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Convert cv rating to head additions

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by goosegunner, Oct 16, 2011.

  1. goosegunner

    goosegunner Minister of Fire

    Joined:
    Oct 15, 2009
    Messages:
    1,278
    Loc:
    WI
    Trying to pin this down as close as possible

    The Danfoss is easy cv rating of 20 so I add 2.31 head if flowing 20gpm for that correct?

    Got some ratings for other things that are high so I am not sure what to add.

    Legend full port ball valves
    CV is 105

    Taco 4900 series air separator
    CV 49

    What would you add if you were flowing 20 gpm?

    or 30 gpm?

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  2. ewdudley

    ewdudley Minister of Fire

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    Nov 17, 2009
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    Loc:
    Cayuga County NY
  3. goosegunner

    goosegunner Minister of Fire

    Joined:
    Oct 15, 2009
    Messages:
    1,278
    Loc:
    WI
    Thanks that is very helpful!

    My valves have a drop of .0363 at 20 gpm or .0838 additional head per valve.

    4900 air separator drops .1666 or .384846 head

    gg

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