TeeJet Spray Tip Selection User Guide

TeeJet Spray Tip Selection

INTRODUCTION TO TARGET SPRAY

• Target spray technology, particularly using green-on-brown or green-on-green systems, is designed to significantly reduce the amount of herbicide applied in an area, potentially achieving up to a 95% reduction compared to traditional broadcast sprayers. This reduction in herbicide usage not only benefits the environment but also minimizes costs for farmers and promotes more sustainable agriculture. The selection of appropriate spray tips is crucial in optimizing the performance of these systems.
• There are two main approaches to activating spray tips in target spray technology:
• Multiple Spray Tip Activation: Systems that utilize multiple spray tips activated at different times and locations based on weed detection rely on spray tips with tapered spray patterns for precise application. These spray tips are designed to deliver a pattern with a concentrated volume at the center, gradually tapering off toward the edges. This ensures overlapping spray patterns that provide uniform herbicide distribution across the target area. While boom height does not influence the pesticide dose, it plays a critical role in determining the distribution uniformity and minimizing spray drift.
• Single Spray Tip Activation: The use of even tips for uniform spray application under one unique tip is crucial for precise herbicide delivery. Even application helps to maximize the effectiveness of the herbicide and minimize the risk of under – or over – application. However, the boom height directly impacts the band width where the herbicide is applied which will directly impact on the applied dose. Consistent and accurate boom heights are essential to ensure proper dose application and minimize spray drift.
• Regardless of whether the equipment utilizes a single or multiple spray tip activation, it’s essential to calibrate the system to ensure the best performance and savings in weed control. Calibration ensures that the right amount of  herbicide is delivered to the target area without over-spraying or under-spraying.
• TeeJet offers a wide selection of spray tips, boom components and controllers that are suitable for target spray applications. When choosing the right spray tips, factors like droplet size, flow rate, and spray angle are essential to  consider, as they directly impact the precision and effectiveness of herbicide application.
• You will find in this TeeJet Spray Selection Guide for Target Spray Application a selection of spray tips that best suit these applications. The guide provides information on different spray tip options and their characteristics, helping users make informed choices based on factors like droplet size, flow rate, spray angle, and other considerations.

SELECT THE SPRAY TIP THAT MOST FITS YOUR APPLICATION

Note: Consult the crop protection product label for specific rate and application recommendations. Droplet size categories shown are based on ISO 25358.

•  (VF) Very Fine,
• (F) Fine,
• (M) Medium,
• (C) Coarse,
• (VC) Very Coarse,(XC) Extremely Coarse,(UC) Ultra Coarse.

CALCULATE THE CORRECT SPRAY TIP CAPACITY

To determine the right capacity, you must know the work speed, application rate, and spray tip spacing or band width, based on if you will use a tapered or even spray tip.

Examples:

• For Tapered spray tips – Multiple spray tips activation
• Formula: l/min = I/ha x km/h x W = 120 x 20 x 40 = 1.6 l/min (04 tip @ 3.1 bar) 60,000 60,000 where l/ha is the application rate, km/h is the operating speed, W is the spray tip spacing (cm) on the boom, and 60,000 is the conversion factor.
• For Even spray tips – Single spray tip activation
• Formula: l/min = l/ha x km/h x W = 120 x 20 x 63.7 = 2.54 l/min (06 tip @ 3.5 bar) 60,000 60,000 where l/ha is the application rate, km/h is the operating speed, W is the spray tip band width (cm), and 60,000 is the conversion factor DGX-SS

If you are using a single tip, to find the lha on the spray band, multiply the tabulated l/ha from the spray tip page for row spacing by the conversion factors below.

Width (cm) Height (cm) l/ha Conversion

• Factors*40° 65° 80° 25 cm spacing 40 cm spacing 50 cm spacing
• 7.5 10 5 5 3.33 5.33 6.67
• 15 15 12 8 1.67 2.67 3.33
• 20 27 16 12 1.25 2.00 2.50
• 25 34 20 15 1.00 1.60 2.00
• 30 41 24 18 0.83 1.33 1.67
• 40 55 31 24 0.63 1.00 1.25
• 50 69 39 30 0.50 0.80 1.00

Example:
Spray tip spacing: 25 cm Band width = 20 cm (conversion factor = 1.25) TP6503E-SS at 3 bar at 10 km/h = 142 l/ha Corrected l/ha = 142 x 1.25 = 177.5 l/ha

