ASTM A351 CD4MCU Check Valve

An ASTM A351 CD4MCU check valve is an automatic non-return valve cast from Grade CD4MCu duplex stainless steel (UNS J93370), specifically engineered to prevent backflow in severe abrasive, highly corrosive chemical slurries. The CD4MCu duplex alloy delivers an exceptional combination of high hardness (resisting slurry erosion) and outstanding resistance to chloride pitting, stress corrosion cracking, and sulfuric acid attack compared to standard 316 stainless steel. Conforming to standards such as API 594, ASME B16.34, and API 6D, these heavy-duty non-return valves are primary specifications in phosphoric acid production, paper pulp bleaching, and mining mineral processing, allowing process engineers to protect pumps from backflow damage in harsh slurry services by importing certified ASTM A351 CD4MCU check valves directly from specialized manufacturers in China via our advanced B2B commercial platform.