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Selecting Nozzles while Calibrating Your Field Sprayer

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Selecting Nozzles while Calibrating Your Field Sprayer. Cecil Tharp. Pesticide Education Program ... Spray area with water and time how long it takes. Constant ... – PowerPoint PPT presentation

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Title: Selecting Nozzles while Calibrating Your Field Sprayer


1
Selecting Nozzles while Calibrating Your Field
Sprayer
  • Cecil Tharp
  • Pesticide Education Program
  • Montana State University Extension

2
Proper Calibration Offers
  • Better Pest Control
  • Environmental and human safety
  • Effective use of time
  • Save

3
Backpack Sprayer (GPA) 128th Acre Method
  • Use water when calibrating
  • Use same nozzles and filters as when spraying
  • Measure an 18 ½ by 18 ½ ft area.
  • Spray area with water and time how long it takes
  • Constant speed and constant pressure
  • Spray water into a container for same amount of
    time.
  • Ounces Gallons Per Acre Applied

4
Sample Scenario Using 128th Acre Scenario
  • Takes 10 seconds to spray 128th Acre
  • In 10 seconds you spray 10 ounces.
  • What is the GPA output?

10 GPA
5
CALIBRATING BOOM SPRAYERS
  • Find GPA? How?

6
Product Label Recommendations
  • Your product label often describes the proper GPA
    (gallons per acre) for your sprayer.
  • ex. 20 GPA is recommended
  • Use the 5940 METHOD to find your nozzle size
  • GPM GPA W MPH / 5940

7
5940 method
  • GPM GPA W MPH / 5940
  • GPA Gallons Per Acre (product label)
  • GPM Gallons per Minute collected from a single
    nozzle (Make sure all nozzle are within a 5
    range.)
  • 5940 is a constant
  • MPH Field Speed
  • W 1) width between nozzles in inches or 2)
    width of a broadjet swath in inches.

8
Selecting the Appropriate Nozzle
  • GPM GPA W MPH / 5940
  • Lets say you need to spray 20 GPA, you have 30
    spaced nozzles, and you will drive 5 mph.
  • GPM 20 GPA 30 5mph / 5940
  • 0.505 or 0.5 GPM nozzles needed

9
Selecting Nozzles (TeeJet.com)
  • Solid Stream Nozzles
  • Handgun sprayers (livestock, tree pests, crevice
    treatment)
  • Cone Nozzles
  • Complete penetration desired
  • Fan Pattern Nozzles
  • Uniform spray coverage
  • Most Common

10
Find the correct nozzles
  • Flat Fan Nozzles
  • Standard 30 60 PSI
  • Even (E) uniform / banded applications
  • Extended Range (XR or LFT) 15 25 PSI / drift
    control can be as high as 60 PSI
  • ex. XR8001SS
  • Spray angles are 65, 73, 80, and 110
  • We obtained 0.5 GPM so you would need a nozzle
    labeled with 05.

11
Selecting the right Nozzles (what material)
  • Nozzle Material Nozzle Life
  • Brass (B) Poor
  • Nylon Fair
  • Stainless Steel (S) Good
  • Plastic Good
  • Hardened Stainless Steel Excellent

12
Nozzle Description
  • Ex. XR8001SS
  • 1st 2 letters are the acronym for type of nozzle
    (Extended Range Flat Fan)
  • Last 2 numbers are always GPM .1 GPM
  • Numbers remaining determine the width of your
    spray from each nozzle 80 degrees / determines
    height of your sprayer
  • Last 2 letters are always material. Stainless
    Steel

13
Examples of what you will see
  • Some Examples of Nozzle Material Acronyms
  • XR8004VS -  Stainless Steel with Visflo
    color-coding    
  • XR11004-VP -  Polymer with VisiFlo
    color-coding    
  • XR11004-VK -  Ceramic with polypropylene VisiFlo
    color-coding    
  • XR8010SS -  Stainless Steel    
  • XR11004VB -  Brass with VisiFlo color-coding
    (110)

14
Double Check your GPA Annually
  • Goal To determine how many gallons of liquid
    your sprayer actually emits onto 1 acre.
  • Boom Sprayer
  • Shortcut Method to Determine GPA
  • Longhand Method

15
Check nozzle spacing and height
16
Boom Level or Nozzle Angle Correct
17
Worn Spray Tips
18
Verify that all nozzles are equal
19
Nozzle Output
  • Check nozzle output for 1 minute and get average
  • If each nozzles output is not greater or less
    than 5 off of average, all is well.
  • How?

20
5 error level
  • To find 5
  • Find your average48 oz
  • Move the decimal place one space to the left.
    48. 4.8 This is a 10 error
  • Divide by 2 2.4.
  • This is 5 error
  • Now add 2.4 to 48 for 5
  • Subtract 2.4 from 48 for
  • 5 Error range 45.6 and 50.4
  • Any nozzle output between 45.6 and 50.4 is OK!

21
GPA for Boom Sprayer cont. Shortcut Method
  • 1st Determine Nozzle output is same.
  • 2nd Flag out Course Length based on your nozzle
    spacing
  • 18 227 course length
  • 20 204 course length
  • 30 136 course length
  • 40 102 course length
  • Or 340 / spacing in feet
  • 3rd - Drive course in gear and rpm you
  • will use when spraying and
  • time yourself.

22
GPA for Boom Sprayer cont..
  • Conduct 2 or 3 times and get average
  • 4th - Collect liquid from 1 nozzle for this
  • amount of time
  • 5th - Ounces of liquid collected GPA

23
Sample Scenario Boom Sprayer
  • 18 wide nozzles, 6 nozzles
  • What to do?
  • Travel 227 and time
  • 30 seconds
  • Measure amount delivered in that 30 seconds
  • 15 ounces in 30 seconds
  • 15 GPA

24
You know GPA, now how much solution do you need?
  • Acres GPA Volume in Tank
  • 10 acres 30 GPA 300 Gallons

25
How much chemical do you need?
  • Acres product rate Total Product
  • Product Rate 2 pints / Acre
  • You will be spraying 10 acres
  • 20 pints of product

26
Sample Questions
  • You have an output of 20 GPA
  • You need to spray 300 acres
  • 1 - How much of a spray mixture will you need?
  • 6000 gallons
  • You need to apply 2 oz / acre of Warrior 1E.
  • 2 - How much product do you put in tank?
  • 600 oz of Warrior

27
Questions Continued
  • 3 You have 20 nozzles and travel 204 in 25
    seconds.
  • -You collect 10 ounces in 25 seconds.
  • -What is your GPA?
  • 10 GPA

28
Question continued
  • You are trying to select a nozzle and it reads
    XR11004B.
  • 4 What type of nozzle is this?
  • Extended Range Flat Fan
  • 5 What angle of spray mist is emitted from
    these nozzles?
  • 110 degrees
  • 6 How low can you hold this boom at this spray
    angle?
  • 15 18
  • 7 How many gallons per minute does this nozzle
    emit at a standard pressure?
  • .4 Gallons Per Minute (standard 40 PSI)
  • 8 What material is this?
  • Brass
  • 9 What is the nozzle life of this nozzle?
  • Poor

29
Questions?
  • 10 What width and length would easily qualify
    for using the short cut 128th acre method for
    calibrating your backpack sprayer?

18 1/2 x 18 ½ feet
30
Questions
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