SAFETY VALVE Russian patent published in 1999 - IPC

FIELD: wide range of pressures of aggressive media. SUBSTANCE: valve has body with seat and medium inlet and outlet branch pipes, shut-off member with guide which is engageable with double-arm lever: one arm carries weight and other arm is connected with support. Guide of shut-off member and second arm of lever are connected with support by means of flexible suspensions. Guide is made in form of bush. Valve includes also stem mounted under weight for axial displacement. EFFECT: enhanced tightness and reliability of valve in wide range of temperatures and pressures of aggressive media. 3 cl, 1 dwg