Description
Materials and Min Temperature Ratings
| Forged Material | Min Temp | Cast Material | Min Temp |
| ASTM A182 F316 / F304 | –254°C | ASTM A351 CF8M / CF3M | –254°C |
| ASTM A350 LF3 | –101°C | ASTM A352 LC3 | –101°C |
| ASTM A350 LF2 | –46°C | ASTM A352 LCB / LCC | –46°C |
Test & Quality Control
| Test Name | Conditions |
| Initial Proving Test | 1.1 × MDP @ Room Temperature, Helium |
| Torque Cycle Test | 20 open-close cycles |
| Seat Closure Leak Test | 1.1 × MDP @ –196°C, Helium |
| Shell Leak Test | 15 minutes @ –196°C, Helium |
| Restoration Test | Post cryo retesting at Room Temp |
✔ Conducted according to BS 6364, ISO 28921, and API 598
Construction Features – Ball & DBB Valves
- Extended Bonnet:
Positions gland packing away from cryogenic zone
Cavity Pressure Relief Options:
- Upstream port relief hole (unidirectional)
- Relief valve fitting (bidirectional)
- Self-relieving seat
Locking Devices: Padlock system for both manual and gear-operated valves
Actuation Options: Electric, pneumatic, hydraulic
- Seat Options:
- Soft Seat for –196°C
- Metal Seat for up to 850°C
- Soft Seat for –196°C
Specifications – Ball Valves
| Feature | Details |
| Valve Size | 1/2” to 14” (Top entry & 3-piece) |
| Pressure Rating | ASME 150–2500 |
| Temp Rating | –196°C |
| End Connections | Butt Weld, Flanged, SW, Threaded |
| Design | Floating / Trunnion, DBB |
| Standards | ASME B16.10, B16.5, B16.25, B16.11 |
| Test Standards | BS 6364, API 598, ISO 28921 |
| Wall Thickness | ASME B16.34 |
Materials of Construction – Ball Valve
| Component | Material |
| Body, Bonnet, Ball | ASTM A351 CF8M |
| Stem | ASTM A276-316 |
| Seat | PCTFE |
| Spring | Inconel X-750 |
| Gasket | Graphite + SS316 |
| Packing | Graphite |
| Bolts/Nuts | ASTM A320-B8 / A194-8 |
