Elliptical Orifice Flat Fan Nozzles for Coating

With these nozzles the spray pattern is formed by the exit of the fluid through a shaped orifice.

The tapered nature of the flat fan spray pattern means that spray distribution is not entirely even.  The ends of the spray pattern have less fluid delivered.  In order to achieve an even spray bar with a series of nozzles a slight overlapping of the spray patterns from the individual nozzles should be built in.  Once the level of spray loss at the edges of the pattern are known it is then just a matter of simple trigonometry to give an even distribution of spray.

Apart from the tapering at the end of the elliptical orifice nozzles the spray is fairly uniformly distributed.  This means that low flow rate variants may be suitable for coating applications.  That being said, the relative span of droplet sizes and average droplet size is considerably higher than air atomising sprays meaning that they would only be suitable for heavier coatings.