- Individual plant treatments of herbicides through cone tip nozzles are used to control prickly pear cactus.prickly pear cactus image by Paul Moore from Fotolia.com
Cone tips produce cone-shaped spray patterns.The narrow part of the cone starts at the nozzle tip and continuously enlarges as it nears the spray target. Cone nozzles normally produce finer spray particles than fan-type nozzles. As a result, they are not recommended for herbicide broadcast treatments due to spray-drift concerns. Cone nozzles are used for individual plant treatments of herbicides because the spray is applied directly to the target and is therefore less prone to drift. - A hollow cone nozzle produces a cone-shaped pattern that has no spray in its center. According to an article on the United Kingdom Forestry Commission website, the hollow cone consists of a swirl plate surrounded by a swirl core, with the swirl chamber between the two. Liquid passes through the spiral slots in the swirl core and into the swirl chamber, where it acquires a high rotational velocity, discharging from the nozzle in a hollow cone spray pattern.
- The deflected-type hollow cone nozzle tip is also called a flood nozzle. This nozzle is a hollow cone with an attached deflector cap that produces a narrow rectangle spray pattern. For this nozzle to be effective, a constant height above the target must be maintained.
- Spraying Systems Company describes this nozzle as producing a hollow-cone pattern with spray droplets that are slightly coarser than those in other hollow-cone sprays. They say that a high flow rate is produced from a compact nozzle size.
- A full cone nozzle produces a cone pattern that is completely filled with spray droplets. This nozzle produces medium to large droplets with medium to large flow rates.
- The spiral-type full cone nozzle produces a spray with relatively coarse droplets. Spray coverage from this nozzle is not as uniform as from conventional full cone or hollow cone nozzles.
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