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Thread: delaval 78

  1. #1
    Join Date
    Apr 2009
    Location
    Margaretville, NY
    Posts
    131

    Default delaval 78

    I am looking into using our milker pump for a sap vac. Its a 16 year old Delaval 78. It was used everyday for 4 years then we used it about 1 week a year since. Once in a while a heifer freshens before sale. If I use this for a sap vac what would I need to do to it to make it work well? We will plan to keep it in the barn and run a line out to the bush to a releaser down at the bush.
    Millbrook Maple
    Catskill Mountains
    Store - Arkville, NY
    Saphouse - Somewhere in witness protection area.
    2.5 X 8 1990 Grimm Lightning
    600 GPH RO
    2000 Taps and growing each season
    30 Buckets
    Always looking for more sap!

  2. #2
    Join Date
    Oct 2007
    Location
    Elliottsburg, PA
    Posts
    1,864

    Default

    High Vac!!! above 20"

    So if you are going to use it for both you will have to have a way to adjust/switch between low vac for milking and high vac for sap sucking.

    A few ball valves and some line and I can't see why it will not do both.
    1st Generation Hobby Maple Producer, you got to start somewhere.
    222 Taps, all on Vacuum! No more buckets.
    Lapierre 2'x5' raised flue w/Hood and Preheater
    Surge SP11, Lapierre Hobby Releaser
    5" Filter Press made by Daryl
    Kabota RTV Sap Hauler

    Hardy's Maple Syrup on Facebook

  3. #3
    Join Date
    Sep 2003
    Location
    Whately, Ma.
    Posts
    2,847

    Default

    really all you will need is a releasr or a vac. tank. Most dairy pumps are set up to run around 15"Hg. for dairy. In maple it has been determined that higher levels are benificial. But running at 15" is better than none. you might be able to use the glass releaser from the dairy set up in the maple if you want to adapt it. Otherwise once you have your releasr set up you are good to go.
    Keith

  4. #4
    Join Date
    Apr 2009
    Location
    Margaretville, NY
    Posts
    131

    Default Releaser vac level

    I figured I would make a separate connection for using it for sap. Then I can connect it back when an "emergency" arises. My father-in-law is just about ready to give up on dairy heifers anyway. I'll do some research on what it would take to adjust the vac level. Our barn has a huge tank with a flapper on the bottom out in the alleyway which I think is a moisture trap, I'll have to ask for clarification from the boss. I'm not sure if I should make my connection after that tank or right at the pump. I don't plan to run the sap through the glass releaser that we have since then we would have to pull the sap uphill for about 1600 feet of line. I figured the vac 1600 feet down to the releaser and tank would work well but asking it to pull the sap 1600 feet and up hill about 50-100 feet of elevation would be a little much.
    Millbrook Maple
    Catskill Mountains
    Store - Arkville, NY
    Saphouse - Somewhere in witness protection area.
    2.5 X 8 1990 Grimm Lightning
    600 GPH RO
    2000 Taps and growing each season
    30 Buckets
    Always looking for more sap!

  5. #5
    Join Date
    Apr 2009
    Location
    Margaretville, NY
    Posts
    131

    Default One other thing

    The other thing I was wondering is how this pump handles constant use. Back when my father-in-law was milking he ran it about 3-4 hours at a clip. Can this pump handle 24 hour use with no modifications? Thanks for everyone's help with this one.
    Millbrook Maple
    Catskill Mountains
    Store - Arkville, NY
    Saphouse - Somewhere in witness protection area.
    2.5 X 8 1990 Grimm Lightning
    600 GPH RO
    2000 Taps and growing each season
    30 Buckets
    Always looking for more sap!

  6. #6
    Join Date
    Oct 2007
    Location
    Elliottsburg, PA
    Posts
    1,864

    Default

    You can use the moisture trap at the pump or/and put a moisture trap at the releaser. to be on the safe side you shouldn't connect directly to the pump with out some sort of moisture trap.

    You shouldn't have any trouble running it for long periods of time as long as you keep oil going to it and that you can keep it cool. The cooler the better.
    1st Generation Hobby Maple Producer, you got to start somewhere.
    222 Taps, all on Vacuum! No more buckets.
    Lapierre 2'x5' raised flue w/Hood and Preheater
    Surge SP11, Lapierre Hobby Releaser
    5" Filter Press made by Daryl
    Kabota RTV Sap Hauler

    Hardy's Maple Syrup on Facebook

  7. #7
    Join Date
    Apr 2008
    Location
    Jacksonport Wisc
    Posts
    4,377

    Default

    Pumps are stupid they dont know how long they have been working. Now if you reach the max temp of the pump and motor after an Hr then it wont matter. If it climbs as the day goes on then you need to change the cooling system.
    Last edited by Haynes Forest Products; 04-13-2011 at 07:21 PM.
    1100 on vacuum 3X10 Waterloo Small oil fired with pre heater. 24X36" gas fired finishing pans
    10X16 Evaporator room 16X24 kitchen+bottling room.
    vacuum pump called the BEAST new Gast vac pump
    2 Bernard double extractors
    7" filter press Allis Chalmers B
    Alot of family and friends to help
    Old yellow lab called Maple
    photobucket http://s853.photobucket.com/albums/ab91/cethaynes1noz/

  8. #8
    Join Date
    Feb 2005
    Location
    NY
    Posts
    72

    Default

    I ran the same pump on my lines this year sometimes 24hrs a day for days in a row. I was running 19" on it with no problems. My pump sat outside so plenty of air movement. The only modification I did to it was to add a reclaimer and get rid of the drip oilers. I think I could even run it a little higher with no problems.

  9. #9
    Join Date
    Apr 2009
    Location
    Margaretville, NY
    Posts
    131

    Default Good to know

    That is good news
    Millbrook Maple
    Catskill Mountains
    Store - Arkville, NY
    Saphouse - Somewhere in witness protection area.
    2.5 X 8 1990 Grimm Lightning
    600 GPH RO
    2000 Taps and growing each season
    30 Buckets
    Always looking for more sap!

  10. #10
    Join Date
    Feb 2010
    Location
    corfu, ny 14036
    Posts
    45

    Default

    delaval 78 pumps are good pumps but the oil will get too hot at 20", Unless you have a way to cool the oil i wouldn't run over 16-17 inches. The big tank above your alley is probably just a balance tank to equal out the vac between the line in the barn and act as a resivoir for when units are put on and suck air. The trap is mounter on the reciever with a piece of stainless pipe that is shaped like a horseshoe to keep splashing fluid from getting into the trap. The balance tank is not protected by the trap, only the reciever and ss pipeline. Also i am assuming you have a reclaimer on the exhaust, otherwise you will be blowing a ton of oil on the ground, the oilers should drip 1 or 2 drops every five sec, if you bump up the vac turn up the oil a little, a lot of people run the oilers wide open with 20 plus inches as we did this year, but our oil kept getting too hot so we made a cooler to keep temps reasonable. But alot of oil does not mean it will cool the pump better because you are just recirculating it through the exhaust reclaimer so you will just heat it up quicker. Your running temp is mostly determined by the amount of air going through the pump (cfm) as in leaks in the line or the vacuum regulator. Alot of 78 pumps run for 8 hours on farms at 15" so constant use should not be an issue.
    Last edited by arcticmaple8; 04-14-2011 at 07:25 PM.

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