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How to use those CO2 inflators
On Thu, 11 Jul 2019 23:44:29 -0700 (PDT), AK
wrote: On Thursday, July 11, 2019 at 6:56:21 PM UTC-5, John B. Slocomb wrote: On Thu, 11 Jul 2019 15:37:39 -0700 (PDT), AK wrote: On Thursday, July 11, 2019 at 9:58:53 AM UTC-5, Frank Krygowski wrote: On Thursday, July 11, 2019 at 3:50:16 AM UTC-4, au76666 wrote: On Wed, 10 Jul 2019 17:56:13 -0700, AK wrote: I bought a package of CO2 inflator which clearly states it works on Presta And Schrader valves. It has nothing to depress the needle part of the inner tube valve to allow the gas in? Thanks, Andy Why, btw, is CO2 used? Why not plain air? I think it's because CO2 can be held as a liquid at room temperature and moderate pressure. As a liquid, a lot more CO2 can be stored in a tiny steel bottle. Storing an equivalent volume of air would require super cooling or extreme pressure. But I'm not a chemist. No guarantee is expressed or implied. - Frank Krygowski The company got back with me. Those cylinders are under 1000 lbs of pressure. So, it blows right past the needle valve of your inner tube. Andy I would be guessing that once opened and attached, it has a very short life before all leaking out. CO2 liquefies at different temperatures and pressured. At 70 degrees CO2 obtains a gas pressure of 852.8 psi when confined in a vessel. Much more explanations at https://www.justanswer.com/general/0...cartridge.html -- Cheers, John B. Guess you missed my post about those cylinders putting out 1000 psi. Andy Nope. I just said that at 70 degrees(F) the pressure of CO2 is 852.8. At higher temperatures the pressure can increase. In the neighborhood of 85 degrees(F) your cartridge will be in the neighborhood of 1,000 psi. From a table using PSIG the temperatures and pressures will be: At 50 degrees the pressure will be 638 psig 60 degrees- 733 psig 70 838 80 960 90 1190 100 1450 -- cheers, John B. |
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