2205 Duplex National Standard (GB) Flange Ball Valve is a high-strength, corrosion-resistant isolation valve specifically engineered for standardized industrial piping systems. By utilizing 2205 Duplex Stainless Steel and adhering to the GB/T 12237 standard, this valve provides a perfect balance of elite mechanical durability and superior resistance to chloride-induced corrosion.
Description
2205 (022Cr22Ni5Mo3N / CD3MN) is a ferritic-austenitic stainless steel designed for environments where standard 304 or 316L alloys reach their limits:
- Superior Strength: Approximately double the yield strength of standard austenitic stainless steels, allowing the valve body to handle higher pressure cycles and mechanical stress with ease.
- Elite Corrosion Resistance: Exceptional resistance to pitting and crevice corrosion, particularly in seawater, brine, and acidic chemical environments.
- Stress Corrosion Cracking (SCC) Defense: The unique dual-phase microstructure provides inherent protection against chloride-induced SCC, ensuring long-term integrity in pressurized industrial lines.
Features
- GB Standard Compliance: Fully compliant with GB/T 12237 (design), GB/T 9113 (flange), and GB/T 12221 (face-to-face), ensuring seamless technical integration into National Standard industrial infrastructure.
- Full Bore Flow Efficiency: The internal diameter of the ball matches the pipe’s bore, providing an unobstructed flow path that minimizes turbulence and ensures negligible pressure drop across the valve.
- High-Integrity Sealing: Equipped with precision-ground 2205 duplex balls and advanced seat materials (such as RPTFE or PPL). This ensures a bubble-tight, leak-proof seal even after frequent operation in harsh media.
- Fire-Safe & Anti-Static Design: Typically includes an anti-static device to discharge built-up electricity and a fire-safe structure to maintain sealing integrity in emergency high-heat scenarios.
- Reliable Actuation: The quarter-turn mechanism is optimized for smooth torque, making it suitable for manual hand-levers, gear operators, or automated pneumatic and electric actuators.
Specifications
| Feature | Specification |
| Design Standard | GB/T 12237 |
| Flange Dimensions | GB/T 9113 / JB/T 79 |
| Face-to-Face | GB/T 12221 |
| Body Material | 2205 Duplex Steel (022Cr22Ni5Mo3N / CD3MN) |
| Pressure Rating | PN16, PN25, PN40, PN64, PN100 |
| Seat Material | PTFE, RPTFE, PPL, or Metal-to-Metal |
| Testing Standard | GB/T 13927 / JB/T 9092 |
Applications
- Chemical Processing: Handling aggressive organic acids, chemical slurries, and chloride-bearing fluids.
- Marine & Offshore: Seawater cooling systems, desalination plants, and offshore production platforms.
- Oil & Gas: Upstream and midstream transport of fluids requiring high mechanical strength and corrosion defense.
- Water Treatment: High-pressure reverse osmosis (RO) systems and industrial brine handling.
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