““Spray Application Accuracy”Spray Application Accuracy”

Nozzle Selection

Why are you here????Are you concerned with accuracy? $$ go bye, bye$$ go bye, bye Changing rates (< an ounce/acre)Changing rates (< an ounce/acre) More foliar applied products (herbicides)More foliar applied products (herbicides) More sophisticated equipment - $$$More sophisticated equipment - $$$ Environmental impact (water and air)Environmental impact (water and air) InefficientInefficient Variable ratesVariable rates Site-specificSite-specific

Points???Points???

Equipment cost today?

How much do these machines cost?How much do these machines cost?

What about the cost of the nozzle?

Regardless of the cost:

Without proper attention to the nozzle, you may end up with a misapplication

Nozzles Control Amount of spray appliedAmount of spray applied Uniformity of the sprayUniformity of the spray Coverage on the targetCoverage on the target Amount of off-target driftAmount of off-target drift

Nozzle TypesFlat Spray Tips: Extended Range Flat-fan Drift Reduction Flat-fan Turbo Flood Flat-fan Turbo Flat-fan AI Flat-fan TurboDropCone Spray Tips: Raindropaindrop

Selecting the proper nozzleLegal issues!!Legal issues!!

Rated Pressure =40 psi for most nozzle types10 psi for turbo flood nozzles

Nomenclature:

Stainless Steel Insert Orifice

Trade Name

Fan angle and flow rate-orifice size

Extended Range

VisiFlo Color Coding

(S,H,P,K,SS)

Typical nozzle numbering systemExtended-rangeExtended-range

flat-fanflat-fan

XR 11004XR 11004 XRXR Extended-rangeExtended-range

110110 110 degree fan angle110 degree fan angle

0404 0.4 GPM @ 40 psi0.4 GPM @ 40 psi

Even flat-fan –Even flat-fan –(Band applications)(Band applications)

8002E8002E EE Even spray patternEven spray pattern

8080 80 degree fan angle80 degree fan angle

0202 0.2 GPM @ 40 psi0.2 GPM @ 40 psi

Turbo flood -Turbo flood -(small capacity)(small capacity)

TF- 4TF- 4 TFTF Turbo floodTurbo flood

44 .4 GPM @ 10 psi.4 GPM @ 10 psi

Turbo flood –Turbo flood –(Floater capacity)(Floater capacity)

QCTF - 40QCTF - 40 QCTFQCTF Quick attach turbo floodQuick attach turbo flood

4040 4.0 GPM @ 10 psi4.0 GPM @ 10 psi

Electronics/Rate Controllers How does your system How does your system

work when speed work when speed changes?changes?

Is it pressure based? Is it pressure based? What is the effect of What is the effect of

going slower?going slower? What is the effect of What is the effect of

going faster?going faster?

Typical nozzle numbering systemExtended-rangeExtended-range

flat-fanflat-fan

XR 11004XR 11004 XRXR Extended-rangeExtended-range

110110 110 degree fan angle110 degree fan angle

0404 0.4 GPM @ 40 psi0.4 GPM @ 40 psi

Even flat-fan –Even flat-fan –(Band applications)(Band applications)

8002E8002E EE Even spray patternEven spray pattern

8080 80 degree fan angle80 degree fan angle

0202 0.2 GPM @ 40 psi0.2 GPM @ 40 psi

Turbo flood -Turbo flood -(small capacity)(small capacity)

TF- 4TF- 4 TFTF Turbo floodTurbo flood

44 .4 GPM @ 10 psi.4 GPM @ 10 psi

Turbo flood –Turbo flood –(Floater capacity)(Floater capacity)

QCTF - 40QCTF - 40 QCTFQCTF Quick attach turbo floodQuick attach turbo flood

4040 4.0 GPM @ 10 psi4.0 GPM @ 10 psi

Set up for UniformityGoal 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.

20-inch spacing requires 17-19” above 20-inch spacing requires 17-19” above target for 50-60% overlap.target for 50-60% overlap.

Set Up For Uniformity

What is the first step?What is the first step? Use label to select the Use label to select the

– application volumeapplication volume– product rateproduct rate

Choose an Choose an appropriateappropriate travel speed travel speed Effective width of applicationEffective width of application

– nozzle spacingnozzle spacing Calculate GPM – Calculate GPM – Flow rate per nozzleFlow rate per nozzle Select the correct size of nozzle!Select the correct size of nozzle!

Label requirements?Label requirements?

Set Up For Set Up For UniformityUniformity

Set Up For Set Up For UniformityUniformity

• Determine Your Field Speed

– Know it to maintain it!

200 Feet in 27 seconds20

027= 5 MPH

X 0.682

Buy a Buy a speed speed sensorsensor

Set Up For Uniformity

What is the first step?What is the first step? Use label to select the Use label to select the

– application volumeapplication volume– product rateproduct rate

Choose an Choose an appropriateappropriate travel speed travel speed Effective width of applicationEffective width of application

– nozzle spacingnozzle spacing Calculate GPM – Calculate GPM – Flow rate per nozzleFlow rate per nozzle Select the correct size of nozzle!Select the correct size of nozzle!

MATERIALS AND WEAR

0 2 4 6 8 10 12 14 16

Brass

Zytel

Stainless

Kematal

Hard Stainless

Thermoplastic

11.4

7.5

6.1

2.1

1.2

0.4

Percent increase in nozzle flow rateFlat-fan spray nozzles after 40 hour test

Coverage Need knowledge of the product being used.Need knowledge of the product being used.

– SystemicSystemic– ContactContact

What is the target?What is the target?– SoilSoil– grassgrass– broadleaf (smooth, hairy, waxy)broadleaf (smooth, hairy, waxy)

Calculations

GPA=

5940

#$!@&%!#$!@&%!

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

Calculations

GPA=

5940

Ok, now I remember!Ok, now I

remember!

Calibration/Nozzle Selection What is the first step?What is the first step? Use label to select the Use label to select the

– application volumeapplication volume– product rateproduct rate

Choose an appropriate travel speedChoose an appropriate travel speed Effective width of applicationEffective width of application

– nozzle spacingnozzle spacing Calculate GPMCalculate GPM Size of nozzle!Size of nozzle!

Nozzle size - Variables

Nozzle flow rate (GPM)Nozzle flow rate (GPM) Ground speed (MPH)Ground speed (MPH) Effective sprayed width (W)Effective sprayed width (W) Application rate (GPA)Application rate (GPA)

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

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:

1. Nozzle Flow Rate - Gallons Per Minute (GPM)To double the nozzle output, the pressure must increase times

2. Ground speed - Miles Per Hour (MPH)

Doubling the ground speed reduces GPA rate by___ 3. Effective Sprayed Width (W) (Nozzle spacing, band width, number of nozzles on drop)

4

1/2

Variables

Electronics/Rate Controllers

How does your system How does your system work when speed work when speed changes? changes?

What is the effect of What is the effect of going slower?going slower?

What is the effect of What is the effect of going faster?going faster?

• 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

GPA Example Solution

GPM=? GPA=? MPH=? W=?

GPM=? GPA=10 MPH=5 W=20

GPMGPA x MPH x W

5940

GPM Example Solution

GPMGPA x MPH x W

5940

5940

20x5x10GPM

Answer.17

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….

Selecting the proper nozzle….