SEAT OF HOT GAS FLOW RATE CONTROL Russian patent published in 2012 - IPC F16K5/12 

FIELD: machine building.

SUBSTANCE: seat of hot gas flow rate control is made from erosion resistant metal alloy and has flow port. Inlet part of seat around flow port is rectangular and lined with bushing from carbon material. Surface of bushing from carbon material, which contacts the flap, and inlet surface of inlet seat part are evenly spaced. Evenly spaced surface of bushing from carbon material projects relative to evenly spaced surface of the seat, which is made from erosion resistant metal alloy.

EFFECT: higher reliability owing to reducing the erosion carry-over of the seat flow port.

5 dwg