Super Duplex (2507 / UNS S32750 / S32760 / GR. 5A & 6A) Butterfly Valves

Falcon High-Performance Super Duplex (2507 / UNS S32750 / S32760 / Gr. 5A & 6A) Butterfly Valves

At Falcon, we engineer and manufacture industrial-grade Super Duplex Butterfly Valves designed for zero-leakage isolation, high-velocity flow control, and maximum corrosion resistance in the world’s most hyper-aggressive chemical, subsea, and offshore process environments. Cast in high-purity ASTM A890 / A995 Grade 5A (UNS J93404 / CE3MN) and Grade 6A (UNS J93380 / CD3MWCuN) and forged from ASTM A182 F53 / F55, our Super Duplex valves deliver an extreme (PREN≥40–45) alongside double the mechanical strength of standard austenitic 316L and Duplex 2205 alloys.

Why Choose Falcon Super Duplex (2507 / 5A / 6A)?

• Extreme Pitting & Crevice Corrosion Resistance: High Pitting Resistance Equivalent Number (PREN≥40–45) provides total immunity to localized pitting, crevice corrosion, and micro-fouling in hot seawater, high-pressure brine, and concentrated acids.

• Superior Mechanical Yield Strength: Yield strength exceeding $550\text{ MPa}$ allows for lightweight, high-integrity pressure casings capable of enduring extreme line pressure, thermal shock, and severe water hammer.

• Total Stress-Corrosion Cracking Immunity: Balanced 50/50 austenitic-ferritic microstructure guarantees 100% protection against chloride-induced stress corrosion cracking (SCC) in elevated temperature processes up to +300 ∘ C

• Outstanding Erosion-Corrosion Resistance: Superior surface hardness and matrix density resist high-velocity erosion and seat scouring caused by abrasive mineral slurries, sand, and particulate-laden process streams.

• Bi-Directional Zero-Leakage Seating: Precision-engineered offset disc options paired with high-performance elastomeric, fluoropolymer, or metal-to-metal seating deliver certified ISO 5208 Rate A / API 598 bubble-tight shut-off.

Valve Configurations Offered

• Concentric PTFE / PFA-Lined Super Duplex Butterfly Valves:

  • Design: Fully encapsulated disc and body liner geometry for total fluid isolation.

  • Best For: Ultra-pure chemical lines, aggressive acid feeds, and active halide transfer systems.

• Double-Offset (High Performance) Super Duplex Butterfly Valves:

  • Design: Double eccentric shaft displacement lifts the disc off the seat during quarter-turn rotation, eliminating seat wear and lowering operating torque.

  • Best For: High-cycle throttling, high-pressure reverse osmosis feed lines, and medium-pressure offshore topsides.

• Triple-Offset (Bi-Directional Zero-Leakage) Super Duplex Butterfly Valves:

  • Design: Frictionless metal-to-metal seating geometry with a laminated Super Duplex / graphite seal ring for absolute bubble-tight shut-off.

  • Best For: High-temperature hydrocarbon processing, firewater deluge loops, sour gas handling, and abrasive slurry lines.

Primary Applications

• Desalination & Reverse Osmosis (RO): Ultra-high-pressure RO feed pumps, energy recovery turbine isolation, and concentrated brine reject lines.

• Offshore Oil & Gas (FPSO & Platforms): Subsea manifolds, topside seawater injection, produced water treatment skids, and firewater deluge systems.

• Chemical & Petrochemical Processing: Handling concentrated hot organic and inorganic acids, acidic chloride solutions, and vinyl chloride monomer (VCM) units.

• Hydrometallurgy & Mining: High-pressure acid leaching (HPAL) systems, mine dewatering, and abrasive mineral slurry transfer.

• Pulp & Paper Bleach Plants: Chlorine dioxide ClO2 feed lines, digesters, and liquor recovery loops.

Quality Assurance & Testing Standards

Every Falcon Super Duplex Butterfly Valve undergoes exhaustive metallurgical and non-destructive testing before release:

• 100% Positive Material Identification (PMI) 

• Microstructure & Ferrite Content Checks
• Pitting Corrosion Testing
• Hydrostatic Shell & Bi-Directional Seat Testing
• EN 10204 Type 3.1 & Type 3.2 Material Test Reports (MTRs) for full heat traceability

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