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SELECTING SPRAY TIPS FOR APPLICATIONS TO TURF W. E. Hart and J. B. Wills – Biosystems Engineering and Environmental Science Department; T. J. Samples,

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Presentation on theme: "SELECTING SPRAY TIPS FOR APPLICATIONS TO TURF W. E. Hart and J. B. Wills – Biosystems Engineering and Environmental Science Department; T. J. Samples,"— Presentation transcript:

1 SELECTING SPRAY TIPS FOR APPLICATIONS TO TURF W. E. Hart and J. B. Wills – Biosystems Engineering and Environmental Science Department; T. J. Samples, J. C. Sorochan, J. S. McElroy and D. K. Robinson - Plant Sciences Department; and D. M. Shepard - Syngenta Professional Products

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4 Spray Tips Meter flow rate. Meter flow rate. Atomize liquid into droplets. Atomize liquid into droplets. Disperse droplets in a specific pattern. Disperse droplets in a specific pattern. Propel droplets to the turf surface. Propel droplets to the turf surface.

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6 Spray Tip Identification

7 VisiFlo ® Color Coding Standard

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9 There must be enough pressure to develop the pattern.

10 Spray Angle The actual spray width will be less than theoretical due to gravity. Minimum overlap is critical, maximum overlap is not. Minimum overlap is critical, maximum overlap is not. A 30 percent overlap is recommended for most tapered spray patterns. A 30 percent overlap is recommended for most tapered spray patterns. Avoid spray angle collapse when using drift retardants. Avoid spray angle collapse when using drift retardants.

11 1. Doubling the spraying pressure does not double the gallons per acre. 2. Spraying pressure must be increased 4 times to double flow through a spray tip. 3. As spraying pressure is increased, droplet size decreases and orifice wear increases. 4. Pressure should be used to make only small adjustments in output.

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13 Malvern Laser Analyzer

14 Cutting the Droplet Size in Half Produces Eight Times the Number of Droplets 500Microns500Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns 250 Microns

15 Droplet Size (micron) Droplets per square inch (20 GPA) 50 - Fog 180, – Very Fine 22, Fine Medium – Coarse – Extremely coarse 44 Number of Droplets per Sq. Inch When Applying 20 GPA Liquid A micron = 1/1,000 mm or 1/25,000 inch. A micron = 1/1,000 mm or 1/25,000 inch. If droplets are too small (e.g. < 150 microns in diameter), they can drift. If droplets are too small (e.g. < 150 microns in diameter), they can drift. Coverage can also be improved by increasing the spray volume. Coverage can also be improved by increasing the spray volume.

16 CategorySymbolColor CodeApproximate VMD (0.5) Very fineVFRed<150 microns FineFOrange150 – 250 MediumMYellow250 – 350 CoarseCBlue350 – 450 Very coarseVCGreen450 – 550 Extremely coarse XCWhite>550 Droplet Size Categories All spray tips produce a range of droplet sizes. VMD (volume mean diameter) = droplet size where ½ of volume has droplets > the VMD, and ½ the volume has droplets smaller than the VMD.

17 Droplet Size as Affected by Spraying Pressure Turbo TeeJet ® 1 bar = 15 PSI of pressure.

18 AI TeeJet ® TurfJet ™ Turbo TeeJet ® XRC ™ TwinJet ™ Multiple-Tip Nozzle Body

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20 XR TeeJet ® Flat Fan Coverage Syngenta sponsored research, Dr. Paul Vincelli, University of Kentucky, Yellow moisture-sensitive paper turns blue when moisture contacts paper. Excellent coverage. Compliments of Dr. Dennis Shepard, Syngenta

21 XRC Flat Fan Spray Tips Compliments of Dr. Dennis Shepard, Syngenta

22 XRC Flat Fan Spray Droplets Syngenta sponsored research, TeeJet ® and Dr. Mike Fidanza, Pennsylvania State University, Clear drops are dew; blue drops contain the fungicide Daconil. Excellent coverage. Compliments of Dr. Dennis Shepard, Syngenta

23 Effect of Pressure on Droplet Size XR & XRC TeeJet ® Colors in the left column refer to the VisiFlo color coding guide for spray tips.

