Non-return valve D60 / D80
Protection against backflowing flue gas in shared chimney systems and cascade layouts

When a heating system is designed in a multiple or cascade configuration, there are specific challenges regarding the connected flue gas system. There is a risk that flue gas from operating heaters will flow through the common flue system into inactive or failed boilers. To mitigate this risk, a mechanical safety device in the flue gas pipe is required in addition to the electronic backflow safety device in the boiler. The mechanical safety device must close off the flue gas path to a switched-off boiler. The Skoberne non-return valve completely fulfills this requirement. Additionally, the patented condensate drain with integrated siphon allows for the largest possible cross-sectional area to be retained while only minimally increasing the operating pressure of the boiler.