FIELD: applicable in cross-country gas lines and at thermal and atomic powder stations for installation in pipe-lines of steam extraction from turbines. SUBSTANCE: the check valve has a body with medium inlet and outlet pipe connections, seat, fairing attached to the body and consisting of movable and fixed parts. The movable part has a shut-off member, bearing attached to it, guide shell, nozzle attached to it. The fairing fixed part has a fixed disk, fixed shell, fixed bush accommodating an axle serving as a bearing support furnished with a boss all attached to the fixed disk. Fitted on the axle is a number of springs preliminarily compressed by a pressure bolt, and having stops in the boss and bearing. EFFECT: enhanced reliability. 4 cl, 2 dwg
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