Set pump adjuster, Determine orifice size, Set pump adjuster determine orifice size – Great Plains NTA2007 Material Rate User Manual
Page 33
Great Plains Manufacturing, Inc.
Liquid Fertilizer Rates
31
2012-01-03
167-085B
Set Pump Adjuster
Using the box-wrench end of the CDS-John Blue
115631-01 tool
, loosen the setting pointer nut
4.
Use the other end of the tool to rotate the dial
the setting determined by table, slide chart or
internet calculator.
5.
Re-tighten pointer nut.
Determine Orifice Size
Orifice plates at each drop line provide back-pressure
that balances flow in the manifolds, assuring that each
row obtains the same rate. Plates are provided with the
system(s) in three sizes. Additional sizes are available.
6.
Choose orifice size based on desired rate. For a
given rate, there may be more than one orifice size
that provides the recommended back-pressure. To
reduce orifice wear, orifice plugging and pump wear,
use the largest orifice practical for your fertilizer
application rate.
The table 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.
Note: Maximum available rate depends on pump rating, drive setup, ground speed, and drill swath.
Not all of the higher rates above are possible in all configurations.
Material Loss/Equipment Damage Risk:
Set application rate at pump, not by orifice size. Orifice size is
only used to create 15-40 psi back pressure to provide even
flow between rows. An orifice size too small causes material
loss at relief valve. A size too large can cause irregular flow.
Figure 13
NGP-6055K Pump Adjuster
31320
1
2
3
2
3
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)
6 inch single
5.6 - 9.1
11 - 17
16 - 26
31 - 50
46 - 76
85 - 139
134 - 219
7.5 inch single
4.5 - 7.3
8.4 - 14
13 - 21
25 - 40
37 - 61
68 - 111
107 - 175
8 inch single
4.2 - 6.8
7.9 - 13
12 - 19
23 - 38
35 - 57
64 - 104
101 - 164
9.5 inch single
3.5 - 5.8
6.6 - 11
10 - 16
19 - 32
29 - 48
54 - 88
85 - 138
10 inch single
3.4 - 5.5
6.3 - 10
9.5 - 15
18 - 30
28 - 46
51 - 83
80 - 131
13.8in (35cm, 70TR)
2.4 - 4.0
4.6 - 7.5
6.9 - 11
13 - 22
20 - 33
37 - 61
58 - 95
15in single (30TR)
2.2 - 3.6
4.2 - 6.9
6.3 - 10
12 - 20
19 - 30
34 - 56
54 - 88
18in (36in Twin Row)
1.9 - 3.0
3.5 - 5.7
5.3 - 8.6
10 - 17
15 - 25
28 - 46
45 - 73
19in (38in Twin Row)
1.8 - 2.9
3.3 - 5.4
5.0 - 8.1
9.7 - 16
15 - 24
27 - 44
42 - 69
20 inch single
1.7 - 2.7
3.2 - 5.2
4.7 - 7.7
9.2 - 15
14 - 23
26 - 42
40 - 66
27.6in (70cm single)
1.2 - 2.0
2.3 - 3.7
3.4 - 5.6
6.7 - 11
10 - 17
19 - 30
29 - 48
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
36 inch single
0.9 - 1.5
1.8 - 2.9
2.6 - 4.3
5.1 - 8.4
7.7 - 13
14 - 23
22 - 37
38 inch single
0.9 - 1.4
1.7 - 2.7
2.5 - 4.1
4.8 - 7.9
7.3 - 12
13 - 22
21 - 35
40 inch single
0.8 - 1.4
1.6 - 2.6
2.4 - 3.9
4.6 - 7.5
7.0 - 11
13 - 21
20 - 33
* These sizes standard in most Great Plains fertilizer systems.
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