineral Free

Look for this symbol to designate conflict mineral free products throughout our website. EXAIR supports Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act and we are committed to compliance with the conflict minerals rule in order to curb the illicit trade of tin, tantalum, tungsten and gold in the DRC region. EXAIR is using the CMRT 3.02 template to document our supply chain and commitment to conflict free products.

Caution WARNING! Cancer and Reproductive Harm -

Efficiency Lab

Does your company currently use a blowoff product similar to EXAIR’s that you’d like us to evaluate? Ship it to the EXAIR Efficiency Lab! Our qualified staff will test it for FREE, using EXAIR’s calibrated testing equipment. We’ll compare the performance of your existing product (air consumption, effectiveness, noise levels, efficiencies, etc) with the EXAIR Intelligent Compressed Air® products. The results will be published in a comprehensive report that includes a cost savings analysis. For most applications, EXAIR products can help you improve your efficiency AND typically pay for themselves in a matter of weeks.

To participate in our Efficiency Lab testing, please complete this Product Efficiency Survey to give us the details about your current application and blowoff set up. You can also feel free to contact an Application Engineer for more information at (800) 903-9247 or (513) 671-3322.

After completing the form, your product can be shipped to: Efficiency Lab, EXAIR, 11510 Goldcoast Dr., Cincinnati, OH 45249-1621

This offer is available to all customers in the U.S. and Canada only. Some restrictions might apply.

Products must be shipped to EXAIR freight prepaid. EXAIR will pay the return shipping via UPS ground.

If you cannot send in your product, fill out this Product Efficiency Survey to give us the details about your current application and we will estimate the savings for you.

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 Full-Flow Air Knife is quiet at 80 dBA, even at high pressures of 80 PSIG (5.5 BAR). Using the Full-Flow Air Knife, it is possible to obtain hard-hitting force without the high noise.

OSHA Maximum Allowable Noise Exposure

Hours per day (constant noise) 8 7 4 3 2 1 0.5
Sound level dBA 90 91 95 97 100 105 110
OSHA Standard 29 CFR - 1910.95(a)

If you have questions about a product or you need help in determining the best model for your application, fill out our Application Assistance Worksheet! When you submit this information, one of our knowledgeable Application Engineers will respond with a recommendation for the EXAIR product best suited for the application.

If you would rather fax the form, you can download the Application Assistance Worksheet PDF, print the completed .pdf file, and fax it to us at (513) 671-3363.

For immediate help, call our Application Engineering Department at 1 800-903-9247.

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Material Aluminum
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