I’m curious what rates people are getting from the 20L rotos with dual condensers like this one I found. It’s spec’d at 12L/h, but that’s the same rate as what is advertised with the single condenser rotos I’ve seen.
https://www.ebay.com/itm/Toolots-WTRE-20dual-5-3-Gallon-20L-Rotary-Evaporator-with-Dual-Condensers/223509974551?hash=item340a3b8e17:g:VUAAAOSw4Jlc1HPR
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I have an AI 20L. Nothing special it’s only single condenser and receiving flask with a Welch 2502 diaphragm pump.
Right now I’ve been pulling ~10L/hr with pretty basic settings. No idea what it would do if I pushed it hard but I don’t wanna risk breaking glass.
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running a china 20L single condenser with small aux condersor,and as hot as I could comfortably go, and also as cool as I could get
I got to 30 gallons in an 8 hour shift… for whatever that’s worth…
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I just realized I’m at 5,000 feet above sea level. So I guess I’m actually pulling somewhere along the lines of -27”hg?
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No more glass for me, I’m getting 20l an hour @ 38c vac wide open.
Here’s the condenser.
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I’m noticing vapor go straight up past the top coil into my vacuum pump at 23”hg 50C water bath
Chiller is set at 0C, has anyone had a problem like this where the chiller seems to be okay temperature wise but the coil is not condensing?
How fast does the chiller push the liquid around?
The only times I’ve seen that are when I’ve had a vacuum leak or not using a cold trap, is the coil not condensing at all?
When I pull tok deep of a vac with my welch wobl, I noticed this as well. I was/am using tap h20. I do use the waste water for my garden.
I now keep vac at -26.5hg and no more vapour into my pump.
My chiller should be fixed soon. Hopefully with much colder condenser fluid, I should be able to do +50% more volume.
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When I notice this I twist the knob to pull less vac but I notice the vapor still makes its way up.
I’ll post a video later but i dont think this should be happening
details on that motor and passthrough?
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Found my problem!!! Was the cheap ass bestvaluevacs cold trap i was running in between my rotovap and dpump
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I actually am facing the same problem as you are right now with my Lanphan RE501 and Welch diaphragm. What exactly was wrong with the cold trap?
I have the same setup, but I never use a cold trap. 48c water bath, -26.5 +/-.x, and zero vapor past the 2nd to last coil.
Which chiller do you use?
Seal. Its the cheap one from bvv. https://www.bestvaluevacs.com/1-5-gallon-cold-trap-2qt-tank-dry-ice-liquid-nitrogen.html
Lol
Tap h20 currently
My -20c is being repaired
Damn so you use tap h20 and get a gallon an hour?