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Equipment Selection & Application Methods

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For Missoula. Feb 4, 2005 ... Methods The Basic Function of a Sprayer: Distribution & Metering Apply a dilute amount of herbicide (Rate) in a determined volume of ... – PowerPoint PPT presentation

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Title: Equipment Selection & Application Methods


1
Equipment
Methods
2
The Basic Function of a Sprayer
  • Distribution Metering
  • Apply a dilute amount of herbicide (Rate) in a
    determined volume of water (GPA) to a known area.

3
Application Methods
Broadcast
4
Even Pattern
5
Spot Treatment
6
Types of Spray Equipment --Spot Treatment --
ATV
Knapsack
Hand sprayer
7
Backpack and hand sprayers
Whats wrong with this picture?
8
Calibrating a Backpack/Spray Gun
18 ½ x 18 ½
Ounces GPA
9
Standardize Pumping Pressure
http//www.rittenhouse.ca/
Nozzle Mount Pressure Regulator
15.00 - 18.00
10
Injector Systems
11
Tanks
  • Fiberglass
  • Stainless steel
  • Galvanized steel
  • Aluminum
  • Polyethylene

12
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13
Agitation
14
50 GPM for agitation 12 GPM for Boom 62 GPM total
pump requirement
Agitation
  • Agitation Requirement 5 of tank volume (5 GPM
    for each 100 gallons)

1000 gallon tank Pump - 50 GPM just for agitation
15
Strainers
  • Tank opening
  • Basket Strainer (16-80 mesh)
  • In-line (40-50 mesh)
  • Nozzle screen (50 - 100 mesh)

16
PUMPS - must provide at least
  • Gallons per minute (GPM) required by all nozzles
  • GPM - tank agitation (5 - 6 of tank volume)

17
Pump Types
  • Roller
  • Centrifugal
  • Gear
  • Turbine
  • Diaphragm
  • Piston

18
Positive Displacement
  • General Purpose
  • Wide range
  • Output
  • Pressures
  • Herbicides
  • Rollers can wear

Roller Pump
19
Positive Displacement
  • High Pressure
  • Volume depends on RPMs
  • Insecticides
  • Dry Formulations
  • Part can wear

Piston
20
Positive Displacement
  • High Pressure
  • High Volume
  • Insecticides
  • Herbicides
  • Dry Formulations
  • Part can wear

Diaphragm
21
Non-positive Displacement
  • Continuous Flow
  • High RPMs
  • Low Pressures
  • Durable
  • Easy to Maintain
  • Dry Formulations

22
Pump requirement (GPM)
  • Desired GPA x Boom Width x MPH 495

For Boom Flow only
23
Example
  • 30 GPA x 40 feet x 5 MPH 495
  • 12 GPM

24
Pressure
  • Least desirable to adjust GPA
  • 4 x pressure to double GPA
  • 20 GPA at 30 psi
  • 40 GPA at 120 psi

Small droplets DRIFT
  • Minor tweeks!

25
Hoses
  • Flexible (non-collapsible if suction hose)
  • Durable
  • Resistant (sunlight, oil, chemicals, abrasion,
    twisting)
  • Sufficient Pressure Rating
  • Correct size

26
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27
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28
Comparison of Micron Sizes (approximate)
  • 2000 ?m - 2 Pencil lead
  • 850 ?m - paper clip
  • 420 ?m staple
  • 300 ?m - toothbrush bristle
  • 150 ?m - sewing thread
  • 100 ?m - human hair

29
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30
Whats a good GPA?
Very Fine to Fine Droplet Low Volume (GPA)
Medium to Coarse Droplets
Very Coarse High Volume
31
Read them labels!!
32
Three Functions of a Nozzle
  • Metering - GPA
  • Atomization Liquid to drops
  • Pattern dispersal

33
MAXIMIZING SPRAYER PERFORMANCE
  • Nozzle materials
  • Stainless steel, brass and plastic are the most
    common.
  • Stainless steel is probably the best choice

34
Nozzles Wear vs Cost
35
VOLUME OF PESTICIDE SOLUTION APPLIED DEPENDS UPON
  • NOZZLE TIPS - GPM
  • PRESSURE Consistent, prevent drift
  • SPEED - MPH
  • NOZZLE SPACING - Uniformity

36
TeeJet nozzle tip examples
37
NOZZLE TIP DESIGNATIONS SPRAYING SYSTEMS CO.
  • 11004
  • 110 DEGREE SPRAY ANGLE
  • 04 0.4 GALLON PER MINUTE AT 40 PSI
  • VS Stainless Steel Insert and VisiFlow color

38
Nozzle Types
Flat fan - regular
Flat fan - extended range
Twin flat fan - good for dense foliage
39
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40
Nozzle Orientation
41
Nozzle types
Even flat fan - band applications
Flooding flat fan
Hollow cone
Full cone
42
Flood Jet
43
BOOM BUSTER SPRAY NOZZLES THAT WORK WITHOUT BOOMS
  • FEATURES
  • Machined from solid stainless steel. 
  • Replaceable nylon diffusers.

44
Roadside Spray Boom
45
Boom Buster (cont)
  • Extra wide spray pattern.
  • Excellent pattern and distribution.
  • All models spray chemicals and fertilizers.
  • All nozzles have standard pipe threads.

46
CHOOSING THE RIGHT NOZZLE SIZE
  • GPM GPA x MPH x W 5940
  • GPM Gallons per minute per nozzle
  • GPA Gallons per acre
  • MPH Miles per hour
  • W Nozzle spacing (in.) Broadjet width (in.)

47
EXAMPLE
  • GPA 30
  • MPH 4
  • Nozzle spacing 20
  • GPM 30 GPA x 4 MPH x 20 in 2400 5940
    5940
  • GPM 0.40 per nozzle

48
HOW TO CHANGE SPRAYER OUTPUT
  • NOZZLES
  • Best for large changes in output

49
HOW TO CHANGE SPRAYER OUTPUT
  • Pressure
  • Only feasible within a limited pressure range
  • Pressure must be increased by a factor of 4 in
    order to double the flow
  • 10 GPA at 20 PSI
  • 20 GPA at 80 PSI

50
HOW TO CHANGE SPRAYER OUTPUT
  • SPEED
  • Only feasible within a limited range of speeds

51
Ground Speed
Cut speed by ½ doubles output.
Double ground speed decreases output by ½
52
Verifying Speed Page 95
  • Make a test strip to verify MPH
  • Feet x 60 . Seconds x 88
  • Feet per second x 0.682
  • At 1 MPH, it takes 1 minute to travel 88 feet

53
Speed
  • Test Strip Distance 200 feet
  • Seconds to travel strip 27 seconds

(200 / 27 seconds) x 0.682
5 MPH
54
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55
That's All
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