The Irrigation Innovators
PGJ Nozzle Performance Data
  Pressure Radius Flow Precip in/hr
Nozzle PSI ft. GPM
.75
30
40
50
15'
16'
17'
0.64
0.75
0.85
0.55
0.56
0.57
0.63
0.65
0.65
1.0
30
40
50
18'
19'
19'
0.85
1.0
1.1
0.51
0.53
0.59
0.58
0.62
0.68
1.5
30
40
50
21'
22'
22'
1.3
1.5
1.7
0.57
0.60
0.68
0.66
0.69
0.78
2.0
30
40
50
24'
25'
25'
1.7
2.0
2.3
0.57
0.62
0.71
0.66
0.71
0.82
2.5
30
40
50
27'
28'
28'
2.2
2.5
2.8
0.58
0.61
0.69
0.67
0.71
0.79
3.0
30
40
50
30'
31'
31'
2.5
3.0
3.4
0.53
0.60
0.68
0.62
0.69
0.79
4.0
30
40
50
33'
34'
34'
3.7
4.0
4.3
0.65
0.67
0.72
0.76
0.77
0.83
5.0
30
40
50
36'
37'
37'
4.7
5.0
5.3
0.70
0.70
0.75
0.81
0.81
0.86

Note: All precipitation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2. For more information on precipitation rates see below.

Data represent test results in zero wind. Adjust for local conditions. Radius may be reduced up to 25% with adjustment screw (this may alter the uniformity of the spray pattern).

Optimum performance is shown in bold type.

To ensure optimum nozzle performance, the rotor should be operated in the "Recommended pressure range." The sprinkler will work normally when used in the "Operating pressure range", but nozzle performance may be reduced.

Precipitation Rates:
The nozzle performance charts have two columns that show the approximate precipitation rates for the sprinklers at a given pressure, radius (spacing) and flow. The column on the left with the Square Precipatation Rate Symbol symbol shows the precipitation rate for the sprinklers when they are laid out in a square pattern. The formula used to calculate the precipitation rate in this case is the “Sprinkler Spacing Method – Any Arc and Any Spacing” equation, see the Hunter Catalog for more information.

The column on the right with the Triangular Precipatation Rate Symbol symbol shows the precipitation rate for the sprinklers when they are laid out in an equilateral triangular spacing pattern. The formula used to calculate the precipitation rate in this case is the “Sprinkler Spacing Method – Equilateral Triangular Spacing” equation, see the Hunter Catalog for more information.