Views: 0 Author: J-VALVES Publish Time: 2024-04-26 Origin: Site
Ball valves, as an important type of industrial valve, are widely used in fields such as petroleum, natural gas, chemical engineering, and power. With the continuous development of industrial technology, the performance requirements for ball valves are getting higher and higher, especially under extreme working conditions such as high temperature, high pressure and strong corrosion. The research and application of high-performance ball valve materials have become the key to improving the performance of ball valves.
Superalloys Superalloys are important choices for high-performance ball valve body materials, especially under high-temperature and high-pressure working conditions. For example, superalloys such as Inconel 718 and Inconel 625 have excellent high-temperature strength, oxidation resistance, and creep resistance. These materials can maintain good mechanical properties at extreme temperatures and are suitable for high-temperature ball valves in aerospace, petrochemical, and other fields.
Super Stainless Steels Super stainless steels (such as 316L, 347H) have good corrosion resistance and high strength and are suitable for corrosive medium environments. By adding elements such as molybdenum and copper, these materials have significantly improved pitting and crevice corrosion resistance and are widely used in the chemical and pharmaceutical industries.
Low-temperature Steels For low-temperature working conditions, such as liquefied natural gas (LNG) transportation and storage systems, low-temperature steels (such as ASTM A350LF2) are ideal choices. Low-temperature steels have good toughness and resistance to brittle fracture in low-temperature environments, ensuring the safe operation of ball valves under low-temperature conditions.
Polytetrafluoroethylene (PTFE) and its modified materials. PTFE is a commonly used sealing material, featuring excellent chemical corrosion resistance, low friction coefficient, and good self-lubricating properties. However, PTFE has low mechanical strength and is prone to creep. To overcome this shortcoming, researchers have developed carbon-fiber-filled reinforced PTFE, which significantly improves its mechanical properties and wear resistance.
Flexible graphite. Flexible graphite is a high-performance sealing material with good high-temperature resistance and chemical corrosion resistance. It exhibits excellent sealing performance under high-temperature and high-pressure conditions and is suitable for metal-sealed ball valves and high-temperature steam valves.
Titanium alloy. Titanium alloy has attracted attention due to its high strength, low density, and excellent corrosion resistance. Although the wear resistance of titanium alloy is poor, through micro-arc oxidation technology to harden the surface of titanium alloy, its wear resistance and corrosion resistance can be significantly improved.
