| Product Overview
The 175L Dewar Flask (Model: DPL-450-175L) is a premium low-temperature thermal insulating pressure vessel engineered for the storage and transportation of cryogenic liquids including liquid oxygen (LO2), liquid nitrogen (LN2), liquid argon (LAr), liquid carbon dioxide, and liquefied natural gas (LNG). With a double-layer vacuum stainless steel structure, the inner tank securely holds cryogenic substances while the outer wall is wrapped in a 25-layer multi-insulated layer, paired with a high-vacuum sandwich layer to form an exceptional thermal insulation system. Boasting a geometric volume of 175L and an effective volume of 166L, it offers three work pressure options (1.4 Mpa, 2.01 Mpa, 2.88 Mpa) to meet diverse industrial and scientific needs. This welded insulated gas cylinder not only ensures continuous automatic gas supply but also minimizes evaporation loss, making it a reliable choice for long-term or remote applications.
| Core Advantages
Superior Thermal Insulation Performance
By integrating high-vacuum technology and multi-layer insulation materials, the 175L Dewar Flask achieves ultra-low heat transfer efficiency, significantly reducing the evaporation loss of cryogenic liquids. This core advantage ensures minimal waste of valuable stored media, cutting operational costs for users.
Extended Storage & High Purity Preservation
With an extremely low daily evaporation rate, the flask supports long-term storage without frequent refilling, ideal for intermittent use scenarios. Its superior sealing system and food-grade stainless steel inner vessel prevent external contamination, maintaining the high purity of stored gases such as high-purity LN2 and LAr, which is critical for scientific experiments and precision manufacturing.
Enhanced Safety & Durability
Equipped with a robust outer casing, safety valves, rupture disks, and other comprehensive pressure relief devices, the flask guarantees safe operation during storage and transportation. Constructed from high-quality stainless steel, it withstands harsh industrial environments and physical impacts, delivering a long service life and reliable performance even under extreme conditions.
User-Friendly & Cost-Effective Design
Featuring portable designs like built-in wheels and handles, the 175L Dewar Flask is easy to maneuver and operate. As a passive device (no power required), it demands minimal daily maintenance, reducing labor costs. Despite a higher initial investment, its low evaporation loss lowers refill frequency and total liquid consumption, achieving long-term cost-effectiveness.
| Application Fields
Scientific Research & Laboratories
Cryogenic Sample Storage: Ideal for preserving biological samples (cells, strains, tissues), blood, and vaccines via liquid nitrogen vapor or liquid phase storage.
Physics & Material Experiments: Provides cryogenic environments for superconducting magnets (NMR, MRI) and particle detectors; enables cryogenic treatment of metals/plastics to enhance wear resistance.
Detector Cooling: Cools semiconductor detectors in electron microscopes (SEM, TEM) and spectrometers, improving sensitivity and signal-to-noise ratio.
Industry & Manufacturing
Metalworking & Welding: Stores liquid oxygen and argon for metal cutting, welding, and as shielding gases; liquid nitrogen serves as an assist gas for laser cutting.
Chemical & Refining Industries: Acts as an inert shielding gas for purging and blanketing in chemical processes; facilitates safe LNG storage and transport.
Cryogenic Processing: Enables cryogenic grinding of rubber, plastics, and spices by embrittling materials, and supports shrink-fit assembly of metal parts.
Healthcare & Food Processing
Medical Applications: Used in reproductive medicine for cryopreserving sperm, eggs, and embryos; aids in organ/tissue transport for transplantation and cryosurgery for skin conditions.
Food Industry: Liquid nitrogen from the flask enables flash freezing of food, preserving texture and nutrients; suitable for beverage chilling and molecular gastronomy (e.g., liquid nitrogen ice cream).
Project | DPL - 175 | DPL - 175H | DPL - 175X |
Work Pressure（Mpa） | 1.4 | 2.01 | 2.88 |
Diameter x Height（mm） | 508x1500 |
Geometric Volume（L） | 175 |
Effective Volume（L） | 166 |
Maximum Filling Capacity（kg） | Oxygen | 172 | 172 | 172 |
Nitrogen | 121 | 121 | 121 |
Argon | 208 | 208 | 208 |
Natural Gas | 66 | —— | —— |
Carbon Dioxide | —— | 177 | 177 |
Oxidation 2 Nitrogen | —— | —— | —— |
| Operation & Safety Guidelines
Safe Operation Practices
Wear antifreeze gloves and goggles during operation to avoid direct contact with low-temperature liquids or metal surfaces, preventing frostbite.
Operate in a well-ventilated area to avoid oxygen displacement by evaporated nitrogen, which poses a suffocation risk in enclosed spaces.
For high gas flow rate requirements, connect multiple flasks in parallel to a main pipeline or use an external vaporizer to prevent insufficient supply and component damage.
Handling & Maintenance Tips
Short-Distance Movement: Use a special trolley and secure the flask upright; never dump, roll, or lay it horizontally.
Stair Transport: Require two personnel with a dedicated carrying rack/trolley; do not carry alone.
Daily Maintenance: Regularly clean the outer wall to unclog exhaust pores; check for abnormal large-area frosting (a sign of vacuum failure); keep the bottle cap closed when empty to prevent moisture/impurity entry.
| Production Process
The 175L Dewar Flask undergoes strict manufacturing in compliance with national and international standards (e.g., GB 24159-2009). The production process includes precision cutting of stainless steel plates, robotic welding of inner and outer tanks, multi-layer insulation wrapping, high-vacuum pumping of the sandwich layer, and rigorous pressure testing (up to 46 Mpa). Each unit is inspected for leak tightness, thermal insulation performance, and safety device functionality before leaving the factory, ensuring consistent quality and reliability.
| FAQ
Is it normal for the Dewar flask’s outer wall to frost?
Slight frosting near the neck tube or bottom for newly filled flasks or in high-humidity environments is normal. However, thick, uniform frosting (especially on the upper half) indicates vacuum failure—stop use immediately and contact the supplier.
Can the 175L Dewar Flask explode if misused?
With proper operation and maintenance (following safety guidelines and regular inspections), the flask is extremely safe. Its pressure relief devices and robust structure prevent overpressure risks.
What is the maximum filling capacity for different liquids?
It can hold 172 kg of oxygen, 121 kg of nitrogen, 208 kg of argon, 66 kg of natural gas, and 177 kg of carbon dioxide (varies by model).
| Call to Action
Ready to elevate your cryogenic storage and transport efficiency? The 175L Dewar Flask offers unmatched thermal insulation, safety, and versatility for scientific, industrial, and healthcare applications. With 10,000 units in stock, we provide factory-direct supply and customized solutions. Inquire now to get a competitive quote or add to basket for fast delivery. Our professional team is available to answer your questions and support your project needs—invest in reliability today!
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