Needle & Regulator ValvesA valve is a device that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically valves fittings, but are usually discussed as a separate category. V46A Catalog 2D / 3D Spec. Working Pressure : 10,000 psig Packing adjustment externally Stainless Steel and Carbon Steel DK-Lok 1/4 to 1/2 in. OD Pipe thread 1/4 to 3/4 in.Brief Description Chevron PTFE packing provides far improved sealing integrity. Packing below the stem threads is to isolate threads from system fluid and lubricant washout. Non-rotating stem tip closure for long-life and leak-tight shut-off. Lock plate ensures the valve fastened to the body.