Cryogenic Valve (Extended Bonnet)
Extended-bonnet gate, globe, ball or butterfly for LNG and low-temperature service
Cryogenic valve program supplied from qualified manufacturers for LNG, ethane, ethylene and other low-temperature services down to −196 °C. An extended bonnet keeps the stem packing away from the cold box, following BS 6364 / ISO 28921 practice. Gate, globe, ball and butterfly types are offered in stainless and nickel-alloy materials, with drip plates and orientation to the cold-box layout. ISO 15848 packing and fire-safe construction are available on request.
Products are supplied to the stated API / ISO / ASME / AWWA standards from qualified manufacturers for projects in Saudi Arabia, including Dammam, Jubail, Yanbu, Riyadh, Jeddah and the Eastern Province. Certifications, monograms and listings are those of the manufacturing plant and are provided as specified in the purchase order.
Technical specifications
| Figure number | IV-CRY1 |
|---|---|
| Size range | ½″ – 24″ (DN15 – DN600), larger sizes on request |
| Pressure rating | ASME Class 150 – 1500 |
| End connections | RF / RTJ flanged or butt-weld |
| Typical materials | Body: ASTM A351 CF8M / CF3M, A352 LC3 / LCC, A182 F316; extended bonnet and stem in matching stainless |
| Design standards | ASME B16.34 · BS 6364 · ISO 28921 · API 600 / 602 / 608 / 609 as applicable |
| Certifications (per manufacturer) | API 598 production tests · Fire-safe API 607 (as available) · ISO 15848 on request |
Key features
- Extended bonnet to BS 6364 / ISO 28921 practice
- Gate, globe, ball or butterfly construction as specified
- Service temperatures down to −196 °C
- Stainless and nickel-alloy body and trim
- Gas type-testing and cavity-pressure relief as specified
- ISO 15848 low-emission packing available on request
