16″ 1500LB F91 Parallel Slide Gate Valve

Description

F91 Parallel Slide Gate Valve

1. Valve Type: Parallel Slide Gate Valve (Double Disc Non-Wedging)

2. Design Standard: API 600 / ASME B16.34

3. Size: 16 Inch (NPS 16)

4. Pressure Class: ASME Class 1500 (1500 LB)

5. Body & Bonnet Material: ASTM A182 F91 (9Cr-1Mo-V Forged Steel)

6. Bonnet Type: Pressure Seal (Self-Sealing) Bonnet

7. End Connection: Butt Weld (BW) per ASME B16.25

8. Seating Surfaces:

   • Seat Rings: Full Stellite 6 Overlay (Min. 3mm)

   • Gate Plates: Stellite 6 Hardfaced Contact Surfaces

9. Stem Material: ASTM A182 F6a (Surface Nitrided HRC≥40)

10. Stem Type: Rising Stem (OS&Y) with Anti-Blowout Design

11. Packing: Flexible Graphite Rings (Fire-Safe per API 607)

12. Gasket: Pressure Seal Ring (Inconel 600 RTJ Type)

13. Sealing Mechanism:

    • Spring-Loaded Parallel Discs for Thermal Expansion Compensation

    • Metal-to-Metal Seal (Stellite-on-Stellite)

14. Operation: Hydraulic/Electric Actuator Ready (ISO 5211 Pad)

15. Face-to-Face: ASME B16.10 Class 1500

16. Testing & Certification:

    • API 598: Shell Test @ 3750 psi | Seat Test Class IV

    • PED 2014/68/EU | ISO 10434 Compliant

17. Leakage Class: API 598 Class IV (Gas Test)

18. Temperature Range: -29°C to 593°C (-20°F to 1100°F)

19. Application:

    • Critical Service: Main Steam Isolation, Boiler Outlet Lines

    • System Pressure: ≤ 2500 psig @ 565°C

    • Plant Type: Supercritical (SC) & Ultra-Supercritical (USC) Power Units