Where Is Machine Espresso Be 1 Year From What Is Happening Now? How Does Machine Espresso Work?

The machine espresso utilizes precise pressure and filtering system that is awe-inspiring to make the coffee you love. But how 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 main difference.

The Group Head

The name implies the group head is the place you put your portafilter in when brewing espresso. It is responsible for dispersing the water into the portafilter and then controlling the pressure that results from the extraction. There are a variety of group heads each with their own advantages and drawbacks. Some are specifically designed for temperature stability while others are specifically designed to handle pre-infusion. Some are designed to control the lever. Some contain a variety of features, like the E61, which is the standard choice for many baristas due to its ability to provide multiple benefits in one package.

As you can see in the above photo the group head is made up of many notches in which you can place your portafilter and twist it with your hands to lock it in. A rubber gasket is located in the notches to create a seal when you insert your portafilter. The notches allow for the precise placement of the portafilter. This is vital for a consistent extraction.

In addition to allowing you to easily connect your portafilter, the group head is responsible for maintaining an even temperature. This is achieved by cycling hot water around the portafilter and through the brew-basket, making sure that the temperature is constant to extract the coffee. It is important to realize that even a small differences can make the distinction between a great and a excellent espresso.

The Pump

Motorized pumps in espresso machines that rotate provide the nine atmospheric bars of pressure required for espresso extraction. This is different from manual piston machines that use a lever. professional espresso machine for home is generated by pumping water through a heat exchanger and then through the ground coffee.

Pumps are generally less expensive than piston-driven machines, and tend to last longer, however both types of machine can degrade with overuse and insufficient cleaning. Pumps are also more complex mechanically, which can raise the price of even the simple models.

Certain espresso machines utilize steam pressure instead of a pump to brew espresso. This can cause over-extraction because the boiler that makes steam also heats the water until it comes to a boil. The machines also need to continuously rebuild their pressure between cups. This takes energy and time.

Many espresso machines utilize either a rotary or vibration pump, with a vibration model that uses a vibrating disc to create pressure, and a rotary model pushing hot water through the grounds under high speed. Both machines can make great espresso but rotary machines are more quiet, durable and less likely to break down.

The Boiler

The boiler is the element that heats the water to the optimal temperature for extraction. The steam that is produced reaches the portafilter that contains the ground espresso coffee, and is then funneled down into the cup. During this process the steam generates enough pressure to push the coffee grounds through. This results in a layer crema on top. This is a hallmark of a great espresso.

There are three types of espresso makers, which differ in the type of pump they use and the degree of heat that the brew is. There are various ways to control the strength of the brew and the size of cup that can be produced by the machine.

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

The most well-known espresso maker is a semi-automatic device that has an electric pump. These are the things people think of when they imagine an espresso machine. With a semi-automatic machine, you have to grind the beans and tamp them by hand. However, the pump provides regulated water flow and pressure. This is a great compromise between the human touch and mechanized consistency.

The Filter


Espresso machines typically use a filter that separates the grounds of coffee from hot water. The filter is also a crucial element of the temperature control system since it helps prevent the machine from overheating.

A filter also improves flavor, as it permits the beans to flower for a longer period of time. This helps the beans release their nuances and gives an opportunity to improve extraction.

However, it is important to keep in mind that even a high-quality filter can produce a bad cup of coffee, since the quality of the beans and extraction is still vital.

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

In a steam-driven espresso machine, hot water is heated in an airtight tank to create steam. Steam then pushes the hot water through the grounds with high pressure. They are less expensive and easier to maintain than pumps-driven models. However, they are limited in their capacity to create the ideal brewing conditions, since they operate at 1-1.5 bars of pressure, while the perfect shot requires 9-10 bar.

In recent years, compressed air-driven espresso machines have been gaining popularity. They utilize an air compressor to push hot water into the grounds and are significantly more portable than electric steam-driven machines.