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The Weakest Link
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Set up for Uniformity
Goal is to put the material on evenly from Goal is to put the material on evenly from nozzle to nozzle, end of boom to end of nozzle to nozzle, end of boom to end of boom, and across the entire field.boom, and across the entire field.
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Select the correct size of
nozzle! Calculate Calculate GPMGPM – – Flow rate per nozzleFlow rate per nozzle LabelLabel
– product rateproduct rate
– application volume - application volume - GPAGPA Choose an Choose an appropriateappropriate travel speed travel speed ((MPHMPH)) Effective Effective WWidth of applicationidth of application
–Nozzle spacing Nozzle spacing –Swath widthSwath widthW”
W”
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Calculations
GPA=
5940
#$!@&%!#$!@&%!
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Flow Rate Equation
GPMGPA x MPH x W
5940
Calculates for amount of flow Calculates for amount of flow from one nozzlefrom one nozzle
Represents the size of nozzle to Represents the size of nozzle to put on the sprayerput on the sprayer
Calculates for amount of flow Calculates for amount of flow from one nozzlefrom one nozzle
Represents the size of nozzle to Represents the size of nozzle to put on the sprayerput on the sprayer
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Calculations
GPA=
5940
Ok, now I remember!Ok, now I
remember!
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Flow Rate Equation
GPMGPA x MPH x W
5940
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gallons per acregallons per minute
GPA = ______________________GPA = ______________________
GPM = ______________________GPM = ______________________
MPH = ______________________MPH = ______________________
W = ______________________W = ______________________
5940 = a = a constantconstant to convert to convert gallons per minute, miles per gallons per minute, miles per hour, and inches to gallons per hour, and inches to gallons per acreacre
miles per hournozzle spacing - inches
Where:
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• You want to broadcast a foliar herbicide at 10 GPA traveling 5 MPH using extended range flat-fan nozzles on 20-inch spacing.
• Use equation to calculate for flow rate?
GPM Example
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GPA Example Solution
GPM=? GPA=? MPH=? W=?
GPA=10 MPH=5 W=20
GPMGPA x MPH x W
5940
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GPM Example Solution
GPMGPA x MPH x W
5940
5940
20x5x10GPM
Answer.17
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Calculate GPM (formula)Calculate GPM (formula) Look under ‘Capacity of 1 Look under ‘Capacity of 1
nozzle in GPM’ columnnozzle in GPM’ column Match to pressure-psiMatch to pressure-psi Choose the size neededChoose the size needed Operate at given pressure Operate at given pressure
and speed to achieve GPAand speed to achieve GPA
Selecting the proper nozzle….
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Selecting the proper nozzle….
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0.17 gpm
20” 10 GPA5 mph
GPMGPA x MPH x W
5940
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ANOTHERANOTHER $&#%!!#$&#%!!#FORMULAFORMULA
0.17 GPM
5 MPH 20”10 GPA
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ChecklistChecklist
200 Feet in 27 seconds20
027= 5 MPH
X 0.682
Buy a Buy a speed speed sensorsensor
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