2205 National Standard Flange Gate Valve

2205 (022Cr22Ni5Mo3N / S32205) is a ferritic-austenitic stainless steel designed to offer a superior balance of properties:

• High Yield Strength: Approximately double that of austenitic stainless steels (like 316L), allowing for a more rigid and durable valve body under high pressure.
• Exceptional Pitting Resistance: Superior performance in chloride-bearing environments, significantly reducing the risk of localized corrosion.
• SCC Resistance: The dual-phase microstructure provides high resistance to Chloride Stress Corrosion Cracking (SCC), a common cause of failure in chemical processing.
• Erosion Protection: Harder surface properties make it more resistant to the wearing effects of high-velocity fluids.

Features

• GB Standard Compliance: Manufactured to GB/T 12234, GB/T 9113, and GB/T 12221, ensuring full dimensional compatibility with domestic Chinese piping systems.
• Full Bore Architecture: The gate retracts completely, providing a straight-through flow path with minimal pressure loss and no obstruction.
• Reliable Wedge Sealing: Features a wedge-type gate that provides a tight, leak-proof shut-off, ensuring safe isolation for maintenance or emergency scenarios.
• Rising Stem (OS&Y): The outside screw and yoke design keeps the stem threads outside the media, preventing corrosion and allowing for easy lubrication and visual status checks.

Specifications

Applications

• Chemical & Petrochemical: Refineries and chemical processing units handling chlorides and organic acids.
• Marine Engineering: Seawater cooling systems, offshore oil platforms, and ship ballast lines.
• Water Treatment: Desalination plants and wastewater facilities where high corrosion resistance is mandatory.
• Pulp & Paper: Handling corrosive liquors and bleaching agents in paper manufacturing.