VALVE ASSEMBLY Russian patent published in 2012 - IPC F16K1/38 F16K1/54 

FIELD: machine building.

SUBSTANCE: valve assembly includes valve body (52) having inlet channel (54) and outlet channel (56), flow throttling hole (72) located in throttling zone of the valve body and providing the connection in the flow direction between inlet channel (54) and outlet channel (56), valve seat (70) located in the throttling area and valve plug (60) for variable cross-section valve. Plug (60) has cone with cone-shaped smooth chamfered wall (82), the near end connected to movable part of valve assembly, and dome-shaped surface on far end (88), which is smoothly changed for chamfered wall (82). Plug (60) has the possibility of being offset between open and closed position. Plug (60) is installed selectively in certain position of the valve to change the carrying capacity of valve assembly. Seat (70) has the first end, the second end and support surface located between the first and the second ends. Seat (70) has outward chamfered surface passing from support surface to the first end. The second end of seat (70) passes beyond the near end of plug (60) to movable part of valve assembly when plug (60) is in closed position. There is a version of design of valve assembly and method of selective control of the flow characteristics.

EFFECT: providing effective specified carrying capacity of valve without formation of bistable flow or vibration in the throttling zone.

16 cl, 5 dwg