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Bộ khuếch đại - Air Amplifiers

Air Amplifiers


What are Air Amplifiers?

A simple, low cost way to move air, smoke, fumes, and light materials. Air Amplifiers utilize the Coanda effect, a basic principle of fluidics, to create air motion in their surroundings. Using a  small amount of compressed air as their power source, Air Amplifiers pull in large volumes of surrounding air to produce high volume, high velocity outlet flows. Quiet, efficient Air Amplifiers will create output flows up to 25 times their consumption rate.

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A series of Adjustable Air Amplifiers dry and cool a large machined casting as it exits a high temperature wash.

Air Amplifiers have no moving parts, assuring maintenance-free operation. No electricity is required. Flow, vacuum and velocity are easy to control. Outlet flows are easily increased by opening the air gap. Supply air pressure can be regulated to decrease outlet flow. Both the vacuum and discharge ends of the Air Amplifier can be ducted, making them ideal for drawing fresh air from another location, or moving smoke and fumes away. Cycle time is dramatically reduced when aluminum castings are cooled with the high volume airflow of two Air Amplifiers.

  • Vent welding smoke
  • Cool hot parts
  • Dry wet parts
  • Clean machined parts
  • Distribute heat in molds/ovens
  • Ventilate confined areas  
  • Exhaust tank fumes

Two styles are available:

aamp engine
A series of Model 6042 2" (51mm) Adjustable Air Amplifiers blows coolant off 16 cylinder diesel engines.
Super Air Amplifiers™ use EXAIR patented technology that boosts the amount of airflow through the air amplifier. Additional free air (room air) is pulled through the unit while delivering a more balanced flow, making the Super Air Amplifier 3 times quieter than other air amplifiers. Force and flow can be adjusted using shims. Five sizes in aluminum are available.  f46cbf6f7ca44b3da88164f1b09003a0sal aampapp2
A Model 120024 4" (102mm) 
Super Air Amplifier cools an engine 
during dynamometer testing.
Adjustable Air Amplifiers™ have good amplification ratios and are available in many sizes. They are infinitely adjustable by turning the exhaust end to open or close the air gap (no shims are required). This permits easy adjustment where the individual can choose the exact amount of airflow necessary for the application. In addition to aluminum construction, stainless steel models are available that are ideal for high temperature, corrosion and food applications. 50772c25891940a891940c10d188cda7aal aampapp3
Adjustable Air Amplifiers are 
ducted to draw clean air for drying

How They Work

 0cb5dece490449769a07bd211c186c9bsuper af

Compressed air flows through the inlet (1) into an annular chamber (2). It is then throttled through a small ring nozzle (3) at high velocity. This primary airstream adheres to the Coanda profile (4), which directs it toward the outlet. A low pressure area is created at the center (5) inducing a high volume flow of surrounding air into the primary airstream. The combined flow of primary and surrounding air exhausts from the Air Amplifier in a high volume, high velocity flow.

