Hunter Industries - The Irrigation Innovators
IBV Pressure Loss Charts
Charts based on full-open flow control position.
IBV Pressure Loss in PSI
GPM 1" 1 1/2" 2" 3"
0.1 2.0


0.5 2.0
1.0 2.0


5.0 4.0
10.0 3.0


15.0 3.0
20.0 3.0 1.5

30.0 4.0 1.5
40.0 7.0 1.7 0.8
50.0 2.2 1.2
60.0
3.0 1.7
75.0 3.9 2.4
90.0
5.5 3.2
100.0 7.0 4.2
120.0
10.9 6.5
135.0 12.7 7.9
150.0
16.2 9.8 2.5
175.0 13.3 3.0
200.0

17.7 4.1
225.0 5.3
250.0


6.7
275.0 8.3
300.0


10.1
IBV Pressure Loss in Bars
m3/hr 1" 1 1/2" 2" 3"
0.05 0.14


0.10 0.14
0.25 0.14


1.00 0.17
2.50 0.19


3.50 0.21
4.50 0.24 0.10

7.00 0.33 0.11
9.00 0.45 0.12 0.05
11.00 0.15 0.07
13.50
0.20 0.10
17.00 0.29 0.15
20.50
0.42 0.22
23.00 0.52 0.28
27.00
0.72 0.39
30.50 0.93 0.50
34.00
1.16 0.63 0.15
40.00 0.88 0.20
45.50

1.15 0.26
51.00 0.34
57.00


0.43
62.50 0.53
68.00


0.64
IBV Pressure Loss in kPa
l/min 1" 1 1/2" 2" 3"
1.0 13.7


2.0 13.7
4.0 13.7


20.0 17.2
40.0 20.1


60.0 20.1
75.0 20.1 9.6

115.0 29.2 10.1
150.0 48.0 11.6 4.9
190.0 14.6 7.0
225.0
18.1 9.3
280.0 25.8 14.0
340.0
36.9 20.4
380.0 45.8 25.5
450.0
64.7 36.0
510.0 83.9 46.5
565.0
104.1 57.4 16.1
660.0 79.2 22.2
750.0

103.1 29.0
850.0 37.6
950.0


47.4
1050.0 58.4
1135.0


68.7