My current vacuum source and a little thought on the topic

Osmosis Vanderwaal

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Uh, did he do that? Thats fine with me I have math autism. It shreiked at 711.2mm/hg though, 740 mm/hg? 14.7psig? 1 tor? 740 pascals? All that dont matter anyway because unless younare on a boat in the ocean its all wrong. I'll tell you vacuum is some ofnthe least understood shit. Measuring it i mean. If at.mpressure isn14.7 psig and absolute vacuum is 0 psig, then when you pull a vacuum, is it negative psi? Do you say, " minus 13 pis, minus 13.5 psi, minus 14 psi, minus 14.5 psi, minus 14.6 psi, 0 psi. Of course you cant achieve 0 psi, but you see what im saying?. I'm just kidding around, don't take the red pill of pressure.
 

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erhhh , no, these things are immiscible
Common Sense / Trump
 
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Thats right, measurement of 1 meter is defined by the distance your eyelids travels from open position to closed position that is 1 meter. where as 1 yard is defined as the distance that one of your eyelids (left one only) travels from the fully open position to the fully closed position, as long as your looking top dead centre* center*
 

SoldadoDeDrogas

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All these different systems of measurement have been around and have come and gone for milennia. Sacred geometry/divine proportions comes from observing and measuring phenomena in nature and recording the patterns etc. Nobody made these up or decided their actual foot was going to be a standard unit one day. For example, it isn't a coincidence that there are 12 months, 12 apostles, 12 inches etc. The original system wasn't any one, but an ecclectic blend of all we know, it was a combination and there were formulas for conversions etc. If you go and look at alot of the monuments and monoliths and other sacred sites around the world you will find that they have measurements with all these proportions and ratios in these different systems of measuring, simultaneously. You'll notice these same numbers over and over, 3, 10, 12, 33, 48, 108, 555 etc. 432 is in there, fibonacci sequence, PHI/golden ratio 1-1.618, and many others - through different systems and disciplines, standard/metric etc. from music, architecture, engineering, astronomy to chemistry etc. when you go to compare them. This just scratches the surface of some very deep stuff if you're interested in these types of rabbit holes. The things people in high places don't want you to know.
 
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Idontcarethatmuch

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Idk what y'all need but I once bought a "water circulating vacuum pump" the one with the blue bin you can find on all the chinese sites. It is able to do 20l/min sucction and 80l/min water pumping. With ice inside the bin it works with my 5l rotovap just fine for all I do. And it costs under 200€.
 

lalalander

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What about fridge compressors?
 

lalalander

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What keywords should I use to find these exact pumps? Are they originally used for pumping water? Thanks.
 

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"water circulating vacuum pump" as I said
No it does both vacuum and water circulation.
 

Osmosis Vanderwaal

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Not sure what you are saying but yes, the vevor and similar pumps with reservoir made for chemistry use a water circulating rotary pump that pumps both and is a very efficient design
 

Osmosis Vanderwaal

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A refrigerator compressor is FAR more powerful than this it has disadvantages though. The exact one in the op is named "Vacuum Pump Dc 12V, Large Vacuum Pump Transfer Pump, Large Low Noise - 90 ~ 350kpa 24W 10 ~ 20L / min DC12V / DC24V / AC220V (DC24V) Mini Vacuum Pump"
 

lalalander

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I'll be applying vacuum to the system via a regulator, so I expect the risk of implosion to be very low. But I don't know if cooling a compressor running for extended periods with a powerful fan will be sufficient. I'm more concerned about sudden/catastrophic accidents, such as a compressor exploding during distillation, etc. Are these fears unfounded?
 

Osmosis Vanderwaal

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Mmostly, yes. The issue is these pumps aren't designed to pump hydrogen chloride ammonia and shit like that and it eats them fast then the vacuum drops and you need a new one
 

lalalander

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Thank you so much. I will only vacuum distill P2P etc.
 
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