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

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The Basic Function of a Sprayer:

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  1. 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.

  2. Application Methods Broadcast

  3. Multiple NozzlesEvenly spacedEqual Output Even Pattern

  4. Spot Treatment

  5. Types of Spray Equipment--Spot Treatment -- ATV Knapsack Hand sprayer

  6. ATV’s? What’s wrong with this picture? Backpack and hand sprayers What’s wrong with this picture?

  7. Calibrating a Backpack/Spray Gun 18 ½ x 18 ½ Ounces = GPA

  8. Standardize Pumping Pressure http://www.rittenhouse.ca/ Nozzle Mount Pressure Regulator $15.00 - $18.00

  9. Injector Systems

  10. Tanks • Fiberglass • Stainless steel • Galvanized steel • Aluminum • Polyethylene

  11. Agitation

  12. 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

  13. Strainers • Tank opening • Basket Strainer (16-80 mesh) • In-line (40-50 mesh) • Nozzle screen (50 - 100 mesh)

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

  15. Pump Types • Roller • Centrifugal • Gear • Turbine • Diaphragm • Piston

  16. Positive Displacement • General Purpose • Wide range • Output • Pressures • Herbicides • Rollers can wear Roller Pump

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

  18. 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)

  19. What’s a good GPA? Very Fine to Fine Droplet = Low Volume (GPA) Medium to Coarse Droplets Very Coarse = High Volume

  20. Read them labels!!

  21. Three Functions of a Nozzle • Metering - GPA • Atomization – Liquid to drops • Pattern dispersal

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

  23. Nozzles: Wear vs Cost

  24. VOLUME OF PESTICIDE SOLUTION APPLIED DEPENDS UPON: • NOZZLE TIPS - GPM • PRESSURE –Consistent, prevent drift • SPEED - MPH • NOZZLE SPACING - Uniformity

  25. Nozzle Types Flat fan - regular Flat fan - extended range Twin flat fan - good for dense foliage

  26. Nozzle Orientation

  27. Nozzle types Even flat fan - band applications Flooding flat fan Hollow cone Full cone

  28. Flood Jet

  29. BOOM BUSTERSPRAY NOZZLES THAT WORK WITHOUT BOOMS • FEATURES • Machined from solid stainless steel.  • Replaceable nylon diffusers.

  30. Roadside Spray Boom

  31. Boom Buster (con’t) • Extra wide spray pattern. • Excellent pattern and distribution. • All models spray chemicals and fertilizers. • All nozzles have standard pipe threads.

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

  33. 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

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

  35. Ground Speed • Cut speed by ½ =doubles output. Double ground speed decreases output by ½

  36. That's All ?

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