Nelson Irrigation Corp. 848 Airport Rd. Walla Walla, WA 99362-2271 USA Tel: 509.525.7660 Fax: 509.525.7907 E-mail: info@nelsonirrigation.com Web site: www.nelsonirrigation.com
9
200 SERIES BIG GUN SPECIFICATION
1. GENERAL:
The 200 Series Nelson Big Gun
®
sprinklers (models SR200 and F200) shall be capable of
operating in a pressure range from 60 PSI through 130 PSI. The nozzle size range is from 1.05”
through 1.9” for taper bore nozzles, from 1.29” through 1.93” for ring type nozzles and from
28 mm through 48 mm for taper-ring nozzles. Optional trajectory angles on the SR200 and the
F200 shall be 21º, 24º and 27º. Materials used shall be acceptable for most irrigation water
conditions. All exposed metal parts shall be stainless steel, brass, or aluminum. Welds and
seals shall be air pressure checked at the factory to assure against water leakage. The gun shall
be provided with optional connections at the base consisting of Nelson Flange, Metric Flange,
ANSI/DIN Flange type, 3 ½” or 4” Female NPT cast iron flange adapters shall be optional
accessories.
2. DESIGN
1. The
sprinkler bodysprinkler body
sprinkler bodysprinkler body
sprinkler body range tube and drive arm shall be of aluminum construction. The range
tube shall have non-clog straightener vanes extended the full length of the range tube to
reduce turbulence and provide greater diameter of coverage. All wear points or strike areas
shall be constructed of stainless steel or polyurethane for longer life.
2. The
drive armdrive arm
drive armdrive arm
drive arm shall be equipped with ball bearings at the pivot point and shall have a
replaceable vaned self-cleaning drive vane. Self-adjusting drive vane to give consistent
drive and arm rate in full operating range. Part circle operation shall be accomplished with
dual drive and reverse drive vane. The ball bearings shall be lubricated and sealed to
eliminate the need of grease zirks and frequent maintenance. The drive spoon shall be
vaned for reliable drive power. The drive arm weight shall be adjustable to increase or
decrease the drive power if desired.
3. The
lower bearinglower bearing
lower bearinglower bearing
lower bearing assembly shall be constructed with an aluminum housing and shall be
equipped with dual ball bearing for ease of rotation and less wear. The bearing assembly
shall be sealed and lubricated eliminating the need for grease zirks and frequent mainte-
nance.
4. The
braking systembraking system
braking systembraking system
braking system shall be a constant friction disc brake of Delrin plastic material on
brass. It shall have pre-load brake springs for proper rotation on uneven terrain. It shall be
fully shielded to prevent contamination from outside sources.
5. The
part circlepart circle
part circlepart circle
part circle models shall be equipped with precise arc control stops that are easily set.
They shall be provided with easily accessible bolt heads or flex-handle stops as desired.
6. The sprinkler
nozzle optionsnozzle options
nozzle optionsnozzle options
nozzle options shall be available with taper bore, ring or taper-ring type nozzles.
All nozzle types shall be interchangeable without any adjustment required on the Big Gun
®
sprinkler.
200 SERIES BIG GUN
®
SPECIFICATIONS
2/05
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