Design, Features & Introduction
Air atomizing spray nozzles produces fine mist spray with the help of compressed air, liquid breaks into small droplets as air provides sharing effects on liquid droplets. Various spray pattern are available, there are categorized into Flat and Round spray patterns. The droplet size can be adjusted by flow adjustment of compressed air. Air atomizing nozzles are divided into two types Internal and External mix air atomizing nozzles. Those are available in various metals.
1) Pressure Principle
Liquid is supplied in pressurised form with the help of pump or pressurised container, separate compressed air is needed
2) Siphon Principle
Siphon principle is utilised to lift liquid from certain height from spray nozzle, suitable where pump or pressurised container of liquid is not available.
3) Gravity head Principle
Gravitational head of liquid is utilised to feed liquid to the spray nozzle, suitable where pump or pressurized container of liquid is not available.
Choice of spray Nozzles
Each spray set-ups consists of an air cap and liquid cap which provide a specific spray pattern capacity and coverage performance
Inside Body Mixing
Liquid and air streams meet within nozzle and are mixed together
and expelled through the same orifice. This internal mixing means
the streams are not independent; a change in air flow will affect the
liquid flow. This makes precise metering of the liquid more difficult
than with an External Mix Set-up. Internal Mix set-up are able to
produce the finest atomization of any of the XA set-ups, but they are
generally not suitable for use with liquids which have a viscosity that
is above 200 centipoise.
Out Side Body Mixing
The air and liquid streams exit the nozzle independently and are
combined and mixed outside of the nozzles. Because there is no
connection between the air and liquid lines within the nozzles, the air
and liquid flow rates can be controlled independently, allowing
precise metering of the liquid. The atomization can be controlled by
adjusting the air flow rate more air produces finer atomization. In
most cases these set-up do not atomize as finely as Internal Mix Setups.
External Mix Set-up may be used with liquid having a viscosity
above 200 centipoise and for abrasive suspensions. Spraytech
provides Engineering guidance for spraying high viscosity liquids.
Tablet Coating
Pallet Coating
Atomization of viscous liquids
Agglomeration
Granulation
Humidification of air
Manual Shut-off / Cleaning Needle
Automatic self Cleaning Needle
Auto shut-off Arrangement
M1 = SS303/SS304
M2= SS316/M2L=SS316L
M3 = Brass (Nickel Plating on Request)
M4 = SS410/M4-3=SS310