Manufacturers primarily produce nickel butterfly valves from nickel or nickel-based alloys. The core component is a disc-shaped butterfly plate that rotates within the valve body to open, close, or regulate flow. Engineers typically integrate a worm-gear reducer to provide the butterfly plate with self-locking capability, allowing it to halt at any position and enhance operational precision.
These valves feature diverse structural designs, such as the triple-eccentric type. During closure, this design ensures tight sealing by transitioning from line to surface contact, achieving zero leakage (e.g., ANSI B16.104 Class VI) when using elastomeric seats like fluororubber-coated nickel alloys. For large-diameter discs, designers often employ truss-like hollow structures to reduce weight while maintaining rigidity, improving the flow coefficient (Cv value) by 30% compared to traditional gate valves.
Engineers offer connection methods including wafer-type, flange-type, and butt-weld options, providing flexibility for various installation scenarios. Manufacturing processes include vacuum induction melting to ensure uniform composition, precision casting (up to CT4 grade accuracy), 5-axis CNC machining (sealing surface roughness Ra≤0.8μm), and surface treatments such as electroless nickel-phosphorus plating to enhance wear resistance. Factory testing involves helium mass spectrometry leak detection (leak rate ≤1×10⁻⁶ Pa·m³/s) and pressure cycle testing (100,000 cycles without failure).
These valves comply with global standards such as ASME B16.34 (US), EN 593 (EU), and GB/T 12238 (China). For nuclear applications, manufacturers ensure RCC-M certification, while food-grade variants meet FDA standards. Emerging technologies, such as nanocrystalline nickel alloys and gradient composite coatings, further enhance erosion and cavitation resistance. Through intelligent integration—including pressure sensors and IoT modules—manufacturers enable real-time seal failure alerts and remote maintenance, evolving nickel butterfly valves into smart fluid control solutions.