1
Spray Application Accuracy
Nozzle Selection
2
Why are you here????Are you concerned with
accuracy?
Points???

• go bye, bye
• Changing rates (lt an ounce/acre)
• More foliar applied products (herbicides)
• More sophisticated equipment -
• Environmental impact (water and air)
• Inefficient
• Variable rates
• Site-specific

3
Equipment cost today?

• How much do these machines cost?

4
What about the cost of the nozzle?
5
Regardless of the cost

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

6
Nozzles Control

• Amount of spray applied
• Uniformity of the spray
• Coverage on the target
• Amount of off-target drift

7
Nozzle Types

• Flat Spray Tips
• Extended Range Flat-fan
• Drift Reduction Flat-fan
• Turbo Flood Flat-fan
• Turbo Flat-fan
• AI Flat-fan
• TurboDrop

• Cone Spray Tips
• Raindrop

8
Selecting the proper nozzle

• Legal issues!!

9
Nomenclature
Extended Range
Trade Name
(S,H,P,K,SS)
Stainless Steel Insert Orifice
VisiFlo Color Coding
Fan angle and flow rate-orifice size
Rated Pressure
40 psi for most nozzle types 10 psi for turbo
flood nozzles
10
Typical nozzle numbering system
Extended-range flat-fan XR 11004 XR Extended-range
Extended-range flat-fan XR 11004 110 110 degree fan angle
Extended-range flat-fan XR 11004 04 0.4 GPM _at_ 40 psi
Even flat-fan (Band applications) 8002E E Even spray pattern
Even flat-fan (Band applications) 8002E 80 80 degree fan angle
Even flat-fan (Band applications) 8002E 02 0.2 GPM _at_ 40 psi
Turbo flood - (small capacity) TF- 4 TF Turbo flood
Turbo flood - (small capacity) TF- 4 4 .4 GPM _at_ 10 psi
Turbo flood (Floater capacity) QCTF - 40 QCTF Quick attach turbo flood
Turbo flood (Floater capacity) QCTF - 40 40 4.0 GPM _at_ 10 psi
11
Electronics/Rate Controllers

• How does your system work when speed changes?
• Is it pressure based?
• What is the effect of going slower?
• What is the effect of going faster?

12
Typical nozzle numbering system
Extended-range flat-fan XR 11004 XR Extended-range
Extended-range flat-fan XR 11004 110 110 degree fan angle
Extended-range flat-fan XR 11004 04 0.4 GPM _at_ 40 psi
Even flat-fan (Band applications) 8002E E Even spray pattern
Even flat-fan (Band applications) 8002E 80 80 degree fan angle
Even flat-fan (Band applications) 8002E 02 0.2 GPM _at_ 40 psi
Turbo flood - (small capacity) TF- 4 TF Turbo flood
Turbo flood - (small capacity) TF- 4 4 .4 GPM _at_ 10 psi
Turbo flood (Floater capacity) QCTF - 40 QCTF Quick attach turbo flood
Turbo flood (Floater capacity) QCTF - 40 40 4.0 GPM _at_ 10 psi
13
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.
• 20-inch spacing requires 17-19 above target for
  50-60 overlap.

14
Set Up For Uniformity

• What is the first step?
• Use label to select the
• application volume
• product rate
• Choose an appropriate travel speed
• Effective width of application
• nozzle spacing
• Calculate GPM Flow rate per nozzle
• Select the correct size of nozzle!

15
Set Up For Uniformity

• Label requirements?

16
Set Up For Uniformity

• Determine Your Field Speed
• Know it to maintain it!

200 Feet in 27 seconds
20027
X 0.682
5 MPH
Buy a speed sensor
17
Set Up For Uniformity

• What is the first step?
• Use label to select the
• application volume
• product rate
• Choose an appropriate travel speed
• Effective width of application
• nozzle spacing
• Calculate GPM Flow rate per nozzle
• Select the correct size of nozzle!

18
MATERIALS AND WEAR
Percent increase in nozzle flow rate Flat-fan
spray nozzles after 40 hour test
19
Coverage

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

20
Calculations
!_at_!
GPA
5940
21
Flow Rate Equation

• Calculates for amount of flow from one nozzle
• Represents the size of nozzle to put on the
  sprayer

22
Calculations
Ok, now I remember!
GPA
5940
23
Calibration/Nozzle Selection

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

24
Nozzle size - Variables

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

25
Flow Rate Equation

• Calculates for amount of flow from one nozzle
• Represents the size of nozzle to put on the
  sprayer

26
Where
gallons per acre

• GPA ______________________
• GPM ______________________
• MPH ______________________
• W ______________________
• 5940 a constant to convert gallons per
  minute, miles per hour, and inches to gallons per
  acre

gallons per minute
miles per hour
nozzle spacing - inches
27
Variables
1. Nozzle Flow Rate - Gallons Per Minute (GPM)
To double the nozzle output, the pressure must
increase times
4
2. Ground speed - Miles Per Hour (MPH)
1/2
Doubling the ground speed reduces GPA rate by___

3. Effective Sprayed Width (W) (Nozzle spacing,
band width, number of nozzles on drop)
28
Electronics/Rate Controllers

• How does your system work when speed changes?
• What is the effect of going slower?
• What is the effect of going faster?

29
GPM Example

• 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?

30
GPA Example Solution
GPM?
GPA?
MPH?
W?
GPM?
GPA10
MPH5
W20
31
GPM Example Solution
.17
Answer
32
Selecting the proper nozzle.

• Calculate GPM (formula)
• Look under Capacity of 1 nozzle in GPM column
• Match to pressure-psi
• Choose the size needed
• Operate at given pressure and speed to achieve GPA

33
Selecting the proper nozzle.