The Fire Damper FD is engineered for safe isolation of duct penetrations between fire compartments. Built with galvanized or stainless steel casing, the damper features a fire-resistant blade, precision seals, and optional thermal fuses (72°C or 95°C). It meets EN 1751 class C for air leakage and class 3 for closed blade performance. Variants for potentially explosive atmospheres also available (see FD-Ex catalog).