Liquid Output When Using Drop Pipes

In the case of manual spraying, the spraying pressure must be adjusted as follows in order to spray a specific quantity in liters/hectare:

1. In the spray volume table (see "Adjusting the nozzle output" in this section), find the output per nozzle in l/min, at the desired application rate per hectare.

2. Find the spraying pressure in the table with which this output is obtained for the fitted nozzle.

3. Multiply the spraying pressure found with the density of the liquid (for AHL 1.28 kg/l). Determine the density by weighing exactly 1 liter.

4. Determine the pressure loss (see "Adjusting the nozzle output" in this section) between pressure gauge and the pressure piece on the drop pipe with the liquid fertilizer. The pressure loss is also dependent on the liquid viscosity.

When working with a spraying computer, the liquid output can be set to working with liquid fertilizers as described in the relevant section. If the computer works with a pressure sensor, the density correction factor must be programmed and activated. If the computer works with a flow sensor, no correction is necessary for the application rate control, but necessary for displaying the correct (calculated) liquid pressure.

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Spraying table FloodJet nozzles for drop pipes

    Nozzle output Dosage in l AHL/ha
(nozzle spacing 50 cm)
Nozzle Press.
(bar)		 Water
(l/min)		 AHLa
(l/min)		 6
km/h		 7
km/h		 8
km/h		 9
km/h		 10
km/h
TF-VP2 1.0 0.91 0.81 162 139 122 108 97
(red) 1.5 1.11 0.98 196 168 147 131 118
  2.0 1.29 1.14 228 195 171 152 137
  2.5 1.44 1.27 254 218 191 169 152
  3.0 1.58 1.40 280 240 210 187 168
TF-VP2,5 1.0 1.14 1.01 202 173 152 135 121
(brown) 1.5 1.40 1.24 248 213 186 165 149
  2.0 1.61 1.42 284 243 213 189 170
  2.5 1.80 1.59 318 273 239 212 191
  3.0 1.97 1.74 348 298 261 232 209
TF-VP3 1.0 1.37 1.21 242 207 182 161 145
(grey) 1.5 1.68 1.49 298 255 224 199 179
  2.0 1.94 1.72 344 295 258 229 206
  2.5 2.17 1.92 384 329 288 256 230
  3.0 2.37 2.10 420 360 315 256 252
TF-VP4 1.0 1.82 1.61 322 276 242 215 193
(white) 1.5 2.23 1.97 394 338 296 263 236
  2.0 2.57 2.27 454 389 341 303 272
  2.5 2.88 2.55 510 437 383 340 306
  3.0 3.15 2.79 558 478 419 372 335
TF-VP5 1.0 2.28 2.02 404 346 303 269 242
(light blue) 1.5 2.79 2.47 494 423 371 329 296
  2.0 3.22 2.85 570 489 428 380 342
  2.5 3.60 3.19 638 547 479 425 383
  3.0 3.95 3.50 700 600 525 467 420
TF-VP7,5 1.0 3.42 3.03 606 519 455 404 364
(light green) 1.5 4.19 3.71 742 636 557 495 445
  2.0 4.83 4.27 854 732 641 569 512
  2.5 5.41 4.79 958 821 719 639 575
  3.0 5.92 5.24 1048 898 786 699 629
TF-VP10 1.0 4.56 4.04 808 693 606 539 485
(black) 1.5 5.58 4.94 988 847 741 659 593
  2.0 6.45 5.71 1142 979 857 761 685
  2.5 7.21 6.38 1276 1094 957 851 766
  3.0 7.90 6.99 1398 1198 1049 932 839
aAHL = Ammonium Harnstoff Lösung, density = 1.28 kg/l, concentration 28 wght.- %

 

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