Specifications
| Parameter | Specification |
|---|---|
| Series | SICCA 1500/2500/4500 GLF |
| Body Material | A182 F22 (2.25Cr-1Mo) / A182 F91 (9Cr-1Mo-V) |
| Pressure Class | Class 1500, 2500, 4500 |
| Size Range | NPS ¼–2 (DN 8–DN 50) |
| Max Temperature | 650°C (1200°F) with F91 |
| Max Pressure | 776 bar (11,251 psi) at Class 4500 F22 |
| Design Standard | API 602 (Class 1500), ASME B16.34 (Class 2500/4500) |
| End Connections | Socket Weld (ASME B16.11), Butt Weld (ASME B16.25) |
| Bonnet Design | Seal-welded body/bonnet joint |
| Trim | Stellite 6 hard-faced seat and disc; XM19 stem for high-temperature service |
| IBR Certified | Check with KSB |
Material & Applications
Why Alloy Steel F22/F91: F22 (2.25Cr-1Mo) is the workhorse alloy for high-temperature forged valves, with excellent creep resistance up to 593°C. F91 (9Cr-1Mo-V, modified) extends the temperature limit to 650°C and is specified for advanced power plant cycles where F22 reaches its creep limit. F91 also offers better thermal fatigue resistance during cycling.
Typical applications: Power plant main steam (HP), hot reheat (IP), boiler drain, and high-temperature instrument connections in supercritical and ultra-supercritical cycles. F22 for conventional high-temperature service. F91 for advanced high-efficiency power plants operating above 593°C.
Pressure/Temperature Ratings
Permissible operating pressures per ASME B16.34:
| Rating | Permissible Operating Pressure at Temperature | |||
|---|---|---|---|---|
| F22 — 1500 | -29 to 38°C: 259 bar | 316°C: 209 bar | 427°C: 175 bar | 593°C: 38 bar |
| F22 — 2500 | -29 to 38°C: 431 bar | 316°C: 348 bar | 427°C: 292 bar | 593°C: 63 bar |
| F22 — 4500 | -29 to 38°C: 776 bar | 316°C: 626 bar | 427°C: 525 bar | 593°C: 113 bar |
| F91 — 1500 | -29 to 38°C: 259 bar | 316°C: 209 bar | 538°C: 125 bar | 650°C: 50 bar |
| F91 — 2500 | -29 to 38°C: 431 bar | 316°C: 347 bar | 538°C: 209 bar | 650°C: 83 bar |
| F91 — 4500 | -29 to 38°C: 776 bar | 316°C: 625 bar | 538°C: 376 bar | 650°C: 149 bar |