Super Air Knife™ – Quiet, hard-hitting curtain of air for blowoff, cleaning, drying and cooling.

 Luftmesser Super Air Knife Air curtain
  • Surprisingly Quiet! – Only 69 dBA!
  • Reduced Air Consumption!
  • Uniform Airflow!
  • Amplification of 40:1!

What is the Super Air Knife?

The Super Air Knife is the latest generation of air knife that dramatically reduces compressed air usage and noise when compared to other blowoffs. The Super Air Knife offers a more efficient way to clean, dry or cool parts, webs or conveyors. It delivers a uniform sheet of laminar airflow across the entire length with hard-hitting force.

Noisy blowoffs become a whisper when replaced with the compact Super Air Knife. Even at high pressures of 80 PSIG (5.5 BAR), the sound level is surprisingly quiet at 69 dBA for most applications! Amplification ratios (entrained air to compressed air) of 40:1 are produced. The Super Air Knife meets OSHA dead-ended pressure and noise requirements.

Specials are available. Please contact us.

Air Knife in Überlängen an einem Stück

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.

Super Air Knife Funktion

Applications

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

Dry

Blowoff

Cool

PVDF (Polyvinylidene Fluoride) Super Air Knife

Super Air Knives in PVDF (Polyvinylidene Fluoride) offers superior strength and are resistant to UV-light, inorganic chemicals, solvents, ozone, weather, fungi, chlorinated hydrocarbons, highly corrosive acids, weak bases and salts. The PVDF Super Air Knife uses PTFE Shims, Type 316 Stainless Steel pipe plugs, and Hastelloy c-276 alloy screws to withstand harsh environments. The PVDF Super Air Knife is suitable for manufacturing processes that involve electroplating, solar cells, lithium ion batteries, transfer of acids and caustic chemicals, brine, solvent recovery, semiconductors, and medical devices. It can withstand temperatures up to 275oF (135oC).

  • Quiet – 69 dBA for most applications
  • Minimal air consumption
  • 40:1 air amplification
  • Uniform airflow across entire length
  • Easy mounting – using Universal Air Knife Mounting System or compressed air inlets on each end and bottom
  • Compact, rugged, easy to install
  • Recessed hardware
  • No moving parts – maintenance free
  • Variable force and flow
  • Stainless steel screws in all models
  • Special lengths available
  • Unlimited system lengths of uninterrupted airflow available
  • Stock lengths to 108 ” (2743mm) in aluminum, 303 stainless steel, and 316 stainless steel (ss – for temperatures up to 800°F (427°C), food processing or corrosive environments), and PVDF up to 54″ (1372mm) for superior corrosion resistance.
Super Air Knife, Modell 110024SS

A Model 110024SS 24″ (610mm) Stainless Steel Super Air Knife dries bolt covers exiting an electro-polishing tank.

Blowoff Comparison

There are a variety of ways to blow the water from the bottles shown in the photo, but which method is best? The following comparison of drilled pipe, flat air nozzles, a blower and the Super Air Knife proves that EXAIR has the best choice for your blowoff, cooling or drying application.

Our goal for each of the blowoff choices was to use the least amount of air possible to get the job done (lowest energy and noise level). Compressed air pressure required for each was 60 PSIG (4.1 BAR) which provided adequate velocity to blow the water off. The table below summarizes the overall performance. Since your actual part may have an odd configuration, holes or sharp edges, we took sound level measurements in free air (no impinging surface).

Compare these Blowoffs

ineffective drilled pipe

Drilled Pipe

This common blowoff is very inexpensive and easy to make. For this test, we used (2) drilled pipes, each with (25) 1/16″ (1.6mm) diameter holes on 1/2″ (13mm) centers. As shown in the test results below, the drilled pipe performed poorly. The initial cost of the drilled pipe is overshadowed by its high energy use. The holes are easily blocked and the noise level is excessive – both of which violate OSHA requirements. Velocity across the entire length was very inconsistent with spikes of air and numerous dead spots.

ineffective flat air nozzles

Flat Air Nozzles

As shown below, this inexpensive air nozzle was the worst performer. It is available in plastic, aluminum and stainless steel from several manufacturers. The flat air nozzle provides some entrainment, but suffers from many of the same problems as the drilled pipe. Operating cost and noise level are both high. Some manufacturers offer flat air nozzles where the holes can be blocked – an OSHA violation. Velocity was inconsistent with spikes of air.

