59
The choice of nozzles (step 5 below) will influence
decisions re the Sprayer’s Tier configuration.
STEP 5 - DETERMINE THE IDEAL
SPRAY PRESSURE
Before determining the correct nozzles, it’s best to have
an idea of the spray pressure required. Croplands
recommends operating spray pressures between 5-10 bar.
Setting up the sprayer at approximately 7 to 8 bar will
allow lower pressures (say 5 or 6 bar) to be used in early
season and higher pressures (say 9 or 10 bar) for later in
the season without having to change nozzles mid season.
It will also offer some margin around travelling slower or
faster than the chosen speed.
The advice provided above is general information only
and operators should seek specialised advice from their
agronomist / spray manager / someone skilled in the art
of spraying.
NOTE; when determining the optimum nozzles for
both spray rings (Tiers 1 & 2), all calculations should
be done at the same pressure.
STEP 6 - DETERMINE & SELECT
CORRECT NOZZLES
Knowing actual travel speed, application rate required,
number of rows to be sprayed in one pass, total number
of nozzles to be used and ideal spray pressure, we can
determine the nozzles required for the sprayer.
The calculation formulation is;
Litres/Minute/Nozzle
(Litres per minute per nozzle)
= Litres/Ha x Km/hr ÷ 600
total number of nozzles used
x row spacing (m)
x number of rows in one pass
NOTE; it’s easiest to make the calculations based on
each individual spray ring volume and then combine
both rings. Always select nozzles using the same
pressure.
For example, using Example A from the previous pages ….
• Row spacing = 3.0m
• Number of rows = 2
• Number of nozzles = 40
• Speed = 7.5 kph
• Ideal pressure 7 ~ 8 bar
• Tier 1 target rate = 300 L/ha
• Tier 2 target rate = 450 L/ha
• Tier 3 target rate = 750 L/ha
Using the above formula ….
300 (target rate) x 7.5 (speed) ÷ 600 ÷ 40 (number of
nozzles) x 3.0 (row spacing) x 2 (no. of rows) = 0.56 Litres
per minute per nozzle.
Once the flow rate per nozzle is known select the most
appropriate nozzle from a flowrate chart for the nozzle
being used. Flowrate charts are available from relevant
nozzle suppliers. Croplands supplies and recommends the
ALBUZ ATR Hollow Cone Nozzles for the Quantum Mist
Sprayers.
Pictured left and overleaf are screenshots taken from
a small spreadsheet program freely available from the
Croplands Web Site or Croplands Customer Service titled
“ALBUZ QM Nozzle Selection Worksheet” which makes
it much quicker to calculate nozzle requirements. For more
nozzles see the Croplands Optima buyers guide.
SECTION 7
SPRAYING INFORMATION
Step1:
Enter data in grey boxes
Target rate (L/ha)
650
Speed (km/hr)
7.5
Row spacing (m)
3
Number of rows
1
Number of nozzles
40
Total L/min =
24.375
L/min per nozzle
0.61
Step 2:
Select nozzles from chart
ALBUZ NOZZLE
PART NUMBER
MESH
5 Bar
6 Bar
7 Bar
8 Bar
9 Bar
10 Bar
11 Bar
12 Bar
13 Bar
14 Bar
15 Bar
WHITE
AZ-ATR-WE-80C
100
0.27
0.29
0.32
0.34
0.36
0.38
0.39
0.41
0.43
0.44
0.46
LILAC
AZ-ATR-LC-80C
50
0.36
0.39
0.42
0.45
0.48
0.50
0.52
0.55
0.57
0.59
0.61
BROWN
AZ-ATR-BN-80C
50
0.48
0.52
0.56
0.60
0.64
0.67
0.7
0.73
0.76
0.79
0.81
YELLOW
AZ-ATR-YW-80C
50
0.73
0.80
0.86
0.92
0.97
1.03
1.07
1.12
1.17
1.21
1.25
ORANGE
AZ-ATR-OE-80C
50
0.99
1.08
1.17
1.24
1.32
1.39
1.45
1.51
1.57
1.63
1.69
RED
AZ-ATR-RD-80C
50
1.38
1.51
1.62
1.73
1.83
1.92
2.01
2.09
2.17
2.25
2.33
GREY
AZ-ATR-GY-80C
50
1.5
1.63
1.76
1.87
1.98
2.08
2.17
2.26
2.35
2.43
2.51
GREEN
AZ-ATR-GN-80C
50
1.78
1.94
2.09
2.22
2.35
2.47
2.58
2.69
2.79
2.89
2.99
BLACK
AZ-ATR-BK-80C
50
2
2.18
2.35
2.50
2.64
2.78
2.9
3.03
3.14
3.26
3.36
BLUE
AZ-ATR-BE-80C
50
2.45
2.67
2.87
3.06
3.24
3.40
3.56
3.71
3.85
3.99
4.12
Quantum Mist ALBUZ Nozzle Selection Worksheet
Formula
