The Day-Impex DILVAC Stainless Steel Cased Dewar Flasks are rust-free, non-corrosive, hygienic and strong. Double-walled borosilicate glass, vacuum pumped and silvered insures efficient storage, transport and use of liquid nitrogen and dry-ice. These Dewar Flasks have an all-stainless steel vented lid with self-contained insulation. Lid-clamps secure the lid for safe transportation and minimizing spillage. 

Features

• Lid-clamps for safe transportation,
• Vented lid,
• Suitable for LN2 or dry-ice,
• Available in 4 capacities/sizes.

Specifications

Holding time: 

• Approximate and relative to usage. 
• Intended only to provide a comparison of times for a Dewar with lid to empty completely after 90% fill with Liquid Nitrogen (LN2).
• This time will vary with ambient temperatures, frequency of lid removal, handling of contents, and the mass of the material being frozen.

Vapor Phase: Dewars may be used as vapor phase storage while almost empty of Liquid Nitrogen.  Liquid Nitrogen will boil off to become a very low temperature gas and the Dewar with lid on will hold vapor phase nitrogen gas at temperatures of -160^oC to -140^oC. 

Dry Ice (Frozen solid CO2): 

• Used with dry-ice (solid CO2) the Dewar will maintain temperature of approximately -90^oC.
• Holding times for CO2 are about 25% longer than those listed above for LN2

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