In high-temperature and high-risk medium working conditions such as heat transfer oil, high-pressure steam, and molten salt, conventional control valves often experience "leaking, spilling, dripping, and oozing". The Chinese LN85W Bellows Control Valve adopts a double-layer 316L bellows + graphite + Inconel 718 spring energy storage sealing system, achieving true zero external leakage (ISO 15848-1 BH level), saving 2% to 5% of energy consumption for users, and completely eliminating safety hazards. It is an upgrade standard for high-temperature production lines in petrochemicals, chemical fibers, nuclear power, lithium battery cathode materials, etc.