 

ineffective blower

Blower Air Knife

The blower proved to be an expensive, noisy option. As noted below, the purchase price is high. Operating cost was considerably lower than the drilled pipe and flat air nozzle, but was comparable to EXAIR’s Super Air Knife. The large blower with its two 3″ (76mm) diameter hoses requires significant mounting space compared to the others. Noise level was high at 90 dBA. There was no option for cycling it on and off to conserve energy like the other blowoffs. Costly bearing and filter maintenance along with downtime were also negative factors.

exceptional exair super air knife

EXAIR Super Air Knife

The Super Air Knife did an exceptional job of removing the moisture on one pass due to the uniformity of the laminar airflow. The sound level was extremely low. For this application, energy use was slightly higher than the blower but can be less than the blower if cycling on and off is possible. Safe operation is not an issue since the Super Air Knife cannot be dead-ended. Maintenance costs are low since there are no moving parts to wear out.

 

The target for each blow-off device was to consume the least amount of air possible to perform the task (at the lowest energy and noise levels). The required air pressure for each device was 4.1 bar inlet pressure, (60 PSIG), at which an adequate speed was provided to blow the water off. The table below summarizes the general performance. Since the workpiece you are actually about to blow off may have an irregular structure, holes or sharp edges, the noise level measurements were made in free air (without hitting a surface).

Blowoff Comparison Statistics
Type of Blowoff 24″PSIGBARSLPMHorse Power RequiredSound level dBAPurchase Price*Annual Electrical CostApprox. Annual Maint. CostFirst Year Cost
Drilled Pipe604,14.92426,109145 €4.669 €840 €5.509 €
Flat Air Nozzles604,17.27338,03102190 €6.803 €1.320 €8.123 €
Blower Air Knife30,2N/A7,46905.000 €1.334 €1.370 €2.704 €
Super Air Knife604,11.5578,2069559 €1.467 €280 €1.747 €
*Based on national average electricity cost of 8.6 cents per kWh or 3 cents per standard cubic metre. Annual cost reflects 40 hours per week, 52 weeks per year.
Super Air Knife Performance with .002″ (.05mm) thick shim installed, tested with Super Air Knife 110012 (30cm long)

Pressure SupplyAir Consumption per inch (25mm)Velocity @ 6″ (152mm) from targetSound level @ 3′ (914mm)Force per Inch (25mm) @ 6″ (152mm) from target
PSIGBARSLPMM/SdBAGrams
201,43125,45717
402,84835,66131
805,58259,96971
1006,99968,57291

Aluminium Super Air Knife

Special Lengths Available – Contact us.

Aluminium Super Air Knife Dimensions

Stainless Steel Super Air Knife

Special Lengths Available – Contact us.

Edelstahl Super Air Knife Abmessungen

PVDF Super Air Knife

Special Lengths Available – Contact us.

PVDF Super Air Knife Abmessungen

Many lengths available from stock in four materials:

MaterialTemperatures up to
Aluminum82° C
Type 303 Stainless Steel (= WNr. 1.4305)427° C
Type 316 Stainless Steel ( = V4A)427° C
PVDF (Polyvinylidene Flouride)135° C

For further information contact us.

Models

BSP Threads Available – Contact us.

