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Extended Bonnet Cryogenic Isolation Valve for Ultra-Low Temperature Service
This datasheet covers top-entry full-bore cryogenic ball valves with extended bonnet and stem for LNG, LPG, liquid oxygen, and nitrogen service down to -196°C.
| Parameter | Specification |
|---|---|
| Valve Size Range | DN15 to DN200 (1/2" to 8") |
| Pressure Rating | PN40 / Class 150 / Class 300 / Class 600 |
| Body Material | CF8M (SS316) low-temperature Charpy-tested at -196°C |
| Ball / Seat Material | SS316 / PTFE, PCTFE (Kel-F), PEEK cryogenic grade |
| Bonnet Extension | 150 mm to 400 mm per BS 6364 / ISO 28921-1 |
| Temperature Range | -196°C to +120°C |
| End Connections | Flanged ASME B16.5, butt weld ASME B16.25, socket weld |
| Anti-Static | Spring-loaded ball-to-stem and stem-to-body electrical continuity |
| Fire-Safe | API 607 6th Edition fire-safe certified seat design |
| Component | Material |
|---|---|
| Body | CF8M (SS316) investment casting, solution annealed, Charpy tested at -196°C |
| Ball | SS316 solid ball, lapped to mirror finish, bore matches pipe ID |
| Seat | PTFE or PCTFE (Kel-F) cryogenic grade; PEEK for higher differential pressure |
| Stem | SS316, extended to position packing above vapour zone; anti-blow-out |
| Packing | Graphite + PTFE V-ring set with live-loading spring for thermal contraction compensation |
| Gaskets | Spiral-wound SS316 + graphite for body/bonnet joint |
| Bolting | SS316 A4-80 or B8M class 2 for low-temperature ductility |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / ISO 5208 / BS 6364 cold-box testing |
| Certification | CE, PED, ATEX, ISO 9001 |
| Cryogenic Test | Helium leak test at -196°C in vacuum chamber |
| Standard | Description |
|---|---|
| Design Standard | BS 6364 / ISO 28921-1 / API 6D / ASME B16.34 |
The Cryogenic Ball Valve -- Top Entry LNG / LPG SS316 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.