second pass distillation bypass

It doesn’t work becusee you have other things to worry about like heads and multiple other fractions. Also vacuum is very unstable doing this. If you want to try this you need a few discharge pumps and you can use valve to go in and out of a fraction where you want it to go.

Your experience is hindered becusee of a leak or glassware or heater - there’s no reason why your runs should take that long. Ever.

What if you had ten mantles all daisy chained each with two condensers that lead to the pots I’m behind and in front of them and then pulled vacuum from either end after bringing each pot to a particular heat level?

No it’s stupid. There’s much much more efficient ways to do this

If you read the rest of the thread, making a more efficient second pass is the least of this guy’s concerns. He needs to get a vacuum gauges and pepper temp readings before even considering doing anything else

You guys are still focusing on the vac gauge. The napkin is utterly priceless!

Gonna save the pic and enter it for pic of the year.

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I didnt notice that lol. But what is the napkin even for? Holding the probe centered? Lol
Looks to have a probe gasket still.
I also see a probe in the flask. Am i missing something

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And theres no thermocoupler on the mantle temp probe.

Op
How in the world are you keeping-29.5hg?

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Its a thermowell. But yea wtf is that napkin doing there?

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Also, crank that heat up on your “heater” or risk a clog in the head. Most run 80c+, or hot condenser tek (150c)

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napkin is holding probe centered inside a glass thermo-well. no leak here.

I believe I can see a probe wire that is likely heading between the mantle and BF.

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You like my thermocouple? I’m still working or the kinks lol the paper towel is adding a little pressure so it sits right on the drop on the bottom of the thermowell

Use a zip tie or a small rubber gasket.

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add a little oil in the thermo-well to get better thermal contact.

I’ve used crude in a pinch.

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You can use vac pump oil

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So This last run was going much faster until, took me about 2 hours to go from cold all the way through terpenes, another hour for fraction 2, and when I was reintroducing vacuum, a piece broke off my threads (brand new piece, and I was super gentle) this cause a vacuum leak and it brought my flow rate to only about 130ml/hour, took almost 8 hours to get through my cbd fraction. I’ve got a yellow jacket on the way and am looking at a surface thermocouple for the mantle temp. For those asking, I’ve got the mantle thermocouple probe directly on the mantle for better control, one inside a thwrmowell in the flask, and one at the top of the head. Although slow, I’m pretty happy with them he results and appreciate all y’all help! Got roughly 1500ml from a little under 3L of 55% cbd crude. image|375x500

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Silica or sand works well too, then i just stuff papertowel around to keep the silica in.
Getting Oil in ur oil is no good, sand in ur oil is what the cool kids call CRC right?