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Espresso machines use 9 bar pumps. Hmmmn!
Posted: Thu Dec 17, 2009 9:06 am
by boyntonstu
Espresso pump > pneumatic gun.
Stirrup pump > espresso machine.
Thinking out loud.
BoyntonStu
(BTW the old style pull handle espresso machines were inadequate to create 9 bar).
Posted: Thu Dec 17, 2009 9:33 am
by jrrdw
Where did you dig up that information from? Just wondering...
Better yet, who makes those pumps?
Posted: Thu Dec 17, 2009 9:43 am
by CpTn_lAw
My expresso machine pumps 18 bars.... so, better get some more informations!
Posted: Thu Dec 17, 2009 10:48 am
by boyntonstu
CpTn_lAw wrote:My expresso machine pumps 18 bars.... so, better get some more informations!
Correct!
I was thinking:
Piston-driven
The piston, or lever, driven machine was developed in Italy in 1945 by Achille Gaggia, founder of espresso machine manufacturer Gaggia. The design generically uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grinds. The act of producing a shot of espresso is colloquially termed pulling a shot, because these lever-style espresso machines required pulling a long handle to produce a shot.
There are two types of lever machines; manual piston and spring piston design. With the manual piston, the operator directly pushes the water through the grounds. In the spring piston design, the operator works to tension a spring, which then delivers the pressure for the espresso (usually 8 to 10 bar).
Posted: Thu Dec 17, 2009 11:45 am
by CpTn_lAw
Oh , i see, nice, i didn't know it worked like that ^^ !! However, an expresso-machine pump doesn't have a very good flow....and they are a little bit louder than fridge compressors. Still, what idea(s ) did you have in mind?
Posted: Thu Dec 17, 2009 11:53 am
by velocity3x
Nitrogen is cheaper and requires less work
Posted: Thu Dec 17, 2009 11:58 am
by john bunsenburner
Couldn't of put it better my self, find the patent and rebuild it. I have seen it too, the 18bar one, and did think spudguns
Posted: Thu Dec 17, 2009 12:11 pm
by CpTn_lAw
Or get a fridgy and push the 500 psi....
Posted: Thu Dec 17, 2009 4:58 pm
by psycix
Are it liquid pumps? So.. are the pumps suitable for pumping gas?