SELECT THE ADEQUATE NOMINAL ANGLE FOR THE SPRAY TIP

• Different target spray technologies come with different boom configurations in spray tip spacing and orientation, factors that will impact on the selection of the best angle for the tip. If you are replacing the spray tips on your machine, follow the sprayer manufacturer’s recommendations. If you are looking for how to select the proper nominal angle, follow the upcoming steps.
• The table below lists the theoretical band width of spray patterns as calculated from the nominal spray angle of the spray and the distance from the tip orifice. These values are based on the assumption that the spray angle remains the same throughout the entire spray distance.
• If the desired spray height is not listed at this table, you can find the boom height by selecting an existing tip angle and calculating the boom height by :

THEORETICAL COVERAGE

INCLUDED SPRAY ANGLE

THEORETICAL COVERAGE AT VARIOUS SPRAY HEIGHTS

• 20 cm 30 cm 40 cm 50 cm 60 cm 70 cm 80 cm 90cm
• 15° 5.3 7.9 10.5 13.2 15.8 18.4 21.1 23.7
• 20° 7.1 10.6 14.1 17.6 21.2 24.7 28.2 31.7
• 25° 8.9 13.3 17.7 22.2 26.6 31.0 35.5 39.9
• 30° 10.7 16.1 21.4 26.8 32.2 37.5 42.9 48.2
• 35° 12.6 18.9 25.2 31.5 37.8 44.1 50.5 56.8
• 40° 14.6 21.8 29.1 36.4 43.7 51.0 58.2 65.5
• 45° 16.6 24.9 33.1 41.4 49.7 58.0 66.3 74.6
• 50° 18.7 28.0 37.3 46.6 56.0 65.3 74.6 83.9
• 55° 20.8 31.2 41.7 52.1 62.5 72.9 83.3 93.7
• 60° 23.1 34.6 46.2 57.7 69.3 80.8 92.4 104
• 65° 25.5 38.2 51.0 63.7 76.5 89.2 102 115
• 73° 29.6 44.4 59.2 74.0 88.8 104 118 133
• 80° 33.6 50.4 67.1 83.9 101 118 134 151

THEORETICAL COVERAGE

• The proper theoretical band width is subject to change based on factors like operating pressure, tip nominal angle, and boom height. This aspect becomes even more critical when considering single tip activation or even tips, as the correct band width is essential for delivering the appropriate crop protection product dose.
• In the example below, we can compare the applied dose of a tapered and even spray tip with a 65º angle at the same boom height. Using the same parameters from page 2, for the overlapping tips (tapered), the applied volume rate is calculated using the spray tip spacing of 40 cm resulting in an application rate of 1.6 l/min for the tip. When calculating the flow rate parameters for systems with a single spray tip activation, ensure that the spray tip’s band width is used as the “w” value in the equation. Using the same 65° spray tip example, at a 50 cm height provides a theoretical band width of 63.7 cm. Based on this, the correct calculated capacity for the spray tip would be 2.54 l/min (using an 06 tip at 3.5 bar), rather than 1.6 l/min, where you would be under-applying by 0.94 l/min .
• In the case of multiple tip activation with tapered spray tips, it is strongly suggested to have a minimum overlap of 100%* to guarantee the accurate delivery of the recommended dose.
• When it comes to single tip activation with even spray tips, the general recommendation is to avoid any overlap. However, in practice, it’s observed that the edges of even tips may carry less volume. Therefore, a 20% overlap is suggested when more than one tip is activated side by side simultaneously. This slight overlap compensates for the uneven distribution at the edges and helps maintain consistent coverage when using even spray tips. But before  deciding if an overlap is needed or not for even spray tips, talk to a Teele representative to assist you and understand how you can optimize your application.

If you use the same spray tip capacity as calculated for a broadcast application for a single spray tip activation, you are under spraying the recommended dose. Let’s consider as an example the recommended dose as 120 1/ha.

