horsch Leeb 6 GS, Руководство по эксплуатации, Страница: 139 / 154

139
10. Nozzle selection
For the selection and use of nozzles you
should also follow the data and recom-
mendations of the corresponding nozzle
manufacturer!
10.1 General
This chapter describes two possibilities for
determining the appropriate nozzles and their
characteristics as per ISO 10625.
All application quantities (in l/ha)
mentioned in the spraying tables apply
for water.
For liquid fertiliser these application
quantities must first be converted:
For conversion to ammonium nitrate -
carbonyl diamide solution multiply the
application quantity with 0.88.
For conversion to NP-solution multiply
the application quantity with 0.85.
H
2
O
x 0.88
x 1.14
The diagram (a) serves the purpose of selecting
the suitable
nozzle type
.
The nozzle type is determined by
¾
the intended travel speed,
¾
the required application quantity
and
¾
the required atomizing characteristic (fine,
medium or large drops) of the crop protection
agent used for the crop protection measure
to be carried out.
The universal table (b) serves the purpose of
determining
¾
the
nozzle size
,
¾
the required spraying pressure
and
¾
the required
individual nozzle output
for
volumetric measurement of the crop protec-
tion sprayer.
10.2 Procedure
¾
The tables apply for 50 cm nozzle spacing.
¾
Nozzle sizes and colour coding acc. to ISO 10625
10.2.1 With diagram and universal
table
1. Determine application quantity, travel speed
and atomizing characteristic.
2.
Nozzle type diagram (a):
Determine the operating point. The operat-
ing point is the intersection of travel speed
and application quantity.
3. Draw a vertical from the operating point down.
4. Choose the suitable nozzle type for the
required atomizing characteristic.
For this purpose follow the classification
in the left diagram (fine, medium, coarse
drops). Pay attention to the possible noz-
zle sizes.
Characteristics Universal table:
Change to the universal table for a more
accurate determination of the characteristic
values.
5. In the column with the determined applica-
tion quantity find the line with the determined
travel speed (if necessary use an approxi-
mate value).
6. In the right hand line read the nozzle output
and the suitable nozzle sizes with the as-
sociated pressure.
Example:
to 1. Application quantity: 200 l/ha
Travel speed 8 km/h
Atomizing characteristic: coarse drops
to 2/3. See diagram (a)
to 4.
Nozzle type: ID/AL
possible nozzle types: -025 or -03
to 5. See universal table
to 6. Nozzle output: 1.35 l/min
Nozzles Size 025 with 5.5 bar
Size 030 with 3.8 bar
NP-solution H
2
O
x 0.85
x 1.18
ammonium ni-
trate - carbonyl
diamide solution