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Espresso machines use 9 bar pumps. Hmmmn!

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Espresso machines use 9 bar pumps. Hmmmn!

Unread postAuthor: boyntonstu » Thu Dec 17, 2009 9:06 am

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).
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Unread postAuthor: jrrdw » Thu Dec 17, 2009 9:33 am

Where did you dig up that information from? Just wondering...

Better yet, who makes those pumps?
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Unread postAuthor: CpTn_lAw » Thu Dec 17, 2009 9:43 am

My expresso machine pumps 18 bars.... so, better get some more informations!
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Unread postAuthor: boyntonstu » Thu Dec 17, 2009 10:48 am

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).
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Unread postAuthor: CpTn_lAw » Thu Dec 17, 2009 11:45 am

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?
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Unread postAuthor: velocity3x » Thu Dec 17, 2009 11:53 am

Nitrogen is cheaper and requires less work
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Last edited by velocity3x on Thu Dec 17, 2009 12:14 pm, edited 2 times in total.
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Unread postAuthor: john bunsenburner » Thu Dec 17, 2009 11:58 am

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 :D
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Unread postAuthor: CpTn_lAw » Thu Dec 17, 2009 12:11 pm

Or get a fridgy and push the 500 psi....
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Unread postAuthor: psycix » Thu Dec 17, 2009 4:58 pm

Are it liquid pumps? So.. are the pumps suitable for pumping gas?
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