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Zero-Emission Cryogenic Throttling Valve with Bellows Stem Seal
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.
| 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 |
| 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 |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / ISO 5208 / BS 6364 cold-box test |
| Certification | CE, PED, ISO 15848-1 Class BH (bellows tightness) |
| Standard | Description |
|---|---|
| Design Standard | BS 6364 / ISO 28921-1 / ASME B16.34 |
The Cryogenic Globe Valve -- Bellows Seal LNG Steam Jacket is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.