FIELD: machine building.
SUBSTANCE: valve is designed for system of antismoke ventilation. The valve consists of conic case wherein there is installed axially travelling conic member. The case and member have inlet and outlet orifices equipped with holders. Under the outlet orifice of the conic member there are arranged flexible plates secured in a lower wall of an air duct and additionally connected with an upper wall of the air duct by means of flexible elements with inclusions of fusible metal. The holders of the inlet orifice of the conic member and outlet orifice of the conic case are made in form of rings. The holders of the inlet orifice of the conic case and outlet orifice of the conic member have a zigzag shape; also, packing flexible heat resistant material is positioned in space formed with the conic case and its holder.
EFFECT: raised efficiency of smoke removal.
4 dwg
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