24 Driftable Fine % at 40 psi: XR8004 = 5% (<150 Microns) XR11004 = 14% XR/XRC TeeJet ® Flat Fan Spray Tips

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26 Air Induction Spray Tips

27 AI TeeJet ® Spray Tips AI Spray Tips

28 Air Induction TeeJet ® Spray Tip Coverage Syngenta sponsored research, Dr. Paul Vincelli, University of Kentucky, Yellow moisture-sensitive paper turns blue when moisture contacts paper. Excellent coverage. Compliments of Dr. Dennis Shepard, Syngenta

29 AI/AIC TeeJet ® Spray Tips Driftable Fine % at 40 psi: AI11004VS = < 1% (<150 Microns)

30 TurfJet ™ Spray Tips Compliments of Dr. Dennis Shepard, Syngenta

31 TurfJet ™ Wide Angle Flat Spray Tips Integrated pre-orifice design allows for extremely coarse droplets for little to no drift. Patented turbulence chamber produces a wide angle flat fan spray pattern with an excellent spray distribution. Recommended spraying pressures are from 25 – 75 psi.

32 TurfJet Spray Tip Droplets TurfJet ™ Spray Tip Droplets Syngenta sponsored research, TeeJet and Dr. Mike Fidanza, Pennsylvania State University, Clear drops are dew; blue drops contain the fungicide Daconil. Fair coverage. Compliments of Dr. Dennis Shepard, Syngenta

33 TurfJet ™ Spray Tip Coverage Syngenta sponsored research, Dr. Paul Vincelli, University of Kentucky, Yellow moisture-sensitive paper turns blue when moisture contacts paper. Fair coverage. Compliments of Dr. Dennis Shepard, Syngenta

34 TurfJet ™ Wide Angle Flat Spray Nozzles Driftable Fine % at 40 psi: 1/4TTJ04-VS = < 1% (<150 Microns)

35 Raindrop Spray Tip Coverage Syngenta sponsored research with Dr. Paul Vincelli, University of Kentucky, Yellow moisture-sensitive paper turns blue when moisture contacts paper. Fair coverage. Compliments of Dr. Dennis Shepard, Syngenta

36 Turbo TeeJet ® Spray Tips

37 1 bar = 15 PSI of pressure.

38 Driftable Fine % at 40 psi: TT11004 = < 2% (<150 Microns) Turbo TeeJet ® Spray Tips

39 TurfJet ™ CoverageXRC TeeJet ® Flat Fan Coverage

40 Drift Potential

41 Spray Tip Fungicides ContactSystemic Air Induction TeeJet ® GoodExcellent TeeJet ® Standard FlatGood - ExcellentGood - Very Good Turbo TeeJet ® Wide Angle Flat Good - Very GoodVery Good - Excellent TurfJet ™ Wide Angle Flat Excellent TwinJet ™ Twin FlatExcellent XR TeeJet ® Extended Range Flat Good - ExcellentGood - Very Good

42 Spray Tip Herbicides ContactSystemic Air Induction TeeJet ® GoodExcellent TeeJet ® Standard FlatGood - ExcellentGood - Very Good Turbo TeeJet ® Wide Angle Flat Good - Very GoodVery Good - Excellent TurfJet ™ Wide Angle Flat Excellent TwinJet ™ Twin FlatExcellent XR TeeJet ® Extended Range Flat Good - ExcellentGood - Very Good

43 Spray Tip Insecticides ContactSystemic Air Induction TeeJet ® GoodExcellent TeeJet ® Standard FlatGood - ExcellentGood - Very Good Turbo TeeJet ® Wide Angle Flat Good - Very GoodVery Good - Excellent TurfJet ™ Wide Angle Flat Excellent TwinJet ™ Twin FlatExcellent XR TeeJet ® Extended Range Flat Good - ExcellentGood - Very Good

44 The authors wish to thank the Spraying Systems Co., P. O. Box 7900, Wheaton, IL for providing graphics and information.


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