VOLET DE DESENFUMAGE

摘要

The flap (110) has a blade (114) comprising a main surface (114p) rectangularly directed towards a frame (112) and rotatably mounted on the frame. A rotation axis of the blade is located at a side of the blade for selectively blocking an opening (113). The main surface of the blade is limited in a blocked position of the blade. An extension of a projection (112p) of the frame is provided perpendicular to a base plane (112b). An intumescent joint (116) is arranged at side surfaces (1141) of the blade when the joint is in the blocked position of the opening.