Fire Protection Dampers Series BSK 90B

For universal installation in masonry walls according to DIN 1053, in concrete walls, in light partition walls, directly in front of and outside of walls and ceilings regardless of the installation position. In conjunction with dual-sided connection of ventilation ducts made from non-combustible materials or with protective grilles, the fire damper has a resistance class of K90; otherwise, it is K30. Damper blade made of galvanized steel sheet with internal special insulation, housing and mounting parts made of galvanized steel sheet, bearings made of brass, release opening, and two opposite inspection openings can be used for inspection. Release by fusible alloy at 72°. Housing length: 500 mm, also available in 375 mm.