Air amplifiers

Air amplifiers operating diagramAir amplifiers are inexpensive devices with virtually no maintenance that can convey fumes, smoke, lightweight materials and move a high volume of air for cooling, blow off and drying applications. They use the “Coanda" effect which entrains a large amount of surrounding air using only a small amount of compressed air.  The effect is an amplification of up to 17 times the air flow or more (depending on the size) with reduced noise levels.  The amplification effect is what differentiates an air amplifier from a simple air nozzle.

Air Movers or Air Amplifiers are annular units that entrain air from the back as well as downstream and are excellent flow amplifiers.  The force produced for blow off goes down as the diameter goes up but for cooling they are excellent and far more effective than air nozzles.  Also, as air is entrained from the back, they are also used for venting applications. 

The balance of force and air flow

Air amplifiers cooling cast partsAs mentioned previously, there has to be a balance between air flow amplified and velocity.  An Air Amplifier will have an air amplification ratio (air out right at the exit/air, input from the compressed air supply) from 6 to 15 to perform properly (6 being a small amplifier and 15 for larger sizes).  Any higher ratio, because you are then entraining more 'still' atmospheric air, would slow down the velocity so much that your blow off force would be very ineffective, and without adequate velocity, you will not get efficient cooling.  So if you see claims of high amplification ratios and high velocity simultaneously, it is wise to be dubious.  This is why Nex Flow offers units for comparative testing so the customer can confirm real results.


Standard (fixed) air amplifiers

Nex Flow’s  Standard Air Amplifier is easy to mount and maintain reducing both compressed air consumption and noise levels.  It takes energy from a small volume of compressed air to produce a high velocity, high volume, low-pressure output air flow.  Our Air amplifiers are quiet and can amplify flows up to 16 times their input air consumption rate. 

Air amplifers

Adjustable air amplifiers

The adjustable Air Amplifier is manufactured in anodized aluminum or in stainless steel for high temperature or food applications.  The customer can set the gap and lock it in place using a lock ring. They are used for a variety of applications.  Adjustable Air Amplifiers take energy from a small volume of compressed air to produce high velocity, high volume, low pressure output airflow.  They are quiet, efficient and can amplify flows up to 17 times the input air consumption rate.

Adjustable air amplifier

Typical applications

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

Air Nozzle Types


Share |

BETE Blogs