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Thread: Vacuum generators

  1. #1
    Join Date
    Mar 2015
    Location
    Esko,MN
    Posts
    206

    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
    2019: No tapping
    2020: ?

  2. #2
    Join Date
    Mar 2015
    Location
    Westfield, NY
    Posts
    167

    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 05:35 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, 72 taps
    N 42* 18' 31."
    W 79* 34' 15."
    https://www.saptapapps.com/map/31868...-aab748a6394e/

  3. #3
    Join Date
    Mar 2015
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    Esko,MN
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    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
    2019: No tapping
    2020: ?

  4. #4
    Join Date
    Jan 2017
    Location
    Williston, VT
    Posts
    71

    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
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    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, 72 taps
    N 42* 18' 31."
    W 79* 34' 15."
    https://www.saptapapps.com/map/31868...-aab748a6394e/

  6. #6
    Join Date
    Mar 2015
    Location
    Esko,MN
    Posts
    206

    Default

    Thanks. Will check that out.
    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
    2019: No tapping
    2020: ?

  7. #7
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    9,757

    Default

    That is a new concept to me, I read what Gast says, but I'm unsure. Do you have the air pressure to make it work? I did not read how many CFM of air pressure at what PSI is needed to make that work.
    Dave Klish about 1320 taps in '15, down to about 700 in '16, up to 1000 for 2019?
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    added a gooseneck equipment trailer and F350 to tow it to haul more sap
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    http://s1041.photobucket.com/albums/...anssugarhouse/
    website: www.cnymaple.com

  8. #8
    Join Date
    Mar 2015
    Location
    Esko,MN
    Posts
    206

    Default

    Flats

    Do you have the air pressure to make it work? I did not read how many CFM of air pressure at what PSI is needed to make that work.
    For this particular vacuum generator, it uses 4.9 CFM of air at 68 psi.
    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
    2019: No tapping
    2020: ?

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