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Thread: Distance between vacuum pump and releaser

  1. #21
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    7,598

    Default

    Different animal, but when I had irrigation for a strawberry farm I had a 3" fire pump to feed 3.5 acres of overhead sprinklers. At first I had a 3" suction line to feed the 3" pump, max lift about 8', then it pushed water thru a main trunk of 4", then gradually it got smaller until the ends of the lines were 2" pipe. I had issues getting good enough pressure to the ends of the 2" lines and they were only feeding 6 sprinklers at 60' spacing. I called the irrigation company to see about getting a bigger pump. They said all I had to do was change the suction line to 4". I did that and the pressure and spray pattern was good throughout the entire system.
    On vacuum you need to think similar, one size up often performs far better.
    Steve Childs, Cornell Maple Expert, has a notebook that shows the performance of various sizes and lengths of tubing. If in doubt, consult that.
    Personally I often use 1 size larger, if a pump has a 1.25" take off, I step it up to 1.5", if it has 1.5" I step it up to 2". But then you need to take distance into account, on long runs you may need even larger to get the best performance to the end.
    Dave Klish about 1320 taps in '15, down to about 700 in '16, up to 850 for 2018?
    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.daveandjoanssugarhouse.com

  2. #22
    Join Date
    Apr 2012
    Location
    poultney vermont
    Posts
    367

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    Sounds like you need more cfm.....I'm running 2000 feet 1 1/2 and releaser stays parked on 27-28 plenty of reserve vac in line to recover the loss from dumping while chambers swap. Double releaser with 5hp busch pump
    18x30 sugarshack
    1500 taps high vac on new busch pump
    900 taps on vp74, 400 with 3/16" 20-40' drop
    3x10 drop flue stainless
    7'' wes fab filter press
    springtech 600gph RO
    400 gal stainless bulk tank
    3-1550's
    4-275's
    more taps to come in '17

  3. #23
    Join Date
    Jan 2011
    Location
    Isle Minnesota
    Posts
    67

    Default

    My releaser is 400' from the vac. pump. I used 1.5'' pipe between the two. I didn't like how long the recovery time was after each dump so I installed check valves on each line coming into the releaser. What a difference. Instead of taking 13 seconds from the time the releaser trips and finishes dumping plus vacuum recovery, I'm down to 6 seconds and no loss of vacuum that I can measure via the gauge. Only the releaser is losing vac and not the lines.
    1st year 2009- 125taps
    2011- 250 on gravity
    2012- 300 on vac.
    2013- 320 on vac.
    Modified Leader half pint
    Custom pans from Smokey Lake Maple 2x8.5
    16x24 sugar shack
    JD-770 pulling trailer w/275 gal. tank & transfer pump

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