Distribution Analysis (No. 7-20 Nozzles) - Hunter I-60 Series Product Information

DISTRIBUTION ANALYSIS
Hunter's Testing Philosophy
The following five sets of distribution analysis for the new I-60 are from Hunter's state-of-the-art testing lab.
Hunter Industries routinely submits products to The Center for Irrigation Technology for independent testing.
We use CIT's test results to verify our own and to make our performance available to the public through their
computer software programs. All nozzles for the new I-60 are tested by CIT. The examples below coincide
with the five nozzles that are shipped with each sprinkler at 40 & 50 psi respectively.
I-60 Nozzle #7
Precipitation
0.40
Rate In/Hr
0.30
0.20
0.10
Distance From Head (in feet)
SC = & DU =
3.0
2.5
2.0
.30
1.5
.25
.48
.38
1.0
Head
40 50
Row
35 43
Equilateral Spacing (in feet)
Precipitation
0.52
Rate In/Hr
0.39
0.26
0.13
Distance From Head (in feet)
SC = & DU =
3.0
2.5
2.0
.35
1.5
.54
.43
.28
1.0
Head 40 50
Row 35 43
Equilateral Spacing (in feet)
Data Interpretation
The upper portion of each report shows the water distribution profile for the sprinkler along with flow, pressure, speed of rotation and radius
information. The lower portion is dedicated to efficiency and precipitation rate analysis. To read the graph, first note the spacing range at the
bottom. These are the reference points when looking for efficiency at a specific spacing. The lower solid bar that has the numbers above it is the
Scheduling Coefficient (SC) line. The numbers above this line reference the precipitation rate in inches per hour at each spacing. To find the SC at
your spacing, reference the vertical numbers on the left. SCs of less that 2 are considered good and less than 1.5 are considered excellent. The
dashed line along the top is the Distribution Uniformity (DU) line. The DU rating is expressed as a percentage which serves as an indicator
of the uniform of water application to a given area of sprinklers, spaced in a triangular pattern.
12
for Equilateral Spacing
100
90
.17
.20
80
.15
70
60
60 70
feet
52 61
for Equilateral Spacing
100
.20
90
.17
.23
80
70
60
60 70
feet
52 61
Model: I-60-36S
Nozzle: 7 (orange)
Flow: 6.75 GPM
Pressure: 40 PSI
SOR: 2:41 min.
Radius: 49 feet
Model: I-60-36S
Nozzle: 7 (orange)
Flow: 7.64 GPM
Pressure: 50 PSI
SOR: 2:39 min.
Radius: 53 feet