4th Floor, Survey No. 235/A and 247/A, E/401, Nr. Bhattha School, Gyaspur, Ahmedabad 382405, Gujarat, India
Branch Office: Mehta House, Relief Road, Ahmedabad 380001
Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Extended Bonnet Full-Port Isolation Valve for Ultra-Low Temperature Service
This datasheet covers flexible wedge cryogenic gate valves with extended bonnet for bidirectional isolation in LNG, LPG, and liquid nitrogen systems. Full-port design allows pigging and inspection tool passage.
| Parameter | Specification |
|---|---|
| Valve Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | PN40 / Class 150 / Class 300 / Class 600 |
| Body Material | CF8M (SS316) low-temp Charpy-tested at -196°C |
| Wedge Material | CF8M (SS316) flexible wedge with central hub for seat alignment |
| Seat Material | SS316 integral or overlay, optional PTFE insert for bubble-tight |
| Bonnet Extension | 200 mm to 500 mm per BS 6364 and operator size |
| Temperature Range | -196°C to +120°C |
| End Connections | Flanged ASME B16.5, butt weld ASME B16.25 |
| Operation | Handwheel, gear operator, or motorised actuator |
| Features | Full port, flexible wedge, extended bonnet, position indicator |
| Component | Material |
|---|---|
| Body | CF8M (SS316), solution annealed, Charpy impact tested at -196°C |
| Bonnet | CF8M (SS316), extended neck with position indicator boss |
| Wedge | CF8M (SS316) one-piece flexible wedge with centre hub for automatic seat alignment under differential pressure |
| Seat | Integral SS316 with optional Stellite 6 overlay; PTFE insert on request |
| Stem | SS316, rising stem with ACME threads, handwheel nut with thrust bearing |
| Packing | Graphite braided rings with anti-extrusion end rings, live-loading optional |
| Gaskets | Spiral-wound SS316 + graphite for body/bonnet joint |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / ISO 5208 / BS 6364 cold-box test |
| Certification | CE, PED, ISO 9001 |
| Standard | Description |
|---|---|
| Design Standard | BS 6364 / API 600 / ASME B16.34 |
The Cryogenic Gate Valve -- Flexible Wedge 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.