This type of espresso machine utilizes a rotating pump to generate the necessary nine bars of pressure for extracting espresso. This pump draws water from a reservoir and forces it through a portafilter containing finely ground coffee, producing the rich, concentrated beverage. Distinguished by its consistent pressure delivery, this machine type often features a quieter operation compared to vibratory pump alternatives.
Consistent pressure is vital for achieving optimal espresso extraction, ensuring balanced flavor profiles and avoiding undesirable bitterness or sourness. The rotational mechanism provides a smooth, continuous flow of water, leading to a more stable brewing process. Historically, these machines were primarily found in commercial settings due to their robust construction and reliability. However, advancements in technology and manufacturing have made them increasingly accessible for home use, allowing enthusiasts to enjoy caf-quality espresso in their own kitchens.
