EXAIR Standard Air Knife™ Deluxe Kits include a Standard Air Knife, EFC (Electronic Flow Control), Universal Air Knife Mounting System, shim set, filter separator and pressure regulator (with coupler). 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. Available from stock in 3" to 48" lengths and made from aluminum or Type 303 stainless steel. Custom sizes and materials are available.
| Product | Length | Material | Includes Shim Set, Filter Separator, Pressure Regulator | EFC Electronic Flow Control | Plumbing Kit | Air Knife Mounting System | Air Inlet |
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3" (76mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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3" (76mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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6" (152mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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6" (152mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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9" (229mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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9" (229mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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12" (305mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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12" (305mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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18" (457mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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18" (457mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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24" (610mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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24" (610mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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30" (762mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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30" (762mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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36" (914mm) |
Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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36" (914mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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42" (1067mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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42" (1067mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
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48" (1219mm) | Aluminum | Included | Included | N/A | Included | 1/4 NPT |
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48" (1219mm) | Type 303 Stainless Steel | Included | Included | N/A | Included | 1/4 NPT |
Specifications:
Standard Air Knife Performance |
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| 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 |
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12" (305mm) Standard Air Knife tested with .002" (0.05mm) thick shim installed. |
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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).
Models
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
How the Super Air Knife Works
Compressed air flows through an inlet (1) into the plenum chamber of the Super Air Knife. The flow is directed to a precise, slotted orifice. As the primary airflow exits the thin slotted nozzle (2), it follows a flat surface that directs the airflow in a perfectly straight line. This creates a uniform sheet of air across the entire length of the Super Air Knife. Velocity loss is minimized and force is maximized as the room air (3) is entrained into the primary airstream at a ratio of 40:1. The result is a well defined sheet of laminar airflow with hard-hitting force and minimal wind shear.
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.
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