CONTROL VALVE Russian patent published in 2002 - IPC

FIELD: pipeline fittings. SUBSTANCE: control valve has body including interconnected the first and second flowing channels, revolving bowl-shaped shut-off member located inside valve body, and shaft running out of valve body for revolving of shut-off member. Internal surface of shut-off member presents a surface of revolution with revolving shaft located on its central axis. Shut-off member side has at least one hole. Said hole communicates with valve body flowing channels when valve is open. Valve body is made with extension of one of flowing channels. External surface of said extension presents a surface of revolution coaxial with internal surface of shut-off member, and adjoining internal surface of shut-off member. Its side wall has at least one hole. It is located so that with valve open it at least partially shuts off hole of flowing channel of tension. In closed position of valve, hole of flowing channel extension is shut off by shut-off member. Extension in body is located on side of the second flowing channel. Edges of holes in said flowing channel extension have seals adjoining the shut- off member. EFFECT: reduced friction forces in revolving valves to ensure accurate control of flow rate. 7 cl, 6 dwg