5 - Operation
119
Liquid Fertilizer
Spraying Pressure
If you are spraying with liquid fertilizer instead of pesticides, the spraying pressure must be increased in comparison to
pesticide spraying to get the desired output (l/ha).
The specific gravity for liquid fertilizer is normally higher than for water and spray liquids - so to get the correct output (l/ha),
the spraying pressure must be adjusted.
Example:
Nozzle output is 2.40 l/Min at 3.0 bar pressure. Specific gravity of liquid fertilizer is 1.20 g/cm³.
Multiply the pressure value with the specific gravity value: 3.0 x 1.20 = 3.6.
The adjusted pressure is now 3.6 bar for spraying the liquid fertilizer.
In the table below, adjusted pressure values can be found for different specific gravities of liquid fertilizers.
μ
ATTENTION! Pressure values below 1.5 bar or above 5.0 bar are considered to be out of range for the nozzles.
÷
NOTE! Find the specific gravity for your liquid fertilizer on the packaging or on the material safety data sheet (MSDS)
included.
TankGauge in MainTank
When the MainTank is filled with liquid fertilizers that has higher specific gravity, the TankGauge may show incorrect values.
Therefore the specific gravity for the TankGauge need to be corrected.
1.
In the controller, go to menu [3.5.1 Adjustment of specific gravity].
2.
Set specific gravity.
3.
Press Enter to confirm.
Additional Information
See the other book delivered from HARDI - Spray Technique - to get further information about:
•
Calibration of the sprayer
•
Nozzle Choice
•
Nozzle Wear
•
Spray Distribution
•
Spray Pressure
•
Water Volume Rates
•
Weather Influence on Spraying
•
Useful Formulae
For optional equipment - see other books delivered or contact HARDI.
Specific gravity (g/cm³) for Liquid Fertilizer
1.10
1.15
1.20
1.30
1.40
Calibrated Pressure (bar) when Spraying with
Pesticides
Adjusted Pressure (bar) when Spraying with Liquid Fertilizer
1.5
1.7
1.7
1.8
2.0
2.1
2.0
2.2
2.3
2.4
2.6
2.8
2.5
2.8
2.9
3.0
3.3
3.5
3.0
3.3
3.5
3.6
3.9
4.2
3.5
3.9
4.0
4.2
4.6
4.9
4.0
4.4
4.6
4.8
5.2
5.6
4.5
5.0
5.2
5.4
5.9
6.3
5.0
5.5
5.8
6.0
6.5
7.0
Summary of Contents for NAVIGATOR VPZ
Page 4: ...1 EU Declaration 4...
Page 72: ...3 Description 72...
Page 135: ...6 Maintenance 135 Lubrication Plan Boom Wings 10...
Page 174: ...6 Maintenance 174...
Page 182: ...7 Fault Finding 182...
Page 195: ...8 Technical Specifications 195 Hydraulic Diagrams Hydraulics for Boom of 21 24 Meters...
Page 196: ...8 Technical Specifications 196 Hydraulics for Boom of 27 28 Meters...
Page 198: ...8 Technical Specifications 198...
Page 204: ...HARDI INTERNATIONAL A S Herthadalvej 10 DK 4840 N rre Alslev DENMARK...
