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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. . Application Methods. Broadcast. Multiple Nozzles Evenly spaced Equal Output. Even Pattern. Spot Treatment.

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the basic function of a sprayer
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.

backpack and hand sprayers

ATV’s?

What’s wrong with this picture?

Backpack and hand sprayers

What’s wrong with this picture?

slide7

Calibrating a Backpack/Spray Gun

18 ½ x 18 ½

Ounces = GPA

standardize pumping pressure
Standardize Pumping Pressure

http://www.rittenhouse.ca/

Nozzle Mount Pressure Regulator

$15.00 - $18.00

tanks
Tanks
  • Fiberglass
  • Stainless steel
  • Galvanized steel
  • Aluminum
  • Polyethylene
50 gpm for agitation 12 gpm for boom 62 gpm total pump requirement

Agitation

50 GPM for agitation12 GPM for Boom62 GPM total pump requirement

Agitation Requirement5% of tank volume(5 GPM for each 100 gallons)

1000 gallon tank

Pump - 50 GPM just for agitation

strainers
Strainers
  • Tank opening
    • Basket Strainer (16-80 mesh)
  • In-line (40-50 mesh)
  • Nozzle screen (50 - 100 mesh)
pumps must provide at least
PUMPS - must provide at least:
  • Gallons per minute (GPM) required by all nozzles
  • GPM - tank agitation (5 - 6 % of tank volume)
pump types
Pump Types
  • Roller
  • Centrifugal
  • Gear
  • Turbine
  • Diaphragm
  • Piston
positive displacement
Positive Displacement
  • General Purpose
  • Wide range
    • Output
    • Pressures
  • Herbicides
  • Rollers can wear

Roller Pump

non positive displacement
Non-positive Displacement
  • Continuous Flow
  • High RPM’s
  • Low Pressures
  • Durable
  • Easy to Maintain
  • Dry Formulations
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

Comparison of Micron Sizes(approximate)
what s a good gpa
What’s a good GPA?

Very Fine to Fine Droplet = Low Volume (GPA)

Medium to Coarse Droplets

Very Coarse = High Volume

three functions of a nozzle
Three Functions of a Nozzle
  • Metering - GPA
  • Atomization – Liquid to drops
  • Pattern dispersal
maximizing sprayer performance
MAXIMIZING SPRAYER PERFORMANCE
  • Nozzle materials
    • Stainless steel, brass and plastic are the most common.
    • Stainless steel is probably the best choice
volume of pesticide solution applied depends upon
VOLUME OF PESTICIDE SOLUTION APPLIED DEPENDS UPON:
  • NOZZLE TIPS - GPM
  • PRESSURE –Consistent, prevent drift
  • SPEED - MPH
  • NOZZLE SPACING - Uniformity
nozzle types
Nozzle Types

Flat fan - regular

Flat fan - extended range

Twin flat fan - good for

dense foliage

nozzle types31
Nozzle types

Even flat fan - band applications

Flooding flat fan

Hollow cone

Full cone

boom buster spray nozzles that work without booms
BOOM BUSTERSPRAY NOZZLES THAT WORK WITHOUT BOOMS
  • FEATURES
    • Machined from solid stainless steel. 
    • Replaceable nylon diffusers.
boom buster con t
Boom Buster (con’t)
  • Extra wide spray pattern.
  • Excellent pattern and distribution.
  • All models spray chemicals and fertilizers.
  • All nozzles have standard pipe threads.
how to change sprayer output
HOW TO CHANGE SPRAYER OUTPUT
  • NOZZLES
    • Best for large changes in output
how to change sprayer output37
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
how to change sprayer output38
HOW TO CHANGE SPRAYER OUTPUT
  • SPEED
    • Only feasible within a limited range of speeds
ground speed
Ground Speed
  • Cut speed by ½ =doubles output.

Double ground speed decreases output by ½