Amy thoughts on this unit?
Mod edit: RV5 115/230V, 1-ph, 50/60Hz, Factory set to 230V for Europe
For what application?
,9 cu ft vacuum oven
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so you threw the distillation tag in there why?
Ethanol recovery with cold trap
as in youâre finishing EHO in a vac oven, and want to know if a particular vacuum pump is useful and you tagged that process as âdistillationâ ?
around here (yep cannabis is weird), âdistillationâ and âdistillateâ are generally reserved for the process of distilling cannabinoids under high vacuum.
by tagging your âwill this pump work with my vac ovenâ as pertaining to âdistillationâ, you are implying a requirement for a much more powerful vacuum pump that you need.
it also makes it harder for folks looking to solve the same issue as yourself to locate an answer. (So Iâve edited your title, moved your post, and changed the tags).
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I would tend to use a diaphragm based vacuum pump for this particular duty.
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Thanks for the redirect. So is the pump a good option or not ?
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link the specs.
otherwise youâre insisting folks go look it up in order to help youâŚbecause it is not a pump folks are going to be running on a 0.9cu.ft oven.
will it work? sure. if you donât drown it repeatedly.
would I throw it away if it came with my oven? No, but Iâd find it a better home.
would I buy it for a 0.9cu.ft oven? No!
if I was going to set a Rotory Vane pump up to die on a vac oven (youâve got a cold trap, you might not kill it) I would throw something cheaper at the problem.
say
or even
https://www.harborfreight.com/3-cfm-two-stage-vacuum-pump-61176.html
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Agreed. It will absolutely work. Cold trap will certainly help.
Just seems like a lot of money for not the right toolâŚthe cheap RV pumps are also the wrong tool, but theyâre cheaper, so their early death isnât quite so tragic.
A diaphragm pump would be happier being assigned that task, and could be had for about the same price.
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He could just get a cheap rotary vane if heâs using a cold trap.
12cfm 2stage 155$ free shipping
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Wow!
That is certainly more suck for the buck than the cheap options I usually see pulling vac oven duty!
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I already went thru one of those blue hvac ones, fucking around with pumping up brownie mix. Apparently vegetable oil is corrosive to vacuum pumpsđ
That Robinair pump doesnât seem to have an oil mist filter available or even a way to attach one. I have one thatâs been sitting around that I have not really used for anything because of that reason. The exhaust flange is weird and I donât see how anything would attach to it. Do you happen to (or have in the past) use that particular pump?
EDIT: Actually, never mind. I think I just found a solution:
https://www.instagram.com/p/BRUM-IahrV4/?taken-by=henryholsters
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Understand that Iâm not calling the ronbinair a good solution. Just sufficient. With caveats.
I recommend cold trap and a check valve between the pump & the oven to prevent vacuum pump oil from diffusing or being sucked into your oven.
If youâre running ethanol in the oven, then a cold trap is even more important.
I havenât gotten a pump up to the auto-ignition temp of ethanol by swapping out the vac oil with ethanol, but I have heard tell of it being achieved, and the description included spitting fire in the operators face.
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On bigger ovens, dry scroll pumps make me happyâŚ
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Thatâs all I use these days if I can help it
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I get the impression they donât like liquid ethanol a whole lot. Iâve only got a single example that I think was killed that way, and it wasnât actually killed on my watch, so Iâm guessing at the actual cause, but given the duties it drew, it seems like a reasonable guess.