PIPE VALVE AND ITS ASSEMBLY PROCESS Russian patent published in 2003 - IPC

FIELD: pipeline valves. SUBSTANCE: pipe valve designed to shut off high-pressure pipeline so as to ensure tightness in feeding medium under pressure on any side of gate valve has body with fastening members for mounting it in pipeline and flow passage accommodating spring-loaded seats. Each seat is built of outer and inner bushings for locking outer bushing in body wall. Flat actuating gate valve with flow port is installed between bushings. Flow passage diameter equals outer diameter of seats. Springs are disposed between bushings. Pipe valve assembly process includes installation of inner and outer bushings of seats in flow passage. Prior to installation of bushings in body actuator-mounted gate valve is placed in body. Then inner bushings, springs, and outer bushings are inserted outside of body. Outer bushings are locked in body walls and spring pressure is adjusted. EFFECT: enhanced service life and operating reliability due to facilitated assembly and maintenance. 4 cl, 2 dwg