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Need Quick Answer to Simple Question

Mike T., Swampeast MO
Mike T., Swampeast MO Member Posts: 6,928
in THE MAIN WALL
Head loss per 100' of "typical" PEX in ½" and 3/8".

Am working on a sizing/application/initial balance computer program for Danfoss FHVs and some of you will know it off the top of your head I'm sure...

Thanks!

Comments

  • Rich Corcoran_18
    Rich Corcoran_18 Member Posts: 9
    Head loss of pex.

    What's your flow rate?
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928
    ARGGH!!!

    What the heqq was I thinking!!! I know MUCH better...

    Link to table for "typical" PEX pressure drop?

    Something tells me I'm going to have to end up with my "backwards" calculus for this program! (Backwards meaning I only realize it's calc. after I've done it...)

    "Magic" delta-p is the goal of the programming as it's the delta-p that keeps head loss through all of the loops nearly identical regardless of loop size/length. (The FHVs have an initial adjustment where you "dial in" for a specific delta-p of the valve itself based on your flow and delta-t).

    Of course this program will assume constant circulation, maintenance conditions and the ability of your construction to actually deliver the required BTUs to the floor...
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