Brief Overview of Cryogenic Liquid Argon Breakaway Valves

(Content Translation)
Cryogenic Liquid Argon Breakaway Valves (also termed Emergency Release Couplings for LAr) are safety mechanisms engineered for liquid argon (-186°C) transfer systems. They ensure safe disconnection during emergencies to prevent argon leakage, which poses asphyxiation risks in confined spaces.

Key Characteristics:

1. Function:

   • Automatically severs and seals pipelines when excessive force (e.g., equipment displacement, hose pull) is detected, containing argon release.

2. Design Requirements:

   • Cryogenic Compatibility: Materials (e.g., stainless steel 316L) must resist thermal stress and embrittlement at -186°C.

   • Leak-Tight Seals: Utilizes low-temperature elastomers or metal seals to ensure post-activation closure.

   • Insulation: Often paired with vacuum-insulated lines to minimize heat transfer and external icing.

3. Activation Methods:

   • Mechanical Fracture: Triggers via predefined tensile/bending force thresholds.

   • Manual Override: Optional pull-wire for emergency remote operation.

4. Applications:

   • Liquid argon storage tank loading/unloading.

   • Industrial gas supply chains (e.g., welding, electronics manufacturing).

   • Cryogenic transport between facilities.

5. Standards Compliance:

   • Adheres to ISO 21028 (cryogenic equipment safety) and ASME B31.3 (process piping codes).

Note: These valves are disposable upon activation. Regular inspections for frost damage, seal degradation, and mechanical wear are mandatory to uphold safety protocols.

(Terminology: "Breakaway Valve" is used for general clarity; "Emergency Release Coupling (ERC)" aligns with technical standards.)