Industrial, offshore, marine, mining and chemical-processing systems require valves capable of handling highly corrosive fluids, seawater, chlorides and demanding pressure conditions. African Valve, a Super Duplex Valves Manufacturer in South Africa, provides Super Duplex stainless steel valves designed for reliable isolation and flow control in severe-service applications. Super Duplex grades such as UNS S32750/F53 and UNS S32760/F55 combine high mechanical strength with excellent resistance to pitting, crevice corrosion and chloride stress-corrosion cracking.
Super Duplex Valves Features
Excellent corrosion resistance - Suitable for aggressive chemical and marine environments.
Superior chloride resistance - Provides strong resistance to chloride-induced corrosion.
High pitting resistance - Suitable for seawater, brine and other chloride-containing services.
High mechanical strength - Allows reliable operation under demanding pressure conditions.
Excellent seawater performance - Suitable for desalination, offshore and marine applications.
Resistance to stress-corrosion cracking - Supports reliable service in chloride-containing environments.
Good erosion and wear resistance - Suitable for demanding industrial process systems.
Reliable shut-off - Provides dependable pipeline isolation.
Multiple grade options - Available in F53, F55 and other Super Duplex grades.
Actuation options - Available with manual, gearbox, pneumatic, electric or hydraulic operation depending on valve design.
Technical Specifications
Parameter | Specification |
Valve Type | Super Duplex Gate / Globe / Ball / Check / Butterfly / Plug Valve |
Material Grade | Super Duplex 2507 / UNS S32750 / UNS S32760 |
Forged Material | ASTM A182 F53 / F55 |
Cast Material | ASTM A995 Grade 5A / 6A |
Application | Oil & Gas / Marine / Chemical / Mining / Desalination / Process Piping |
Size Range | Typically DN15 to DN600 or larger, depending on valve type |
Pressure Rating | Class 150 / 300 / 600 / 900 / 1500 / 2500 or PN-rated options |
End Connection | Flanged / Threaded / Socket Weld / Butt Weld |
Operation | Handwheel / Lever / Gear Operated / Pneumatic / Electric / Hydraulic |
Flow Direction | Bi-Directional or Uni-Directional, depending on valve design |
Materials & Components
Component | Material Options |
Body | ASTM A182 F53 / F55 or ASTM A995 Grade 5A / 6A |
Bonnet | Super Duplex F53 / F55 |
Disc | Super Duplex F53 / F55 |
Ball | Super Duplex F53 / F55 |
Stem | Super Duplex / Stainless Steel |
Shaft | Super Duplex Stainless Steel |
Seat | PTFE / RPTFE / Graphite / Metal Seat |
Bearing | Super Duplex / Stainless Steel / PTFE-Based Materials |
Gasket | Graphite / PTFE / Spiral Wound |
Packing | Graphite / PTFE-Based Materials |
Applications
- Oil & Gas - Offshore, subsea and process systems
- Desalination - Seawater and brine systems
- Marine - Seawater and marine piping
- Chemical Processing - Corrosive fluid handling
- Mining - Mineral and process-water systems
- Water Treatment - Chloride-containing water systems
- Power Generation - Cooling and utility systems
- Industrial Processing - Corrosive process applications
Testing & Standards
- Design: ASME B16.34, where applicable
- Testing: API 598 / ISO 5208, depending on valve type
- Valve-Specific: API 600 / API 602 / API 594 / API 609 / API 6D / ISO 17292, depending on valve type
- Dimensions & Connections: ASME B16.5 / B16.10 / B16.25, where applicable
Standard Super Duplex Valves Products
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