Determine orifice size – Great Plains YP1625 Material Rate User Manual
Page 58
Great Plains Mfg., Inc.
54
401-263B
11/23/2011
Determine Orifice Size
The chart 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 planter swath. Not
all of the higher rates are possible in all configura-
tions.
Orifice size is only used to create 15-65 psi back pressure to
provide even flow between rows. Set application rate in gallons
per acre using pump drive chart.
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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