| Product Overview
The 210L Dewar Flask is a premium low-temperature thermal insulating pressure vessel engineered for reliable storage and transportation of cryogenic liquids including liquid oxygen (LO2), liquid nitrogen (LN2), liquid argon (LAr), liquid carbon dioxide (LCO2), and liquefied natural gas (LNG). Featuring a double-layer stainless steel vacuum structure, the inner tank securely holds cryogenic media while the outer wall is wrapped with 25 layers of high-performance thermal insulation materials. The vacuum-sealed sandwich layer between the two tanks minimizes heat transfer, forming an exceptional thermal insulation system that reduces evaporation loss. With models like DPL-210, DPL-210H, and DPL-210X offering working pressures ranging from 1.4 MPa to 2.88 MPa, this dewar flask delivers continuous gas supply and is ideal for high-demand scenarios requiring large-volume cryogenic storage. Its geometric volume of 210L and effective volume of 199L ensure ample capacity for industrial, scientific, and healthcare applications.
| Core Advantages
Superior Thermal Insulation Performance
Adopting advanced high-vacuum technology and multi-layer insulation materials, the 210L Dewar Flask achieves ultra-low heat transfer efficiency, significantly lowering the evaporation rate of cryogenic liquids. This design ensures minimal waste and prolonged storage stability.
Large-Capacity & Long-Term Storage
With a maximum filling capacity of up to 281 kg for argon, 227 kg for oxygen, and 161 kg for nitrogen, this dewar flask meets high-volume storage needs. Its extremely low daily evaporation rate allows for extended storage periods without frequent refilling, perfect for remote locations or intermittent use.
Enhanced Safety & Reliability
Equipped with a robust outer casing, safety valves, rupture disks, and comprehensive pressure relief devices, the 210L Dewar Flask ensures safe operation during storage and transportation. High-quality stainless steel construction and strict manufacturing standards guarantee durability and resistance to harsh conditions.
Purity Preservation & Versatility
A premium sealing system and food-grade stainless steel inner tank prevent external contamination, maintaining the purity of stored cryogenic media—critical for high-purity LN2 and LAr applications. It supports multiple cryogenic liquids, making it suitable for diverse industries.
User-Friendly & Cost-Effective
Designed with portability in mind, many units feature wheels and handles for easy maneuvering. As a passive system (no power required), it demands minimal daily maintenance. Despite a higher initial investment, reduced refilling frequency and lower liquid consumption result in long-term cost savings.
| Application Fields
Scientific Research & Laboratories
Cryogenic Sample Preservation: Stores biological samples (cells, tissues, strains), blood, and vaccines at ultra-low temperatures using LN2 vapor or liquid phase.
Physics & Superconductivity Experiments: Provides cryogenic environments for superconducting magnets (NMR, MRI) and particle detectors.
Material Processing: Enables cryogenic treatment of metals and plastics to enhance wear resistance, and supports cryogenic grinding.
Industrial Manufacturing
Metalworking & Welding: Supplies LO2 and LAr for metal cutting, welding, and as shielding gases; LN2 serves as an assist gas for laser cutting.
Chemical & Refining Industries: Acts as an inert shielding gas for purging and blanketing, preventing oxidation in chemical processes. Also used for LNG storage and transport.
Shrink-Fit Assembly: Contracts metal parts via LN2 for easy interference fit assembly.
Healthcare & Biotechnology
Reproductive Medicine: Facilitates long-term cryopreservation of sperm, eggs, and embryos—essential for IVF and gene banks.
Organ & Tissue Storage: Enables cryogenic transport and preservation of transplant organs, skin, and bone tissues.
Cryosurgery: Stores LN2 for treating warts and early-stage skin cancers by destroying abnormal tissue.
Food & Beverage Industry
Flash Freezing: Uses LN2 for rapid food freezing, preserving texture and nutrients. Ideal for refrigerated transport.
