Hydraulic nozzles for use on boom sprayers
The data provides the technical information needed to enable a good choice of nozzles for boomspraying in particular conditions.
| Spray pattern | Nozzle type | Common use | Operating pressure (kPa) | Droplet size D (v,0.5) †μm | Remarks |
|---|---|---|---|---|---|
| Flat fan | Standard | Herbicides | 200-400 | Fine–medium <144-340 | Main nozzle used in broadscale spraying |
| Flat fan | Low pressure | Broad-leaved weed or pre-emergence herbicides | 100-250 | Medium-coarse 236-403 | Large droplets result in less drift. Good control of broad-leaved weeds |
| Flat fan | Extended range | Herbicides | 100-400 | Fine-coarse <144-403 | Designed to operate over a large pressure range. Droplet size between standard and low pressure nozzles |
| Flat fan | Air induction | Herbicides and fungicides | 200-800 | Coarse-extremely coarse 341-502 | Large droplets result in less drift but have relatively good coverage. Good application on broad leaves |
| Flat fan | Air assist (twin fluid) | Herbicides and fungicides | 200-600 | Medium-coarse 236-403 | Ability to change droplet size by changing air pressure |
| Flat fan | Twin | Post-emergence herbicides, fungicides | 250-400 | Fine <144-235 | One fan is angled ~30° forwards and the second is angled ~30° back for better leaf coverage |
| Flat fan | Wide angle | Banding between rows | 150-400 | Fine <144-235 | Two outlets project either side of the nozzle to produce one wide angle fan |
| Flat fan | Flooding | High volume pre-emergence herbicides | 100-250 | Coarse 341-403 | Large droplets result in less drift. High volume application |
| Even fan | Standard | Banding between rows | 150-250 | Medium 236-340 | Produce a uniform distribution across the fan pattern |
| Hollow cone | Standard | Low volume | 400-800 | Fine | Main nozzle used for insecticide |
| Hollow cone | Standard | Insecticides and fungicides | 400-800 | <144-235 | Main nozzle used for insecticide and fungicide application |
| Hollow cone | Whirl | Herbicides | 100-400 | Fine-coarse <144-403 | Nozzles available for the application of pre-emergence and post-emergence herbicides. Large passageway minimises clogging |
| Solid cone | Standard | High volume insecticides and fungicides | 400-2500 | Medium 236-340 | High volume for good penetration of foliage |
| Solid cone | Full | Pre-emergence herbicides | 100-300 | Coarse 341-403 | Large droplets result in less drift |