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Technical Datasheet -- Cryogenic Ball Valves for LNG and Liquid Gas Service
Cryogenic ball valves for liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, and other cryogenic fluid service. Extended bonnet design positions the packing gland above the frost line, preventing ice formation and seal failure. SS316 body with cryogenic-grade PTFE/RPTFE seats tested for flexibility at -196 deg C. Compliant with BS 6364 and API 6D.
| Parameter | Specification |
|---|---|
| Product Type | Cryogenic Ball Valves |
| Category | Ball Valves |
| Size Range | 1/2" to 12" (DN15 to DN300) |
| Pressure Class | Class 150 / Class 300 / Class 600 per ASME B16.5 |
| End Connections | RF / RTJ flanged per ASME B16.5 or butt-weld per ASME B16.25 |
| Body Material | ASTM A351 CF8M (SS316) / ASTM A352 LCC (low-temperature carbon steel) |
| Ball Material | SS316 with ENP or chrome plating |
| Seat Material | Cryogenic PTFE / RPTFE / UHMWPE (retains flexibility at -196 deg C) |
| Stem Material | SS316 with extended bonnet design |
| Bonnet Extension | Extended neck bonnet positions packing gland above the frost line, preventing ice formation on stem seal |
| Temperature Range | -196 deg C to +80 deg C (LNG / liquid nitrogen) -- up to +200 deg C with standard seats |
| Leakage Class | BS 6364 / API 598 -- zero visible external leakage; seat leakage Class A |
| Operation | Extended stem lever with cryogenic glove / Gear operator / Actuator with extended stem coupling |
| Component | Material |
|---|---|
| Stainless Steel | ASTM A351 CF8M (SS316), CF3M (SS316L) -- austenitic SS retains ductility at cryogenic temperatures |
| Low-Temp Carbon Steel | ASTM A352 LCC, A350 LF2 (down to -46 deg C) |
| Seats | Cryogenic-grade PTFE, RPTFE, UHMWPE (tested for flexibility at -196 deg C) |
| Packing | Graphite braided with live-loading (compatible with cryogenic to ambient cycling) |
| Test | Requirement |
|---|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque verification; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
| Standard | Description |
|---|---|
| Design Standard | API 6D / API 608, BS 6364 Cryogenic Valves, ISO 17292 |
The Cryogenic Ball Valve -- SS316 Extended Bonnet LNG 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.