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welcome to the peanut gallery....help

Discussion in 'Irrigation' started by unit28, Sep 21, 2011.

  1. unit28

    unit28 LawnSite Bronze Member
    Messages: 1,554

    spray heads triangular spaced
    15' elevation change , side yard
    direction North/South...persistently windy
    50' X 14' plot
    1" SRV Hunter valves {no FC}
    8 heads all H's
    the gpm from the fixed nozzles are around 1.3 , and pr is 2

    what is it with all the misting? {even with 0 wind conditions}
    , with 5mph winds, just forget pr rates even hitting an nth of spec'd ratio
  2. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,219

    Really need to know static pressure at the backflow preventer, but more importantly, pressure at the head itself. Optimal pressure at the spray head is approximately 30 psi. Above that and you start getting misting.
  3. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,565

    Can the SRY bonnet be replaced with one from a PGV-with-flow-control?
  4. Sprinkus

    Sprinkus LawnSite Silver Member
    Messages: 2,310

    The SRV comes in both flow control and no flow control versions.
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,565

    Well, there you go. Don't think I ever saw a flow-control SRV - always thought it was kind of shoved to the side when the PGV arrived.

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