In the modern industrial field, nitrogen, due to its inert and dry properties, is widely used in scenarios such as protection of electronic devices, food preservation, chemical transportation, and biomedicine. As the core control component of the nitrogen gas supply system, the Chinese nitrogen pressure stabilizing valve automatically adjusts the valve opening to maintain a constant outlet pressure, effectively responding to fluctuations in flow and changes in inlet pressure, ensuring process stability and equipment safety. However, the special properties of nitrogen (such as dryness, inertness, and easy leakage) pose higher requirements for the selection of nitrogen pressure stabilizing valves in China. This article will deeply explore the three core key points of its application scheme: material selection, sealing performance, and gas system compatibility, helping engineers and purchasing personnel make precise selections and improving system reliability and efficiency.