SpudFiles

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).

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

Better yet, who makes those pumps?

My expresso machine pumps 18 bars.... so, better get some more informations!

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).

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?

Nitrogen is cheaper and requires less work

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

Or get a fridgy and push the 500 psi....

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