Safety valve suitable for use in a boiler. The safety valve is installed in a central heating system to protect it from excessive operating pressure. When the pressure exceeds a preset limit, it opens to relieve the system.

Its role in the installation is very important, as increased pressure poses serious risks to people and materials. It is installed at the highest point of the installation and without the intervention of any switch or valve.

It is a two-way valve, meaning it has 2 ports, one for the medium's inlet and one for the outlet. When the inlet is closed, the flow is interrupted, while when it is open, the flow at the inlet is equal to the flow at the outlet.