Fluid control valve

A system including an anti-G garment and a control valve for controlling inflation of said anti-G garment with pressurized gas from a high pressure gas supply, said pressurized gas control valve including a body with an elongate chamber in which an elongate valve member is moveable axially, the chamber having first and second axial end chamber parts and an intermediate chamber part, a pressurized gas inlet opening in a chamber wall of the intermediate part which provides for the inflow of pressurized gas into the chamber, and an outlet from the chamber at the second axial end part of the chamber where a valve edge is provided, the valve member including a first portion which at least substantially closes the first axial end part of the chamber and is moveable in the first axial end part of the chamber between the inlet opening and the first axial end part of the chamber, wherein the valve member has an intermediate portion which is moveable in the intermediate chamber part and has a cross sectional area less than that of the intermediate chamber part thus to permit the inflow of pressurized gas from the inlet opening, and a second portion including a flow control device which co-operates with the valve edge to control gas flow depending upon the axial position of the valve member in the chamber, wherein the second portion of the valve member, including the entire flow control device, is receivable in the second axial end part of the chamber, the control valve controlling a servo gas pressure depending upon G-forces experienced, and wherein the system includes a servo pressure operated valve for providing high pressure gas to the anti-G garment depending upon the servo gas pressure, and wherein the second portion of the valve member is slidable in and out of the second axial end of the chamber without the flow control device making physical contact with the valve edge.