• l/ha= = 75 1/ha X
• l/ha = (2.54x x 63.7) = 120 1/ha

Spray tips should be positioned to achieve 100% pattern overlap, with the edge of each spray pattern aligning at the center of the adjacent nozzle

REDUCED DRIFT SPRAY TIP WITH SUPERIOR COVERAGE
The DGX65 is the first spray tip in our line of X Series Target Spray tips. It is designed specifically for precise application and exceptional coverage in target spraying applications. The DGX is now available in a 40° and 65° spray angle with a tapered spray pattern, in 4 capacity sizes, 03-06. The DGX is excellent for herbicide applications in target spraying and is highly versatile. *

FEATURES & BENEFITS

• Designed for multi-nozzle broadcast target spray applications
• Pre-orifice design with VisiFlo® color coding produces large droplets to reduce drift
• DGX TeeJet Drift Guard tips reduce small drift prone droplets, minimizing off target spray contamination
• Increased droplet size compared to the standard DG nozzle

DGX SPRAY APPLICATION CHARTS

Note: Always double check your application rates. Droplet size classification shown is based on ISO 25358. Droplet size classification standard is subject to changes. Tabulations are based on spraying water at 70°F (21°C).

REDUCED DRIFT SPRAY TIP WITH SUPERIOR COVERAGE

• Can be used for contact and systemic herbicide applications that require medium to very coarse droplet size.
• Available in 30°, 40°, 65° and 80° tapered spray angles ideal for target spray application.*

FEATURES & BENEFITS
Pre-orifice design produces larger droplets and reduces the small drift-prone droplets, minimizing off-target spray contamination

• Tapered edge flat spray pattern provides uniform coverage when adjacent nozzle patterns are overlapped
• Stainless steel with VisiFlo® color-coding and Stainless Steel

For more information about our products, please check the complete catalog on our website www.teejet.com/target-spray

DG SPRAY APPLICATION CHARTS

TP TEEJET® FLAT SPRAY TIPS MULTIPURPOSE SPRAY TIP FOR WHEN COVERAGE IS CRITICAL
A wide range of capacities and spray angles are available to meet your spray volume and droplet size requirements, ensuring optimal performance across various spray boom configurations. Available in 15°, 25°, 30°, 40°, 65°, and 80° spray angles, featuring both tapered and even spray patterns.*

FEATURES & BENEFITS

• Fast Pattern Formation – Faster pattern establishment saves time during spraying operations
• Precision application reduces the need for repeat passes, conserving resources
• High-Quality Stainless Steel provides reliable performance, even under demanding conditions
• Uniform spray patterns ensure even coverage, boosting effectiveness in targeted applications
• Available with Stainless steel and polymer holder with VisiFlo color-coding , VisiFlo® color-coding in stainless steel or all stainless steel

For more information about our products, please check the complete catalog on our website www.teejet.com/target-spray

TP SPRAY APPLICATION CHARTS

• 2.0 M M 0.65 390 260 195 156 130 97.5 244 163 122 97.5 81.3 60.9
• 3.0 M M 0.79 474 316 237 190 158 119 296 198 148 119 98.8 74.1
• 4.0 F F 0.91 546 364 273 218 182 137 341 228 171 137 114 85.3 03 (50)
• 2.0 C C 0.96 576 384 288 230 192 144 360 240 180 144 120 90.0
• 3.0 M M 1.18 708 472 354 283 236 177 443 295 221 177 148 111
• 4.0 M M 1.36 816 544 408 326 272 204 510 340 255 204 170 128 04 (50)
• 2.0 C C 1.29 774 516 387 310 258 194 484 323 242 194 161 121
• 3.0 M C 1.58 948 632 474 379 316 237 593 395 296 237 198 148
• 4.0 M M 1.82 1092 728 546 437 364 273 683 455 341 273 228 171 05 (50)
• 2.0 VC VC 1.61 966 644 483 386 322 242 604 403 302 242 201 151
• 3.0 C C 1.97 1182 788 591 473 394 296 739 493 369 296 246 185
• 4.0 M M 2.27 1362 908 681 545 454 341 851 568 426 341 284 213
• 2.0 M F 0.65 390 260 195 156 130 97.5 244 163 122 97.5 81.3 60.9
• 3.0 F F 0.79 474 316 237 190 158 119 296 198 148 119 98.8 74.1
• 4.0 F F 0.91 546 364 273 218 182 137 341 228 171 137 114 85.3 03 (50)
• 2.0 M M 0.96 576 384 288 230 192 144 360 240 180 144 120 90.0
• 3.0 M M 1.18 708 472 354 283 236 177 443 295 221 177 148 111
• 4.0 F M 1.36 816 544 408 326 272 204 510 340 255 204 170 128 04 (50)
• 2.0 C C 1.29 774 516 387 310 258 194 484 323 242 194 161 121
• 3.0 M M 1.58 948 632 474 379 316 237 593 395 296 237 198 148
• 4.0 M M 1.82 1092 728 546 437 364 273 683 455 341 273 228 171 05 (50)
• 2.0 C C 1.61 966 644 483 386 322 242 604 403 302 242 201 151
• 3.0 M M 1.97 1182 788 591 473 394 296 739 493 369 296 246 185
• 4.0 M M 2.27 1362 908 681 545 454 341 851 568 426 341 284 213 06 (50)
• 2.0 C C 1.94 1164 776 582 466 388 291 728 485 364 291 243 182
• 3.0 C M 2.37 1422 948 711 569 474 356 889 593 444 356 296 222
• 4.0 M M 2.74 1644 1096 822 658 548 411 1028 685 514 411 343 257

