How much vac should a delaval 75 produce before it causes damage to the pump. And how do you regulate the vac. thanks
How much vac should a delaval 75 produce before it causes damage to the pump. And how do you regulate the vac. thanks
I used to run mine at about 19". That was with a box fan blowing on it, but no oil reclaimer. It would run pretty hot, close to spit sizzle hot as Parker would say. Had a couple times where the vac regulator froze up and pump was running at 23-24", but would'nt want to do that for long.
Danno
Just West of Syracuse
3 x 10 Lightning
Sihi Vacuum
Sap Bros RO
600 taps and buying sap
I am no expert but my neighbour is and works on all old dairy pumps, etc. He tells me the 75 should not be run continuously much higher than 15. I have had mine up to 20 -22 but not for long, I usually run it about 14 which I hope extends the life of the ol' 75. I have a Zero vac tank which has an unused vac line with the original valve available and I crack the valve a little to set the right vac. I also use a small fan on the pump when the outside temps start to increase.
Works for me.
2 1/2 X 8 D. & G. (new to me for 2012)
new CDL 125 RO for 2020
600 taps - tried vacuum with old Surge dairy pump in 2011 and worked great
half on vacuum and half on 3/16"
400 gal. Zero tank
Kubota 3540 and Cub Cadet splitter
Wild turkeys and deer to keep me company
Grandkids used as taste testers!
19 -20" on mine too with a box fan ...but yeah uses a lot of oil. Worked good till the releaser didn't release and slugged sap into it.....
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Jim & Charlene Desjardins
Belchertown MA.
Had a good 13 year run, but circumstances ! and loss of tree use.. we are ending the Maple thing for now... maybe be back in a few years
www.Desjardinsmaple.com
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Longbeard is right on when he says 15'' vac. I was told by the guys at the dairy supply not to push it past 15'' and it will work just fine.
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