FIELD: fire safety.
SUBSTANCE: fire safety valve containing a body with an inlet and an outlet, a flap on a horizontal axis fixed on capronic spigots. According to the invention the body is made with two-chambers with outlets located on the same plane, and the chambers are located one above the other and are interconnected by a transitional hole. The flap with its upper edge is fixed on the horizontal rotary axis and installed in the lower chamber in the plane of the inlet, and the size of the flap from the rotary axis to the free edge is less than the distance between the planes of the inlet and outlet.
EFFECT: invention allows the elimination of the door blocking of the evacuation path when the smoke removal system is switched on by reducing the difference of aerodynamic pressure on the door leaf.
2 dwg
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