Nozzle Selection and Sizing ExampleSuppose a postemergence herbicide is to be broadcast at 15 GPA at a speed of 5 mph. Step 1: Using Table 7 as a guide, the best choice is a Turbo TeeJet. The recommended nozzle spacing is 30 inches.Step 2: The operating conditions are provided above.Step 3: Determine the nozzle output in GPM; calculate the required nozzle discharge using Equation 1:Nozzle Discharge = 5 mph X 30 inches X 15 GPA = 0.38 GPM(GPM) 5940Step 4: Consult a nozzle catalog. The selected nozzle must have a flow discharge of 0.38 GPM when operated within the recommended range for the nozzle. A nozzle-performance table shows the discharge rate at various pressures for several nozzle sizes. Table 9 shows that four nozzles listed in the catalog are possible choices: TT11003, TT11004, TT11005, or TT11006 nozzles may be purchased for this application, but the TT11004 gives the most flexibility with a wide pressure range for fine-tuning.Table 9. Nozzle data and comparison of pressures and discharge.CatalogCalculated From Eq. 2NozzlepsiGPMpsiGPMTT11003600.37640.38TT11004300.35360.38TT11005200.35240.38TT11006150.37160.38