Duplex Steel Ball Valves
Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex 2205 | 1.4462 | S31803 / S32205 |
Chemical Properties
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
Duplex Steel Ball Valves Specification
| Specification | Details |
|---|---|
| Standards | ASTM A995, ASTM A240, API 598, ISO 9001 |
| Pressure Rating | ANSI Class 150, 300, 600, 900 (up to 6000 psi depending on size and design) |
| Size Range | 1/2" to 12" (DN 15 to DN 300) |
| Temperature Rating | -50°F to 400°F (-45°C to 204°C) for standard, higher ratings available depending on design |
| Connections | Threaded (NPT, BSP), Flanged (RF, FF), Socket weld, Butt weld |
| Material | Duplex Steel S31803, S32205, or other duplex alloys depending on application |
| Standard Compliance | ASME B16.34, MSS SP-72, API 6D |
| Design Features | – Full port or reduced port designs – Blow-out proof stem – Floating or trunnion-mounted ball – Manual or automated operation options – Live-loaded packing (for leakage prevention) – Anti-static design (for safety in flammable applications) |
