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Thread: Backressure automatic control valve

  1. #1
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    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 making 17 gallons syrup
    2018 75 taps =50 gallons syrup
    2019 70 taps making 20 gallons. Single 4x40 RO
    2020 bought 40 acres installed 250 tubing taps, 100 bags. 70 gal
    2021 500 taps with guzzler. 80 gal syrup + sold sap
    2022 600 taps 27 gal sap per tap on guzzler!!! 110 gal + sold sap

  2. #2
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    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 that’s the case, I don’t recommend this approach.
    42.67N 84.02W


    350 taps- 300 on vacuum, 50 buckets
    JD gator 625i Sap hauler w/65 gal tank
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    Homemade auto draw-off
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    12X24 shack
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  3. #3
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    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 Ohio Maple Equipment
    Ohio CDL sales rep
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    H&M maple fabricator Dealer
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    don't take life too serious, nobody gets out alive anyways!

  4. #4
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    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 making 17 gallons syrup
    2018 75 taps =50 gallons syrup
    2019 70 taps making 20 gallons. Single 4x40 RO
    2020 bought 40 acres installed 250 tubing taps, 100 bags. 70 gal
    2021 500 taps with guzzler. 80 gal syrup + sold sap
    2022 600 taps 27 gal sap per tap on guzzler!!! 110 gal + sold sap

  5. #5
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    Garrettsville,Ohio
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    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 Ohio Maple Equipment
    Ohio CDL sales rep
    LaPierre Dealer
    H&M maple fabricator Dealer
    Service Tech/repair for all brands and electronics

    don't take life too serious, nobody gets out alive anyways!

  6. #6
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    Fond du Lac, Wisconsin
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    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
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  7. #7
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    Nov 2018
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    Franklin, PA
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    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

  8. #8
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    That's what I'm looking for!! Thanks dude!

    Quote Originally Posted by iby View Post
    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..
    2016 7 taps= 1-2 gallons of syrup
    2017 135 taps making 17 gallons syrup
    2018 75 taps =50 gallons syrup
    2019 70 taps making 20 gallons. Single 4x40 RO
    2020 bought 40 acres installed 250 tubing taps, 100 bags. 70 gal
    2021 500 taps with guzzler. 80 gal syrup + sold sap
    2022 600 taps 27 gal sap per tap on guzzler!!! 110 gal + sold sap

  9. #9
    Join Date
    Feb 2017
    Location
    eau claire
    Posts
    101

    Default

    Quote Originally Posted by Super Sapper View Post
    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.
    I think we are baffled together. He had to have meant the opposite.
    2016 7 taps= 1-2 gallons of syrup
    2017 135 taps making 17 gallons syrup
    2018 75 taps =50 gallons syrup
    2019 70 taps making 20 gallons. Single 4x40 RO
    2020 bought 40 acres installed 250 tubing taps, 100 bags. 70 gal
    2021 500 taps with guzzler. 80 gal syrup + sold sap
    2022 600 taps 27 gal sap per tap on guzzler!!! 110 gal + sold sap

  10. #10
    Join Date
    Mar 2008
    Location
    Lake County Ohio
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    1,628

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    Quote Originally Posted by needmoremaples View Post
    I think we are baffled together. He had to have meant the opposite.
    Pretty sure Fred knows a "little bit" more about RO's than you think he does.
    John Allin

    14x18 Hemlock Timber Frame Sugar House 2009
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    Leader Steam Hood 2014 - Clear Filter Press 2015
    Leader Revolution Pan and SS Pre-Heater 2016
    CDL Hobby RO & Air Tech L25 Hi Vac Pump 2019
    06' Gator HPX to collect wood & sap
    14' Ski-Doo Tundra for winter work in the woods
    Great Family 3 grown kids+spouses and 7 grand kids who like the woods
    7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.

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