Ag Spray Equipment BA6D_BA8D - Manual (Page 3)

Nozzle Spacing
GPA coverage by one of the following factors.
from those tabulated, multiply the tabulated
If the nozzle spacing on your boom is different
1.43
28"
Where Tables are Based on 40" Nozzle Spacing
1.15
26"
Where Tables are Based on 30" Nozzle Spacing
2.5
8"
Where Tables are Based on 20" Nozzle Spacing
Conversion
Factor
Conversion
Other Spacing
Factor
Conversion
Other Spacing
Factor
Other Spacing
1.05
38"
.79
38"
1.11
1.33
30"
1.25
32"
1.07
28"
2
32"
.94
1.67
1.11
36"
1.18
34"
.83
36"
1.25
34"
.88
1.43
.83
48"
.68
44"
.66
.95
42"
.91
44"
40"
.75
.91
42"
.71
.83
18" 10" 12" 16" 14" 30" 22" 24"
Spraying Solutions Other Than Water
Since all the tabulations are based on spraying water, which
weighs 8.34 lbs per USA gallon, conversion factors must be
used when spraying solutions which are heavier or lighter than
water. To determine the proper size nozzle for the solution to be
sprayed, first multiply the desired GPM or GPA of solution by
the rate conversion factor. Then use the new converted GPM or
GPA rate to select the proper size nozzle.
Example: Desired application rate is 20 GPA of 28% Nitrogen.
Determine the correct nozzle size as follows:
GPA (Solution) x Conversion Factor = GPA
20 GPA (28%) x 1.13 = 22.6 GPA (Water)
The applicator should choose a nozzle size that will supply 22.6
GPA of water at the desired pressure.
Miscellaneous Conversion Factors
One Acre = 43,560 square feet = 0.405 Hectacre
One Hectacre = 2.471 Acres
One Gallon Per Acre = 9.35 Liters Per Hectacre
One Mile = 5280 Feet = 1610 Meters = 1.61 Kilometers
One Gallon = 128 Fluid Ounces = 8 Pints = 4 Quarts = 3.79
Liters = 0.83 Imperial Gallons
One Pound Per Square Inch = 0.069 bar. = 6.895 Kilo-Pascals
One Mile Per Hour = 1.609 Kilometers Per Hour
Higher pressure not only increases the flow rate of the nozzle,
but it also influences the droplet size and the rate of orifice
wear. As pressure is increased, the droplet size decreases
and the rate of orifice wear is increased.
The values given in the tabulation section of this owners
manual indicate the most commonly used pressure ranges for
the associated spray tips.
Higher pressure not only increases the flow rate of the
nozzle, but it also influences the droplet size and the rate of
orifice wear. As pressure is increased, the droplet size
decreases, and the rate of orifice wear is increased.
The values given in the tabulation section of this owner's
manual indicate the most commonly used pressure ranges
for the associated spray tips.
Effect of Pressure on Volume
8002
@ 10 psi @ 40 psi
8002
0.1 gpm 0.2 gpm
Effect of Pressure on Spray Angle
@ 15 psi
8002 8002
@ 40 psi
18"
23"
60° 80°
30"
18"
Page 3
Flow Rate
Nozzle flow rate varies with spraying pressure. In general,
the relationship between GPM and pressure is as follows:
This equation is explained by the illustration below. Simply
stated, to double the flow through a nozzle, the pressure be
increased four times.
Spray Angle and Coverage
Depending on the nozzle type and size, the operating
pressure can have a significant effect on spray angle and
quality of spray distribution. As shown above for an 8002 flat
spray tip, lowering the pressure results in a smaller spray
angle and a significant reduction in spray coverage.
Tabulations for spray tips shown in this owner's manual are
based on spraying water. Generally, liquids more viscous
than water form relatively smaller spray angles. Whereas,
liquids with surface tensions lower than water will produce
wider spray angles. In situations where the uniformity of
spray distribution is important, be careful to operate your
spray tips within the proper pressure range.
NOTE: Suggested minimum spray heights for broadcast
spraying are based upon nozzles spraying water at the
rated spray angle.
Weight of Solution
Specific
Gravity
Conversion
Factors
7.0 lbs per gallon .84 .92
8.0 lbs per gallon .96 .98
8.834 lbs per gallon (Water) 1.00 1.00
9.0 lbs per gallon 1.08 1.04
10.0 lbs per gallon 1.20 1.10
10.65 lbs per gallon (28% Nitrogen) 1.28 1.13
11.0 lbs per gallon 1.32 1.15
12.0 lbs per gallon 1.44 1.20
14.0 lbs per gallon 1.68 1.30