What is the 'bar' pressure of a commercial espresso machine and what range of bar pressures does a commercial espresso machine operate at? What is optimum 'bar' pressure for perfect espresso coffee? -
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Swan Retro Pump Espresso Coffee Maker, Grey, 15 Bar Pressure, Milk Frother, 1.2 Litre Tank, SK22110GRN : Amazon.de: Home & Kitchen
![SESSLIFE Automatic Espresso Machine, 15-Bar Pressure Pump Coffee Machine, Black Espresso Maker with Milk Frother, Burr Grinder and Automatic Cleaning, TE1112 - Walmart.com SESSLIFE Automatic Espresso Machine, 15-Bar Pressure Pump Coffee Machine, Black Espresso Maker with Milk Frother, Burr Grinder and Automatic Cleaning, TE1112 - Walmart.com](https://i5.walmartimages.com/asr/619a03ff-03df-4a16-8a8a-e02c7e88bb2f.0615a78bae66fdeccffe14aab894b279.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)