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Thread: Backressure automatic control valve

  1. #1
    Join Date
    Feb 2017
    Location
    eau claire
    Posts
    75

    Default Backressure automatic control valve

    Does something like this exist? It's basically a pressure relief valve I think but it's meant to be controlling back pressure and not popping off in case of over pressure.

    I think most RO throttle the back pressure with a needle valve and slowly back it off in a recirculation type setup. I would like to maintain 220 psi and it be potable water/food grade. Ideally 3/4 threaded but I can make it work whatever you find. Lmk if you know of one.
    2016 7 taps= 1-2 gallons of syrup
    2017 135 taps on bags/buckets =17 gallons syrup on block arch
    2018 75 taps on bags/buckets in new locations =50 gallons syrup (2 month season) on insulated barrel stove with auf and hobby r.o.
    2019 less taps on different ground for 1 month season. 20 gallons. Added 4x40 RO membrane and never finished 2x4 cooker.

    Creator and Mod of Wisconsin Maple Syrup Producers on FB

  2. #2
    Join Date
    Nov 2008
    Location
    Howell, mi
    Posts
    820

    Default

    This is close:
    https://www.zoro.com/watts-pressure-...00/i/G0274723/

    Reading your post, I get the impression you want to auto-regulate membrane pressure in an RO.
    If thatís the case, I donít recommend this approach.
    42.67N 84.02W


    350 taps- 300 on vacuum, 50 buckets
    JD gator 625i Sap hauler w/65 gal tank
    Leader 2X6 drop flue

    Homemade auto draw-off
    Homemade preheater
    Homebrew RO, 2- xle-4040's
    LaPierre double vertical releaser
    Kinney KC-8 vacuum pump

    12X24 shack
    Lots of chickens and a few cats.

  3. #3
    Join Date
    Oct 2006
    Location
    Garrettsville,Ohio
    Posts
    378

    Default

    buy a food grade gate type valve. put it on the exit side of the membrane- permeate line. there has to be a electronic shut off when pressure is too high. those can be bought at any dealer or electric shop, wire to pressure pump
    Fred Ahrens
    330-206-1606
    Richards Maple Products
    Ohio CDL sales rep
    1500 taps

    dont take life too serious, nobody gets out alive anyways

  4. #4
    Join Date
    Feb 2017
    Location
    eau claire
    Posts
    75

    Default

    Yep that's what I'm trying to do tweegs. I'm almost tempted to try and make one. All it is, is a higher spring pressure in a spring loaded check valve. Find the right spring and you are golden.

    Fred- I'm confused and also intrigued to what you are saying. Why the permeate line?
    2016 7 taps= 1-2 gallons of syrup
    2017 135 taps on bags/buckets =17 gallons syrup on block arch
    2018 75 taps on bags/buckets in new locations =50 gallons syrup (2 month season) on insulated barrel stove with auf and hobby r.o.
    2019 less taps on different ground for 1 month season. 20 gallons. Added 4x40 RO membrane and never finished 2x4 cooker.

    Creator and Mod of Wisconsin Maple Syrup Producers on FB

  5. #5
    Join Date
    Oct 2006
    Location
    Garrettsville,Ohio
    Posts
    378

    Default

    Quote Originally Posted by needmoremaples View Post
    Why the permeate line?
    that how the bigger units work. more pressure to the vessel with restriction to the permeate line forces the sugars out. the water comes out the center top, concentrate to the outside
    Fred Ahrens
    330-206-1606
    Richards Maple Products
    Ohio CDL sales rep
    1500 taps

    dont take life too serious, nobody gets out alive anyways

  6. #6
    Join Date
    Feb 2012
    Location
    Fond du Lac, Wisconsin
    Posts
    906

    Default

    Restricting the permeate side would allow all the sap to run around the outside of the membrane and no permeate would be produced. If you restricted both you are just hindering the unit as you would drop the pressure differential across the membrane and thus push less water through.
    Smoky Lake 2x6 dropflu pans and hoods on homemade arch
    Smoky Lake 6 gallon water jacked bottler
    Concentric Exhaust
    250 Deer Run RO
    325 taps

  7. #7
    Join Date
    Nov 2018
    Location
    Franklin, PA
    Posts
    19

    Default

    here's a much cheaper version

    https://www.tractorsupply.com/tsc/pr...t?cm_vc=-10005

    I have used this in the past with some success..
    2019 290 taps on 3/16"
    2018 20 taps on milk jugs
    2017 10 taps on milk jugs

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