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Healthcare: Portable LOX supply for hospitals, clinics, and emergency units, ensuring uninterrupted respiratory support.
Industrial Fabrication: Filling liquid-oxygen cylinders for oxy-fuel cutting and welding, improving process consistency and safety.
Research & Laboratories: Precise cryogenic delivery for analytical instruments, cryobiology, and materials science experiments.
Aerospace & Defense: Ground-support oxygen refilling for aircraft systems, rocket test stands, and environmental simulation chambers.
        

Introduction
Cryogenic liquid oxygen (LOX) dispensers are critical for safely storing and delivering high-purity oxygen at temperatures below −183 °C. The CRYO-800L-V-Oxygen system pairs an 800 L vacuum-insulated vertical vessel with a towable trolley, enabling easy relocation within hospitals, research labs, and industrial sites. By maintaining liquid oxygen at its boiling point, the dispenser minimizes vaporization losses (≤ 0.45% per day) and ensures on-demand availability for life-support, analytical, and process applications.

Design & Construction
• Double-Wall Vacuum Insulation: Two concentric vessels—a stainless-steel (SS-304) inner tank and an SS-304 outer jacket—create a high-vacuum annulus, often augmented with perlite or multi-layer insulation, to reduce heat ingress and boil-off.
• Structural Materials: All wetted and supporting components are Austenitic SS-304, chosen for cryogenic toughness, corrosion resistance, and compliance with ASME Section VIII and EN 13458-2:2002 standards.
• Towable Trolley: A robust frame with lockable heavy-duty casters and ergonomic handles allows safe maneuvering without specialized lifting equipment.

Key Features
• Self-Pressurizing Coil: A star-finned aluminum coil submerged in the liquid builds vapor pressure, enabling gravity-fed dispensing without external compressors.
• Economizer Function: Automatic pressure regulation maintains set delivery pressure, minimizing losses during low-rate withdrawals—critical for intermittent medical or laboratory demands.
• Low Evaporation Rate: Boil-off losses are kept below 0.45% per day through superior insulation and economizer control.
• Advanced Valving: Extended-spindle Bestobell cryogenic valves, full-port ball cocks (20 NB/15 NB), and dual safety relief valves with diverter ball valves ensure precise flow control and over-pressure protection.

Technical Specifications

  

    

      
Parameter
      
Specification
    
  
  

    

      
Net Capacity
      
800 L (± 3 %)
    
    

      
Inner/Outer Vessel Material
      
Austenitic Stainless Steel (SS-304)
    
    

      
Insulation
      
Vacuum + Perlite or Multi-layer insulation to ≤ 100 µm vacuum level
    
    

      
Design Temperature Range
      
–196 °C to +40 °C (inner); –20 °C to +55 °C (outer)
    
    

      
Max Allowable Working Pressure
      
17 kg/cm² g (≈ 1.67 MPa)
    
    

      
Design Pressure (Vacuum Corrected)
      
18.633 kg/cm² g (≈ 1.83 MPa)
    
    

      
Pressure Relief Devices
      
2 Nos. SRVs + 1 No. bursting disc
    
    

      
Valves
      
Extended-spindle Bestobell; Full-port ball cocks (20 NB/15 NB)
    
    

      
Auxiliary Equipment
      
Pressure gauge, vacuum pump, cylinder-filling pump, hoses, level indicator
    
  


Applications
• Healthcare: Portable LOX supply for hospitals, clinics, and emergency units, ensuring uninterrupted respiratory support.
• Industrial Fabrication: Filling liquid-oxygen cylinders for oxy-fuel cutting and welding, improving process consistency and safety.
• Research & Laboratories: Precise cryogenic delivery for analytical instruments, cryobiology, and materials science experiments.
• Aerospace & Defense: Ground-support oxygen refilling for aircraft systems, rocket test stands, and environmental simulation chambers.

Operation & Maintenance
1. Startup & Filling: Connect the supply line, open the inlet valve, and monitor fill level via the differential pressure gauge.
2. Pressurization: Engage the self-pressurizing coil; adjust economizer settings and relief valves to maintain target discharge pressure.
3. Dispensing: Open the outlet valve and full-port cock; activate the cylinder-filling pump for high-flow requirements.
4. Standby: Close all valves; maintain vacuum in the annulus to reduce boil-off.
5. Routine Maintenance: Inspect seals, gauges, valves, and relief devices quarterly; perform hydrostatic and pneumatic tests annually; verify bursting disc integrity per regulatory intervals.

Safety & Compliance
• Pressure Protection: Dual SRVs and a bursting disc prevent inner vessel over-pressurization.
• Standards Adherence: Manufactured per ASME VIII Div 1, EN 13458-2, and ISO 21010, ensuring materials and processes meet rigorous cryogenic service requirements.
• Leak & Burst Testing: Each unit undergoes 1.5× design pressure hydrostatic testing and pneumatic leak checks to guarantee structural integrity.
• Operator Training & Documentation: Comprehensive manuals and on-site training programs reduce risks associated with cryogenic handling and emergency procedures.

Conclusion
The Neometrix CRYO-800L-V-Oxygen dispenser integrates industry-leading insulation, automatic pressure control, and robust safety mechanisms into a mobile platform. Its precise design minimizes boil-off, maximizes uptime, and adapts to diverse applications—from critical medical support to advanced research—making it a versatile, reliable solution for any facility requiring liquid oxygen delivery.