+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 20

Thread: Recirculation needle valve and where to plumb lower end

  1. #1
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default Recirculation needle valve and where to plumb lower end

    I am thinking of putting in a recirculation side to my homemade ro. If installing the needle valve on the concentrate side. Where do I plumb the lower end or where does it feed into?
    Right before the sap enters the membrane on the bottom side?
    Attached Images Attached Images
    Last edited by lastwoodsman; 04-05-2020 at 11:55 AM.
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

  2. #2
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    969

    Default

    Put a tee right before your concentrate needle valve. Run the recirc to a separate needle valve. Then to a flow meter. Then to the intake of your High pressure pump.
    600 taps on vacuum
    Lapierre mechanical Releaser
    CDL electric releaser
    2.5 x 10 CDL Venturi ( new for the 2024 season )
    Home made modulating auto draw off
    Homemade RO 2 x 4" membranes
    CDL 16 x 16 bottler
    Wesfab 7" filter press
    Delaval 73 vacuum pumps

    12 hives of bees

  3. #3
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default

    Quote Originally Posted by Bricklayer View Post
    Put a tee right before your concentrate needle valve. Run the recirc to a separate needle valve. Then to a flow meter. Then to the intake of your High pressure pump.
    Should I tie into a existing flowmeter or add another?
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

  4. #4
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    969

    Default

    A separate flow meter. A flow meter on recirc line is not necessary. But it’s nice to have. Your concentrate flow meter is for concentrate out. Meaning concentrate being sent to head tank to boil.
    600 taps on vacuum
    Lapierre mechanical Releaser
    CDL electric releaser
    2.5 x 10 CDL Venturi ( new for the 2024 season )
    Home made modulating auto draw off
    Homemade RO 2 x 4" membranes
    CDL 16 x 16 bottler
    Wesfab 7" filter press
    Delaval 73 vacuum pumps

    12 hives of bees

  5. #5
    Join Date
    Dec 2013
    Location
    Stockbridge,Ma
    Posts
    285

    Default

    What is the advantage to installing a needle valve for recirculation verse just redirecting the concentrate back to the sap tank and letting it recirculate till you get it to the concentration level you want then sending it to your head tank?

  6. #6
    Join Date
    Mar 2011
    Location
    North Grenville, Ontario
    Posts
    969

    Default

    Quote Originally Posted by bill m View Post
    What is the advantage to installing a needle valve for recirculation verse just redirecting the concentrate back to the sap tank and letting it recirculate till you get it to the concentration level you want then sending it to your head tank?
    This method works as well. I’ve used it before to achieve higher concentration. But it takes a long time. You are constantly adding concentrated sap to fresh sap. Then sending it through RO again.
    I just find that with a recirc line I get better results. I run my recirc at 5gpm on my RO. And .75 gpm of concentrate.
    This gets me boiling 30 minutes after I start RO and have enough in the head tank to fire up. By the time I’m boiling I have 40 gallons on head tank and it stays that level till RO shuts off.
    The recircung back to sap tank takes hours untill you have an even concentration.
    600 taps on vacuum
    Lapierre mechanical Releaser
    CDL electric releaser
    2.5 x 10 CDL Venturi ( new for the 2024 season )
    Home made modulating auto draw off
    Homemade RO 2 x 4" membranes
    CDL 16 x 16 bottler
    Wesfab 7" filter press
    Delaval 73 vacuum pumps

    12 hives of bees

  7. #7
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default

    I experience as well.
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

  8. #8
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default

    Quote Originally Posted by Bricklayer View Post
    A separate flow meter. A flow meter on recirc line is not necessary. But it’s nice to have. Your concentrate flow meter is for concentrate out. Meaning concentrate being sent to head tank to boil.
    Thanks for all the input !!!!
    Last edited by lastwoodsman; 04-05-2020 at 11:59 AM.
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

  9. #9
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default

    Quote Originally Posted by Bricklayer View Post
    This method works as well. I’ve used it before to achieve higher concentration. But it takes a long time. You are constantly adding concentrated sap to fresh sap. Then sending it through RO again.
    I just find that with a recirc line I get better results. I run my recirc at 5gpm on my RO. And .75 gpm of concentrate.
    This gets me boiling 30 minutes after I start RO and have enough in the head tank to fire up. By the time I’m boiling I have 40 gallons on head tank and it stays that level till RO shuts off.
    The recircung back to sap tank takes hours untill you have an even concentration.
    My experience as well
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

  10. #10
    Join Date
    Mar 2010
    Location
    Sandstone, Minnesota
    Posts
    483

    Default

    Quote Originally Posted by lastwoodsman View Post
    Thanks for all the input !!!!
    Are you using the same type of flowmeter as on my panel or some type of inline meter?
    Scarlet Jewell Sugar Shack LLC
    Sandstone, MN 55072
    16 x 24 sugar shack
    crescendo auto drawoff,

    Home built ro with a Dow xle 4040 membrane.
    1 1/2 hp motor on 220 drawing 8 amps
    Gravity feed


    300 taps on vacuum

    2 x 6 Smokey Lake Corsair arch with blower and pans and preheater
    1529 Massey Ferguson, Yamaha Wolverine

    https://www.facebook.com/ScarletJewellSugarShack

    Instagram. Mapleshack

    http://www.youtube.com/watch?v=AOnmFMBgU10

+ Reply to Thread
Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts