CONTROL VALVE Russian patent published in 2009 - IPC F16K1/54 F16K3/24 F16K31/14 E21B43/12 

FIELD: gas and oil industry.

SUBSTANCE: invention relates to control valves and accessories to be used in gas and oil production. Proposed control valve comprises a body with central bore accommodating shut-off member, inlet and outlet branch pipes, and combined drive mechanism. The latter consists of two one-way mechanisms and one counter-propagating mechanism. Aforesaid shut-off member comprises one cartridge with two through holes and throttle blade representing a hollow cylinder with inner annular ledge. The latter features bearing faces equally spaced from outer faces of the throttle blade linked up with the rod. The rod stem accommodates aforesaid drive mechanisms. Mechanical or manual drive mechanism seats, partially, on the stem extension and is partially aligned with automatic mechanism of the rod backstroke. Combined drive housing has a profiled cover with a cup directed inside the said housing. Aforesaid stem is furnished with a device designed to convert rotary motion of aforesaid mechanical or manual drive into reciprocation of aforesaid rod.

EFFECT: reduced metal input, longer life and higher efficiency.

19 cl, 8 dwg