Great video, and a clean explanation! A couple corrections: 1 - Ion pumps are UHV only, and require a high vacuum stage before them to start operating. You cannot start an ion pump from foreline, even if your forepump reaches practical limits(say, 1e-4 mbar). Titanium sublimation pumps _can_ start from rough vacuum, but their useful life is dramatically reduced in that operating mode. 2 - KF & viton _technically_ reach UHV, but baarely. You'll struggle to go below around 1e-7 mbar without suffering.

This is probably the best explanation of Vacuum Systems I’ve seen in KZfaq, absolutely AMAZING job!

25:19 Amazing setup *AND IT’S PRACTICALLY SKID MOUNTED?!?* stellar build!

That Melt-Banana poster got you a sub from me! I have a setlist with a sneaker-print from Yako's shoe. I asked her to stamp on it as a memento of a stunning gig at a tiny venue in Hull UK with Rika on bass. Such a fanboi... I'm working towards a high-vac setup to make a quadrupole mass analyser and some Gyrocyclotrons

Nice work! I like your drawing and your slow expansion of the system. We built our own chamber in almost the same sequence you did. But we still havn’t built the roughing bypass. We just patiently wait for the turbo to spin down….

Very interesting and informative. I like your system a lot, and the vacuum gauge is absolutely a thing of beauty and a joy for ever :) Good luck on your tube making journey and congrats on the conference! Cool tattoos too.

Sweet!

And then there's the Sprengel pump, which is both a roughing and ultra-high vacuum pump. It's just slow as hell.

Nice! looking forward to the next one.

Thank you so much for the video. I can't wait to reconsider some projects that required high-vacuum.

great video and very informative. Thank you

Thanks for sharing the video, it's very informative. Good work!

Great work and nice tutorial, thank you very much. Keep going.

Great job !!! Congrats 💚💚💚

nice setup!

THANK YOU, YOUR KNOWLEDGE IS NERY APPRECIATED.

great summary!

good work

GREAT VIDEO!!!!!!

Awesome, keep it up!

Amazing -thanks!

I'm here! thank you

This is gold

I learned a lot thank you🤘✌️

Great work! Do you plan to do anything with the chamber from the setup?

I watch a LOT of science, tech and tinkering YT and this is one of the best instructionals I've ever seen; you have a gift for this kind of presentation - the vacuum world is bizarre in terms of how its UOM evolved and its terminology - and you clarified it beautifully. Thanks a lot. How about tackling magnetism next 😉 another domain with a multitude of weird UOM and confusing interrelated concepts such as field strength, flux, flux density and magnetic force; if you "do" magnetism like you "did" vacuum you'd 10x your subscriber count.

As a former sputtering engineer, this is a good explanation. I do wish more of the vacuum pressure was used with torr instead of pascals as it is sort of a standard in the industry. I feel you could have touched on cryopumps, and while I understand they are a little outside the realm of a hobbyist, they also have great pump speeds with water that far exceed turbos for a similar pump size, not including external compressors. I appreciate your explanation on valves, gauges, and on the pumping measurement thought process, good job! Good luck on your vacuum endeavors and BTW I may also have a couple of varian rotary vane pumps, plus boxes of CF stuff taking up space in my garage, if you are still looking for anything....

Excellent video... I'm just a vacuum fan boy (my toy chamber just has an old fridge compressor) but i still love to watch the real thing on KZfaq. Europeans: "oh you Americans, who don't you use common units?" Units of pressure: "Hold our beer".

yeah melt banana !! good old days. Greetings from germany. Thanks for this summary vakuum course!

Excellent info. Most turbo-molecular pumps on E-bay are without controllers (power supply). What about home brewing that? Also, what about cryo pumps?

Excellent work! (MOCVD engineer here)

Great video! Thanks for all the info 🙌 I have a question for you, what adaptor (thread size) did you use to convert that harbor-freight rotary vane into KF25? I have a CPS (10cfm pro-set) vacuum pump that I want to upgrade to KF25 on the inlet port, I think using loctite or torrseal on the KF25 adaptor thread could give me a perfect seal for upgrading the original flare sae inlet into a KF system...

