O-rings used in coffee machines play a fundamental role in ensuring the correct operation of the device. These are precise seals that prevent water and steam leaks in crucial points of the pressure system. Depending on the espresso machine model, O-rings come in different sizes and materials, adapted to the intense working conditions inside the device.

They are characterized by excellent resistance to high temperatures, cleaning agents, as well as the action of coffee fats and oils. In high-pressure espresso machines, where the temperature reaches +100°C and the pressure is up to 15 bars, O-rings must exhibit high elasticity and resistance to permanent deformation (known as permanent deformation under compression).

Properly selected O-rings affect the tightness of connections between hydraulic elements, such as:

• valves and solenoid valves - controlling the flow of water and steam
• pressure pumps - generating the appropriate extraction pressure
• pipe fittings and boilers - responsible for the stable operation of the heating system
• brewing groups and milk frothing nozzles - crucial for the quality of the prepared beverage

Ensuring hydraulic system tightness
O-rings effectively eliminate water and steam leaks, which affects the efficiency of the device and prevents failures resulting from excessive moisture in critical electrical components.

Improving coffee quality
Damaged o-rings can cause improper water and steam flow, negatively impacting coffee extraction. Replacing the seals ensures optimal espresso machine performance, translating into the full taste and aroma of the drink.

Protecting espresso machine components
Leaks can lead to corrosion of metal parts, damage to the pressure pump, or leaks onto the espresso machine's electronics. Regular o-ring replacement minimizes the risk of serious malfunctions.

Extending device lifespan
Properly maintained coffee machines can operate flawlessly for many years. Regular inspections and replacement of worn seals significantly extend their lifespan.

Cost savings in service
Replacing o-rings is a much cheaper and simpler procedure than repairing damaged hydraulic components. Prophylactic seal replacement helps avoid expensive service interventions.

At Power Rubber, we offer a wide selection of O-rings compatible with the most popular models of coffee machines, both for home and professional use. Each product is carefully inspected for dimensions and technical parameters to ensure a perfect fit. Our Oring sealing rings are made of high-quality materials, known for their increased resistance to high temperatures and pressure, guaranteeing long-lasting reliability. Our specialists are happy to assist in selecting the right product for a specific device.