The self-operated nitrogen sealing device regulating valve primarily consists of a quick-release valve and a self-operated low-pressure regulating valve, along with components such as pressure springs, a pilot valve, and pulse pipes. It is mainly used to maintain a constant pressure of the protective gas (typically nitrogen) at the top of containers, preventing direct contact between the material inside and air. This safeguards against material volatilization, oxidation, and ensures container safety, making it particularly suitable for gas sealing protection systems in various large storage tanks.