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Nozzles and Pumps

Nozzles and Pumps. NOZZLE TYPE. Flat fan Hollow cone Flood jet. FLAT FAN NOZZLE. FLAT FAN NOZZLE. HOLLOW CONE NOZZLE. FLOOD JET NOZZLE. FLOOD JET NOZZLE. NOZZLE MATERIAL. Very good chemical and wear resistance Ceramic, stainless steel. NOZZLE MATERIAL. Susceptible to damage

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Nozzles and Pumps

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  1. Nozzles and Pumps

  2. NOZZLE TYPE • Flat fan • Hollow cone • Flood jet

  3. FLAT FAN NOZZLE

  4. FLAT FAN NOZZLE

  5. HOLLOW CONE NOZZLE

  6. FLOOD JET NOZZLE

  7. FLOOD JET NOZZLE

  8. NOZZLE MATERIAL • Very good chemical and wear resistance • Ceramic, stainless steel

  9. NOZZLE MATERIAL • Susceptible to damage • Polymer (plastic)

  10. NOZZLE MATERIAL • Susceptible to wear and corrosion • Brass

  11. NOZZLE PERFORMANCE NOZZLE HEIGHT is determined by • Nozzle spacing • Nozzle spray angle

  12. NOZZLE PERFORMANCE OPERATING PRESSURE • PSI – pounds per square inch • Generally between 30 – 40 psi • Lower the psi the lower potential of drift

  13. DROPLET SIZE PRESSURE • Higher pressures create smaller droplets

  14. NOZZLE PERFORMANCE OVERLAP • 30% to 100% • Uniformity tapers at the edges of spray

  15. NOZZLE PERFORMANCE FLOW RATE • To double (2x) the flow rate, pressure must be quadrupled (4x) • higher pressure will • -Decrease droplet size • -Increase drift

  16. NOZZLE PERFORMANCE SPRAY ANGLE • pressure will affect spray angle • 8002 flat fan • 80 degree @ 40 psi • 65 degree @ 15 psi

  17. NOZZLE PERFORMANCE TIP WEAR • compare the flow to a new tip • replace when > 10% flow of new one • clean nozzles with soft bristled brush

  18. Worn nozzles New nozzles

  19. CAUSES OF DRIFT WIND VELOCITY • Early morning and early evening best times to spray • Use lower psi under windy conditions

  20. CAUSES OF DRIFT DROPLET SIZE • Smaller nozzle size and greater PSI create smaller drops

  21. CAUSES OF DRIFT SPRAY TIP HEIGHT • Greater the distance between nozzle and target • Greater wind velocity effect on drifting

  22. CAUSES OF DRIFT OPERATING SPEED • increased speeds cause upward wind currents increasing drift • Max speeds are 10 to 12 mph

  23. PUMPS POSITIVE DISPLACEMENT • piston • roller • diaphragm

  24. PUMPS NON-POSITIVE DISPLACEMENT • centrifugal

  25. PUMPS POSITIVE DISPLACEMENT • captures and discharges a fixed volume per stroke via roller, piston, or diaphragm • flow from the pump is proportional to the pump speed • must have a relief valve when nozzles turned off

  26. PUMPS NON-POSITIVE DISPLACEMENT • rotating impeller creates centrifugal force that discharges liquid through outlet • when nozzles closed, no relief valve needed, impeller spins harmlessly

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