Great Plains YP2425A Material Rate - Manual (Page 41)

2012-02-29 Table of Contents Metric Charts 401-626B
Great Plains Manufacturing, Inc. Table of Contents Metric Charts 39
Fertilizer Rate
The YP2425A planter optionally includes one or two
fertilizer manifolds, and may include one or two
ground-driven pumps for the Type 2 manifold. Tank(s)
and any off-planter pump(s) are usually located on a
trailing tank cart.
The Great Plains PFC1600 (single tank) and PFC2000
(dual tank) tanks include a single pump. Refer to the tank
Operator’s Manual for pump settings at the tank.
Note: Great Plains recommends checking with your local
Agronomist as soil conditions vary. Soil conditions
in your area may need lesser or more amounts of
fertilizer than represented in these charts. Do not
exceed 12 gallons/ac (112 liters/Ha) in any case.
Fertilizer rate is independent of seed rate. Fertilizer rates
are set by the pump systems. On-planter ground drive
pump operations are described on page 42 and in the
YP2425A Operator’s Manual. Off-planter pump
operations are described in the tank manual.
Manifold systems include orifice plates at each row unit
drop line. Each fertilizer system normally includes a
pressure relief valve and strainer. These components
affect consistency of flow across all rows.
Adjust the relief valve(s) per the YP2425A Operator’s
Manual and/or tank Operator’s Manual.
Orifice Plate Selection
Refer to Figure 19
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. Plates
are provided with the system(s) 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.
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.
Installed
Manifold(s)
Type 2
(Starter)
Pump(s)
Type 3
(Hi-Rate)
Pump
Type 3 and Type 2
(both systems in
use at same time)
Type 3 only
Figure 19
Fertilizer Orifice Plate
29984
1
1
Orifice Part Port Port
Size Number Diameter Area
20 832-052C 0.020 in 0.20 mm²
28* 832-056C 0.028 in 0.40 mm²
34* 832-053C 0.034 in 0.59 mm²
48* 832-054C 0.048 in 1.17 mm²
59 832-057C 0.059 in 1.76 mm²
80 832-055C 0.080 in 3.24 mm²
98 832-059C 0.098 in 4.87 mm²
29993 * Sizes standard in many fertilizer bundles.
Check your accessories before ordering.
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