Plug for a modulating control valve for a steam turbine.

摘要

A control valve for a steam turbine having a toroidal shaped seat and a mushroom shaped plug with a frustoconical shaped portion so disposed in the dome of the mushroom shaped plug to mate with the toroidal seat, the frustoconical shaped portion having an included angle of approximately 68 DEG and there being a sharp transition where the small diameter end of the frustoconical portion meets the top of the dome portion.