Needle valves are precision control valves engineered to provide accurate regulation of flow in fluid and gas systems. They feature a slender, tapered needle-like plunger that fits precisely into a conical seat, allowing for fine adjustment of flow rates. This makes them ideal for low flow applications where tight control is essential, such as in instrumentation lines, sampling systems, and calibration processes. The gradual threading action enables operators to make incremental adjustments, delivering exceptional control over pressure and flow.