Patent ID: 8770228

Claim:
A control valve for controlling a pressure and a flow rate of a fluid, comprising: an inlet; a speed reduction chamber having an inlet portion extending from the inlet; and an outlet, wherein fluid flowing from the inlet is brought to rotate about a main flow axis before flowing out of the outlet via the speed reduction chamber at a reduced pressure or flow rate, the speed reduction chamber being substantially concentric with the main flow axis and being in part divergent along the main flow axis, wherein the inlet portion of the speed reduction chamber is a void convergent along the main flow axis, wherein the speed reduction chamber has a hyperboloid divergent portion leading to the outlet, with the hyperboloid divergent portion having a maximum diameter greater than a maximum diameter of the inlet portion, and wherein a controllable flow inlet valve is disposed between the inlet and the inlet portion of the speed reduction chamber and wherein the speed reduction chamber has a conical divergent portion between the inlet portion and the hyperboloid divergent portion.