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10 Tell-Tale Signs You Need To Get A New Machine Espresso
How Does Machine Espresso Work?

Machine espresso makes use of precise pressure and mind-blowing filter technology to create the delicious coffee we enjoy. What exactly does it work?

Espresso is produced by pushing hot water under high pressure through finely ground coffee. The process is similar to that of making drip coffee. However, the pressure is the main difference.

The Head of the Group

The group head is the portafilter that you place in the espresso maker when making it. It is responsible for dispersing the water into the portafilter, and controlling the pressure of the resulting extraction. There are several different types of group head each with its particular advantages and drawbacks. Some focus on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some contain a variety of features, like the E61 one, which is the most popular choice among baristas for its ability to offer multiple benefits in one package.

As you can see in the above photo the group head comes with many notches in which you can place your portafilter and twist it manually to secure it. A gasket made of rubber is positioned within the notches to create a seal as you insert your portafilter. The notches on the head permit an exact placement of the portafilter, which is vital to ensure an even extraction.

The group head does not just allow you to insert your portafilter easily, but it also maintains an even temperature. It does this by cycling hot water through the brew basket, and around the portafilter to ensure that it is always at the right temperature to extract. It is important to note that even a slight differences can make the distinction between a decent and a great espresso.

The Pump

The motorized pumps in espresso machines that rotate provide the nine atmospheric bars of pressure required for espresso extraction. This is different from manually operated piston machines that employ a lever. The pressure builds up by drawing tap water from a reservoir, and pumping it through a heat exchanger before it is shot through the ground coffee inside the group head.

best espresso machine tend to be cheaper than piston-driven machines, and tend to last longer, although both types of machines could get damaged through overuse and lack of cleaning. They also increase the complexity of mechanical systems that can lead to a high price tag on even the most basic models.

Certain espresso machines utilize steam pressure instead of a pump for brewing espresso. This can cause over-extraction because the boiler that makes steam also causes the water to boil. In addition the machines often have to restore their pressure between cups, which requires time and energy.

A majority of espresso machines utilize a rotary or vibration pump. A vibration model utilizes a rotating disk to generate pressure, whereas a circular model pushes hot liquid through the ground at high speed. Both types of machine can make a great espresso, but rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is the part that heats water to an optimal temperature for extraction. The resulting steam is then transferred to the portafilter containing the ground espresso and gets funnelled down into the cup. The steam creates pressure and pushes through the coffee grounds. This creates a crema on the top of the espresso. This is one of the main characteristics of a good espresso.

There are three types of espresso makers, and they differ in the type of pump they use and the degree of heat that the espresso is. There are different ways that the brew can be controlled and the dimensions of the cup the machine can produce.


best home espresso machine were steam-based. They had one boiler to create both brew and steam, however the pressure they were able to produce was not very high - two bars of atmospheric pressure at most. This resulted in the coffee tasting burnt and bitter. The modern espresso machine was designed by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.

The most well-known espresso maker is a semi-automatic machine with an electric pump. When people think of espresso machines, they envision these machines. With a semi-automatic machine, you must grind the beans and then tamp them by hand, but the pump is able to regulate the flow of water and pressure. This is a great compromise between the human touch and the mechanized accuracy.

The Filter

Typically, espresso machines use filters that separate the grounds of coffee as they move through the hot water. The filter is also a vital component of the temperature control system, as it prevents the machine from overheating.

It also aids in flavor, as it lets you enjoy a longer bloom time. This helps the beans to let their nuances out and provides the chance for better extraction.

It is important to remember that even the best filter can result in a bad cup of coffee. The quality of the beans and the extraction process, remain crucial.

It's in this area that the magic occurs. This is the reason why espresso tastes so good. The grouphead (also known as the brewhead) is where you put the portafilter, the device that you put the coffee grounds into, while making espresso.

In an espresso machine that is driven by steam, hot water is heated in an airtight tank to create steam, which is then pushed through the grounds at high pressure. These types of machines are generally less expensive and simpler to maintain than pump-driven models. They are however limited for creating the ideal brewing conditions as they only operate with 1-1.5 bar of pressure. The perfect shot requires 9-10 bars.

In visit the following page , espresso machines powered by compressed air-pump are becoming increasingly popular. They utilize an air compressor to force hot water through grounds and are significantly more portable than steam-driven electric machines.

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