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Duplex Ball Valve

South American Valve is a leading Duplex Ball Valve Supplier in Chile. A duplex ball valve is a type of ball valve constructed from duplex stainless steel. Duplex stainless steel is a material that provides excellent corrosion resistance and mechanical strength, making it well-suited for demanding industrial applications. The duplex ball valve design incorporates the use of a ball with a bore through it that can be rotated to control the flow of fluids.

South American Valve is a leading Duplex Ball Valve Supplier in Chile. Duplex ball valves are widely used in various industries, including oil and gas, chemical processing, offshore, marine, and water treatment. Their combination of corrosion resistance, mechanical strength, and versatile performance makes them a preferred choice for critical applications that require reliable flow control and durability.


  • Body
  • Ball
  • Seat
  • Stem
  • actuator


  • Corrosion Resistance: Duplex stainless steel offers superior corrosion resistance compared to standard stainless steels. It is highly resistant to pitting, crevice corrosion, and stress corrosion cracking, making it suitable for applications in corrosive environments such as offshore, chemical, and petrochemical industries.
  • Mechanical Strength: Duplex stainless steel possesses high mechanical strength, allowing duplex ball valves to handle high-pressure and high-temperature applications. They can withstand demanding operating conditions and provide long-term reliability.
  • Resistance to Chloride Stress Corrosion Cracking: Duplex stainless steel has excellent resistance to chloride-induced stress corrosion cracking, which is a common concern in chloride-rich environments. This makes duplex ball valves ideal for applications where exposure to chlorides is expected, such as seawater or brine systems.
  • Wide Temperature Range: Duplex ball valves can operate effectively across a wide temperature range, providing versatility for various industrial applications. They are capable of handling both low and high-temperature fluids, making them suitable for diverse operating conditions.
  • Improved Flow Characteristics: The design of a duplex ball valve allows for a full port, which means that the bore of the ball matches the pipe diameter, resulting in minimal flow restrictions. This feature enhances the flow characteristics, reducing pressure drop and ensuring efficient fluid transportation.
  • Bi-Directional Flow: Duplex ball valves are typically designed to allow bi-directional flow, providing flexibility in system configurations. This means that the valve can effectively control the flow of fluid regardless of the flow direction, offering convenience during installation and operation.
  • Easy Operation: Duplex ball valves feature a simple quarter-turn operation. By rotating the ball 90 degrees, the valve can quickly and easily change from fully open to fully closed positions. This ease of operation allows for efficient flow control and minimizes the time required for valve actuation.
  • Low Maintenance Requirements: Due to their corrosion resistance and robust construction, duplex ball valves require minimal maintenance. Their durable materials and design help to reduce the risk of leaks and ensure long-term reliability, contributing to cost savings and operational efficiency.


  • Oil and Gas Industry: Duplex ball valves are extensively used in the oil and gas industry, particularly in upstream, midstream, and downstream operations. They are suitable for applications such as offshore platforms, oil refineries, gas processing plants, and pipelines. Duplex ball valves can handle corrosive fluids, including hydrocarbons, seawater, and sour gas, making them ideal for these demanding environments.
  • Chemical Processing: Duplex ball valves find applications in chemical processing plants where resistance to corrosive chemicals and high-pressure conditions is crucial. They are used for controlling the flow of various aggressive chemicals, acids, solvents, and corrosive gases.
  • Petrochemical Industry: In the petrochemical industry, duplex ball valves are employed in processes such as polymer production, chemical synthesis, and catalyst handling. They offer excellent resistance to corrosive substances and can handle high-pressure and high-temperature conditions.
  • Water and Wastewater Treatment: Duplex ball valves are used in water and wastewater treatment plants for controlling the flow of water, chemicals, and effluent. They can withstand the corrosive effects of chemicals and saline environments commonly encountered in water treatment processes.
  • Marine and Offshore Applications: Duplex ball valves are widely utilized in marine and offshore applications due to their corrosion resistance in saltwater environments. They are employed in seawater cooling systems, ballast systems, offshore platforms, and shipboard systems.
  • Power Generation: Duplex ball valves are used in power plants for controlling the flow of steam, feedwater, and various chemicals. They are suitable for high-pressure and high-temperature conditions found in power generation processes, including boilers, turbines, and condensers.
  • Mining and Mineral Processing: Duplex ball valves find applications in the mining and mineral processing industry, where they are used for controlling the flow of slurry, corrosive chemicals, and process fluids. They provide excellent resistance to abrasive media and corrosive environments.


  • Body: Duplex 1B, Alloy 20,Super Duplex, Hastelloy C276/B3, Inconel, F347, F44, F317L, F321, Titanium, Monel
  • Ball: SS304, SS316
  • End Cap: CF8, CF8M
  • Bolting: A193-B8
  • Ball Seat: PTFE
  • Packing: PTFE
  • Stem: SS304, SS316
  • Gland: SS304
  • Handle: SS304
  • Nut: A193-B8
  • Nominal Size: DN6 to DN100