Cryogenic Globe Valve -- Bellows Seal LNG Steam Jacket
Zero-Emission Cryogenic Throttling Valve with Bellows Stem Seal
Document No.SV-DS-CRY-002
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet describes bellows-sealed cryogenic globe valves with extended bonnet and optional steam jacket for zero-emission throttling and isolation in LNG, liquid oxygen, and research cryogenic systems.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN15 to DN150 (1/2" to 6") |
| Pressure Rating | PN40 / Class 150 / Class 300 / Class 600 |
| Body Material | CF8M (SS316), CF3M (SS316L), low-temp Charpy tested |
| Plug / Seat Material | SS316 + Stellite 6, 17-4PH, PCTFE soft seat optional |
| Bellows Material | SS316L multi-ply hydroformed bellows, 10,000+ cycle life |
| Bonnet Extension | 150 mm to 350 mm per BS 6364 |
| Temperature Range | -196°C to +200°C (bellows limit) |
| End Connections | Flanged ASME B16.5, butt weld, socket weld |
| Leakage Class | ANSI/FCI 70-2 Class IV (metal seat), Class VI (soft seat) |
| Steam Jacket | Optional 1/2" NPT jacket connections for steam or hot oil tracing |
Materials of Construction
| Component | Material |
|---|
| Body | CF8M (SS316) or CF3M (SS316L), solution annealed, cryogenic Charpy tested |
| Bellows | SS316L multi-ply, 0.15 mm plies, fatigue-tested to 50,000 cycles |
| Plug | SS316 with Stellite 6 hard facing; characterised plug for equal-percentage flow |
| Seat | Replaceable screwed SS316 seat ring; PCTFE insert for Class VI shutoff |
| Stem | SS316, guided by upper and lower bearings, welded to bellows at top |
| Gland Backup | Graphite packing below bellows as secondary seal in case of bellows failure |
| Steam Jacket | SS304 half-pipe welded to body and bonnet with 1/2" NPT connections |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 / BS 6364 cold-box test |
| Certification | CE, PED, ISO 15848-1 Class BH (bellows tightness) |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | BS 6364 / ISO 28921-1 / ASME B16.34 |
Notes
- Bellows stroke must not exceed 80% of total available elastic travel to ensure 20,000+ cycle life; specify actual stroke at order.
- Steam jacket supply pressure must not exceed 6 bar g; drain connection must be at lowest point to prevent condensate pooling.
- Bellows valves are one-way; flow direction arrow cast on body must match actual process flow to prevent bellows deformation.
- For oxygen service, all hydrocarbon traces must be removed to ASTM G93 Level 300 and valve marked accordingly.
- ISO 15848-1 Class BH fugitive-emission test certificate available on request for environmental compliance.
