Ratio of Liquid/Air Pressure for the Standard Droplet Sizes

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A-Air pressure (bar)
B-Liquid pressure (bar)


1-Very fine (VF)
2-Fine (F)


3-Medium (M)


4-Coarse (C)

TwinFluid™ TKSS10/035

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A-Air pressure (bar)
B-Liquid pressure (bar)


1-Very fine (VF)
2-Fine (F)


3-Medium (M)


4-Coarse (C)

TwinFluid™ TKSS10/042
Choice of droplet size

Prior to spraying, a spray quality (droplet size) and application rate must be chosen. The droplet size and application rate can be set in the 'Sprayer - Main' page and 'Job Settings' respectively on the GreenStar 2™ display, based on a wind speed measurement. If the machine is stationary, the driver can do a wind measurement via the 'Job Settings' on the GreenStar 2 1 display. The controller then measures the wind speed for a certain length of time (standard 30 seconds) and then calculates the average value.

This value is then displayed on the screen and the controller will give an advice on the droplet size to be

set. If the "Do not spray", "Too much wind" message appears on the screen, the wind speed is too great for spraying purposes. Regardless of the advice given by the controller, the driver can still choose a different position (droplet size) if he wishes.

Choice of application rate

The application rate in l/ha must be set in the 'Job Settings' on the GreenStar 2 display. The liquid output of the TwinFluid™ nozzles depends on the air and liquid pressure. The liquid output for the standard TwinFluid 2 version with 035 insert and TK-SS10 flow tip is given in "Liquid Output for TwinFluid Nozzles" in the "Working with the Machine" section.

1GreenStar 2 is a trademark of Deere & Company

2TwinFluid is a trademark of Deere & Company

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Application rate for 035 Inserts
Pos. Output in L/min l/ha at 6 km/h l/ha at 8 km/h
VF 0.46-0.65 92- 147 69- 98
F 0.49-0.71 111-161 74-107
M 0.57-0.89 129-201 86-134
C 0.53-1.00 120-225 80-150

 

Application rate for 042 Inserts
Pos. Output in L/min l/ha at 6 km/h l/ha at 8 km/h
VF 0.30-0.68 68-153 45-102
F 0.51-0.95 116-215 77-143
M 0.59-1.05 133-237 89-158
C 0.67-1.04 152-234 101-156

 

A lower liquid output can be set for a finer droplet size than for a coarser droplet. After all, a fine droplet gives the same degree of coverage at a lower liquid output (no. of droplets / cm 2 ) as a coarser droplet with a higher application rate. We therefore advise the

programming of the following standard setting, based on a driving speed of 6 km/h:

Spray quality l/ha at 6 km/h
Very fine spray quality 100
Fine spray quality 125
Medium spray quality 150
Coarse spray quality 200

 

The combination of droplet size and liquid output determines the degree of coverage. Lower volumes can be sprayed using a finer droplet, a higher liquid output is advised for a coarser droplet in order to compensate the degree of cover as far as possible. Of course, a higher output with a finer droplet gives an even better degree of cover.

Our advice is to carry out spraying work which requires intensive coverage with a fine or very fine droplet where possible (e.g. position VF or F on the GreenStar 2 display).

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