Cryogenic Ball Valve

Product Name: Cryogenic Ball Valve
Design Standard: API 6D
Body Material: Low Temperature Carbon Steel ASTM A350 LF2
Size: 14 Inch, DN350
Pressure: Class 900 LB, PN150
End Connection: RTJ Flanged End
Operation: Gear Box

Cryogenic ball valves are specifically designed for extremely low-temperature and cryogenic applications. These valves feature an integral bonnet extension that prevents cryogenic liquids from reaching the stem packing by allowing the liquids to boil and convert to gas. This design minimizes energy loss along the extension and helps protect the valve from malfunction. The valve’s structural integrity minimizes thermal deformation of internal components caused by temperature variations, ensuring optimal performance and reliable tight shut-off in critical LNG applications.

Technical Specification

» Product Name: Cryogenic Ball Valve
» Size Range: NPS 1-30 Inch (DN25-DN750)
» Design Pressure: Class 150-900 LB (PN10-PN160)
» Materials: Low-Temperature Carbon Steel, Stainless Steel, Duplex, Super Duplex, Inconel
» End Connections: RF, RTJ as per ASME B16.5 & B16.47; BW, Butt Welded per ASME B16.25
» Temperature Range: -320°F to 212°F (-196°C to 120°C)
» Manual Operation: Wrench or gear with padlocking
» Actuation: Pneumatic, Hydraulic, or Electric

Product Features

» Forged bolted two-piece and three-piece designs
» Secondary seals made of pure graphite
» Anti-static device
» Anti-blowout stem
» Lip seal configuration
» Low fugitive emission stem packing available
» Extended bonnet for low-temperature and cryogenic service
» Soft or metal seated with hard-facing on the ball and seats
» Seat design to prevent trapped fluid in the body cavity

Testing & Certifications

» Compliance with BS 6364, MESC 77/200, ISO 28921‐1 for inspection and testing
» Fire-safe and fire-tested as per API 6FA/607
» SIL 3 Certification according to IEC 61508
» Fugitive Emissions compliant with ISO 15848