CRITICAL FLOW VALVE WITH SQUEEZED SEAT RING Russian patent published in 2019 - IPC F16K1/42 F16K47/08 

FIELD: machine building.

SUBSTANCE: fluid valve comprising: a valve body having an inlet for fluid medium and an outlet for fluid medium, connected by a channel for fluid medium; a throttling device located in the fluid passage, and a fluid control member disposed movably within the fluid passage, wherein control element for fluid medium interacts with throttling device for fluid medium flow control through fluid medium channel; wherein the throttling device comprises: a clamped seat ring comprising a converging-divergent nozzle, and a holder pressing the seat ring into the valve body, wherein holder comprises upper housing part and skirt extending in direction from upper housing part and guiding movement of fluid control element, wherein the holder further comprises a fastening ring located adjacent to the seat ring, wherein the seat ring is at least partially located between the fastening ring and the valve body, wherein the holder further comprises a plurality of legs connecting the fastening ring to the skirt, wherein at least one leg of the plurality of legs is curved radially inward from the fastening ring to the skirt.

EFFECT: valve for critical flow with sealed ring is disclosed.

15 cl, 4 dwg