Blow-off air knife 2024

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Description
The Standard Air Knife™ is EXAIR's original air knife design featuring a Coanda profile that turns the airstream 90° from the outlet. This creates a low-pressure region that entrains ambient air at a ratio of 30:1, producing a powerful, uniform airflow. Stock lengths range from 3" (76 mm) to 48" (1219 mm). Available in aluminum or Type 303 stainless steel; custom sizes and materials available on request.

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 compared to alternative designs
• Reduced compressed air consumption versus less efficient methods
• 30:1 air amplification for increased effective flow
• Available in aluminum or Type 303 stainless steel
• Compact, rugged construction and easy installation
• Stock lengths up to 48" (1219 mm)
• No moving parts
• Compressed air inlets on each end for flexible installation
• Variable force and flow via shim selection

Materials

• Aluminum — Aircraft-grade aluminum body with plastic shim; suited to environments where corrosion/contamination is not a factor. Stainless steel screws are used for improved corrosion resistance in damp locations. Temperature rating up to 180°F (82°C).
• Type 303 Stainless Steel — Common stainless grade providing good strength for mildly corrosive environments. Temperature rating up to 800°F (427°C).

Models (comparative)

• Super Air Knife — Highest performance: 40:1 air amplification, laminar airstream, highest velocity and lowest air consumption.
• Standard Air Knife — Good performance with 30:1 air amplification; uniform, forceful airflow; lower cost than Super Air Knife but louder and higher air use.
• Full-Flow Air Knife — Economical option with 30:1 amplification; suited for tight spaces; lower force than other styles, with intermediate air consumption and sound level.

Accessories

• Universal Air Knife Mounting System (Model 9060) — Stainless steel mounting system for secure, adjustable positioning; articulates to any position; maximum extension 30" (762 mm). Use multiple mounts depending on air knife length.
• Air Knife Shim Sets — Shims set the exhaust gap and adjust force/flow. Aluminum shim set: .001" (0.03 mm) amber, .003" (0.08 mm) green, .004" (0.10 mm) tan; a .002" (0.05 mm) red shim is installed as standard. Stainless steel shim sets (three .002" (0.05 mm)) available for stainless models.

Systems (standard SKUs by airflow length)

• 3" (76 mm) — Standard Air Knife only: 2003 | Standard Air Knife Kit: 2203 | Deluxe Kit: 2203DX
• 6" (152 mm) — 2006 | 2206 | 2206DX
• 9" (229 mm) — 2009 | 2209 | 2209DX
• 12" (305 mm) — 2012 | 2212 | 2212DX
• 18" (457 mm) — 2018 | 2218 | 2218DX
• 24" (610 mm) — 2024 | 2224 | 2224DX
• 30" (762 mm) — 2030 | 2230 | 2230DX
• 36" (914 mm) — 2036 | 2236 | 2236DX
• 42" (1127 mm) — 2042 | 2242 | 2242DX
• 48" (1219 mm) — 2048 | 2248 | 2248DX

Specifications / Technical data

• Air amplification ratio: 30:1 (measured at 6" / 152 mm from target)
• Available stock lengths: 3" to 48" (76 mm to 1219 mm)
• Materials: Aluminum (aircraft grade) or Type 303 Stainless Steel
• Operating temperature: Aluminum up to 180°F (82°C); Type 303 Stainless Steel up to 800°F (427°C)
• No moving parts; compressed air inlets on each end
• Shim-adjustable exhaust gap for variable force and flow
• Typical performance (12" Standard Air Knife with .002" (0.05 mm) shim):
• At 20 PSIG (1.4 BAR) — Air consumption per inch: 1.3 SCFM (37 SLPM); Velocity @ 6" from target: 4,000 FPM (20.3 m/s); Sound level @ 3' (914 mm): 65 dBA; Force per inch @ 6": 0.45 oz (13 g)
• At 40 PSIG (2.8 BAR) — Air consumption per inch: 2.0 SCFM (57 SLPM); Velocity: 5,800 FPM (29.5 m/s); Sound level: 74 dBA; Force per inch: 1.1 oz (31 g)
• At 60 PSIG (4.1 BAR) — Air consumption per inch: 2.7 SCFM (76 SLPM); Velocity: 8,500 FPM (43.2 m/s); Sound level: 80 dBA; Force per inch: 2.0 oz (57 g)
• At 80 PSIG (5.5 BAR) — Air consumption per inch: 3.4 SCFM (96 SLPM); Velocity: 11,000 FPM (55.9 m/s); Sound level: 83 dBA; Force per inch: 2.7 oz (77 g)
• At 100 PSIG (6.9 BAR) — Air consumption per inch: 4.1 SCFM (116 SLPM); Velocity: 13,000 FPM (66.0 m/s); Sound level: 86 dBA; Force per inch: 3.3 oz (94 g)
• Installed / included options (configurable): shim set, filter separator, pressure regulator with coupler; Deluxe kits may include EFC electronic flow control and universal mounting system.
• Model / SKU shown on page: P2003 (product/item identifier for configuration)