fromDaily Coffee News by Roast Magazine
1 day agoDuvall Espresso Launches Sales of Groundbreaking FC-1 Espresso Machine
"If you tried to accomplish this with a conventional rotary pump, a needle valve, and a pressure sensor, the problem is you have a feedback loop," Duvall said. "The flow has to happen, and then the flow meter has to sense it, and then you have to use your needle valve to adjust the resistance to try and get a flow rate in the future. It's a backwards-looking system."
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