GREAT PLAINS Yield-Pro YP4025A-48TR20, Руководство оператора

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YP4025A-48TR20 Table of Contents Index Adjustments 77
2019-03-19 Table of Contents Index 411-198M
Fertilizer Nozzle Adjustments
Refer to Figure 73
In general, the orifice needs to be small enough to
create at least 15 psi of pressure in the manifold but
large enough to prevent the manifold pressure from
exceeding 65 psi.
The minimum pressure is required to even out the flow of
fertilizer between rows. To reduce orifice plugging and
pump wear, use the largest orifice practical for your
fertilizer application rate. Alternate orifice plates are
listed in the Seed Rate manual.
The best pressure range to maintain is 20-40 psi to
ensure optimum distribution while minimizing leakage.
Built-in check valves at the row units prevent flow below
15 psi.
The Seed Rate Chart book for this product (manual part
number ManualB #) contains a table of orifice sizes in
gallons per acre.
Agricultural Chemical Hazard:
Wear protective gloves when changing orifice plates.
System Damage/Uneven Application Risks:
Select orifice plates to balance flow. Sizes too small can result
in system rupture. Sizes too large can result in unbalanced
flow. Orifice plates do not set fertilizer rate. Rate is set at the
pump. Plates only create back-pressure to balance flow.
If frequent plate changes are likely, consider replacing
the standard nozzles with SprayTarget VeriFlow
nozzles. The novel spring-loaded design provides
consistent back-pressure over a wide range of rates and
pressures. See page 141 for ordering information.
Figure 73
Fertilizer Orifice Plate
29984
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