Automatic air vent (definition)

Automatic air vent is a device used in heating, ventilation and water supply systems to remove air from pipelines and radiators. Its main function is to automatically remove accumulated air from the system, which helps prevent the formation of air locks and improves the efficiency of the system.

Automatic air vent: main components and operating principle

1. Housing with internal mechanism — inside the housing there is a mechanism that reacts to the presence of air in the system.
2. Air release hole - located in the upper part of the housing and serves to remove accumulated air from the system.
3. Diaphragm or ball valve - opens when air is present, allowing it to escape from the system, and then closes to prevent water from escaping.

Functions of the automatic air vent:

• Eliminating air jams — helps to avoid the formation of air locks in the system, which can lead to imbalances in heat distribution or pressure.
• Improving system efficiency — ensures more efficient coolant circulation and uniform heat distribution throughout the system.
• Automatic operation - does not require manual adjustment or maintenance, since the sensor automatically reacts to the presence of air and removes it from the system.

Application of automatic air vents:

Automatic air vents are used in various heating, water supply and ventilation systems, especially at high points in pipelines or radiators where air tends to accumulate. They play an important role in ensuring reliable and efficient operation of the system, reducing the likelihood of emergency situations and improving the comfort conditions in buildings.

This device automatically releases air that has accumulated in the pipes and prevents the coolant from moving. Despite the fact that not every system requires air removal, an automatic air vent can be installed to compensate for unspecified risks of air accumulation. That is, it is a mandatory fitting for heating systems that simplifies the operation process without maintenance.

Pellet boilers operate in a forced circulation system where air is unlikely to enter the heating system, however, installing an air vent is a preventative measure.