Patent ID: 8136547

Claim:
A poppet valve, comprising: a valve body, said valve body having a central axis, a flow inlet, and a flow outlet; a poppet guide disposed inside the valve body so as to form a first portion of a flow passage from the flow inlet to the flow outlet, said flow passage being formed between an inside surface of the valve body and an outside surface of the poppet guide and passing through at least one hole in the poppet guide; a poppet shutter disposed inside the poppet guide so as to form a second portion of the flow passage between an outside surface of the poppet shutter and the inside surface of the valve body; and a converging-diverging flow passage formed by a portion of an outer surface of the poppet shutter and a corresponding portion of an inner surface of valve body, wherein the converging-diverging flow passage includes (i) a convergent portion, (ii) a minimum area portion, and (iii) a divergent portion.