Our Bengle espresso machine model features a new pump of our design, which is entirely silent, has very fast flow rates (currently at 20mL/s), accurate water volume displacement volume, and super smooth flow.
Here is an animation to show you how it works.
We call it a "dual lever pump" because it is essentially two lever machine piston pumps, joined together. This has all the advantages of lever machines, without the downside of a limited amount of water. This pump design can give you whatever water volume you want, since one piston refills as the other is pumping out water.
Our temperature profiling technology is attached after the pumps, and is not shown in this graphic.
The two pumps overlap during each handover: one ramps down while the other ramps up, so their sum (the top edge) never dips. Hover the chart to read values.