High-Temperature Triple Offset Butterfly Valve
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High-Temperature Triple Offset Butterfly Valve

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Description

High-Temperature Triple Offset Butterfly Valve

  1. Valve Type: Triple Eccentric Butterfly Valve (Metal-Seated, Zero Friction Design)

  2. Design Standard: API 609 / ISO 17292

  3. Size: 14″ (DN 350)

  4. Pressure Class: ASME Class 150 (150 LB)

  5. End Connection: RF Flange per ASME B16.5 (Raised Face: 1/16″)

  6. Body & Disc Material: ASTM A217 C5 (5% Cr-0.5% Mo Cast Steel for ≤593°C)

  7. Seat System:

    • Laterally Replaceable Seat Ring

    • Sealing Face: Stellite 6 Overlay (3mm Min, HRC 46-52)

    • Graphite Pressure-Activated Backup Gasket

  8. Disc Seal: Laminated Structure:

    • Inconel 625 Carrier + Flexible Graphite Layer (API 607 Fire-Safe)

  9. Stem: Extended High-Temp Stem (17-4PH H1150, Plasma Nitrided ≥0.1mm)

  10. Sealing Performance: ISO 5208 Rate A (Bubble-Tight) @ 593°C

  11. Temperature Range: -29°C to 593°C (Continuous Operation)

  12. Critical Features:

    • Side-Loaded Seat Replacement (2-Bolt Removal, ≤1.5 Hours)

    • Live-Loaded Stem Packing (ISO 15848-1 Class BH)

    • Conical Disc Offset: 8° Angle (Guarantees Zero Wear)

  13. Power Plant Applications:

    • Boiler Bypass Ducts: 565°C Flue Gas Isolation

    • Hot Reheat Lines: 540°C @ 4.2MPa Steam

    • SCR/SNCR Systems: Abrasion-Resistant Sealing for Ash-Laden Gas

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