Hot damn this rules. Looking for exactly this info!

sorry for being late to the show but this looks very cool. whats the project all this is for.

Hell yeah!

You can actually rough through the turbo if your pirani gauge has contacts to control the on/off of the turbo. This means you can stop the turbo and open a vent line to vent the vacuum chamber. This removes the need for all the isolation valves.

I’m just trying to get components for my simple 1 stage rotary vacuum pump to be able to do roughly accurate vacuum distillations but it’s been quite the struggle. Such a fantastic video though and super fascinating. What type of work are you hoping to do with this setup?

Its funny I built an almost identical setup at my compay a few months ago except we use scroll pumps since oil is the worst thing possible for our products. I used a Micro820 PLC for controlling everthing including controlling the turbos.

8:02 - Its interesting that there are no information about drag pump, all I'm able to know about them is hearing and reading about it but not able to get a description of what exactly it is and how it works. No videos of it, no pictures of it. I didn't know that the bottom screw spiral at the bottom of the turbomolecular pump is actually the dragmolecular pump, really interesting. Would be nice if you made a video about it and discussed the progression of early turbo molecular pumps, I know that drag pump was the first molecular pump of it's kind then came the turbo pump. 24:07 - Smart, in a professional setting I bet they do the same. Imagine needing to keep track of 40 valves and lost track of one valve... that would jeopardize the experiment and could even be a disaster, digitized valve system is more safe and organized. Excellent explanation on the subject.

Hey fyi, ebay has, at least last time I used it a buyer protection system, if you dont get your item within the set delivery time or its wrong etc you can get a refund from them no questions asked. Great video.

You use a ReMarkable too! How did you create your recording setup with it?

Crycoolers if another way to achieve high vacuum. During tests for repairs, our chambers get as low as 3x10^-7 with a Roughing Pump + a TMP evacuating the chambers. And our goal isn't high vacuum, it's testing heat load, so anything over 9x10^-5 is just a consequence of the low temperatures and gas molecules condensing on the Radiation Shield. Now imagine if you had a dual chamber with a large butterfly valve and a way to actuate the head of said Crycooler in and out of the main evacuation chamber. You could pull a UVH, actuate your Crycooler into your main evacuation chamber in order to condense any extra molecules floating around (This has the added benefit that any molecules that don't cool enough to condense will still have less kinetic energy, thus decreasing it's mean free path allowing the blades of your TMP to better capture those slower molecules). After Extremely High Vacuum is achieved, you can then you actuate the cryocooler back into the secondary chamber and close the butterfly valve in order to prevent anything condensed on your Cryocooler from migrating back into your main chamber.

Came here wondering if it's possible to make a home-made DIY vacuum as pure as interstellar space and my my was I super disapointed when I heard that the moon's ever-so-barely-present """atmosphere""" is a way purer vacuum than anything possible even with this epic lab setup... Dang it... Now I need to go get me some space... gosh darn it, Skeeter... and here I was hoping that maybe I can somehow study the properties of empty space and special matter/material properties in it with a DIY setup but it looks like thats much harder to do than I am ready for. :/

При условии что механическим насосом будет достигнуто 10-3 Torr следующий насос ,например поршневой, может откачивать еще остающиеся молекулы газа при условии что система клапанов ( устройства управления газовым потоком) будет работать принудительно . Ему будет это делать легко не смотря что обьем полости , цилиндра будет большим (газ разряжен и насос будет работать в холостую). Копус может изготовлен из легких не сильно прочных материалов .

6:12 A diffusion pump is not even close to be common in the industry, that is a turbopump since they don't give away any oil or such what so ever.

15:10 youd been better off casting and smelting your own new pulley.. perhaps out of old brake rotors or somthing else that is cast iron.. you could used what was left of the original and still made out a pretty decent pulley.. ofcourse if any of this is within your skills though.. but it honestly isnt that difficult

It seem to me that you're going to lose a lot of conduction and take a long time to pump down if you have such a narrow-diameter pipe coming out of your diffusion pump intake. Wouldn't it be better to keep it wide right up to the point where you attach the tube you want to evacuate, and only narrow it there?

😎 ρɾσɱσʂɱ

How many times do I need to mark this shit with “ don’t show again” ?