PLUG REVOLVING COCK Russian patent published in 1997 - IPC

FIELD: shut-off devices of hydraulic and pneumatic systems in gas and oil producing industry, oil refining and gas processing industries, chemical industry and other industries. SUBSTANCE: cock has body, plug with taper seat portion and passage with cylindrical trunnions. Threaded tail-piece is located on end of seat portion. Seat portion of plug has blind diametrically opposite cylindrical grooves which are coaxial relative to each other and perpendicular to passage of plug. Each groove whose diameter slightly exceeds diameter of passage has one bush-seal; cavity of each groove 12 and 13 inside bush-seal if filled with material of plug or with other material which differs from material of plug. EFFECT: enhanced reliability. 4 cl, 6 dwg