High-Vacuum 450L Industrial Dewar Flask

| Product Overview

The 450L Dewar Flask is a high-performance low-temperature thermal insulating pressure vessel designed for the storage and transportation of cryogenic fluids such as liquid oxygen (LO2), liquid nitrogen (LN2), liquid argon (LAr), carbon dioxide (LCO2), and liquefied natural gas (LNG). Featuring a double-layer vacuum stainless steel construction, the inner tank is dedicated to holding cryogenic liquids, while the outer wall is coated with multi-layer thermal insulation materials. The vacuum-sealed sandwich layer between the two tanks creates a highly efficient thermal insulation barrier, minimizing heat infiltration and evaporation. With a geometric volume of 450L and effective volume of 427L, this flask delivers continuous automatic gas supply, catering to medium to high-demand applications. Available in three pressure ratings (1.4Mpa, 2.01Mpa, 2.88Mpa) under models DPL-450, DPL-450H, and DPL-450X, it offers flexibility for diverse industrial and commercial needs.

| Core Advantages

Exceptional Insulation Efficiency

The 450L Dewar Flask integrates advanced high-vacuum technology and multi-layer insulation materials, achieving minimal heat transfer. This design significantly reduces the evaporation loss of cryogenic liquids, ensuring maximum retention of stored media and optimizing operational efficiency.

Versatile Application Range

Compatible with a wide range of cryogenic liquids (LN2, LO2, LAr, LNG, LCO2), the flask is suitable for scientific research, manufacturing, healthcare, and food processing. Its adaptable pressure ratings and filling capacities make it a versatile choice for various industry requirements.

Robust Safety Features

Engineered with a durable outer casing, integrated pressure relief valves, and precision pressure regulators, the flask ensures safe operation under all conditions. Strict quality control during manufacturing guarantees resistance to physical impacts and harsh environments, minimizing operational risks.

Long-Lasting Durability

Constructed from high-quality stainless steel, the 450L Dewar Flask exhibits excellent corrosion resistance and structural stability, withstand industrial wear and tear for an extended service life. Its rugged design ensures reliability even in demanding working conditions.

Easy Maintenance & User Convenience

Designed with portability in mind, the flask includes ergonomic handles and optional wheeled bases for easy maneuvering. The passive (no power needed) operation and simple structure require minimal daily maintenance, reducing downtime and operational costs.

Purity Preservation

A high-performance sealing system and stainless steel inner vessel prevent contamination from external particles and moisture, maintaining the purity of stored cryogenic liquids. This is critical for applications requiring high-purity media such as scientific experiments and medical processes.

| Application Fields

Scientific Research & Laboratories

Cryogenic Sample Preservation: Stores biological samples, cell cultures, vaccines, and blood products requiring deep-freeze storage using liquid nitrogen.

Physics & Superconductivity: Provides the necessary cryogenic environment for superconducting magnets in NMR machines and particle physics experiments.

Material Science: Enables cryogenic treatment of metals and plastics to enhance hardness and durability; supports cryogenic grinding of sensitive materials.

Analytical Instrumentation: Cools detectors in spectrometers and electron microscopes, improving measurement accuracy and sensitivity.

Industrial Manufacturing

Metal Fabrication: Supplies liquid oxygen and argon for welding, cutting, and brazing processes; liquid nitrogen acts as a shielding gas for laser cutting.

Chemical Processing: Serves as an inert gas for purging, blanketing, and preventing oxidation in chemical reactions; suitable for LNG storage and transport.

Plastic & Rubber Industry: Facilitates cryogenic grinding of polymers and rubber, producing fine powders for processing.

Mechanical Assembly: Enables shrink-fit assembly of precision components by contracting metal parts for seamless integration.

Healthcare & Biotechnology

Reproductive Health: Supports long-term cryopreservation of sperm, eggs, and embryos for fertility clinics and gene banks.

Transplant Medicine: Ensures safe transport and storage of organs, tissues, and skin grafts for transplantation procedures.

Dermatology: Stores liquid nitrogen for cryosurgical treatment of skin lesions, warts, and early-stage cancers.

Medical Equipment: Provides continuous cooling for specialized medical devices such as MRI scanners and cryopumps.

