YYF Industrial Valves: Full-Scene Cryogenic Fluid Control Solutions for LNG & Cryogenics

I. Core Valve Types for LNG & Cryogenics: Tailored Solutions for Extreme Cold

1. Cryogenic Ball Valves – Rapid Shutoff Experts for Deep Cold

• Technical Advantages:
  • Balls and seats undergo deep cryogenic treatment (-196℃ for 24 hours), enhancing impact toughness by 30% with no intergranular corrosion at -200℃;
  • Metal+PTFE dual-seal achieves Class VI bubble-tight sealing (leakage ≤5×10⁻⁹ m³/s), compliant with API 6D cryogenic testing;
  • Anti-static springs eliminate electrostatic risks from high-speed cryogenic fluids, preventing explosions in flammable media like LNG and hydrogen.
• Applications: LNG ship unloading arm connections, tank emergency shutdown systems, 70MPa hydrogen storage tanks—ideal for fast-switching in DN15-DN500.

2. Cryogenic Gate Valves – Sealing Benchmark for Large-Diameter Cryogenic Pipelines

• Technical Advantages:
  • Anti-brittleness design maintains ≥95% tensile strength at -196℃, complying with ASME BPVC Section VIII-2 cryogenic material standards;
  • Long-neck bonnets (≥200mm) isolate external heat, reducing stem cold loss by 30% and preventing ice formation;
  • Self-cleaning seals prevent freeze-up from trace moisture in cryogenic natural gas.
• Applications: LNG terminal vaporizer main pipelines (DN600-DN1200), liquid nitrogen/oxygen tank outlets, air separation main cold boxes—suitable for low-frequency, high-sealing large diameters.

3. Cryogenic Check Valves – Backflow Prevention in Cryogenic Systems

• Technical Advantages:
  • Swing discs with PTFE buffers remain flexible at -162℃, responding in <0.2 seconds;
  • Matched lapping of seat and disc ensures sealing roughness ≤Ra0.2μm for zero leakage;
  • Guide vanes reduce flow resistance, enabling activation at 0.02MPa for low-head cryogenic pumps.
• Applications: LNG pump outlets, air separation expander inlets, hydrogen fuel cell supply lines—critical for media with cryogenic condensate.

4. Cryogenic Butterfly Valves – Efficient Large-Diameter Regulation in Cold Environments

• Technical Advantages:
  • PTFE cryogenic coating on discs reduces friction to ≤0.1 at -200℃, cutting operating torque by 40%;
  • Lug-type bodies save 30% installation space, with pneumatic actuators responding in <1 second for LNG ship emergency release systems (ERS);
  • Fire-safe structure complies with API 607, maintaining sealing integrity for 10 minutes under fire conditions.
• Applications: LNG tank vapor balance lines (DN800+), air separation nitrogen venting networks, hydrogen refueling pre-cooling loops—suitable for large-flow regulation.

5. Cryogenic Safety Relief Valves – Final Barrier for Overpressure Protection

• Technical Advantages:
  • ±1% reseating accuracy minimizes cryogenic media (LNG, liquid nitrogen) evaporation;
  • Fully austenitic stainless steel springs and internals extend fatigue life by 50% at -196℃, compliant with ASME BPVC Section I;
  • Counterflow disc design reduces opening pressure deviation for boil-off gas (BOG) systems in LNG tanks.
• Applications: LNG tank overpressure protection, air separation main cold box relief, liquid hydrogen trailer pressure control—meeting strict cryogenic safety codes.

6. Cryogenic Globe Valves – Precision Flow Control in Low Temperatures

• Technical Advantages:
  • Inconel 625 guide sleeves enhance wear resistance by 200% at -200℃;
  • Bellows seal structure (Patent No.: ZL2020XXXXXX) eliminates external leakage for cryogenic toxic media like CO;
  • Smart electric actuators with ±0.5% positioning accuracy support real-time DCS calibration.
• Applications: LNG vaporizer temperature control, air separation oxygen flow regulation, hydrogen liquefaction expansion valves—ideal for precise throttling in DN25-DN300.

7. Cryogenic Diaphragm Valves – Ultimate Protection for Cryogenic Corrosive Media

• Technical Advantages:
  • Dead-leg-free design with residue ≤0.05ml prevents ice formation from residual media, suitable for precise cryogenic dosing;
  • Pneumatic models respond in <0.6 seconds with SIL 3 safety shutdown;
  • FRP bodies reduce weight by 50%, ideal for lightweight installation on offshore LNG platforms.
• Applications: Air separation cryogenic liquid pipelines, hydrogen fuel cell coolant loops, rare gas purification systems—critical for high-purity cryogenic media.

II. YYF’s Core Competencies: Full-Dimensional Innovation for Cryogenics

1. Low-Temperature Material Leadership:
   • Proprietary YYF-Cryo1 superalloy (9%Ni) provides ≥80J impact energy at -196℃, 50% better than standard 304L, solving cold brittleness;
   • Vacuum deep cryogenic treatment improves valve stem hardness uniformity by 25%, leading in low-temperature fatigue resistance.
2. Cryogenic Sealing Technology:
   • Developed “metal bellows + PTFE” composite seals with leakage ≤1×10⁻⁹ mbar·L/s across -269℃ to room temperature cycles;
   • Laser-clad nickel-based alloy coatings on seats/balls enhance cold-state sealing by 30%, eliminating “cold-shrinkage leakage”.
3. Intelligent Maintenance Empowerment:
   • YYF-IoT cryogenic modules monitor temperature, leakage, and cycles in real time via LoRa, reducing unplanned downtime by 40% through predictive maintenance;
   • Digital twin technology simulates valve performance under cold start 冲击 and pressure fluctuations to optimize maintenance strategies.
4. Global Compliance & Certifications:
   • End-to-end traceability from material smelting (blockchain) to Charpy V-notch impact testing;
   • Certifications include CE/PED (Module B+D), ASME BPVC Section VIII-2, and TSG ZF001 for global project compatibility.

III. Addressing Procurement Priorities in LNG & Cryogenics

• Extreme Low-Temperature Reliability: 30% longer lifespan than conventional valves after 1,000 cryogenic cycles, with zero leakage;
• Energy Efficiency & Safety: CFD-optimized flow paths reduce pressure drop by 15%, while fire-safe designs meet the highest international standards (API 6FA);
• Full-Lifecycle Service: 5 global cryogenic spare parts centers ensure 72-hour emergency delivery, with specialized toolkits reducing maintenance time by 50%.

IV. Industry Trends & YYF’s Forward-Looking Initiatives

• Hydrogen Chain Adaptation: Developing 70MPa hydrogen-resistant cryogenic ball valves to solve hydrogen embrittlement and sealing issues;
• LNG Terminal Intelligence: Launching 5G-enabled cryogenic butterfly valves for unmanned terminal digital transformation;
• Material Innovation: Researching graphene-reinforced PTFE seals for -273℃ ultra-cryogenic applications like liquid helium.

V. Partner with YYF for Cryogenic Excellence