10 Machine Espresso-Related Meetups You Should Attend

How Does Machine Espresso Work?

The machine espresso uses precise pressure and filtering technology that is amazing to create the coffee you love. What exactly does it work?

To make an espresso hot water is forced under high pressure through finely ground coffee. The process is similar to making drip coffee. However the pressure is the major difference.

The Head of the Group

The name implies, the group head is the place you place your portafilter while brewing espresso maker barista. It disperses water into the portafilter, and then regulates the pressure during the extraction. There are many different types of group heads each with their own advantages and drawbacks. Some are designed to provide stability in temperature, while others are built to handle pre-infusion. Some are designed to control the lever. Some come with a combination of both, such as the E61. This is a preferred choice for baristas as it provides a variety of benefits in a single package.

As you can see in the picture above, the group head is fitted with a variety of notches. You place your portafilter into these notches and turn the head around to secure it. A gasket made of rubber is placed within the notches to create a seal as you insert your portafilter. The notches allow for an exact placement of the portafilter. This is crucial to ensure a consistent extraction.

The group head not only lets the portafilter to be inserted easily however, it also keeps the temperature at a constant level. It does this by circulating hot water through the brew pan and around the portafilter, ensuring that it's always at the right temperature to extract. This is crucial, since even a small difference in temperature can make the difference between a good and excellent espresso.

The Pump

The motorized pumps that are used in espresso machines rotary provide nine atmospheric bars of pressure required for espresso extraction. This differs from manually operated piston machines that employ levers. The pressure builds by removing tap water from a reservoir and pumping it through a heat exchanger prior to being pumped through the ground coffee in the group head.

Pumps tend to be cheaper and last longer than piston-driven machines. However, both types of machines are susceptible to degrading because of excessive use and insufficient cleaning. Pumps are also more complicated mechanically, which can increase the cost of even simpler models.

Some espresso machines use steam pressure instead of a pump to brew espresso. This can result in over-extraction because the boiler that produces steam also causes the water to boil. In addition these machines are often required to restore their pressure between cups, which requires time and energy.

A large majority of espresso machines employ a rotary or vibration pump. A vibration model uses an oscillating disk to create pressure, while a rotating model pushes hot water through the ground at a rapid speed. Both types of machine can make a great espresso, however rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is what will heat the water to the perfect temperature to extract. The steam produced gets to the portafilter which holds the espresso grounds. The steam is then channeled into the cup. The steam creates pressure to push through the coffee grounds. This produces a layer of crema that is then poured over. This is one of the hallmarks of a good espresso.

There are three types of espresso makers, user.yukbiz.Com,, and they differ in the type of pump they use and how hot the brew is. There are many ways to control the brew as well as the size of cup that can be produced by the machine.

The first professional espresso maker machines were steam-type. The first espresso machines were steam types. The coffee tasted bitter and burned. This is the reason Milanese makers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most popular espresso maker is a semiautomatic machine with an electric pump. These are the images people have when they think of an espresso machine. Semi-automatic machines require you to grind and tamp the beans on your own however the pump controls the flow of water and pressure. This is a fantastic solution that combines human control with mechanized reliability.

The Filter

Espresso machines usually have filters that separate the coffee grounds from the hot water. The filter is also a vital component of the machine's temp control, as it prevents overheating.

A filter also helps with flavor, as it permits an extended flowering time. This helps the beans let their nuances out and provides an opportunity for a better extraction.

However it is crucial to remember that even a great filter can produce a bad cup of coffee, as the quality of the beans and extraction is still vital.

This is where the magic happens. It's what makes an espresso really taste good. The grouphead (also known as the brewhead) is where you place the portafilter, which is the thingy that you put the grounds of coffee into when making espresso.

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

In recent years, espresso machines powered by compressed air-pump have become increasingly popular. They utilize an air compressor to push hot water through the grounds, and are far more portable than steam-driven electric machines.