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Thread: Series vs parallel

  1. #1
    Join Date
    Apr 2019
    Location
    MN
    Posts
    4

    Default Series vs parallel

    I am wondering how the membranes are rated when running them series vs parallel.
    Will 3 100gpd in series make the system a 300gpd or still only 100?

  2. #2
    Join Date
    Feb 2019
    Location
    Murrysville, Pennsylvania
    Posts
    186

    Default

    Short answer is still 100 gpd but higher concentrate % than in parallel. I have a blog post in this topic that explains both and hybrid set ups.

    https://www.sugartree.run/2020/01/di...-hobby-ro.html
    Last edited by DRoseum; 03-05-2020 at 05:35 PM.
    D. Roseum
    www.roseummaple.com
    ~100 taps on 3/16 custom temp controlled vacuum; custom nat gas evap with temp and level controllers; homemade RO; SL SS filter press
    2021: 27.1 gallons

  3. #3
    Join Date
    Apr 2019
    Location
    MN
    Posts
    4

    Default

    So will my pump that’s rated for 100gpd be able to run three 100gpd membranes?

  4. #4
    Join Date
    Mar 2013
    Location
    Campbellford, on
    Posts
    682

    Default

    The 100 gpd rating is based on how much permeate the membrane should produce in a day. So in theory, 3 membranes should produce 300gpd of permeate. What’s important is keeping the proper flow rate through each membrane which is partly determined by how they are configured (series or parallel). Keep in mind this is based on water not sap. Check what the required flow rate is for the membranes and pick your pump accordingly.
    Maple Rock Farm
    www.Maplerockfarm.ca
    400 taps on Vacuum
    18”x60” Lapierre propane evaporator with Smokey Lake auto draw off
    Homemade 3 post RO with MES membranes
    Ford TS110 tractor sap hauler

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