In the field of industrial automation, the control valve, as the core component of process control, plays a crucial role in precisely regulating the flow rate of fluids. Among them, the Chinese small-flow single-seat control valve, due to its excellent control performance and compact design, is widely used in industries such as chemical engineering, pharmaceuticals, food and beverage, and water treatment, especially in scenarios requiring the handling of trace amounts of fluids (such as feedstock for reactors, precise dosing systems). This article will deeply explore the selection points of the Chinese small-flow single-seat control valve, focusing on the three core elements of precise control, parameter matching, and applicable media, to help engineers and purchasers make professional decisions and enhance system efficiency and safety.