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Thread: Clogged pre-filter on a CDL vacuum filter

  1. #71
    Join Date
    May 2011
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    Chatham NH
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    1,228

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    Hey Bap I have a friend that has the 12" vacuum filter and he hasn't had great luck with it so far. I gave him a 5 gallon pail full of DE to try, I told him to start with 3 cups to 5 gallons of syrup because that's what I use to start on my filter press. What do you think is a good amount of DE to syrup ratio?
    Nate Hutchins
    Nate & Kate's Maple
    2018 1000 taps?
    20x36 sugarhouse
    CDL 600gph RO
    Franken evaporator, lapierre arch, smokylake pans and a leader hood with pre-heater.
    A wife and 2 kids.

  2. #72
    Join Date
    Jan 2018
    Location
    OH
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    155

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    Quote Originally Posted by canaanmaple View Post
    Something to add. I have one, and noticed the later season stuff Ive been bottling with that unit, does have more nitre and getting a few gallons through it (ie: filling up the bottler) without having to change the filter is getting harder.

    But, I did just notice something the other day that I would say is a manufacturing flaw. The 3 tabs on the removable ring that you clamp down that holds the syrup, make contact with the flat filters and mesh filter piece BEFORE the entire outside of the ring. Making it impossible for an air-tight connection when clamped down. I plan to grind down the 3 tabs a little so the ring is the first thing to make contact and hopefully make a more air-tight seal. I will report back
    Have you tried adjusting the tabs? All 3 on mine have bolts that can be lengthened to adjust the tension.
    2020: 31 taps. 3 full size steam table pans on a custom 6x water heater natural gas burner setup.
    2019: 31 taps on silvers. Back porch gas cook top with 2 full size steam table pans. An amazing 14.9 gallons in my backyard!
    2018: 22 taps on 9 silvers. Propane turkey fryer and full size steam table pan on electric stove. I made 4.25 gallons in my backyard!

  3. #73
    Join Date
    Mar 2012
    Location
    Walpole, NH
    Posts
    1,096

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    Quote Originally Posted by n8hutch View Post
    Hey Bap I have a friend that has the 12" vacuum filter and he hasn't had great luck with it so far. I gave him a 5 gallon pail full of DE to try, I told him to start with 3 cups to 5 gallons of syrup because that's what I use to start on my filter press. What do you think is a good amount of DE to syrup ratio?
    Nate, that sounds about like what I am using right now given the amount of niter. Tell him that if it helps but still isn’t great try a little more.
    Sugaring for 45+ years
    New Sugarhouse 14'x32'
    New to Me Algier 2'x8' wood fired evaporator
    225 Sugar Maples Currently,(105 on 3/16" and 110 on Shurflo 4008 vacuum, 10 gravity), (16,000 before being disabled)
    1947 Farmall H and Wagon with gathering tank
    2012 Kubota with forks to move wood around

  4. #74
    Join Date
    May 2011
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    Chatham NH
    Posts
    1,228

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    Thanks Bap, I always figure its easier to use alot of DE and waste some than it is to use too little and fiddle around with syrup that wont go through the filters.
    Nate Hutchins
    Nate & Kate's Maple
    2018 1000 taps?
    20x36 sugarhouse
    CDL 600gph RO
    Franken evaporator, lapierre arch, smokylake pans and a leader hood with pre-heater.
    A wife and 2 kids.

  5. #75
    Join Date
    Feb 2018
    Location
    WV
    Posts
    104

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    Quote Originally Posted by canaanmaple View Post
    Something to add. I have one, and noticed the later season stuff Ive been bottling with that unit, does have more nitre and getting a few gallons through it (ie: filling up the bottler) without having to change the filter is getting harder.

    But, I did just notice something the other day that I would say is a manufacturing flaw. The 3 tabs on the removable ring that you clamp down that holds the syrup, make contact with the flat filters and mesh filter piece BEFORE the entire outside of the ring. Making it impossible for an air-tight connection when clamped down. I plan to grind down the 3 tabs a little so the ring is the first thing to make contact and hopefully make a more air-tight seal. I will report back
    grinding the tabs helped a little. I do notice the entire ring itself is not perfectly level/flat. Sitting it on a flat surface you can see light coming through in spots. Probably impossible to fix without a wide belt table sander. That being said, I think there are very many variables to using the cdl vacuum filter efficiently. Air tight connections, size of the vacuum, temp of syrup, and -very importantly- the speed of which you pour the syrup in! I found that to be a huge factor. Also, stacking pre-filters in the ring. I just use the orlon and one prefilter under the ring that gets clamped down. Then I pack 3 more pre-filters in. I can easily get 5 gallons through. The first 2.5 that fills it up, goes right through without changing a filter if you do it fast enough. Then I end up pulling out the pre filters one by one to get the next 2.5 gallons through which isnt a big deal. I do not use DE at all, but I do filter off the evaporator in a cone filter very close to syrup first. Then finish and run it through the vac filter.

    very decent unit still. Only problem is that it's too small for me, so I will be selling it and getting the higher capacity one for next season!

  6. #76
    Join Date
    Mar 2009
    Location
    Ashtabula County, Ohio
    Posts
    1,677

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    For those using the 12" vac filter, what are your vacuum readings? My vac gauge reads 6-7 hg using a new 5 or 6 hp shop vac. Jus wondering if these are normal vac levels for this unit.
    1000 taps on vacuum back down to 105 buckets
    2x7 A&A Raised Flue
    CDL 12" vacuum filter
    2019 Kawasaki Mule Pro MX Sap Hauler
    Past evaporators: Phaneuf 2x6, A&A 2.5x10, Smoky Lake 2x8 (oil then wood fired)
    Syrup made 2010:36 gal 2011:126 gal 2012:81 gal 2013:248 gal 2014: 329.5 gal 2015:305 gal 2016:316 gal 2017:258 gal 2018:147 gal 2019:91 gal 2020: 30 gal
    Tapping the same trees my great, great and great grandfathers tapped.

  7. #77
    Join Date
    Mar 2012
    Location
    Walpole, NH
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    Quote Originally Posted by heus View Post
    For those using the 12" vac filter, what are your vacuum readings? My vac gauge reads 6-7 hg using a new 5 or 6 hp shop vac. Jus wondering if these are normal vac levels for this unit.
    Heus, I am using a 5hp shop vac Rigid brand and I get 6-7 on the gauge.
    Sugaring for 45+ years
    New Sugarhouse 14'x32'
    New to Me Algier 2'x8' wood fired evaporator
    225 Sugar Maples Currently,(105 on 3/16" and 110 on Shurflo 4008 vacuum, 10 gravity), (16,000 before being disabled)
    1947 Farmall H and Wagon with gathering tank
    2012 Kubota with forks to move wood around

  8. #78
    Join Date
    Mar 2009
    Location
    Ashtabula County, Ohio
    Posts
    1,677

    Default

    Thanks BAP
    1000 taps on vacuum back down to 105 buckets
    2x7 A&A Raised Flue
    CDL 12" vacuum filter
    2019 Kawasaki Mule Pro MX Sap Hauler
    Past evaporators: Phaneuf 2x6, A&A 2.5x10, Smoky Lake 2x8 (oil then wood fired)
    Syrup made 2010:36 gal 2011:126 gal 2012:81 gal 2013:248 gal 2014: 329.5 gal 2015:305 gal 2016:316 gal 2017:258 gal 2018:147 gal 2019:91 gal 2020: 30 gal
    Tapping the same trees my great, great and great grandfathers tapped.

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