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Thread: Dow LP-4040 membranes

  1. #41
    Join Date
    Mar 2006
    Location
    Caledon, Ontario
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    2,176

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    Getting back to the question of DOW LP-4040 membranes

    After a few emails with folks at Dow, nobody would say why one spec says it is better at low temps and nobody would say better than what other membrane at low temps.

    The key seems to be to expect 3% reduction in perforance for every 1 deg C drop below 25. So we should expect a drop of 50 to 75% ..... before we get a build up of crud.

    And about warming the sap ... keep in mind that the max operating temp of most membranes is about 115 to 120 degrees. Check the specs on yours before going down this road too far. This is why the cut off temp for cleaning is pre-set.

  2. #42
    Join Date
    Feb 2009
    Location
    Honor, michigan
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    568

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    Shane is that 175-200 Full cords or face cords?
    Mike
    1000 taps on vac
    Delaval 78 vac pump
    rebuilt Vermont arch
    Smoky lake maple custom pans
    4 x 11 reverse flow
    Smoky Lake auto-draw
    Smoky lake 2x4 finisher
    wes fab short bank filter press
    600 gallon Zero tank and 4 cage tanks
    650 gallon surge tank
    Deer Run Maple 500 GPH RO
    https://www.facebook.com/WhaleysMapleSyrup?ref=hl

  3. #43
    Join Date
    Feb 2009
    Location
    Neillsville,WI
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    227

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    Whalems,that has to be full cord, because on mine in a good year I put 75 full cord through my rig

  4. #44
    Join Date
    Dec 2006
    Location
    Jordan, NY - 20 minutes west of Syracuse
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    Brent - thanks for the additional info. Let's keep this thread going in season so we can compare notes on best operating pressures and cleaning procedures for these membranes.
    Danno
    Just West of Syracuse
    3 x 10 Lightning
    Sihi Vacuum
    Sap Bros RO
    600 taps and buying sap

  5. #45
    Join Date
    Feb 2010
    Location
    vermontville michigan
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    507

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    Yes full cords, all this wood makes the place look like a mess, I have natural gas but, I was told it would cost 7 for a gallon of syrup so that would be 15 to 18 thousand dollars alone shane

  6. #46
    Join Date
    Feb 2009
    Location
    Honor, michigan
    Posts
    568

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    Are there any standing non maple trees standing in Vermontville??
    Mike
    1000 taps on vac
    Delaval 78 vac pump
    rebuilt Vermont arch
    Smoky lake maple custom pans
    4 x 11 reverse flow
    Smoky Lake auto-draw
    Smoky lake 2x4 finisher
    wes fab short bank filter press
    600 gallon Zero tank and 4 cage tanks
    650 gallon surge tank
    Deer Run Maple 500 GPH RO
    https://www.facebook.com/WhaleysMapleSyrup?ref=hl

  7. #47
    Join Date
    May 2009
    Location
    Barre, Vt
    Posts
    1,073

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    Shane, I too have 3 phase power in my sugarhouse. I am running a 1200 gal per hour RO, I would think you will be fine with what you are talking about. As far as burning wood..... with the RO you will cut everything down on the usage end. I burn oil I plan on using .6 gallons of oil to make a gallon of syrup. At 4000 gallons I will burn 2400 gallons of oil roughly $7500 in oil. I do all of this by myself as I do not have to gather like you. As far as boil time.... you are going to see a huge reduction in that. I use a 6x14 and plan to make 60 gallons of syrup an hour. I have a friend with a 5x14 who makes 45 gallons per hour. He runs the RO much heavier than I do. Good Luck with the RO
    Thad

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