Rotary Sprinklers

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• Rotary Sprinklers uniform application over
  entire area lawns

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Micro sprays Water uniformly over small areas
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Drip Trickle specific area shrubs
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Spray Heads

• Technical Information operating pressure, flow,
  radius of throw, and nozzle options
• Fixed head
• Rotary Motor-driven
• Rotary Impact
• Bubbles

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Sprinkler Irrigation

• Uniform application by overlapping non-uniform
  wetting paterns
• Sprinkler spray heads no moving parts - small
  area pop up
• Microsprays overhead small area
• Rotary Sprinklers Impact or gear driven

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Technical Information

• Nozzle - removable controls velocity and flow
• Operating Pressure inc pressure inc water
  flow and change wetting pattern
• Radius of Throw furthest point
• Water Distribution Patterns
• Trajectory angle

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When a sprinkler is tested to determine its
Distribution Rate Curve (often abbreviated as DRC)
One measure used to compare DRCs is the
scheduling coefficient or SC.
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Scheduling Coefficient (SC) is the average depth
of water in the catch cans divided by the depth
of water in the catch can having the least amount
of water. Interpolation
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Sprinkler layout

1. Define Boundary
2. Select Spacing Pattern
3. Wind speed
4. Design coefficient
5. Select Sprinkler Head
6. Spacing based on nozzle and pressure
7. Precipitation rate
8. Time of application P t depth needed

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Head-to-head,
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Spacing

• S less than or equal to k D k 2 r
• k is a constant depending on spacing and wind
  speed

Table 1, Values of ks Table 1, Values of ks
Wind Speed Triangular Square
0-3 mph 0.60 0.55
4-7 mph 0.55 0.50
8-12 mph 0.50 0.45
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Precipitation Rates

• P q/A
• Units MUST be consistent. For
• P precipitation rate (in/hr)
• q flow onto area (gal/min)
• A area (ft²)
• P 96.3 q/A