The safety valve from Renner is ideal for use in boilers. It is designed to protect the central heating system from excessive pressure. When the pressure exceeds the preset limit, the valve opens to vent the system, thus preventing serious hazards to people and materials. Proper installation of the valve is critical, as it is placed at the highest point of the installation, without the need for switches or valves.

As a two-way valve, it features two ports: one for medium intake and one for outlet. When the inlet port is closed, flow stops, whereas when it is open, the flow into the inlet equals the flow out, ensuring efficient operation of the system.