Anyone have a chart that shows cfm loss as its related to ladder lifts?
CFM loss and lift
Anyone have a chart that shows cfm loss as its related to ladder lifts?
Matthew Cross
Madison, Ohio
400 taps on vacuum with surge sp-22
200 buckets
30 x 10 leader max
w/ enhanced steam away and Pre-heater
That might be covered in Steve Child's Tubing Handbook, available thru Cornell or most larger maple equipment dealers. I don't see much in practice, I have 26-27" vacuum of unknown CFM (old BB4 piston pump), at the end of my mainlines, I get 25" after 2 sap ladders. Both mainlines are 1", one is about 750' long and the other is only about 600' long and as stated both have 2 sap ladders between 7' and 10' lift on the longer one and a 5' lift and a 12' lift on the 600' main.
Last edited by maple flats; 02-21-2020 at 10:14 AM.
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.
Matt, Fred over at Richards Maple may have that info..just put a CDL sap lifter in over here, working like magic- so far.Originally Posted by CrossBroMaple
John Allin
14x18 Hemlock Timber Frame Sugar House 2009
Leader 2x6 w/Patriot Raised Flue Pan 2009
Leader Steam Hood 2014 - Clear Filter Press 2015
Leader Revolution Pan and SS Pre-Heater 2016
CDL Hobby 250 RO & Air Tech L25 Hi Vac Pump 2019
06' Gator HPX to collect wood & sap
14' Ski-Doo Tundra for winter work in the woods
Great Family 3 grown kids+spouses and 7 grand kids who like the woods
7th Gen Born in Canada - Raised in Chardon Ohio - Maple Capital of the World..<grin>.
I just installed two 10 foot ladders using 1/2 in riser and do have vacuum after the lifts just was curious about how much cfm loss occurs. I also am utilizing an old sp22 dairy vacuum pump with unknown cfm
Matthew Cross
Madison, Ohio
400 taps on vacuum with surge sp-22
200 buckets
30 x 10 leader max
w/ enhanced steam away and Pre-heater
I think the SP22 and the BB4 are quite similar in size.
On my BB4 I have a 1800 RPM electric motor with a 4" drive pulley, I think the driven pulley is 10", if that's correct, the pump is turning at 720 rpm. On my system I get 26-27" vacuum at the releaser and at the far end of the mains, after 2 sap ladders on each I get 24" on one and 25" on the other. One has about 220 taps, the other about 150 taps, but when done adding new this week the two combined will be somewhere between 400 and 450 taps total.
My thinking is that the vacuum at the far ends is more important than the CFM, as long as the ladders work properly. For this year my ladders are all on star fittings, my other woods which I've now retired had 3/4" risers, 2 each ladder. I'm thinking for next year I will change the ladders to 2 lift lines each of 1/2".
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.
Thanks everyone,
I do have vacuum after both lifts but curious about cfm for future tap expansion and new vac pump possibilities. as I read through the cornell tubing book it didn't have a definite answer in regards to lift systems.
Matthew Cross
Madison, Ohio
400 taps on vacuum with surge sp-22
200 buckets
30 x 10 leader max
w/ enhanced steam away and Pre-heater
Posting Permissions
Reply With Quote