Dewar Cylinders

Dewar cylinders, also known as cryogenic liquid cylinders, are vacuum-insulated vessels designed for the storage, transportation, and supply of liquefied gases such as liquid nitrogen (LN₂), liquid oxygen (LO₂), liquid argon (LAr), and carbon dioxide (CO₂). By storing gases in liquid form at cryogenic temperatures, Dewar cylinders provide an efficient solution for applications requiring portable or medium-capacity cryogenic storage.

Our cryogenic Dewar cylinders are available in different capacities and configurations for industrial gas supply, laboratories, medical applications, welding, food processing, biotechnology, research, and other cryogenic applications.

What Is a Dewar Cylinder?

A Dewar cylinder is a double-wall cryogenic vessel designed to minimise heat transfer and maintain liquefied gases at extremely low temperatures. The inner vessel contains the cryogenic liquid, while the outer shell provides structural protection. A high-vacuum insulation system between the two walls helps reduce heat transfer and minimise evaporation losses.

• Inner vessel – stores the cryogenic liquid.
• Outer shell – provides mechanical protection and structural support.
• Vacuum insulation – reduces heat transfer and helps maintain cryogenic temperatures.
• Pressure-building system – available on applicable models for controlled pressure generation.
• Safety devices – pressure-relief and other safety components protect the vessel during operation.

Depending on the model, Dewar cylinders can be equipped with pressure gauges, pressure-building systems, filling connections, and liquid or gas outlets for controlled cryogenic liquid withdrawal or gas supply.

Types of Dewar Cylinders

Dewar cylinders are available in different configurations according to the cryogenic gas, capacity, pressure requirements, and intended application.

Dewar Cylinder Applications

Dewar cylinders are widely used where cryogenic liquids need to be stored, transported, or supplied in relatively compact vessels. Common applications include industrial gas distribution, welding and metal fabrication, medical oxygen supply, laboratories, biotechnology, pharmaceutical production, food processing, and scientific research.

Liquid nitrogen Dewars are commonly used for low-temperature processing, biological sample preservation, laboratory applications, and food freezing. Liquid argon Dewars are widely used for welding and metal fabrication, while liquid oxygen Dewars are used for medical and industrial oxygen supply.

Key Advantages

• Efficient storage – liquefied gas provides high gas capacity relative to vessel volume.
• Vacuum insulation – reduces heat transfer and helps minimise cryogenic liquid losses.
• Controlled supply – suitable configurations allow controlled liquid or gas withdrawal.
• Flexible capacities – different configurations support laboratory, medical, and industrial requirements.
• Multiple gas options – configurations are available for LN₂, LO₂, LAr, CO₂, and other suitable cryogenic media.

Choosing the Right Dewar Cylinder

The appropriate Dewar cylinder depends on the gas type, required capacity, working pressure, withdrawal rate, application, transportation requirements, and destination market. For higher-volume or stationary storage requirements, a dedicated cryogenic storage tank may be more suitable.

Related Cryogenic Products

• Cryogenic Tanks
• Cryogenic Microbulk Tank Systems
• Cryogenic Vaporizers
• Cryogenic Tank Containers

Dewar Cylinder Manufacturer

We supply cryogenic Dewar cylinders for industrial, medical, laboratory, and specialised cryogenic applications. Different capacities, pressure configurations, valve arrangements, and equipment options can be selected according to project requirements.

Request a Dewar Cylinder Quote

Tell us your gas type, required capacity, working pressure, application, and destination market. Our team can recommend a suitable Dewar cylinder configuration and provide specifications, pricing, and export information.