Sonifer SF-3535 household 15 bar high pressure pump milk frother espresso coffee maker - Silver

An espresso machine is a specialized brewing device that forces heated, pressurized water through a densely packed bed of finely ground coffee. This rapid, high-pressure process extracts a highly concentrated coffee shot (espresso) topped with a thick, golden foam called crema, which serves as the base for lattes and cappuccinos.

Understanding the mechanics, the main machine types, and the overall setup is helpful for getting the most out of your coffee experience.

Core Components

• Portafilter & Basket: The metal handle with a filter basket that holds the ground coffee. You lock it into the machine's group head before brewing.
• Pump: Usually an electric pump that generates intense pressure (typically 9 to 15 bars) required for true espresso extraction.
• Boiler / Thermoblock: The heating element that brings the water to the optimal brewing temperature (usually between 90°C to 96°C).
• Steam Wand: A metal nozzle that releases pressurized steam to froth and texture milk for drinks like cappuccinos and lattes.