FLAP ASSEMBLY FOR CLOSING VENTILATION CHANNELS

摘要

A flap assembly to close ventilation channels has one of two sheets of flapss with drive for re-installation of those and frame in walls of each channel equipped with seal in perimeter of adjoining of flap sheet. The flap sheets are rigidly fixed on common horizontal axis with possibility of turn from one drive, at that axis divides sheet of the flap into two equal in weight and dimensions parts, frame consists of two halves placed at different sides of sheet, and at closing two parallel channels of ventilator unit with working and reserve fans the flap sheets are installed at angle one with respect to another, at that one sheet closes the channel of the main ventilator and the other one opens the channel of operating one.