The Caleffi safety valve is ideal for the needs of a boiler, providing excellent protection against overpressure. It is installed in central heating systems and ensures their proper operation by automatically opening when the pressure exceeds the preset limit, thereby preventing potential dangers to the installation and nearby people. Its placement at the highest point of the system is important, without the use of switches or valves.

This two-way valve features two ports, one for the inlet of the medium and one for the outlet. Thus, when the inlet is closed, flow stops, while when it is open, the outlet flow always matches the inlet flow, ensuring system stability.