“Spray Application Accuracy” Nozzle Selection

Why are you here???? Points??? Are you concerned with accuracy?

Equipment cost today? How much do these machines cost?

Electronics/Rate Controllers

The Weakest Link

Regardless of the cost: n n Without proper attention to the nozzle, you may end up with a misapplication

Nozzles Control n Amount of spray applied n Uniformity of the spray n Coverage on the target n Amount of off-target drift

Nozzle Types Flat Spray Tips: n n Extended Range Flat-fan n n Drift Reduction Flat-fan n n Turbo Flood Flat-fan n n Turbo Flat-fan n n AI Flat-fan TurboDrop Cone Spray Tips: n Raindrop

Selecting the proper nozzle Legal issues!!

Rated Pressure = 40 psi for most nozzle types 10 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 system Extended-rangeflat-fan XR XRExtended-range degree fan angle psi Even flat-fan – (Band applications) 8002EE Even spray pattern degree fan angle psi Turbo flood - (small capacity) TF- 4 TF Turbo flood psi Turbo flood – (Floater capacity) QCTF - 40 QCTF Quick attach turbo flood psi

Typical nozzle numbering system Extended-rangeflat-fan XR XRExtended-range degree fan angle psi Even flat-fan – (Band applications) 8002EE Even spray pattern degree fan angle psi Turbo flood - (small capacity) TF- 4 TF Turbo flood psi Turbo flood – (Floater capacity) QCTF - 40 QCTF Quick attach turbo flood psi

Set up for Uniformity Goal is to put the material on evenly from nozzle to nozzle, end of boom to end of boom, and across the entire field.

1. Nozzle Flow Rate - Gallons Per Minute (GPM) Pressure? 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) 1/2 Variables

Select the correct size of nozzle! n Calculate GPM – Flow rate per nozzle n Label –product rate –application volume - GPA n Choose an appropriate travel speed (MPH) n Effective Width of application –Nozzle spacing –Swath width W”

MATERIALS AND WEAR Percent increase in nozzle flow rate Flat-fan spray nozzles after 40 hour test

Coverage n Need knowledge of the product being used. –Systemic –Contact n What is the target? –Soil –grass –broadleaf (smooth, hairy, waxy)

Calculations GPA= 5940

Flow Rate Equation n Calculates for amount of flow from one nozzle n Represents the size of nozzle to put on the sprayer n Calculates for amount of flow from one nozzle n Represents the size of nozzle to put on the sprayer

Calculations GPA= 5940 Ok, now I remember!

Calibration/Nozzle Selection n What is the first step? n Use label to select the –application volume –product rate n Choose an appropriate travel speed n Effective width of application –nozzle spacing n Calculate GPM n Size of nozzle!

Flow Rate Equation

gallons per acre gallons per minute GPA = ______________________ GPM = ______________________ MPH = ______________________ W = ______________________ = a constant to convert gallons per minute, miles per hour, and inches to gallons per acre 5940 = a constant to convert gallons per minute, miles per hour, and inches to gallons per acre miles per hour nozzle spacing - inches Where:

Nozzle size - Variables n Nozzle flow rate (GPM) n Ground speed (MPH) n Effective sprayed width (W) n Application rate (GPA)

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=? GPA=10 MPH=5 W=20

GPM Example Solution Answer.17

n Calculate GPM (formula) n Look under ‘Capacity of 1 nozzle in GPM’ column n Match to pressure-psi n Choose the size needed n Operate at given pressure and speed to achieve GPA Selecting the proper nozzle….

0.17 gpm 20” 10 GPA 5 mph

ANOTHER $&#%!!# $&#%!!#FORMULA 0.17 GPM 5 MPH20” 10 GPA

Checklist 200 Feet in 27 seconds = 5 MPH X Buy a speed sensor 