Duplex 2205 Check Valve

A Duplex 2205 check valve is an automatic non-return valve cast or forged from Grade 2205 duplex stainless steel (UNS S31803 / S32205), specifically engineered to prevent backflow in aggressive, high-chloride process media. The dual-phase metallurgical microstructure (combining roughly equal proportions of austenite and ferrite) delivers twice the yield strength of standard 316 stainless steel along with exceptional resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. Conforming to standards such as API 594, API 6D, and ASME B16.34, these corrosion-proof non-return valves are primary specifications in reverse osmosis desalination plants, offshore oil platforms, and marine chemical headers, allowing maritime engineers to protect upstream pumps from backflow damage by importing certified Duplex 2205 check valves directly from specialized manufacturers in China via our advanced B2B commercial platform.