US Patent 9528631 Gas pressurized packing system for control valves

A gas pressurized packing system for use in a control valve may include a first packing member, a second packing member and a pressurized gas supply. The first and second packing members may be arranged about, respectively, lower and upper portions of an operating member that extends through a bore in the control valve. The pressurized gas supply may be configured to pressurize a portion of the bore arranged between the first and second packing members. The gas pressurized packing system may be implemented in a low fugitive emission control valve and a low fugitive emission control valve system.