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Thread: Vacuum generators

  1. #1
    Join Date
    Mar 2015
    Location
    Esko,MN
    Posts
    189

    Default Vacuum generators

    I am planning to install a traditional 5/16 tubing system and am looking at different ways to get high vacuum (26 in Hg). My system will have an 800' vacuum line and a similar length returning sap line with needing to lift approximately 20'. I am wondering if a vacuum generator rather than a vacuum pump could be used to generate the vacuum needed for the system. I was wondering if something like the Gast VG-260-02-00 could be used to create the vacuum?
    Chad

    2014: 12 taps, 5 gal buckets
    2015: 15 taps on bags
    2016: 150 taps: 100 on bags, 50 on 3/16" natural vac, 2x8 AUF/AOF Homebuilt Arch, 2x8 SL Drop Flu & Auto Draw, SL Propane Canner/Bottler
    2017: 225 taps: Built Lean to, Added SL hood, preheater, concentric exhaust, SL SS 7" SB Filter Press
    2018: 180 taps: Added Shurflo to 50 - 3/16", Auto fill sensor to head tank

  2. #2
    Join Date
    Mar 2015
    Location
    Westfield, NY
    Posts
    118

    Default

    are you looking for something like this?
    http://mapletrader.com/community/att...9&d=1549490184
    It can also be set up with larger reservoirs or with a venturi and air compressor.

    The way this is set, my vacuum pump turns off at 26.5 inches +/- and on at 19 inches of vacuum. I went this route for my needs as it is quite. I did not want my air compressor running in the background generating all that noise so that ruled out the venturi arrangement.
    Last edited by Chickenman; 02-12-2019 at 06:35 AM.
    backyard hobbyist
    2014 - roasting pan on 55 gallon barrel -1 gallon syrup 6 taps on buckets
    2015 - added blower to door -3 gallon syrup 10 taps on buckets
    2016 - 3 gallon syrup and 2 lbs. sugar 16 taps on buckets
    2017 - new Mason 2x3 w/AUF shooting for 20 to 30ish taps and more sugar
    2018 - did not boil
    2019 - Added RO, sudo 8x8 sugar shack, shooting for 50 taps +/-
    N 42* 18' 31."
    W 79* 34' 15."
    https://www.saptapapps.com/map/31868...-aab748a6394e/

  3. #3
    Join Date
    Mar 2015
    Location
    Esko,MN
    Posts
    189

    Default

    I'm looking at the venturi vacuum generator. Something like this

    https://gastmfg.com/products/compres...s/vg-130-00-00
    Chad

    2014: 12 taps, 5 gal buckets
    2015: 15 taps on bags
    2016: 150 taps: 100 on bags, 50 on 3/16" natural vac, 2x8 AUF/AOF Homebuilt Arch, 2x8 SL Drop Flu & Auto Draw, SL Propane Canner/Bottler
    2017: 225 taps: Built Lean to, Added SL hood, preheater, concentric exhaust, SL SS 7" SB Filter Press
    2018: 180 taps: Added Shurflo to 50 - 3/16", Auto fill sensor to head tank

  4. #4
    Join Date
    Jan 2017
    Location
    Williston, VT
    Posts
    54

    Default

    I would have guessed that the vacuum generator is for when a mechanical system already uses compressed air and a vacuum line is needed to control a valve or something. I wouldn't think it would be efficient to generate compressed air and continuously release air just so one could create a vacuum system. But I'm really no expert.
    Ken & Sherry
    Williston, VT

    2017 - 13 gallons on 65 taps (12 buckets, rest 3/16), 2x4 flat bottom, modified cargo box sugarhouse
    2018 - 90 gallons on 418 taps (gravity lines), Leader 30"x10' Vortex Arch & Max Raised Flue with Rev Syrup Pan, New Sugarhouse
    2019 - Burned through alot more money: heated kitchen, 2x2,000 and 375 gal ss sap tanks, CDL1200 RO, Bauch Vac Pump, More taps, etc., etc., etc.
    https://www.facebook.com/pumpkinhillmaple/

  5. #5
    Join Date
    Mar 2015
    Location
    Westfield, NY
    Posts
    118

    Default

    Look at Joewoodworkers veneering vacuum press. He has a set up using a venturi system. In the gallery their are several examples of others builds that might fit your needs. For some odd reason my computer is acting up and I cant get a link to work for you.
    backyard hobbyist
    2014 - roasting pan on 55 gallon barrel -1 gallon syrup 6 taps on buckets
    2015 - added blower to door -3 gallon syrup 10 taps on buckets
    2016 - 3 gallon syrup and 2 lbs. sugar 16 taps on buckets
    2017 - new Mason 2x3 w/AUF shooting for 20 to 30ish taps and more sugar
    2018 - did not boil
    2019 - Added RO, sudo 8x8 sugar shack, shooting for 50 taps +/-
    N 42* 18' 31."
    W 79* 34' 15."
    https://www.saptapapps.com/map/31868...-aab748a6394e/

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