• 2.0 M M 0.65 244 163 122 97.5 81.3 60.9 195 130 97.5 78.0 65.0 48.8
• 3.0 F F 0.79 296 198 148 119 98.8 74.1 237 158 119 94.8 79.0 59.3
• 4.0 F F 0.91 341 228 171 137 114 85.3 273 182 137 109 91.0 68.3 03
• 2.0 M M 0.96 360 240 180 144 120 90.0 288 192 144 115 96.0 72.0
• 3.0 M F 1.18 443 295 221 177 148 111 354 236 177 142 118 88.5
• 4.0 F F 1.36 510 340 255 204 170 128 408 272 204 163 136 102 04
• 2.0 M M 1.29 484 323 242 194 161 121 387 258 194 155 129 96.8
• 3.0 M M 1.58 593 395 296 237 198 148 474 316 237 190 158 119
• 4.0 M F 1.82 683 455 341 273 228 171 546 364 273 218 182 137 05
• 2.0 M M 1.61 604 403 302 242 201 151 483 322 242 193 161 121
• 3.0 M M 1.97 739 493 369 296 246 185 591 394 296 236 197 148
• 4.0 M M 2.27 851 568 426 341 284 213 681 454 341 272 227 170 06 (50)
• 2.0 C C 1.94 728 485 364 291 243 182 582 388 291 233 194 146
• 3.0 M M 2.37 889 593 444 356 296 222 711 474 356 284 237 178
• 4.0 M M 2.74 1028 685 514 411 343 257 822 548 411 329 274 206

AI TEEJET® AIR INDUCTION FLAT SPRAY TIPS PERFECT SPRAY DISTRIBU-TION WITH SUPERIOR DRIFT CONTROL
Available in 80° tapered and 65° even spray angles ideal for target spray application.*

FEATURES & BENEFITS

• Produces larger droplets, significantly minimizing drift and keeping spray on target
• Air-filled droplets, due to the Venturi system, improve coverage efficiency, ensuring consistent application without compromising efficacy
• Minimizes chemical loss due to drift, saving costs and reducing environmental impact
• Available in stainless steel insert, polymer holder  and pre-orifice with VisiFlo® color-coding

Note: Always double check your application rates. Droplet size classification shown is based on ISO 25358. Droplet size classification standard is subject to changes. Tabulations are based on spraying water at 70°F (21°C)

HOW TO ORDER

TEEJET NOZZLE BODIES & ACCESORIES

Dynojet valves are a solenoid-actuated shutoff compatible with a wide range of Teele® nozzle bodies equipped with a diaphragm check valve. It is primarily intended to use with PWM control systems. Ecostop valve is designed for tip shutoff in individual nozzle control applications, such as Target Spraying.

For more details, see the latest TeeJet Catalog or visit www.teejet.com

QJ30 QUICK TEEJET® 30° OUTLET ADAPTER

• Optimized flow passage for improved spray tip shutoff performance and clean out
• Nylon body construction for strength and durability, with EPDM gasket (FKM Optional)
• Lugs are designed to maintain parallel alignment of spray pattern and the boom
• Fits standard Quick TeeJet nozzle bodies for easy use
• Maximum pressure: 20 bar

Additional capacities and spray angles may be available. Contact your TeeJet representative for more information

SPRAY TIPS AVAILABLE FOR TARGET SPRAY APPLICATION

TAPERED

EVEN

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