Device for closing a ventilation conduit, e.g. a fire-resistant valve or smoke ejection point, includes flap pivotally mounted inside frame along axis mid-length along the frame

摘要

The device includes a refractory material frame (3) designed to be fixed relative to an opening to be closed and a flap (2) pivotally mounted in the frame about a rotation axis (5) mid-length along the opening. The flap and frame are respectively formed from two different size flap elements (2a,2b) and two different size frame elements (3a,3b), with the two elements arranged head-to-tail relative to each other, with the outer dimensions of the flap matching the inner periphery of the frame. An Independent claim is included for a process for fabricating a frame and flap of the above closure device.