The Caleffi safety valve is ideal for use on boilers, providing reliable protection for the heating system against excessive pressure. Its operation is critical, as it automatically opens when the pressure exceeds a predetermined value, allowing the system to depressurize and minimizing risks to people and equipment. It is installed at the highest point of the installation, without the need for a switch or drain valve.

This two-port valve has two connections, one for the inlet of the medium and one for the outlet. When the inlet is closed, flow is interrupted, while when it is open, the flow at the outlet is equal to that at the inlet, ensuring the smooth operation of the system.