CHECK VALVE Russian patent published in 2012 - IPC F16K15/02 F16K11/04 E21B34/08 

FIELD: machine building.

SUBSTANCE: check valve comprises body with connection branch pipes for main component, mainly, oil and dischargeable component, mainly, mix of oil and gas. Shut off element consists of fixed and moving parts interacting over common equidistance surface and is made up of, preferably, of seat with spring-loaded disc arranged in inner unit case. Said inner block represents a shaped solid of revolution, preferably, a cylinder, arranged inside valve body along dischargeable component line. Shutoff element lengthwise axis is located perpendicular to dischargeable element branch pipe axis. Chamber communicated via channels with valve body inner chamber is arranged above valve disc. Said channels are open upstream. Cover is fitted in valve body mating part to lock inner unit with shutoff element. Said inner unit is heat-isolated from valve body by nonmetallic ring seals. Note here that gas chamber is arranged between said inner unit and valve body. Inner unit case face opposite the cover accommodates tie rod, mainly, cylindrical. One end of said tie rod interacts with inner unit case while its opposite shaped end interacts with valve body cover. Valve body cover represents hollow cylinder with one closed end face to make closed gas chamber inside said cover, between cover end face and inner unit end face. Clearance is provided between cover thrust surface and inner unit face.

EFFECT: higher reliability.

2 dwg