sunviolin6

User Name: You need to be a registered (and logged in) user to view username.

Total Articles : 0

https://www.coffeee.uk/products/casabrews-professional-espresso-machine-with-milk-frother

How Does Machine Espresso Work Machine espresso uses precision pressure and mindblowing filter technology to make the coffee we love How does it work exactly Espresso is made by forcing hot water under high pressure through finely ground coffee The process is similar to making drip coffee However the pressure is the major difference espresso coffee machines of the Group As the name implies the group head is where you place your portafilter while making espresso It disperses water into the portafilter and then regulates the pressure during the extraction There are a variety of types of group head each with their particular advantages and disadvantages Some are specifically designed for temperature stability while others are built to handle preinfusion Others are made to control the lever Some are a combination such as the E61 This is a very popular choice for baristas because it offers multiple advantages in a single package As you can see from the photo above the head of the group is equipped with several notches It is possible to place your portafilter in these notches then twist the head to lock it There is also a gasket of rubber that is a part of the notches and helps to create a seal when you insert your portafilter into the machine The notches permit an exact placement of the portafilter This is vital for an accurate extraction The group head not only lets you to insert your portafilter easily but it also maintains the temperature at a constant level It does this by cycling hot water through the brew basket and around the portafilter ensuring that it is always at the correct temperature for extraction This is vital because even a small difference in temperature can make the difference between good and excellent espresso The Pump Contrary to manual piston machines that use a lever to pressurize water rotating espresso machines rely upon motorized pumps to supply the nine atmospheric bars of pressure necessary to extract espresso The pressure builds by drawing tap water from a reservoir and pumping it through a heat exchanger prior it is shot through the ground coffee inside the group head Pumps are typically less expensive than pistondriven machines and they tend to last longer but both types of machine can get damaged through overuse and lack of cleaning They also create mechanical complexity and can lead to an expensive price for even the simplest models Certain espresso machines utilize steam pressure instead of a pump for brewing espresso This could lead to overextraction since the boiler that produces steam also heats the water until it comes to a boil In addition these machines are often required to rebuild their pressure between cups which takes time and energy A majority of espresso machines use the rotary or vibration pump with a vibrating model using a rotating disc to create the pressure and rotating models that push hot water through the grounds at high speed Both machines can produce excellent espresso but rotary machines are more quiet durable and less likely to fail The Boiler The boiler will heat the water to the right temperature for extraction The steam created will eventually reach the portafilter which is the container that holds the espresso coffee grounds It is then funneled into the cup The steam is able to create enough pressure to push the grounds of the coffee through This results in a whippedup top of the espresso This is a sign of a good espresso There are three kinds of espresso makers which differ in the type of pump they employ and the degree of heat that the brew is There are a variety of ways that the brew can be controlled and the size of the cup the machine is capable of making The first espresso machines were steam types They used one boiler to create both steam and brew however the pressure they were able to generate was low only two bars of atmospheric pressure at the most The coffee tasted bitter and burnt This is the reason why Milanese makers Luigi Bezzerra and Desiderio Pavoni invented the modern espresso machine The most common espresso maker is a semiautomatic machine with an electric pump When people think of espresso machines they think of these machines Semiautomatic machines require you to grind and tamp the beans on your own The pump however regulates the flow of water 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 coffee when they pass through the hot water The filter is also an essential element of the machines temperature control since it stops overheating It also helps with flavor as a filter lets you enjoy a longer bloom time This helps the beans to release their flavor and gives an opportunity for a better extraction It is important to keep in mind that even the best filter can make a bad cup of coffee The quality of the beans as well as the extraction are still crucial Its in this area that the magic happens This is the reason why espresso tastes so delicious The grouphead also called the brewhead is where the portafilter the thingy you put the coffee grounds into is placed when youre making espresso Steamdriven espresso machines use hot water that is heated inside an airtight container to produce steam The steam then pushes hot water through grounds of coffee under high pressure They are less expensive and easier to maintain than pumpsdriven models However they are not as efficient in their ability to provide the ideal brewing conditions since they are only operating at 115 bars of pressure The perfect 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 into the grounds and are significantly more portable than steamdriven electric machines