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Super Duplex Valves

Super Duplex Valves

African Valve is a premier Super Duplex Valves Manufacturer in Sudan, supplying high-performance valves engineered from advanced duplex stainless steels. These valves are ideal for demanding applications where extreme strength, corrosion resistance, and durability are required—especially in chloride-rich and high-pressure environments. Super Duplex materials offer a combination of austenitic and ferritic structures, making them exceptionally reliable in offshore, marine, and chemical industries.

Function & Working

Super Duplex valves control the flow of media in critical process systems exposed to corrosive chemicals or seawater. Their superior mechanical strength and corrosion resistance ensure consistent performance, even under fluctuating pressure and temperature. These valves prevent pitting, crevice corrosion, and stress corrosion cracking, significantly extending service life in aggressive environments.

Advantages

  • Superior resistance to chloride-induced corrosion and stress cracking

  • Higher strength than standard stainless steel or Duplex grades

  • Excellent weldability and mechanical integrity

  • Reduced weight due to thinner wall thickness without compromising strength

  • Long-term durability with low maintenance requirements

Industries Served

  • Offshore Oil & Gas Platforms

  • Desalination Plants

  • Marine and Shipbuilding

  • Chemical and Petrochemical Industries

  • Power Generation Facilities

  • HVAC and District Cooling Systems

  • Mining and Mineral Processing

Key Components

  • Valve Body – Made from Super Duplex (UNS S32750 / S32760) for strength and corrosion resistance

  • Disc/Plug/Ball – Precision-machined for tight shut-off in high-chloride applications

  • Stem – Corrosion-resistant duplex alloy for high-cycle stability

  • Seals and Seats – PTFE, metal-seated, or elastomeric based on application

  • Bonnet – Bolted or pressure-sealed, with optional vent/drain ports

  • Actuation Interface – Compatible with gear, pneumatic, or electric actuation

Technical Specifications

  • Design Standards: ASME B16.34, API 6D, ISO 15156

  • Body Materials: Super Duplex S32750, S32760, F55, F53, Zeron 100

  • Trim Options: Super Duplex, Inconel, Stellite, PTFE

  • Pressure Ratings: Class 150 to 2500 / PN10 to PN250

  • Size Range: DN15 to DN900

  • End Connections:

    • Flanged (ANSI B16.5, DIN, JIS)

    • Butt Weld (BW – Ideal for welded high-pressure lines)

    • Socket Weld (SW – For compact installations)

    • Threaded (NPT – For modular or skid-based systems)

  • Actuation Options: Available with electric, pneumatic, gear-operated, or manual operation

  • Special Features:

    • High resistance to seawater, hydrogen sulfide, and chlorides

    • Fire-safe and anti-blowout stem design

    • Engineered reliability from a certified Super Duplex Valves Manufacturer in Sudan

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