Backflow Safety Valve

Condensing heating systems placed side by side in the CASCADE chimney mechanism throw the flue gases out with an internal chimney fan, since the temperatures of the flue gases are too low to allow natural draft; In this case, they produce an output pressure of +90, +140 or +200 Pa, depending on the model of the heating devices.

 

In the CASCADE chimney arrangement arranged side by side, a Backflow Safety Flap is mounted on the chimney outlet of each condensing device so that the condensing devices do not affect each other's draft and do not create resistance. Backflow safety valve allows one-way flow of flue gas and closes the output of the device in case of backflow.

 

GAG Valves are manufactured with motor actuated stainless steel with a leak-proof gasket, as well as small and large valves made of poly propylene, which are opened respectively according to the amount of flue gas flow, allowing the flue gas to pass in one direction. Another model, also made of poly propylene, covers the flue gas outlet with a light ball. When the condensing device operates, it lifts the ball into the air with the pressure power of the fan and allows the flue gas flow in one direction. Bimetal thermal valves produced for negative pressure devices should never be used in condensing type CASCADE chimney systems. Bimetal thermal valves are thermal apparatus consisting of two leaky valves, developed to save energy for vented combi boilers and water heaters.