Ag-spray-equipment BA6D_BA8D Manuel d'utilisateur télécharger pdf (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

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"

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

1 2 3 4 5 6 7

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Ag-spray-equipment BA6D_BA8D Manuel d'utilisateur Page 3

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