Stainless steel casting

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The housing is the core pressure-bearing and structural foundation of the entire butterfly valve assembly. We specialize in producing high-quality stainless steel butterfly valve housings, integrating advanced casting processes with ultra-precision CNC machining. We offer various materials, including 304 (CF8) and 316 (CF8M), to ensure every housing possesses exceptional dimensional accuracy and material integrity, providing a robust, reliable, and long-lasting performance guarantee for your valve system.IntroductionThe butterfly valve housing is the foundational core of your entire valve assembly. Its integrity, dimensional accuracy, and material quality directly determine the valve's sealing performance, service life, and overall reliability. At Hansheng Automation, we don't just cast metal; we engineer the bedrock of your fluid control system.We specialize in producing superior-quality stainless steel butterfly valve housings, leveraging state-of-the-art casting processes and the same ultra-precision machining philosophy that defines our world-class gear and motion control components. Choose our valve bodies for performance that you can trust, cycle after cycle.Features & BenefitsExceptional Casting Accuracy: Advanced Sand Casting and Lost Foam Casting processes, controlled by CNC automatic mold making equipment, produce near-net-shape valve bodies. Standard free tolerance of ±1mm and specified tolerance reaching ±0.03mm, minimizing material waste and reducing machining time for cost-efficiency and faster lead times.Flawless Machining for Perfect Sealing: Precision machining capabilities achieve tolerances as tight as ±0.005mm for critical dimensions like the valve seat bore and stem holes, with surface finishes reaching a super-mirror level of Ra 0.1. Ensures optimal gasket seating, minimal operating torque, and extended valve lifespan.Comprehensive Material Integrity: Full range of stainless steel grades, including 304/CF8, 316/CF8M, and 316L/CF3M. Every batch of raw material undergoes rigorous spectral analysis to guarantee chemical composition, ensuring flawless performance in harsh chemical, marine, or sanitary environments.Scalable Production for Any Project: Capable of handling small, intricate valve bodies to large-scale industrial housings. Maximum casting size of 3800 x 1500 x 1200 mm and a fleet of Vertical and Horizontal Machining Centers (max processing size 2100 x 1060 mm), suitable for projects from prototype to high-volume production.Our ProcessEngineering Consultation & DFM: Work with your designs (or help you design) to ensure manufacturability and optimize for the casting process.In-House Mold & Pattern Making: Rapid and precise mold production using CNC equipment.Controlled Casting Process: Precise control over pouring temperature and cooling rates for optimal metallurgical structure.Heat Treatment: Solution annealing and other treatments to enhance mechanical properties and corrosion resistance.Precision CNC Machining: Multi-axis machining of all critical faces, bores, and threads in a single setup where possible to ensure perfect alignment.Rigorous Quality Assurance: 100% inspection of critical dimensions, material certification, and mandatory pressure testing.Technical SpecificationsParameterSpecificationCasting MaterialsStainless Steel (CF8/304, CF8M/316, CF3M/316L), Duplex Steel, Custom AlloysCasting ProcessesSand Casting, Lost Foam Casting, Gravity CastingMaximum Casting Size3800 x 1500 x 1200 mmCasting ToleranceFree Tolerance: ±1mm / Specified Tolerance: Down to ±0.03mmMachining ToleranceStandard: ±0.01mm / Precision: Down to ±0.002mmApplicable StandardsAPI 609, ASME B16.34, DIN, ISO, or as per customer requirementsTesting & InspectionSpectral Analysis (PMI), CMM Dimensional Inspection, Hardness Testing, NDT (Non-Destructive Testing), Hydrostatic Pressure TestingSurface FinishStandard Machined, Polished, Super-Mirror Finish (Ra 0.1)Our Commitment to QualityHansheng Automation applies its culture of precision from planetary gearboxes and harmonic drives to casting and machining. Valve housings are inspected using advanced CMM machines and verified by technicians experienced in tight tolerances. Every shipment includes a full quality documentation package, including material certificates and inspection reports.ApplicationsOil & GasChemical ProcessingWater & Wastewater TreatmentFood & BeveragePharmaceutical & BiotechPower GenerationMarine & ShipbuildingPulp & PaperFAQQ: What is the difference between CF8M (316) and CF8 (304) for a valve body?A: The primary difference is the addition of molybdenum in CF8M (316), which significantly enhances its resistance to chlorides and general corrosion. CF8M is preferred for marine, chemical, and coastal applications, while CF8 is a cost-effective option for general corrosive services.Q: Can you handle complex internal geometries for valve housings?A: Yes. The Lost Foam Casting process is ideal for creating complex, single-piece castings with intricate internal passages, reducing the need for welding or assembly and improving overall strength and integrity.Q: What is your typical lead time for a new valve housing project?A: Lead times vary based on complexity, size, and quantity. Typically, 4-6 weeks for mold creation and first article inspection (FAI). Production runs are faster after design approval.Q: What CAD file formats do you accept for quotation and manufacturing?A: Preferred 3D model files: STEP (.stp, .step), IGES (.igs), SolidWorks (.sldprt), Parasolid (.x_t). For quotations, 2D drawings in PDF or DWG are also acceptable.Q: What kind of surface finishes can you provide for the valve housings?A: Available finishes include: As-Cast, Shot Blasted / Sand Blasted, Standard Machined (typically 125 Ra or better), Polished, and Electro-Polished (mirror finish).Key Characteristics / Technical Specifications:Product: Stainless Steel Butterfly Valve HousingMaterials: CF8/304, CF8M/316, CF3M/316L, Duplex Steel, Custom AlloysCasting Processes: Sand Casting, Lost Foam Casting, Gravity CastingMax Casting Size: 3800 x 1500 x 1200 mmCasting Tolerance: ±1mm (free), down to ±0.03mm (specified)Machining Tolerance: ±0.01mm (standard), down to ±0.002mm (precision)Surface Finish: Standard Machined, Polished, Super-Mirror Finish (Ra 0.1)Applicable Standards: API 609, ASME B16.34, DIN, ISO, or as per customer requirementsTesting: Spectral Analysis, CMM Inspection, Hardness Testing, NDT, Hydrostatic Pressure Testing