Liquid CO2 Cylinders

Liquid CO2 Cylinders & CO2 Tanks

Blunet supplies high-quality liquid CO2 cylinders and liquid CO2 bottles designed for the safe storage of liquefied carbon dioxide.
These products are ideal for industrial and commercial applications where reliability and safety are essential.
Each dewar CO2 tank is manufactured in accordance with ASME and DOT standards and features advanced vacuum insulation to maintain stable cryogenic temperatures.
This design minimizes product loss and ensures consistent delivery of high-purity liquid CO₂.

Key Features

• Vacuum-Insulated Dewar Design:
  Maintains cryogenic temperatures, reduces heat ingress, and minimizes CO₂ boil-off.
• Multiple Capacity Options:
  Available in various sizes to support small-scale use and bulk storage across
  industrial applications.
• High-Strength Construction:
  Manufactured from durable stainless steel and compliant with applicable
  pressure vessel standards.
• Easy Handling & Integration:
  Equipped with standard valve connections and protective collars for safe transport
  and system compatibility.

Liquid CO2 Tank Sizes

Certifications

Our dewar CO₂ tanks meet the highest international standards for quality and safety.
Each tank is TÜV, TPED, CE, and DOT certified,
ensuring reliable performance for industrial and commercial applications.

Inspection Guarantee

All Blunet dewar cylinders undergo strict quality and safety inspections:

• Welding seams are 100% tested using radiographic (RT) and penetrant (PT) non-destructive testing.
• High-purity nitrogen (99.999%) is used for strength testing.
• Helium mass spectrometer leak detection ensures leak-tight performance (precision up to 2×10⁻⁹ Pa·L/s).
• Inner containers are pickled and cleaned, verified under UV light to remove oil and impurities.
• Inner and outer containers are assembled within 2.5 hours and filled with nitrogen to maintain cleanliness.
• Outer surfaces are sandblasted to Sa-2.5 and vacuum cleaned to optimize the interlayer vacuum.
• High-quality perlite insulation is specially treated before placement in the interlayer.
• All cylinders undergo gas-tight and pressure tests, followed by rigorous helium leak checks for both internal and outer containers.
• Pipelines and valves are purged with nitrogen, sealed, and tanks are filled with 0.2 MPa high-purity nitrogen for protection.

Applications

Blunet liquid CO₂ cylinders are widely used across multiple industries where
reliable and controlled carbon dioxide supply is required.

• Food & Beverage Production:
  Used for beverage carbonation, food chilling, and modified atmosphere packaging
  to maintain product freshness and quality.
• Welding & Metal Fabrication:
  Provides stable shielding gas for MIG and MAG welding processes, improving weld
  quality and consistency.
• Aquaculture:
  Applied for pH regulation and water treatment to support healthy aquatic
  environments and improve production efficiency.
• Greenhouse & Agricultural Environments:
  Supports CO₂ enrichment to enhance plant growth, photosynthesis, and yield
  control in controlled farming systems.
• Specialty Gases & Research:
  Used in laboratories and research facilities requiring precise and clean CO₂
  delivery for controlled environments.
• Fire Suppression Systems:
  Utilized in CO₂-based fire protection systems for industrial equipment rooms,
  marine applications, and enclosed spaces.
• Chemical & Pharmaceutical Processing:
  Supports process control, inerting, and reaction environments where controlled
  CO₂ supply is essential.