FIELD: fire-fighting equipment of pipeline for supply of highly inflammable working media, specifically, protection of drilled wells in recovery of oil and gas. SUBSTANCE: fire valve has hinge triangular levers- flaps intended for jointing with valve closing to form body with its top directed against flow. Flap axes are located in front part of central bushing secured with body by means of tail part. Located in blind longitudinal sockets of tail part are rods from material with shape memory. Rod free ends are engageable with rear end face of movable driving bushing. This bushing is located between body and central bushing and its front end is kinematically connected with flap shoulders. Installed between driving and central bushing are engageable with them member flexible compressed in valve closing. EFFECT: complex improvement of fire valve design for its practical application. 4 cl
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