The Technology and Engineering Behind the 9Barista
9Barista is beautifully simple. It has no electronics and only one moving part.
The 9Barista espresso machine is a true innovation and a feat of coffee machine engineering. Designed by espresso fanatic and jet engineer William Playford, the machine produces real espresso on the stove top. How? By using the same principles as those found in jet engines; high pressures, perfectly controlled temperatures and precise engineering to bring it all together.
Read our Extended Explanation
9Barista produces real espresso by using a revolutionary, patented technology that sets it apart from all other espresso machines.
At its heart is a unique twin-boiler system. One boiler sets the brewing pressure, while the second regulates the brewing temperature.
The high-pressure boiler is heated on a stove top where it reaches 179ºC, increasing the pressure inside to 9 bar. As the boiler approaches the ideal brewing pressure, a spring-loaded valve opens, allowing water to flow from the high-pressure boiler into the coil heat exchanger.
As the high-pressure water from the first boiler passes through the coil, it is cooled from 179ºC to 100ºC, whilst maintaining pressure.The water then passes through the fin heat exchanger where it is cooled further, to 93ºC.
Now the water is at the right pressure and temperature to pass through the ground coffee, producing a perfect crema-cloaked espresso in the cup at the top.
Simple, but at the same time, deliciously clever."