Model Comparision

Model Comparison

Air Amplifier Comparison
   Efficiency  Sound
Super Air Amplifier High Low Yes With Shims 275°F
Aluminum Adjustable
Air Amplifier
Medium Variable No Infinite
(No shims)
Stainless Steel
Air Amplifier
Medium Variable No Infinite
(No shims)
High Temp.
Air Amplifier
High Low No With Shims 700°F
Super Air Amplifiers™ 
Super Air Amplifiers have the highest amplification ratios and are the most efficient of all Air Amplifiers. The patented* design uses a special shim to maintain critical position of the component parts. As a result, a precise amount of compressed air is released at exact intervals toward the center of the Super Air Amplifier. These jets of air create a constant, high velocity outlet flow across the entire cross sectional area.
Additional free air is pulled through the unit, resulting in higher amplification ratios. The balanced outlet airflow minimizes wind shear to produce sound levels that are typically three times quieter than other Air Amplifiers. Super Air Amplifiers cool truck pistons from 290°F to 100°F in 53 seconds.
(5) Model 120022 2" (51mm) Super
Air Amplifiers cool truck pistons prior
to gauging.
Super Air Amplifiers are supplied with a .003" (0.08mm) slotted air gap which is ideal for most applications. Flow and force can be increased by replacing the shim with a thicker .006" (0.15mm) or .009" (0.23mm) shim. Model 120028 is supplied with a .009" (0.23mm) air gap. A .015" (0.39mm) shim is available for Model 120028.
Adjustable Air Amplifiers™
Adjustable Air Amplifiers have good amplification ratios and are very easy to use. The air gap is infinitely adjustable which regulates the consumption and outlet flow from a "breeze" to a "blast". They are available in aluminum or in stainless steel for food service, higher temperatures (400°F/204°C), and corrosive applications. High Temperature Stainless Steel Air Amplifiers for temperatures up to 700°F (374°C) are available. Please contact an application engineer.
3" Adjustable Air Amplifier to Cool, Dry and Exhaust
3" Adjustable Air Amplifiers cool, dry and exhaust.
Force and flow for the Adjustable Air Amplifier is changed by turning the exhaust end (with the knurled ring loose) to open or close the continuous air gap. When desired performance is obtained, the knurled ring can be tightened to lock the flow at that setting. In most cases, a .002" to .004" (0.05mm to 0.10mm) air gap is ideal.
Metal parts are dried using a series of Model 6042 Adjustable Air Amplifiers.
Metal parts are dried using a series of Model 6042 2" (51mm) Adjustable Air Amplifiers

Special Air Amplifiers

Special Air Amplifiers

b7679fca668d46789bacd9378bc93278al rotomoldA Model 121021 High Temperature Air Amplifier directs hot air to a rotational mold cavity for uniform wall thickness of the plastic part.

EXAIR manufactures special Air Amplifiers suited to specific application requirements. The Model 121021 High Temperature Air Amplifier (see left) was developed for moving hot air to surfaces requiring uniform heating while in a furnace or oven. Modeled after our Super Air Amplifier, the High Temperature Air Amplifier is the most efficient for pushing high volumes of hot air to points that typically remain cool. This special design is rated for environments up to 700°F (374°C) and its surface is protected from heat stress by a mil spec. coating process (developed for the aircraft industry), allowing easy disassembly for changing shims or cleaning.

The special Air Amplifier (see right) with grooved intake mounts to the suction tube of a dust collector and is held in place with set screws. The exhaust is easily ducted into the existing dust collection system or can be directed into a filter bag.

f46cbf6f7ca44b3da88164f1b09003a0sal aampapp2This special Air Amplifier acts as a "booster" for a maxed out dust collection system. The recessed groove on the suction side allows secure mounting to the existing dust collector intake tube.
aal ptfeThe airflow from this stainless steel Adjustable Air Amplifier with PTFE plug helped pull a sticky material through a process and prevented the material from depositing on the Air Amplifier.

A PTFE plug (see left) was used with a stainless steel Adjustable Air Amplifier to help pull a sticky material through a process and prevent the material from depositing on the Air Amplifier.

Another stainless steel version for flange mounting (see right) was developed as a fan back-up for exhausting flue gases from a furnace. In the event of a power failure, this special Air Amplifier can quickly evacuate the fumes that could be harmful to workers close by.

EXAIR's Intelligent Compressed Air® products can be manufactured to your special requirements. If you have special requirements, please contact an Application Engineer at 1-800-903-9247 to discuss the application.

5cd71f4035ab485c920619aef1bd0e16mgamplifier1This special stainless steel flange mount Air Amplifier was designed for exhausting hot flue gases from a furnace




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About Us

HOVU CO., was established in 2002 and has been operating in its main scope of business as trading industrial equipments, machines and tools, as well as providing maintenance services, and engineering services. Our vision is to become a leading company in the field.

Contact Us

42B Le Truc Street, Ward 7, Binh Thanh District, HCMC, VN, 70000

Tel: +84 28 3512 5670

Fax: +84 28 3512 8129



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