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Thread: Releaser hard on pump

  1. #1
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    801

    Default Releaser hard on pump

    I have a Lapierre vertical mechanical releaser 12” x18” It works flawless every year except for 1 thing.
    When it dumps it causes the vac pump to go down to 0 and freewheel then when the dump is done and flapper sucks back in it goes from pulling no vac to basically deadheading the pump. I spun 2 shafts on the vac pump the last couple years. Was able to fix them and strengthen them up so they don’t spin again. But it’s still pretty hard on the pump and motor.
    I was thinking of installing a vac line with a check valve to where the main lines come in to provide continuous vac. But when sap is running hard or when the vac is turned off this part of the releaser fills with sap sometimes full to the top untill vac in releaser matches the vac on the lines. Then it goes into the releaser.
    Gotta be an easy way to solve this.
    400 taps on vacuum
    Lapierre Releaser
    2x5 Phaneuf
    Auber auto drawoff
    Homemade arch with AUF
    Homemade RO single 4" MES 4040 membrane
    CDL 16 x 16 bottler
    Wesfab 7" short bank filter press
    Delaval 73's

  2. #2
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    5,006

    Default

    Put a check-valve between the pump and releaser to prevent this.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  3. #3
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    801

    Default

    I have a brass swing check valve on the pump. Without it the pump will spin backwards when it shuts off.
    400 taps on vacuum
    Lapierre Releaser
    2x5 Phaneuf
    Auber auto drawoff
    Homemade arch with AUF
    Homemade RO single 4" MES 4040 membrane
    CDL 16 x 16 bottler
    Wesfab 7" short bank filter press
    Delaval 73's

  4. #4
    Join Date
    Nov 2010
    Location
    Barnet, VT
    Posts
    2,502

    Default

    The way you describe it I don’t think your releaser is working properly.
    William
    900 taps plus 1200 purchased sap
    3 X 12 Thor pans on a Brian design arch
    1986 Seprotech 900 RO

  5. #5
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    10,454

    Default

    I agree with wiam. I never used a single mechanical releaser, both of mine have been doubles, but I doubt the design would be for what you describe. I advise you contact Lapierre, they should be able to trouble shoot on the phone.
    Dave Klish about 1320 taps in '15, downsized after I lost my help, about 450-500 planned for 2021 (and after?)
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    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

  6. #6
    Join Date
    Apr 2009
    Location
    Bristol, VT
    Posts
    1,858

    Default

    A also agree with Wiam. I had a single vertical for several years and it had two flaps. One on the bottom of the main chamber and one on the outlet of the mainline manifold. When the main chamber dumped the flapper on the outlet of the manifold would shut to hold vac on the mainlines. It seems like this is not happening in your case...
    About 750 taps on High Vac.
    2.5 x 8 Intens-O-Fire
    Airtech 3 hp LR Pump
    Springtech Elite 500 RO
    14 x 24 Timber Frame SugarHouse
    16 x 22 Sap Shed w/ 1500 gal. + 700 gal. tanks
    www.littlehogbackfarm.com

  7. #7
    Join Date
    Nov 2010
    Location
    Barnet, VT
    Posts
    2,502

    Default

    Is the vacuum in your top chamber going to 0? Sounds like you’re saying the vacuum on pump side of releaser is going to 0? If top chamber is holding vacuum then flappers are ok and the plunger either is not going full stroke or one of the o-rings could be bad.
    William
    900 taps plus 1200 purchased sap
    3 X 12 Thor pans on a Brian design arch
    1986 Seprotech 900 RO

  8. #8
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    801

    Default

    Top chamber holds vac 100%. Needle dosnt even move when it dumps. I took the plunger apart today and orings look perfect. Put a little food grade grease on them yo lube them up. Same thing. But releaser dumps perfectly.
    We have 1 more day to the season and I’ll be bringing it home and cleaning it. So I’ll fiddle with it then. I switched over to electric motors on the pumps this past couple weeks. So might look at getting an electric releaser for next year. See how it goes.
    400 taps on vacuum
    Lapierre Releaser
    2x5 Phaneuf
    Auber auto drawoff
    Homemade arch with AUF
    Homemade RO single 4" MES 4040 membrane
    CDL 16 x 16 bottler
    Wesfab 7" short bank filter press
    Delaval 73's

  9. #9
    Join Date
    Mar 2006
    Location
    Lanark, ON
    Posts
    2,226

    Default

    Bricklayer - we have 2 of these releasers that used to run off SP22 pumps (now on an Airtech on high vac) and we never had the problem you described. The pump would spin backwards if you turned off the pump without releasing the vacuum first. If it's filling up to the top and basically backing up into the header where the mainlines come in maybe you need to adjust the ring with set screws that limits the travel of the float on the float rod? If it's set too high it will let the chamber fill up too much.
    4,600 Taps on vacuum
    9,400 gallons storage
    3 tower CDL RO
    3.5'x14' Lapierre Force 5
    Twitter & Instagram: @ennismaple
    www.ennismaple.com

  10. #10
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    801

    Default

    Watched another exact same releaser yesterday do the exact same thing mine is doing
    I don’t think I explained the issue very well. So I’ll explain again.
    I have a delaval 73 running at 22” hg vac gauge then Check valve at the vac pump
    Vac line runs to releaser.
    2 x1” mainlines comming into upper releaser chamber.
    Vac level in upper chamber matches vac level on vac pump. And upper chamber needle does not move at all while releaser dumps. So flappers are working.
    When float trips the switch and releaser dumps the vac gauge on pump dosnt move.
    It’s when it’s finished dumping and the flapper closes and it switches back to applying vac to the main chamber is when the needle on the pump drops to 0 for a split second then hits back to 15hg then up to 22hg.
    I think this is what’s causing my pumps to break shafts. This hard hit multiplied over thousands of times through the season. The shafts never break at the start of season. Only usually towards end of season.
    400 taps on vacuum
    Lapierre Releaser
    2x5 Phaneuf
    Auber auto drawoff
    Homemade arch with AUF
    Homemade RO single 4" MES 4040 membrane
    CDL 16 x 16 bottler
    Wesfab 7" short bank filter press
    Delaval 73's

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