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In 1961, Faema released the E61, an espresso machine introducing many 'firsts' which are still commonly found in most espresso machines. The most significant was the delivery of pressurized water through a mechanical pump at approximately 9 BAR, replacing the piston-lever designs of the 1950s. Faema circumvented the problem of running heated water through the pump, by running cold water through the pump, through a heat exchange tube through the steam boiler to flash heat the water, before entering the diffusion block and through the ground coffee to create an espresso. Faema also introduced a new grouphead that was kept warm by circulating water from the boiler through the grouphead in a thermosyphon circuit. The grouphead was activated by a lever, which when partially open, allows the release of pressure created from the municipal water line. That pressure soaked the coffee with brew-temperature water, allowing for a smoother extraction. When the lever is fully raised, the pump is activated and the coffee is extracted at full pressure.
The implications of the technological innovation of the E61 was revolutionary, and allowed Faema to acquire a significant espresso machine market share within years.
Another impact of the E61 is in the home espresso machine market. A generic replica version of the E61 grouphead, coupled with the heat exchange boiler has become popularized in Europe, North America, and Australia. While the aesthetic appeal of the E61 group is cited as a reason for its popularity, the grouphead paired with a heat exchange boiler also created a new level of home espresso quality for consumers.