Beverage & Culinary Applications: Used in bars and restaurants for long-lasting beverage cooling, and in molecular gastronomy for making liquid nitrogen ice cream.
Project | DPL - 210 | DPL - 210H | DPL - 210X |
Work Pressure（Mpa） | 1.4 | 2.01 | 2.88 |
Diameter x Height（mm） | 508x1707 |
Geometric Volume（L） | 210 |
Effective Volume（L） | 199 |
Maximum Filling Capacity（kg） | Oxygen | 205 | 227 | 227 |
Nitrogen | 145 | 161 | 161 |
Argon | 250 | 281 | 281 |
Natural Gas | 80 | —— | —— |
Carbon Dioxide | —— | 212 | 212 |
Oxidation 2 Nitrogen | —— | —— | —— |
| Operation & Safety Guidelines
Safe Operation Practices
Wear antifreeze gloves and goggles to avoid frostbite from direct contact with low-temperature liquids or metal surfaces.
Operate in well-ventilated areas to prevent suffocation—evaporated nitrogen displaces oxygen in enclosed spaces.
Ensure proper connection of hoses and valves; avoid overfilling (follow maximum filling capacity guidelines).
Handling & Transportation
Short-distance movement: Use a special trolley and secure the dewar flask upright.
Long-distance transport: Keep upright at all times—never dump, roll, or lay horizontally.
Stair navigation: Require two people and use a dedicated carrying rack; do not carry alone.
Maintenance Tips
Regularly clean the outer wall to prevent dust from blocking exhaust pores.
Inspect for abnormal frosting (large-area thick frosting indicates vacuum failure—stop use and contact the supplier).
Keep the bottle cap closed when empty to prevent moisture and impurities from entering, avoiding internal freezing.
Store in a corrosion-free environment to protect the stainless steel structure.
| Production Process
Material Selection: High-quality stainless steel is chosen for the inner and outer tanks, ensuring corrosion resistance and thermal stability.
Double-Layer Fabrication: Precision welding of inner and outer tanks, with strict leak testing to ensure airtightness.
Multi-Layer Insulation: Wrapping 25 layers of thermal insulation materials around the outer wall to enhance heat resistance.
Vacuum Pumping: Evacuating the sandwich layer to high vacuum to minimize heat transfer.
Safety Component Installation: Fitting safety valves, pressure gauges, and rupture disks for pressure regulation and relief.
Quality Inspection: Conducting pressure tests, thermal insulation performance tests, and leakage detection to meet international standards (e.g., TS/24159-2009).
Final Assembly: Adding handles, wheels, and valves for user-friendly operation; labeling with safety instructions and parameters.
| FAQ
What are the main hazards of operating a 210L Dewar Flask?
The primary risks are frostbite and suffocation. Prevent frostbite with protective gear; avoid enclosed spaces to reduce suffocation risk from oxygen displacement.
Can the dewar flask explode?
When used and maintained properly, it is extremely safe. Safety devices like pressure relief valves prevent overpressure, and high-quality materials resist rupture.
Is frosting on the outer wall normal?
Slight frosting near the neck tube or bottom (newly filled or high humidity) is normal. Large-area thick frosting indicates vacuum failure—cease use and contact the supplier.
How to address insufficient gas flow?
For high gas demand, connect multiple dewar flasks in parallel to a main pipeline or use an external vaporizer to avoid supply shortages and component damage.
| Call to Action
Ready to meet your high-volume cryogenic storage needs with the reliable 210L Dewar Flask? With exceptional thermal insulation, large capacity, and multi-industry applicability, it’s the perfect solution for scientific research, manufacturing, healthcare, and food processing. Inquire now for customized quotes or technical specifications. Add to Basket to secure your order—with 1000 units in stock, fast delivery is guaranteed. Trust our factory-direct supply for quality and value—elevate your cryogenic storage with the 210L Dewar Flask today!
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