Cone nozzles are used primarily when plant foliage penetration is essential for effective insect or disease control and when drift is not a significant concern. At pressures of 40 to 80 psi, these nozzles produce tiny droplets that readily penetrate plant canopies and cover the underside of the leaves more effectively than any other nozzle type. However, because of the tiny droplets produced and high operating pressures, these nozzles produce patterns that are very susceptible to drift and should therefore never be used with any chemical for which drift can cause a problem. They also are tough to arrange along with a boom for uniform distribution and are therefore not recommended for broadcasting herbicides.
This nozzle is similar in design to other venturi nozzles but has a stainless-steel exit tip. Good patterns are produced between 30 and 100 psi, with optimum pressures of 60 to 80 psi. The nozzle produces a very coarse to a highly coarse spray droplet, depending on pressure and nozzle size.
Droplet size varies from very fine to very coarse. As the pressure in your sprayer increases, droplet size decreases. The most delicate droplets work well for delivering contact chemicals that need to be retained on leaves. Medium-sized droplets are most commonly used and work best for delivering systemic chemicals such as insecticides and fungicides. The coarsest droplets are typically used to deliver residual herbicides or to lessen the chance of spray drift.
Even at a gauge pressure of 80 psi, the exit tip pressure may be only 20 to 40 psi. Oversee patterns, and set your boom at the height needed to achieve proper overlap.
The exit orifice typically has about twice the flow rate of the metering orifice, reducing the likelihood of plugging. If this orifice plugs, the nozzle will have to be removed for cleaning.
This nozzle is a flat fan-type with a pressure-reducing chamber that produces a uniform spray pattern over a pressure range of 15 to 115 psi. The wide pressure range makes it an excellent choice for equipment using rate controllers that vary the pressure. It has a one-piece design that includes the nozzle, cap, gasket, and removable filter.
It is also important to note that you should always use the same nozzles together. In other words, do not mix and match different nozzles because this will give you a very uneven spray pattern. Depending on the placement of the various nozzles, it may also cause damage to the nozzles, boom, or sprayer.
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