Super Air Knife
Super Air Knife lengthAluminum ModelType 303 Stainless Steel ModelType 316 Stainless Steel ModelPVDF Model
3″ (76mm)110003110003SS110003SS-316110003-PVDF
6″ (152mm)110006110006SS110006SS-316110006-PVDF
9″ (229mm)110009110009SS110009SS-316110009-PVDF
12″ (305mm)110012110012SS110012SS-316110012-PVDF
18″ (457mm)110018110018SS110018SS-316110018-PVDF
24″ (610mm)110024110024SS110024SS-316110024-PVDF
30″ (762mm)110030110030SS110030SS-316110030-PVDF
36″ (914mm)110036110036SS110036SS-316110036-PVDF
42″ (1067mm)110042110042SS110042SS-316110042-PVDF
48″ (1219mm)110048110048SS110048SS-316110048-PVDF
54″ (1372mm)110054110054SS110054SS-316110054-PVDF
60″ (1524mm)110060110060SS110060SS-316——————
72″ (1829mm)110072110072SS110072SS-316——————
84″ (2134mm)110084110084SS110084SS-316——————
96″ (2438mm)110096110096SS110096SS-316——————
108″ (2743mm)11001081100108SS1100108SS-316——————
Accessories
ModelDescription
9060Universal Air Knife Mounting System
9076Air Knife Plumbing Kit for length up to 42″
9077Air Knife Plumbing Kit for length 48″-54″
9078Air Knife Plumbing Kit for length 60″-84″
9079Air Knife Plumbing Kit for length 90″-108″
9240Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 24″ length
9241Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 30″ length
9242Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 36″ length
9243Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 42″ length
9244Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 48″ length
9245Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 54″ length
9246Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 60″ length
9247Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 72″ length
9248Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 84″ length
9249Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 96″ length
9250Plumbing Kits for Stainless Steel and PVDF Super Air Knives for 108″ length
900517Universal Air Knife Mounting System Stainless Steel 303/304
9055EFC (40 SCFM), 1/4″ NPT
9056EFC (100 SCFM), 1/2″ NPT
9057EFC (200 SCFM), 3/4″ NPT
9064EFC (350 SCFM), 1″ NPT
Super Air Knife Shim Sets
Airflow lengthAluminum ModelStainless Steel 303SS ModelStainless Steel 316SS ModelPVDF Model
3″ (76mm)110303110303SS110303SS-316110303-PVDF
6″ (152mm)110306110306SS110306SS-316110306-PVDF
9″ (229mm)110309110309SS110309SS-316110309-PVDF
12″ (305mm)110312110312SS110312SS-316110312-PVDF
18″ (457mm )110318110318SS110318SS-316110318-PVDF
24″ (610mm)110324110324SS110324SS-316110324-PVDF
30″ (762mm)110330110330SS110330SS-316110330-PVDF
36″ (914mm)110336110336SS110336SS-316110336-PVDF
42″ (1067mm)110342110342SS110342SS-316110342-PVDF
48″ (1219mm)110348110348SS110348SS-316110348-PVDF
54″ (1372mm)110354110354SS110354SS-316110354-PVDF
60″ (1524mm)110360110360SS110360SS-316——————
72″ (1829mm)110372110372SS110372SS-316——————
84″ (2134mm)110384110384SS110384SS-316——————
96″ (2438mm)110396110396SS110396SS-316——————
108″ (2743mm)110310811033108SS1103108SS-316——————

Air Knife Mounting System

– Provide precise positioning for your Air Knife! –

The Air Knife Mounting System is used to provide secure, precise positioning for any of the Exair Air Knives. It can be mounted on the top or bottom of most Air Knives (Super Air Knife, Standard Air Knife). The Mounting System has a durable, stainless steel construction that is suitable for a variety of industrial applications.

Universelles Air Knife Befestigunssystem
Universal Air Knife Mounting System is used to provide precise positioning for Air Knife.

Universal Air Knife Mounting System
ModelDescription
9060Universal Air Knife Mounting System
Installation and Maintenance sheet: » Universal Air Knife Mounting System

Air Knife Plumbing Kit

Air Knife Plumbing KitSuper Air Knives that are 24″ (610mm) to 42″ (1067mm) must be supplied with compressed air at multiple inlets on the knife. The Air Knife Plumbing Kits make it easy to ensure proper airflow to each inlet. The provide properly sized compressed air hose or pipe and fittings to interconnect the bottom or end compressed air inlets for best performance. Plumbing Kits for aluminum Super Air Knives include a pressure gauge to monitor pressure at the Super Air Knife, which is an indication of proper air supply.They also include nitrile/PVC hose and brass fittings. Plumbing kits for stainless steel Super Air Knives include cut to length type 316 stainless steel pipe and fittings and will also work on PVDF Super Air Knives.
Air Knife Coupling Bracket Kit

Some applications require a Super Air Knife that is longer than our 108″ (2743mm)length. Coupling Bracket Kits that join two Super Air Knives together are available. The kit includes two rigid plates along with the assembly screws.

Accessories
ModelDescription
110900Aluminum Coupling Bracket Kit
110900SSType 303 Stainless Steel Coupling Bracket Kit
110900SS-316Type 316 Stainless Steel Coupling Bracket Kit
xxxxxContact us for suitable filters and maintenance units
Verlängerung von Air Knives
The Model 110900 Coupling Bracket Kit is used to join two aluminum Super Air Knives.

Shim Sets change the force and flow

The Super Air Knife includes a 0,05mm installed Shim and is for most applications suitable. Some applications need higher force and flow. Force and flow can be increased by installing additonal shims that open the air gap.

Abstandsfolien
Shim-Sets could be buy as accessories:
• 3 Plastic Shims: 0,03 mm + 0,08 mm + 0,10 mm dick (Aluminum Air Knife)
• 3 Stainless Steel Shims: 0,05 mm thick (Stainless Steel Air Knife)
• 3 PTFE-Shims: 0,05 mm thick (PVDF Air Knife)
EXAIR’s EFC is an electronic flow control that dramatically reduces compressed air costs by turning off the compressed air when no part is present. This minimizes compressed air use for blow off, drying, cooling, conveying and static elimination operations. The EFC combines a photoelectric sensor with a timing control that limits compressed air use by turning it off when no part is present. Visit the EFC Page for more information.