FIELD: aircraft.
SUBSTANCE: invention relates to fire protection of helicopter auxiliary power unit. The valve contains a body (4), which is made of a refractory material, and contains at least one flap (9). Lugs (5) are fixed on the body (4), into which an axle (6) is inserted with hinged loops (7) mounted on it, on which at least one leaf (9) is fixed. An elastic element is placed between hinged loops (7) on the axis (6). The outline of the body (4) and the attachment point of each leaf (9) are provided with a seal.
EFFECT: improvement of tightness and isolation of the compartment, simplification of design, speed and reliability of operation.
7 cl, 2 dwg
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