Wholesale China DN80 Welded Butterfly Valve - High-Flow, Low-Torque Design from Reliable Suppliers and Factory Manufacturers, Suppliers
Product Description
Product Parameters
This valve is a wafer-style, lug-designed welded butterfly valve for permanent installation on DN80 (3-inch) IBC container outlets. It features a quarter-turn operation with a low-torque, high-flow design. Standard specifications include a pressure rating of PN10/16 and an extended temperature range from -30°C to +180°C, contingent upon seal selection. The valve is equipped with a reinforced stainless steel stem and a standardized ISO 5211 mounting pad for seamless integration with pneumatic or electric actuators, facilitating automated process control.
Production Raw Materials
The primary construction utilizes 316/316L stainless steel for the valve body, disc, and stem, selected for its outstanding resistance to pitting and corrosion from chlorides and various chemicals. The critical sealing component is a resilient seat, available in PTFE, EPDM, or FKM (Viton®), ensuring a tight seal and long service life across diverse media. All materials in fluid contact are certified to meet FDA, EU 1935/2004, and other relevant industry standards for hygiene and safety.
Production Process
Manufacturing initiates with precision CNC machining of all metallic parts to achieve exacting tolerances and an optimal surface finish (typically Ra <0.8 µm). The disc profile is engineered for efficient flow and perfect seal engagement. The valve body welding ends are meticulously prepared to ensure a perfect fit to standard IBC flanges. The assembly is then aligned and joined using automated Orbital TIG welding under an inert argon atmosphere, guaranteeing a consistent, high-strength, and sterile weld seam. Post-weld treatments include cleaning, electro-polishing, and passivation to restore and enhance corrosion resistance.
Usage Scenarios
This DN80 welded valve is ideal for high-flow rate applications requiring a secure, maintenance-free connection. Key industries include:
Chemical & Petrochemical: For bulk transfer of solvents, acids, alkalis, and polymer solutions.
Pharmaceutical & Biotechnology: In fixed piping systems for large-volume buffer solutions, media preparation, and process water.
Food & Beverage: Handling high-volume ingredients like edible oils, syrups, and dairy bases in permanent process lines.
Water Treatment & Energy: Managing large flows of treated water or chemical dosing in industrial plants.
Quality Inspection
Each valve undergoes a stringent multi-point quality assurance protocol. This includes dimensional accuracy verification, visual and dye penetrant inspection (DPT) of all weld seams, and surface finish analysis. Every unit is subjected to a 100% pressure test, including a shell test and a seat leakage test per ISO 5208/API 609 standards, to verify zero leakage at 1.5 times the rated pressure. A final functional test ensures smooth, friction-free operation throughout its 90-degree travel.
Packaging & Shipping
To preserve the sanitary finish and prevent damage, each valve is thoroughly cleaned, dried, and fitted with protective plastic caps on all ports. It is then wrapped in VCI (Vapor Corrosion Inhibitor) anti-rust paper and sealed in an individual polyethylene bag. Valves are securely packed in custom-fit, foam-lined corrugated cartons to prevent movement during transit. All packaging is clearly marked with product identification, material grade, and unique batch traceability numbers.
After-Sales Service
We provide full material traceability and mill test certificates with each product. Our comprehensive after-sales support includes technical documentation for proper welding integration and system design consultation. A standard warranty covers manufacturing defects. To ensure long-term performance, we offer readily available maintenance seal kits and provide expert troubleshooting support. Our goal is to ensure complete customer satisfaction and reliable valve performance throughout its lifecycle.
