2019-04-12
417-459M
NP2540
Options
150
Install Orifice Plates
Orifice plates are used only with the standard (TeeJet
®
)
nozzles.
Insert the plate inside the gasket supplied with the
nozzle . Insert the gasketed plate with the legend side
facing out the nozzle outlet (typically up).
In general, the orifice needs to be small enough to create
enough pressure in the manifold to operate the check
valves in the boom clamps, but not so much that the
system dumps product at the boom relief valve.
The recommend operating pressure is: 15 to 40 psi
Using an orifice size too large can result in unequal flow
at rows, intermittent flow, and flow stoppage at rows
where pressure falls below the 8 psi required to open the
clamp check valve. Using a size too small can cause
excess back-pressure resulting in material dumping at
the boom relief valve.
Use the same size at all active rows.
Excess Back-Pressure Risk:
If using a size of 0.048 in. or larger, remove the 828-046C
nozzle from the outlet of the coulter tine.
Tramlines and Doubled Rows
If your operations result in row units running in the same
row (or rows) in opposing passes, take steps to avoid
double application (run those rows at half rate).
•
For doubled rows using standard nozzles, use orifice
plates having
1
/
2
(or slightly more than
1
/
2
) the
Port Area
of the other rows. See the table at right,
right-most column, for the Port Area of each plate
call size.
Orifice Plate Size
20
28*
34*
48*
59
80
98
Recommended Rate Range in Gallons per Acre. Range is 15 - 40 PSI
Nozzle Spacing
(Values based on: 5.0 mph, 10.7 lbs/gallon Fertilizer solution density)
15 inch single
2.2 - 3.6
4.2 - 6.9
6.3 - 10
12 - 20
19 - 30
34 - 56
54 - 88
30 inch single
1.1 - 1.8
2.1 - 3.4
3.2 - 5.2
6.1 - 10
9.3 - 15
17 - 28
27 - 44
* These sizes standard in most Great Plains fertilizer systems.
31014L
Recommended Rate Range in Litres per Hectare. Range is 15 - 40 PSI
Nozzle Spacing
(Values based on: 8.0 kph, 1.28 kg/litre Fertilizer solution density)
38.1 cm single
21 - 34
39 - 64
59 - 96
115 - 188
174 - 284
318 - 520
502 - 820
76.2 cm single
10 - 17
20 - 32
29 - 48
57 - 94
87 - 142
159 - 260
251 - 410
* These sizes standard in most Great Plains fertilizer systems.
31014M
Replacement nozzles include gaskets.
Gaskets may also be ordered separately as Great
Plains part number CP18999-EPR.
Agricultural Chemical Hazard:
Wear protective gloves when changing orifice plates and
strainer screens. Consult material manufacturer or supplier
documents for proper handling and steps to take if skin contact
occurs.
Figure 99
Fertilizer Orifice Plate
36715
1
2
3
1
2
3