18 Essential Parts of Espresso Machine: Names & Diagram

Many people enjoy drinking coffee but making it can be quite time-consuming. To address this issue, espresso machines were invented. It brews the coffee by forcing the pressurized water near its boiling point through a puck of ground to make thick, creamy, and concentrated coffee, which we call expresso. Espresso machines come in three main types: manual, automatic, and semi-automatic. Despite their differences, all three types serve the same purpose. Before delving further into the topic, we must familiarize ourselves with the various espresso machine parts.

Espresso Machine Parts Diagram

Espresso Machine Parts, Names & Diagram

Parts of an Espresso Machine

  • Head
  • Portafilter
  • Portafilter Spring
  • Basket of Portafilter
  • Group gasket
  • Group Screen
  • Drip Tray
  • Group Dispense Switch
  • Group Dosing Keypad
  • Hot Water Trap
  • Power Switch
  • Pressure Gauge
  • Sight Glass
  • Steam Wand
  • Steam Tip ( Steam Wand tip)
  • Adjustment Ring or Knob
  • Bean Hopper
  • Doser

Espresso Machine Parts and Function


The group head is the primary part of the espresso machine and is responsible for the espresso. It is called a brew group or brew head.

At the front side of the espresso machine, it puts the water from the espresso machine into the filter basket. We can insert our portafilter in the group head while preparing espresso.


The portafilter is one of the essential parts of an espresso machine. The portafilter is a Portable Filter or filter holder. It looks like a metal basket, and grounded coffee puts into a portafilter bucket.

This portafilter is placed in the group head and locked within-group the head. After applying the pressure, liquid espresso comes out from two spouts.

Portafilter Spring

The portafilter springs hold the baskets in place. You can place the portafilter spring into the groove on the inner side of the portafilter body.

Most portafilter springs are hexagonal, and one end is open. Also, some of the portafilter springs are circular.

Basket of Portafilter

The portafilter basket is nothing but a filter screen, and it locates within the portafilter. This portafilter basket may be a single or double size and placed in the portafilter using a spring.

Group gasket

The group gasket is nothing but a ring of rubber. The function of the group basket is to seal the portafilter and portafilter basket to the group.

It is placed and inserted into a groove drawn into the group. Whenever the portafilter leaks, it’s compulsory to change the group basket to avoid the leakage,

Group Screen

The group screen is in the group head from which hot water flows. It is also called a dispersion screen or shower screen.

Drip Tray

It is a tray on which we can place a coffee cup. It is removable. There is a provision for adjusting the height of the cup in it.

Group Dispense Switch

The group dispense switch works similarly to the dosing keypads but is a simple On/OFF switch. It is on top of the groups. Some automatic espresso machines have a dispense button, which provides additional functions for operation.

Group Dosing Keypad

Group Dosing keypads are used in both automatic and super-automatic espresso machines. There are buttons on the group dosing keypad. When we press that button, the group head machine activates.

Hot Water Trap

A hot water tarp is also called Americano Wand.

Power Switch

The power switch is on the backsplash of the espresso machine. This power switch shows the reading from 1-0-2. The general position for the entire operation is the two positions and may vary depending on our requirements.

Pressure Gauge

The pressure gauge is on the front side of the machine. It has two needles or hands, which display boiler pressure and pump operating pressure.

This pressure gauge helps to monitor the health of the espresso machine & pressure. 

Sight Glass

All espresso machines have sight glass found on the front side of the espresso machine. Its primary function is to show the water range in the boiler.

Sight glass is nothing but a water level gauge. There are two marks on the glass, Minimum and Maximum.

Steam Wand

A steam wand is a tool that produces foams in steaming milk while making espresso. This steam wand is like a solid metal pipe and can activate using a valve or lever, depending on the type of espresso machine.

The steam wand connects to the boiler to flow the steam. It was created by the boiler and used to froth the milk.

Steam Tip ( Steam Wand tip)

The steam tip is also named a steam wand tip. This steam wand tip is connected to the end of the steam wand.

The primary function of the steam wand tip is to disperse the steam coming from the steam wand in the splayed pattern.

Adjustment Ring or Knob

The adjustment ring or knob is found ON the side of the bean hopper. It helps to grind the coffee beans in a coarse or fine mixture, depending upon the requirement. When we rotate the knob, it starts grinding coffee beans into fine powder.

Bean Hopper

A Bean hooper is a large, clear container on the grinder. Generally, it is of plastic or glass type. The Hopper holds your espresso bean and feeds the beans into your grinder. It burrs the coffee bean when we rotate the knob.


The doser is a chamber in front of the grinder. The doser is to hold the ground coffee in the container, which goes into the portafilter.

Single/Double Doser Button

These are the buttons that give us the option of a dose of coffee. According to the requirement, we can select the dosing option.

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