Great Plains NP4000 40-foot Operator Manual User Manual
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NP4000
Great Plains Manufacturing, Inc.
407-776M
2012-03-28
35. Boom Clamp
Boom Option: This fitting taps the boom for delivery
to the row. it contains an 8 psi check valve, which
prevents dribbling when the system is idle. Seasonal
clean-out (page 79) is necessary to prevent
over-winter freezing of residual material.
Booms typically have more boom clamps than
applicator rows (the same boom assembly is used
on multiple implement models). Active rows have
nozzle bodies
. Inactive stations have shutoff
caps
.
36. Shutoff Cap
Boom Option: Unused boom clamp stations are
capped. Use a gasket (with or without plate) under a
cap.
37. Gasket
Boom Option: This flat O-ring seals the nozzle
body
or shutoff cap
to the boom clamp
. The
inside diameter of the gasket is grooved to accept an
orifice plate
. Do not operate without a gasket.
38. Orifice Plate
Boom Option: These stainless steel plates restrict
the flow to the row. Their function is to create
back-pressure to the pump, and ensure equal flow at
all rows.
The standard boom option includes complete sets of
plates at three sizes. Additional plate sizes are
available. The orifice size must be matched to the
rate and viscosity of the material being applied. See
page 70 for plate selection and installation.
39. Nozzle Body
Boom Option: This fitting adapts the boom clamp to
tubing, and may be positioned for forward or rear
tubing direction.
40. Drop Tubing
Boom Option: This tubing carries the material to the
row.
41. Applicator Arm and Tubing
Coulter Option: The tubing is protected behind arm
structure. The arm may be adjusted for release
depth relative to coulter depth (page 54).
42. Applicator Nozzle
Coulter Option: This stainless steel fitting (part
number 828-046C) delivers the material to the trench
opened by the coulters. It has an 0.040 in. orifice
port.
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