Systemair F-B90-650x375-11-G24T-SR - 182261

Beschreibung

Rectangular Fire Dampers F-B90 Rectangular Fire Dampers F-B90 The F-B90 is a maintenance-free, rectangular fire damper designed for use in ventilation systems. It is constructed from galvanized steel and features a divided blade made of abrasion-resistant, asbestos-free calcium silicate. For enhanced safety, it includes a gum seal and a intumescent seal that expands in case of fire. The fire resistance duration is up to 120 minutes. Benefits at a glance: Fire Safety: Tested according to EN 1366-2 and classified according to EN 13501-3, with a fire resistance of up to 120 minutes. Versatile Installation: Suitable for dry and wet installation in solid walls and ceilings, as well as in fire walls with a horizontal blade axis. Compact Design: Very short installation length of only 125 mm or 145 mm with a grille. High Sealing Class: Standard leakage class 3/C (for blade/housing) according to DIN EN 1751. Optional Smoke Control: Available as an overflow damper with smoke detector and control unit (BSDG230T or GSD230T) with a general building approval. Construction and Materials The housing of the F-B90 is made of galvanized steel sheet. The blade is divided and constructed from abrasion-resistant, asbestos-free calcium silicate. The damper is equipped with a gum seal and a dämmschichtbildende (intumescent) sealing layer that expands in the event of a fire to prevent the spread of flames and smoke. Operational Mechanisms The release mechanism can be chosen from the following options: Mechanical control unit with a 72°C fusible link, with or without limit switches. Electric spring-return motor (24V or 230V) with integrated run-time monitoring and thermoelectric release. Options with bus module are also available