Spring-loaded backdraft damper for round ducts. The damper prevents back draft when the system is off. The blades are opened with air flow and are closed with a spring.
The damper is connected to round air ducts and fixed with clamps. The blade axis should be in vertical position. Correct air flow direction should be considered.
The damper is made of galvanized steel housing with spring-loaded aluminium blades.
KOMu - model is sealed with foamed rubber for noise absorption and extra air tightness.
|Casing material||оцинкованная сталь||-|
|Form-ducts||for round air ducts||-|
|Series||Spigot diameter [mm]|
|KOM / KOMu
||100; 125; 150; 160; 200; 250; 315|