Air Atomising Nozzles for Humidification

These nozzles use a secondary fluid or gas to break up the primary spraying fluid into an exceptionally fine spray (atomisation).  The secondary fluid is usually air (but it can be any gas), hence the name air atomising.

Full Cone Nozzle Air Atomising Design

Very fine fog at low flow rates

The main advantage of these over other types of misting nozzle is that they can form a fog pattern with very low flow rates and pressures.  With impingement and small orifice fog nozzles the energy to atomise the fluid comes from the potential energy of fluid itself.  This means that there is a natural restriction in minimum flow rates and pressure.  With air atomisation a secondary source of kinetic energy is introduced in the form of pressurised gas.  This is used to break up the fluid into a spray pattern.  As such, atomisation and fog spray patterns can be maintained with much lower fluid flows from this type of nozzle.

Also the pressurised air used to break up the fluid can also be used to project the spray from the nozzle.  This gives the very fine sprays produced a reach they would not normally have.

Bete produce a number of air atomising nozzles for humidifying applications.  We would normally recommend the full or hollow cone spray pattern variants.

The XApr is a full cone nozzle that can project the spray up to 8 metres and so would be useful for spraying into windy conditions.  The XAad gives a 70o spray angle and so will disperse spray more widely than the XApr.  The XAxw is a 180o hollow cone nozzle which gives a wider coverage still.

XApr air atomising, full cone internal mix Air atomising Hollow Cone Nozzle Extra Wide Angle Air atomising Hollow Cone Nozzle

 

Humidification Engineering Considerations 

Humidification Nozzle Designs