What is the main function of a needle valve?

The main function of a needle valve is to regulate fluid flow in a precise manner. It features a slender, tapered plunger that fits into a corresponding seat, allowing for fine adjustments in flow rate. This makes needle valves particularly useful in applications requiring accurate control, such as in gas or liquid systems where small flow changes can significantly impact performance. They are commonly used in laboratories, instrumentation, and various industrial processes.