LNG & Cryogenic Application Solutions
VALVA delivers high-integrity flow control solutions for the rapidly expanding Liquefied Natural Gas (LNG) and cryogenic sectors. Operating at temperatures as low as -196°C (-320°F), our valves are engineered to handle the unique thermal contraction and sealing challenges of liquefied gases, ensuring safety and efficiency from liquefaction plants to transport and regasification terminals.
Mastering the Science of Extreme Cold
Cryogenic service demands more than just standard engineering. VALVA addresses these specialized requirements through:
- Extended Bonnet Design: Moving the stem packing away from the cryogenic fluid to prevent freezing and ensure operational integrity.
- Thermal Contraction Management: Utilizing materials and tolerances that account for the significant shrinkage of components at sub-zero temperatures.
- Cavity Pressure Relief: Specialized ball and gate valve designs that prevent dangerous pressure buildup caused by the expansion of trapped liquefied gas.
- Low-Emission Sealing: Advanced lip-seal and graphite technologies to prevent fugitive emissions in volatile gas environments.
Comprehensive Solutions for the LNG Value Chain
We support critical infrastructure across the entire cryogenic lifecycle:
- Liquefaction Plants: High-performance valves for gas pretreatment and the core cooling process.
- LNG Storage & Terminals: Robust isolation valves for large-scale cryogenic tanks and piping manifolds.
- Marine Transport: Specialized valves for LNG carriers and bunkering vessels, designed for high-vibration and saline environments.
- Regasification Facilities: Reliable flow control for converting LNG back into its gaseous state for distribution.
- Industrial Gases: Solutions for liquid oxygen ($LOX$), liquid nitrogen ($LIN$), and liquid hydrogen ($LH_2$) applications.
Cryogenic Grade Metallurgy
Standard carbon steel becomes brittle like glass in cryogenic temperatures. We use only specialized, impact-tested alloys:
| Component | Recommended Material | Why it Works |
| Main Body | Stainless Steel 316L / 304L | Maintains excellent ductility and toughness at -196°C. |
| High-Pressure Trim | Inconel 625 / 718 | Exceptional strength and thermal stability in ultra-cold service. |
| Cast Components | ASTM A351 CF8M / CF3M | Optimized for low-temperature impact strength. |
| Soft Seats | PCTFE (Kel-F) / Reinforced PTFE | Maintains flexibility and sealing performance where other plastics fail. |
Rigorous Testing & Safety Standards
In the LNG industry, “Standard” is never enough. Every VALVA cryogenic valve undergoes:
- Cryogenic Testing: Low-temperature leakage testing in liquid nitrogen tanks per BS 6364 or ISO 28921.
- Fire Safety: Certified fire-safe designs (API 607) to ensure containment during emergency scenarios.
- Cleanliness Protocols: Specialized cleaning and degreasing to remove hydrocarbons (essential for liquid oxygen service).
- Compliance: Fully compliant with ASME B16.34, API 600, API 608, and BS 6364.