Model 2218DX 18" Deluxe Alum. Standard Air Knife Kit
Applications
- 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
Advantages
- 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
Materials
Aluminum - The aluminum Standard 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).
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.
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.
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.
Standard Air Knives are available in three different model types:
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Airflow Length |
Standard Air Knife only |
Standard Air Knife Kit |
Deluxe Standard Air Knife Kit |
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| 3" (76mm) | 2003 | 2203 | 2203DX | |
| 6" (152mm) | 2006 | 2206 | 2206DX | |
| 9" (229mm) | 2009 | 2209 | 2209DX | |
| 12" (305mm) | 2012 | 2212 | 2212DX | |
| 18" (457mm) | 2018 | 2218 | 2218DX | |
| 24" (610mm) | 2024 | 2224 | 2224DX | |
| 30" (762mm) | 2030 | 2230 | 2230DX | |
| 36" (914mm) | 2036 | 2236 | 2236DX | |
| 42" (1127mm) | 2042 | 2242 | 2242DX | |
| 48" (1219mm) | 2048 | 2248 | 2248DX | |
Standard 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 | 1.3 | 37 | 4,000 | 20.3 | 65 | 0.45 | 13 |
| 40 | 2.8 | 2.0 | 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 |
12" (305mm) Standard Air Knife tested with .002" (0.05mm) thick shim installed. | ||||||||
How the Standard Air Knife Works |
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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 6" (152mm) away. |
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Standard Air Knife Dimensions and Airflow |
Aluminum Standard Air Knife
Type 303 Stainless Steel Standard Air Knife
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Standard Air Knife Standards and Certifications
EXAIR Standard 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.
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.
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 Standard Air Knife is quiet at 80 dBA, even at high pressures of 80 PSIG (5.5 BAR). Using the Standard Air Knife, it is possible to obtain hard-hitting force without the high noise.
OSHA Maximum Allowable Noise Exposure |
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| 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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Model 2218DX 18" Deluxe Alum. Standard Air Knife Kit
| Material | Aluminum |
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