2507 Super Duplex National Standard Flange Globe Valve is a high-performance flow regulation valve designed for extreme industrial environments. Utilizing 2507 Super Duplex Stainless Steel and adhering to GB/T 12233 standards, this valve provides exceptional mechanical strength and unmatched resistance to localized corrosion, making it the premier choice for high-pressure, high-chloride applications.
Description
2507 (UNS S32750 / 022Cr25Ni7Mo4N) is a super duplex stainless steel with a high PREN (Pitting Resistance Equivalent Number) greater than or equal to 40. Its technical benefits include:
- Extreme Mechanical Strength: With a yield strength significantly higher than both 316L and standard 2205 duplex, it allows for a more compact and pressure-resistant valve design.
- Elite Chloride Resistance: Exceptional performance in highly concentrated chloride environments, offering maximum protection against pitting and crevice corrosion.
- SCC Immunity: The balanced ferritic-austenitic microstructure provides superior resistance to chloride-induced stress corrosion cracking (SCC).
- High Thermal Conductivity: Better thermal efficiency and lower coefficient of thermal expansion compared to traditional austenitic stainless steels.
Features
- Precision Flow Regulation: The globe valve’s linear motion design is ideal for frequent throttling. The tapered disc provides a consistent relationship between the valve position and flow rate, ensuring precise control.
- High-Pressure Integrity: The seat-and-disc configuration ensures a high-integrity seal when closed, making it safe for the isolation of hazardous chemical media or high-pressure gas.
- Standardized Compatibility: Fully compliant with GB/T 12233 (design), GB/T 9113 (flange), and GB/T 12221 (face-to-face), allowing for easy drop-in replacement in standardized piping systems.
- Advanced Stem System: Features an Outside Screw and Yoke (OS&Y) design. The operating threads are located outside the fluid path to prevent corrosion and allow for regular lubrication.
Specifications
| Feature | Specification |
| Design Standard | GB/T 12233 |
| Flange End | GB/T 9113 / JB/T 79 |
| Face-to-Face | GB/T 12221 |
| Body Material | 2507 Super Duplex Steel (022Cr25Ni7Mo4N) |
| Pressure Rating | PN16, PN25, PN40, PN64, PN100 |
| Temperature Range | -40°C to 250°C (Avoid long-term use above 300°C) |
| Testing Standard | GB/T 13927 / JB/T 9092 |
Applications
- Offshore Oil & Gas: Seawater injection, firewater systems, and subsea piping.
- Desalination Plants: High-pressure reverse osmosis (RO) systems and brine handling.
- Chemical Processing: Environments with high chloride concentrations and strong organic acids.
- Marine Engineering: Critical shipboard cooling and propulsion systems.
