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Dole Flow Control

ZmanZman Posts: 5,533Member
edited February 14 in THE MAIN WALL
I ran into this product installed on a large domestic recirc system. Does anyone know what the CV value of one of these little buggers is? It is probably 1980's vintage. It looks like model 985


"If you can't explain it simply, you don't understand it well enough"
Albert Einstein

Comments

  • hot_rodhot_rod Posts: 12,584Member
    Maybe try try the Eaton site
    For old literature
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • hot_rodhot_rod Posts: 12,584Member
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • EBEBRATT-EdEBEBRATT-Ed Posts: 6,557Member
    Flow restrictor. Used to put them on tankless coils to prevent overdrawing them. That was before low flow shower heads. I think they were rated around 2 or 3 gpm
  • PumpguyPumpguy Posts: 413Member
    We use Dole Flow Control Valves all the time to meter the water flow volume for sealing liquid ring vacuum pumps.

    The construction is a flexible orifice backed up with a fixed orifice. The flow rate in GPM is stamped on the valve's housing.

    With this construction, the rated GPM is pretty much constant, + or - 15%, through a supply pressure ranging from around 25 PSI through 100 PSI.

    I like them because the alternate is an adjusting valve in the seal water line, and if its adjustable, someone will mess with it and the pump will then get the wrong amount of seal water.
    Dennis Pataki. Former Service Manager and Heating Pump Product Manager for Nash Engineering Company. Phone: 1-888 853 9963
    Website: www.nashjenningspumps.com
  • hot_rodhot_rod Posts: 12,584Member
    Basically a pressure independent balance valve the opening varies based Differential pressure changes
    PIB or PIV is another name

    https://www.caleffi.com/sites/default/files/file/01166_19_na.pdf
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • ZmanZman Posts: 5,533Member
    I am trying to determine the correct recirc pump size. I need to know how much head i need to throw at one of these in order to get say .25 gpm out the other side.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • hot_rodhot_rod Posts: 12,584Member
    They use a different technology, but I suspect sizing would be similar to the Caleffi. The Cv changes as the orifice size changes to regulate
    So here is how we size the 121 and 127 valves, a PIV pressure independent valve, a aka "flow control valve"

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
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