16 Must-Follow Pages On Facebook For Machine Espresso Marketers How Does Machine Espresso Work?

The machine espresso utilizes precision pressure, and a filtering system that is awe-inspiring to create the coffee you enjoy. What exactly is it?

Espresso is made by forcing hot water at high pressure through finely ground coffee. The process is similar to making drip coffee, but the key difference is in the pressure.

The Head of the Group


The group head is the portafilter that you put in when making espresso. It is responsible for dispersing water into the portafilter and controlling the pressure of the extraction. There are a variety of group heads, each with its own advantages and disadvantages. Some are focused on temperature stability, some on pre-infusion options, and others are designed to control the lever. There are some that come with a range of features, such as the E61, which is considered the most popular choice among baristas due to its capacity to offer multiple benefits 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 inside these notches, and then turn the head around to secure it. There is also a gasket made of rubber which is located inside the notches and helps to create an airtight seal when you insert your portafilter into the machine. The notches permit precise placement of the portafilter. This is essential for an even extraction.

The group head is not just able to allow you to place your portafilter easily however, it also keeps a constant temperature. This is accomplished by cycling hot water around the portafilter, and through the brew-basket, ensuring that the temperature is always at the right level for extraction. This is important, as just a few degrees could mean the difference between excellent and great espresso.

The Pump

The motorized pumps that are used in espresso machines rotary provide nine atmospheric bar pressure required to extract espresso. This is different from manual piston machines that rely on a lever. The pressure builds by drawing tap water from a reservoir and pumping it through a heat exchanger prior being shot through the ground coffee in the group head.

Pumps are typically less expensive than piston-driven machines, and tend to last longer, although both types of machines can become damaged due to excessive use and poor cleaning. Pumps are also more complex mechanically, which can raise the price of even the simplest models.

Certain espresso machines do away with the pump completely and utilize steam pressure to make espresso. The disadvantage of this is that the same boiler that produces steam also increases the temperature of the water until it reaches boiling, which can lead to excessive extraction. The machines also need to constantly rebuild their pressure between cups. This takes energy and time.

Many espresso machines use either a vibration or rotary pump. A vibration model employs a rotating disk to generate pressure, whereas a Rotary model pushes hot coffee through the ground at a high speed. Both types of machines can produce an excellent espresso, but Rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is the part which heats the water to the ideal temperature for extraction. The steam that is produced gets to the portafilter which is a container for espresso grounds. It is then poured into the cup. During this process, steam creates pressure that pushes through the grounds of the coffee. This results in a whipped-up the top of the espresso. This is a sign of a great espresso.

There are three kinds of espresso makers. They differ in the type of pump they employ and how hot the brew is. There are espresso coffee machine uk that the brew may be controlled, as well as the dimensions of the cup the maker can create.

The first espresso machines were steam-types. The earliest espresso machines were steam-type machines. This led to the coffee tasting bitter and burnt. The modern espresso machine was developed by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most common espresso maker is a semi-automatic machine with an electric pump. These are what people imagine when they imagine an espresso machine. Semi-automatic machines require you to grind and tamp the beans by yourself while the pump controls the flow of water and pressure. This is an excellent compromise between human touch and the mechanised consistency.

The Filter

Typically, espresso machines have filters to separate the grounds of coffee as they move through the hot water. The filter is also an essential element of the machine's temperature control, as it helps prevent overheating.

It also enhances flavor, as a filter can allow for a longer bloom time. This lets the beans release their flavor and improves extraction.

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

It's in this area that the magic happens. This is the reason why espresso tastes so good. The grouphead (also called the brewhead) is where you place the portafilter, the device that you use to put the grounds of coffee into while making espresso.

In the steam-driven espresso machine hot water is heated in an airtight container to create steam. Steam then pushes the hot water through the grounds at high pressure. These types of machines are generally less expensive and easier to maintain than pumps-driven models. They are however limited in their ability for creating the ideal conditions for brewing since they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

In recent years, espresso machines powered by compressed air-pump have become increasingly popular. They make use of an air compressor to force hot water into the ground. They are also more mobile than steam-driven electric espresso machines.