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Double Flanged Check Valve Non-Return Valve with Double Flanges Connection. Customized Color Options: Available in various customized colors to meet specific project requirements. OEM and ODM Services: Full customization, minor customization, and design-based customization services available. Wide Size Range: Available in sizes from DN40 to DN1200 (1 inch to 48 inches) for diverse applications. Multiple Material Options: Body options include Cast Iron and Ductile Iron; Plate options include CF8, CF8M, and Bronze. Versatile Seat Materials: Seat materials include NBR, EPDM, FKM, and Neoprene for different media compatibility. Multi-Standard Compliance: Meets DIN, BS, UNI, ISO, ANSI, AS, and JIS standards for global compatibility.