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https://www.coffeee.uk/products/tassimo-my-way-2-coffee-machine-over-70-drinks
How Does Machine Espresso Work The machine espresso uses precise pressure and filter technology that is aweinspiring to create the coffee you love What exactly does it work Espresso is produced by pushing hot water under pressure through finelyground coffee The process is similar to making drip coffee however the main difference lies in the pressure The Head of the Group The group head is the portafilter you insert when brewing espresso It disperses water in the portafilter and then regulates the pressure during the extraction There are a variety of group heads each with its own advantages and disadvantages Some focus on temperature stability whereas others on preinfusion options and others are designed to control the lever Some come with a combination of both like the E61 This is a preferred choice for baristas because it offers multiple benefits in one package As you can see in the image above The group head features numerous notches that you can place your portafilter and twist it with your hands to secure it There is also a gasket made from rubber which is located inside the notches to help create a seal when you insert your portafilter into the machine click this link here now allow for precise placement of your portafilter This is crucial to ensure an efficient extraction The group head does not just allow you to place your portafilter easily but it also maintains an even temperature This is done by cycling hot water around the portafilter and through the brewbasket making sure that the temperature is constant to extract the coffee It is important to realize that even a slight difference can make the difference between a good and excellent espresso The Pump Unlike manual piston machines that use a lever to pressurize water the rotary espresso machines use motorized pumps that provide the nine atmospheric bars of pressure that are required for espresso extraction This pressure is built up by pumping water through a heatexchanger and then through the ground coffee Pumps tend to be less expensive than pistondriven machines and tend to last longer although both types of machines may get damaged through overuse and lack of cleaning Pumps are also more complex mechanically which can raise the cost of even the simpler models Certain espresso machines can eliminate the pump entirely and utilize steam pressure to make espresso The disadvantage of this is that the boiler that produces steam also increases the temperature of the water to boiling which can lead to overextraction In addition these machines are often required to rebuild their pressure between cups which requires time and energy Many espresso machines use an rotary or a vibration pump A vibration model uses a vibrating disk to generate pressure whereas a circular model pushes hot liquid through the ground at a fast speed Both machines can produce excellent espresso however rotary machines tend to be more stable quieter and less likely to break down The Boiler The boiler is the part which heats the water to the ideal temperature for extraction The steam that is created is then directed to the portafilter which contains the espresso coffee grounds It is then pumped into the cup During this process the steam generates enough pressure to push the coffee grounds through This creates a crema on top of the espresso This is one of the hallmarks of a great espresso There are three types of espresso makers and they differ in the kind of pump they use and the degree of heat that the brew is There are also different ways in which the brew could be controlled as well as the size of the cup that the maker can create The first espresso machines were steambased They utilized a single boiler to make steam and brew however the pressure they were able to produce was not very high two bars of atmospheric pressure maximum The coffee tasted bitter and burned The modern espresso machine was developed by the Milanese producers Luigi Bezzerra Desiderio Pavoni The most popular espresso maker is a semiautomatic machine with an electric pump When people think of espresso machines they envision these machines Semiautomatic machines require you to grind and tamp the beans on your own but the pump regulates the water flow and pressure This is an excellent compromise between human touch and the mechanized consistency The Filter Typically espresso machines utilize a filter to separate out the grounds of the coffee as they go through the hot water The filter is also an essential component of the machines temperature control as it prevents overheating Filters also aid in flavor because it allows for an extended flowering time This allows the beans to release their flavors and provides an opportunity for a better extraction It is important to keep in mind that even the most efficient filter can produce a bad cup of coffee The quality of the beans as well as the extraction are still very important This is where the magic happens Its what makes an espresso really taste good The grouphead sometimes called the brew head is the place where the portafilter the container you place the ground coffee into is placed when making espresso Steamdriven espresso machines use hot water that is heated in an airtight container to create steam The steam then pushes hot water into the grounds of coffee under high pressure These machines are less expensive and easier for the user to maintain than pumpsdriven models They are however limited in their ability for creating the ideal conditions for brewing since they only operate with 115 bar of pressure The ideal shot requires 910 bars In recent times espresso machines powered by compressed airpump have become increasingly popular They use an air compressor to push hot water through the grounds and are significantly more portable than electric steamdriven machines
