GREAT PLAINS Nutri-Pro NP30L, Руководство оператора

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2018-10-10 Table of Contents Index 407-313M
NP30L or NP40L Table of Contents Index Adjustments 88
Select and Install Orifice Plates
If using VeriFlow nozzles, orifice plate instructions do not
apply. However, the topic “
Tramlines and Doubled
Rows ” on page 89 applies to all types of nozzles.
Agricultural Chemical Hazard:
Wear protective gloves when changing orifice plates. Consult
material manufacturer or supplier documents for proper
handling and steps to take if skin contact occurs.
Refer to Figure 61
Orifice plates at each drop line nozzle provide
back-pressure that balances flow in the manifolds,
assuring that each row obtains the same flow rate. For a
given rate, there may be more than one orifice size that
provides the recommended back-pressure.
Plates are provided with the system in three sizes.
Additional sizes are available. In general, the orifice
needs to be small enough to create a minimum pressure
in the manifold but large enough to prevent the manifold
pressure from exceeding the maximum:
15 psi min., 15-40 optimal, 65 psi max.
Using an orifice size too large can result in unequal flow
at rows. Using a size too small can cause excess
back-pressure resulting in material dumping at the relief
valve.
Determine Orifice Size
The chart below shows rate ranges for each Great Plains
orifice size and row spacing. You may need to change to
the next higher or lower orifice for a different fertilizer
solution density and/or a different ground speed.
To reduce orifice plugging and pump wear, use the
largest orifice practical for your fertilizer application rate.
Material Loss or Misapplication Risks:
Orifice size must be appropriate for rate selected. Drop line
orifice plates
do not affect rate . If orifice size is too small,
over-pressure in system may result in material loss at relief
valve. An orifice size too large may result in uneven
application across all rows.
When shutting off rows, review orifice sizing.
Figure 61
Fertilizer Drop Line Nozzle
29984
1
1
Orifice Plate S ize 20 2 8 * 3 4* 4 8 * 59 8 0 9 8
Recommended Rate Ran g e in Gallon s per Acre. Ran g e i s 15 - 40 P S I
Nozzle S pacin g
(V a l u e s bas ed on: 5.0 mph, 10.7 l bs /g a llon Fertilizer s ol u tion den s ity)
15 inch s in g le 2.2 - 3 .6 4.2 - 6.9 6. 3 - 10 12 - 20 19 - 3 0 3 4 - 56 54 - 88
3 0 inch s in g le
1.1 - 1. 8 2.1 - 3 .4 3 .2 - 5.2 6.1 - 10 9. 3 - 15 17 - 2 8 27 - 44
* The s e s ize s s t a nd a rd in mo s t Gre a t Pl a in s fertilizer s y s tem s . 3 1014L
Recommended Rate Ran g e in Litre s per Hectare. Ran g e i s 15 - 40 P S I
Nozzle S pacin g (V a l u e s bas ed on: 8 .0 kph, 1.2 8 kg/litre Fertilizer s ol u tion den s ity)
38 .1 cm s in g le
21 - 3 4 3 9 - 64 59 - 96 115 - 1 88 174 - 2 8 4 3 1 8 - 520 502 - 8 20
76.2 cm s in g le
10 - 17 20 - 3 2 29 - 4 8 57 - 94 8 7 - 142 159 - 260 251 - 410
* The s e s ize s s t a nd a rd in mo s t Gre a t Pl a in s fertilizer s y s tem s .
3 1014M