Spoke with Dow today and they recommended the Mark E4 over the XLE4040. Is anyone familiar with this filter? Is it fairly new?
Spoke with Dow today and they recommended the Mark E4 over the XLE4040. Is anyone familiar with this filter? Is it fairly new?
The Mark E4 is the 4'' version of the Mark E8. Better performance than the NF70-4040 and NF90-4040 with similar mineral rejection.
Lapierre had some Dow Rep.s at their open house and they were very helpful. The Mark E4 and E8 were designed for sap, not water...different membrane material I guess...and these are the latest and greatest for sap concentration. Supposedly they don't pass any sugar or minerals, but I don't know how they flow in comparison to other membranes. Currently, these are only available from maple suppliers.
Josh
2009 - 370 on vac. & 16 buckets
2010 - 377 on vac.
2011 - 590 on vac.
2012 - 620 on high vac., 170 buckets, 110 on gravity tubing
2013 - 830 mine + 800-1000 others
2014 - 870 mine + 800-1000 others
2017 - 920 mine + 500-700 others
2018 - 902 mine + 500-700 others
2019 - 902 mine + 700 others
2020 - 902 mine + ???? others
Atlas Copco Pump
2.5'x8' 802maple Special with Dallaire pans
H2O Innovation 600gph RO
Spring Harvest Website
The simple answer is if one is faster then another on the permeate side , it is passing minerals or sugar of some kind.
Success is not final,failure is not fatal.It is courage to continue that really counts
“I have not failed. I’ve just found 10,000 ways that won’t work.”
– Thomas Edison
If that's the case, then why does the XLE (99% retention) flow faster than the NF-90 (85-95% retention)?
Josh
2009 - 370 on vac. & 16 buckets
2010 - 377 on vac.
2011 - 590 on vac.
2012 - 620 on high vac., 170 buckets, 110 on gravity tubing
2013 - 830 mine + 800-1000 others
2014 - 870 mine + 800-1000 others
2017 - 920 mine + 500-700 others
2018 - 902 mine + 500-700 others
2019 - 902 mine + 700 others
2020 - 902 mine + ???? others
Atlas Copco Pump
2.5'x8' 802maple Special with Dallaire pans
H2O Innovation 600gph RO
Spring Harvest Website
Amber Gold according to Dow info the XLE do not flow faster than NF-90. XLE has better retention and more surface area but is slower tha NF90. NF 270 fastest flow but has least retention of the 3. If I remember correctly the Mark 1 fall some where between NF 270 and NF 90 with better retention and also has more surface area. I have not seen the data but some must have it to compare where the new Mark E4 & E8 are flow wise.
1700 Taps /1600 on Vac. 3x10 King evaporator
20 head Charolais cattle
8 head Lowline Angus
28 Miniature horses
90 hives honey bees
JD 4430 tractor
I can only tell you what my experience was with the Mark 8's this past season.. I have 4 8 x 40 membranes in a new CDL RO. I was able to take 1% and turn it inot 12% in a single pass with flow rates of 3.5 gpm concentrate and 26.5 gpm permeate. I could not find any passed sugar in the permeate. Not very scientific, but I reduced the permeate in the microwave by boing a cup down until there was almost none left then put it in the refractometer and it still read 0. I was very pleased with them. Also when runing the machine with 1% sap the highest pressure I achieved was 330 psi.
shrunken producer, from 8,000 taps to 4,000 to 5800 to 9500 to 11,000 vac
5x16 woodchip fired evaporator with 5x10 max flue and 5x6 revolution front pan
CDL 20+ RO
Double 10"filterpress
sp-11, bb2, airtech L63, L160, L230 vac pumps
CDL low profile electric releaser
MES 8000 electric releaser
CDL 4000 tap mechanical releaser
We had a new Mark 8 membrane this year and were very pleased with it. Passed no sugar, ran on low pressure 300ish (like Lew said) and no issues or problems. It replaced a Hydranautics that passed sugar (unsure as to why) and was almost twice as expensive as the Mark 8.
I have the Mark E8 . It works great. Passes zero sugar. I ran around 350 psi and had great flow. Hope this might help .
The XLE is way faster than the NF-90 because the NF-90 fouls out real quick. My NF-90's went in the trash after the first year.