Customized Casting Carbon Steel Pipe System Butterfly Valve Part Valve Disc

It is the core rotating component inside a butterfly valve, also called the valve plate or vane. Shaped like a disc, it rotates on a shaft to control or shut off fluid flow. Manufactured via investment casting (lost-wax casting), this process allows for complex geometries, excellent surface finish, and high dimensional accuracy in a wide range of metal alloys.

Design Flexibility: Produces complex, near-net-shape parts with integrated features (like shafts, profiles, contours) that are difficult or impossible with other methods. Superior Surface Finish: As-cast surface finish is excellent, reducing post-machining and improving flow characteristics. Material Versatility: Can cast a vast range of alloys, including stainless steel, duplex, super duplex, Hastelloy, Monel, and carbon steel. Dimensional Accuracy & Consistency: High precision for tight tolera

We cast discs for all major valve designs and applications: Concentric (Resilient-Seated) Discs: For general service with rubber/elastomer liners. Double/ Triple Offset (High-Performance) Discs: The disc profile is offset from the seat and shaft centerline to reduce wear and enable tight shut-off in metal-seated valves. Lug & Wafer Style Discs: For different mounting configurations. V-Port/ Characterized Discs: For precise flow control (equal percentage, linear characteristics). Custom/Proprieta

Material selection is based on fluid media, pressure, temperature, and corrosion requirements: Stainless Steel: CF8 (A351, equivalent to 304), CF8M (A351, equivalent to 316) - Most common for corrosive services. Duplex & Super Duplex Stainless Steel: CD3MN (F51/2205), CD3MWCuN (F55/2507) - For high strength and chloride stress corrosion cracking resistance. Alloy 20 (CN7M): For sulfuric acid applications. Monel (M35-1/ N04400), Hastelloy (N10276): For severe corrosive environments. Carbon Steel

We provide a complete, ready-to-install disc: Heat Treatment: Solution annealing, quenching, tempering as per material specifications (ASTM A351, A743, A744). Precision CNC Machining: Critical surfaces are machined: Sealing surface (perimeter edge) to required Ra finish and angle. Shaft bore(s) to precise diameter and perpendicularity. Mounting holes/ features. Non-Destructive Testing (NDT): Liquid Penetrant Testing (PT) or Radiographic Testing (RT) as specified to detect surface/subsurface defe