-Saturday, 22 May 2021

Formulas for Spray Nozzle GPM (Gallons Per Minute) & GPA (Gallons Per Acre)

 
Spray Nozzle Broadcast Application Guidelines including GPM (Gallons Per Minute) & GPA (Gallons Per Acre) Per Nozzle.
  • GPM: Gallons Per Minute
  • GPA: Gallons Per Acre
  • mph: Miles Per Hour
  • W: Nozzle spacing (in inches) for broadcast spraying
    • Spray width (in inches) for single nozzle, band spraying or boomless spraying.
    • Row spacing (in inches) divided by the number of nozzles per row for directed spraying.
 
 

PWM Calculation: To size nozzles, take the desired GPA Rate and divide it by .70 in order to target a 70% duty cycle.

For Example: If the target rate is 10 GPA, the equation would be 10 / .7 = 14.3. This is the GPA to look for in a tip chart.