Duplex Valves

About Duplex Valves

What Is Duplex and Why Is It Used in Valves?

Duplex stainless steel is a type of stainless steel that combines both austenitic and ferritic microstructures, offering a balance of strength, corrosion resistance, and toughness. It typically contains higher levels of chromium, molybdenum, and nitrogen, making it much more resistant to stress corrosion cracking and pitting than standard stainless steels. This makes duplex an excellent material choice for valves in harsh and corrosive environments.

Why Duplex for Valves?

• High Corrosion Resistance: Especially against chlorides, seawater, and chemical attack.
• Exceptional Strength: Up to twice the yield strength of standard stainless steels.
• Good Weldability and Fatigue Resistance: Ideal for critical applications with high mechanical demands.
• Long Service Life: Reduces maintenance and replacement costs in tough environments.

Common Applications of Duplex Valves

• Oil & Gas Industry: For offshore and subsea applications, especially in salty or corrosive environments.
• Chemical Processing: Handles aggressive chemicals and high pressures.
• Desalination Plants: Withstands seawater exposure over long periods.
• Marine & Shipbuilding: Used in ballast and cooling systems.
• Pulp & Paper Mills: Resists acidic and caustic chemicals used in processing.