Food & Beverage Processing

Rapid Freezing: Uses liquid nitrogen for flash freezing of fruits, vegetables, seafood, and prepared meals, preserving freshness and nutrients.

Beverage Cooling: Offers efficient cooling for beers, cocktails, and non-alcoholic beverages in hospitality settings; ideal for molecular mixology.

Ice Cream Production: Enables the creation of premium liquid nitrogen ice cream with smooth texture and intense flavors.

Wine Service: Features elegant, decanter-style designs for quick and precise cooling of wine to optimal serving temperatures.

| Operation & Safety Guidelines

Safe Handling Practices

Always wear appropriate personal protective equipment (PPE) including antifreeze gloves, goggles, and protective clothing to prevent frostbite.

Operate in well-ventilated areas to avoid oxygen depletion caused by evaporated cryogenic gases.

Avoid overfilling the flask; adhere to the maximum filling capacities specified for each liquid type.

Transportation & Movement

Short-distance transport: Use a dedicated trolley with secure straps to fix the flask in place.

Maintain vertical orientation during all movements; never tilt, roll, or invert the flask.

Staircase movement: Require two trained personnel and use a specialized carrying frame—never attempt to carry the flask alone.

Maintenance Procedures

Regularly clean the outer surface to remove dust and debris, ensuring unobstructed ventilation.

Inspect the flask for signs of damage, corrosion, or abnormal frosting; report any issues to the supplier immediately.

Keep the bottle cap tightly closed when not in use to prevent moisture ingress and internal freezing.

Store the flask in a dry, well-ventilated area away from corrosive chemicals and direct sunlight.

| Production Process

The manufacturing of the 450L Dewar Flask follows strict quality control standards to ensure performance and safety:

Raw Material Inspection: High-grade stainless steel is inspected for chemical composition and mechanical properties to meet industry standards.

Tank Fabrication: The inner and outer tanks are formed using precision stamping and rolling processes, ensuring dimensional accuracy.

Welding & Assembly: Automated TIG welding is used to join tank components, ensuring airtightness and structural strength; pressure relief valves, gauges, and valves are installed.

Insulation Application: The outer tank is wrapped with multi-layer thermal insulation materials (25 layers) to minimize heat transfer.

Vacuum Evacuation: The sandwich layer between the inner and outer tanks is evacuated to a high vacuum using specialized equipment, eliminating conductive and convective heat transfer.

Pressure Testing: Each flask undergoes hydrostatic pressure testing and vacuum retention testing to ensure leak resistance and structural integrity.

Calibration & Quality Control: Safety valves, pressure gauges, and regulators are calibrated to meet specifications; final inspection verifies compliance with international standards.

Finishing & Packaging: The outer surface is polished and coated for corrosion resistance; the flask is packaged with protective materials for safe transportation.

| FAQ

What is the work pressure range of the 450L Dewar Flask?

The flask is available in three work pressure options: 1.4Mpa (DPL-450), 2.01Mpa (DPL-450H), and 2.88Mpa (DPL-450X), catering to different application requirements.

How to determine if the flask's vacuum insulation is intact?

Check for abnormal frosting: slight frosting near the neck or bottom is normal, but large-area thick frosting indicates vacuum failure. Stop use immediately and contact the supplier for repair or replacement.

What is the maximum filling capacity for common cryogenic liquids?

For oxygen (442kg), nitrogen (311kg), argon (535kg), natural gas (170kg), carbon dioxide (452kg), and nitrous oxide (420kg) (varies by model).

Can the 450L Dewar Flask be used for both storage and transport?

Yes, the flask is designed for both stationary storage and transportation. Its robust structure and secure handling features ensure safe transport of cryogenic liquids.

| Call to Action

Upgrade your cryogenic storage and transport system with the reliable and versatile 450L Dewar Flask! Whether for scientific research, industrial manufacturing, healthcare, or food processing, this high-performance vessel delivers exceptional insulation, safety, and durability. With 1000 units in stock, we offer fast delivery and factory-direct pricing. Contact our sales team today to discuss technical specifications, customization options, or bulk ordering discounts. Click "Inquire" or "Add to Basket" to take the first step toward efficient cryogenic liquid management. Trust the 450L Dewar Flask for consistent performance and long-term value—your ideal partner for all cryogenic storage needs!