Views: 0 Author: J-VALVES Publish Time: 2024-10-23 Origin: Site
Ultra-low temperature conditions are commonly found in fields such as liquefied natural gas (LNG) storage and transportation, and cryogenic separation processes, with operating temperatures as low as -162°C or even lower. Under such extreme conditions, the material selection and anti-freezing structure design of ball valves become the core to ensure the safe and stable operation of equipment.
In terms of materials, the valve body usually adopts austenitic stainless steel (such as 304L, 316L) or nickel-based alloys (such as the Inconel series). These materials can still maintain good toughness and strength in low-temperature environments, avoiding cold brittle fracture. The ball material mostly uses stainless steel with extremely low carbon content or surface-hardened alloys to enhance wear resistance and sealing performance. The seals need to use special low-temperature elastomers, such as fluoroelastomer (FKM), polytetrafluoroethylene (PTFE), or reinforced materials filled with carbon fiber, to ensure excellent resilience and anti-deformation ability at low temperatures.
