Hunter I-60 Series Product Information page 19

EXAMPLE 2
NEW DESIGN & INSTALLATION:
New 10-Acre City Park, Specified 100%
Hunter Product
A city has decided to specify the installation
of 100% Hunter product in a new park.
The park has 76 psi available static water
pressure and two 2" water meters under
which the system must be designed. Now,
the only question is what type of rotor
makes the most sense to install. Under
consideration are the I-25 and I-60 rotors.
The I-25 rotors must be spaced closer
together requiring more heads per acre
and, while choosing the I-60 not only
means fewer heads covering a greater
distance, but also heads that can deliver
water more efficiently at the site's low
operating pressure.
SPECS. Option 1: I-60 Rotors
AVAILABLE STATIC
PRESSURE 76 psi
DYNAMIC PRESSURE - 36 psi
LOSSES
OPERATING ROTOR 40 psi
PRESSURE
NOZZLE 12.5 gpm
SPACING 58' Equilateral Triangular
ROTORS PER ACRE 16
TOTAL ROTORS 160
ZONES 20
PIPE BETWEEN HEADS 9,280'
HUNTER PRODUCT LIST PRICE:
Option 1: I-60 Rotor System
20 ICV-210G 2" Valve $ 2,540
160 I-60 Rotors $ 14,392
1 ICC-8M+16 Controller $ 685
TOTAL COST $17,617
Conclusion:
The cost of Hunter irrigation products
needed for this 10-acre park is
approximately the same, whether
the I-25 or the I-60 option is installed.
The difference is only slight, with the I-60
system coming in just $161 less. Where
the real money is saved is in the piping
material and the labor to install the
complete system. A very rough
comparison estimate ratio that is intended
to show the amount of material needed for
the two systems indicates that the I-25
system will use at least 23% more pipe
and fittings than the I-60 system. This
ratio is directly linked to material costs.
The biggest cost savings show up in the
installation costs, with the number of
rotors needed (and, therefore, the
accompanying cost of labor) being over
Option 2: I-25 Rotors
62% higher installing the I-25 system as
opposed to the I-60 system.
76 psi
- 36 psi
40 psi
6.6 gpm
44' Equilateral Triangular
26
260
18
11,440'
Option Rotor System
2: I-25
18 ICV-201G 2" Valve $ 2,286
260 I-25 Rotors $14,807
1 ICC-8M+16 Controller $ 685
TOTAL COST $17,778
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