开云体育

Watchoo mean, Simon? I got a dial right THAR on my vacuum pump and it says plain as day that Ah get down to a pressure of ZERO. And that means there ain't a single molecule or atom of air in that thar

Nothing gets to zero. ;-) Mine is getting to 70 microns (0.07 millimeters of mercury, 0.001 kiloPascals, 0.01 millibars). Sounds like you might have a leak. ----- Get a free science project every

It is unnecessary to attempt to produce a vacuum lower than the vapor pressure of water at room temperature. The device in question WORKS at the vapor pressure of room temperature water vapor. The

I bought the next step up (theoretically) - a 2 stage for about $130. Trouble is - when I obtained a vacuum gauge, it gets nowhere near zero! Brian W

I suggested solder. 4. Using a port from a running internal combustion engine. What we have not considered yet is a staged system. Use some easy and cheap methods like this one to get as far as

pump filter, Aspirator (PY910) and a 12 water pump like found at harbor freight with garden hose fittings for $29.00 will give with cold water a 28.5+ vacuum I use one for vacuum filtering.Ed Our

S, Simon Quellen Field pi?e: Hello... Wery close. I want *to do/MAKE* that and not to buy. I love to DIY stuf. Christopher Erickson point to the RV rafrigerator with wery good link how that stuf

Maybe paraffin wax (candle wax) would do the trick. Heat it to a vapor, fill a tank with it, and cool the tank with running water. Decently low vapor pressure too. Boiling point is around 350 Celsius.

I agree with Christopher Erickson. However, I also frequently encounter people who *really *want to do something a particular way, even if there are better ways to do it. We might try to talk someone

Guy, All depend on your work intensity and accuracy. Do not open diff.pump at pressure above specified, provide right water cooling and heaters power, keep a specified baking pressure and it will work

How often do you experts clean out and replace the oil in a roughing pump? How about in a diffusion pump? We did the Diff pump about 10 years ago, and found all kinds of interesting stuff had fallen

It isn't an emotional issue, just a pragmatic one. You say you want a solution but have shot down every single last practical suggestion that anyone has come up with for you. What people here have

S, Thomas Janstrom pi?e: What you guys hate vacuum? That's correct. Just have little too much humidity here. Can't go under 20 centigrade. (just calculated not tried) But I rely on same efect. Just

S, ed ward pi?e: Did you ever tested thermoelectric element? These one on link claimed input of 65W of electricity. And peltie'r element are aprox 30% eficient. But that doesn't mean 65W*0.3 =19.5W!

I agree Ed, plenty of ways to skin this cat. The easier ones don't involve vacuum and can be done for low cost too. On that note wonder what the humidity is where he is, if it's low enough then he

Get a thick foam cooler and a thermoelectric cooling device and run it off you car or a couple batterys and a solar

S, Thomas Janstrom pis(e: The only source of CO2 here (that I know) is fire extinguisher. And is little expensive to refill.

S, Gomez Addams pie: Hello... Well That could be solution but have two problems. The budget and the other one is more complicated. I have no sun. Ie all around me are the high tree's and have shade

Incidentally if you have access to compressed food grade CO2, then you can make your own CO2 snow and bricks with the acquisition of an adiabatic cooling box thingy, new they run ~U$400ish used a lot

IF it were me, I'd put a bunch of PV panels on the roof of the lodge and use a conventional 12V RV refrigerator. But if you've no budget, I think you're going to be doing a lot of building and manual