The selection of a spray nozzle should be based on the application and desired outcome. The characteristics of a spray nozzle include its size, flow rate, atomization, and angle of attack. Several factors are taken into account, including the specific gravity of the liquid and its application. Testing is done using water for water hose dipped in the nozzle or air for air hose dipped in it. Typically, the higher the surface tension, the less uniform the spray will be.
The spray nozzle should be used in accordance with the diluent. In most cases, water is used as a diluent. However, the pesticide’s label will usually specify a different diluent. This is the most common type of diluent. In this case, most of the nozzle selection charts are based on the diluent. For a better understanding of how to choose the best diluent, consult a nozzle catalog or find an online app.
A spray nozzle should be calibrated on a regular basis. The procedure is simple and only requires three measurements: actual ground speed, distance between nozzles, and flow rate over a certain amount of time. This process can be done by a certified technician. A publication by OSU Extension can help you do it yourself. You should also check the sensitivity of the nozzle in your application to ensure its effectiveness. And, once you know what type of a spray nipple you have, you can easily calibrate your nipples.
Most broadcast herbicide and insecticide spraying is done with regular flat-fan nozzles. These nozzles are used for a wide variety of spray applications. This type produces a tapered oval-like pattern with tapered edges. There are three basic types of flat-fan nipples: “low-drift” and “flat-fan”. Both of these categories are considered low-drift nozzles.
Pre-orifice nozzles produce a standard flat-fan pattern. Their lowered exit pressure reduces the risk of drifting fines. This lowers the risk of off-target movement of the spray pattern. The flow rate and droplet size of the nozzle should be compatible with the application. It should also be compatible with the type of fluid and diluent. A diluent can be used in most spray applications.
The flow rate of a particular nozzle is the amount of liquid sprayed per unit area. This is important because it affects the coverage of the target and the risk of spray drift. In contrast, a narrow-band nozzle is ideal for a broad-band spraying application. So, it is important to select the right diluent for the application. A diluent can increase the flow rate of the spray.
To select the correct spray nozzle, consider the purpose of the application and the kind of liquid to be sprayed. There are many types of atomizers for a wide variety of applications. You may need to choose one that has a large output to spray a wide area. It is also important to remember that the type of atomizer you choose should be compatible with the liquids you intend to spray. A diluent nozzle can also cause damage.