Summers Truck Supersprayer - Manual (Page 20)

SECTION 3 - SPRAYER OPERATION
3.6
2. DETERMINE APPLICATION RATE
a. Choose a desired ground speed within factory recommended range of 4 to 12 miles per hour
(mph).
b. By knowing tip size and desired ground speed, refer to English or Metric Application Rate
Chart (shown on following pages) to determine application rate (U.S. gallons per acre or liters
per hectare) based on different operating pressures.
c. Example of how to obtain 5.0 U.S. gallons per acre application rate:
1. Determined tip size to be XR8001.
2. Select a desired ground speed of 6 miles per hour (mph).
3. Refer to English Application Rate Chart (shown on following page) to see that XR8001 tips
traveling at 6 mph will deliver 5.0 U.S. gallons per acre at 40 psi operating pressure.
d. Spraying solutions other than water: All tabulations in this manual are based on spraying water,
which weighs 8.34 lbs per gallon. Conversion factors must be used when spraying solutions
that are heavier or lighter than water. To determine the proper size nozzle for the solution to be
sprayed, multiply the desired rate by the conversion factor. Then use the new converted GPM
or GPA rate to select the proper size nozzle.
Example: Desired application rate is 20 GPA of 28% N. Determine the correct nozzle size as follows:
GPA (solution) x Conversion Factor = GPA (from table)
20 GPA (28%) x 1.13 = 22.6 GPA (water)
The applicator should choose a nozzle size that will supply 22.6 GPA of water at the desired pressure
Weight of Solution
Specific
Gravity
Conversion
Factors
Weight of Solution
Specific
Gravity
Conversion
Factors
7.0 lbs. per gallon 0.84 0.92 10.65 lbs. per gallon 1.28 1.13
8.0 lbs. per gallon 0.96 0.98 11.0 lbs. per gallon 1.32 1.15
8.34 lbs. per gallon
- water
1.00 1.00 12.0 lbs. per gallon 1.44 1.2
9.0 lbs. per gallon 1.08 1.04 14.0 lbs. per gallon 1.68 1.3
10.0 lbs. per gallon 1.20 1.10