Damper assembly for ventilation system

摘要

A fire damper for ventilation system has a damper body (2) defining a flow channel and a fire damper blade (4) movable between a first position in which the flow channel is open, and a second position in which the flow channel is closed. The fire damper blade (4) has seal means (14) configured to seal against the inner wall of the damper body (2) in the closed position. The fire damper (2) further comprises an arrangement (12, 13, 15) configured to stop and lock the fire damper blade (4) in the closed, sealed position so that movement of the fire damper blade (4) towards the open position is prevented.