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DEWAR FLASKS

Chemical Characteristics

  • Hydrolytic resistance to DIN-ISO 719-C
  • Acid resistance to DIN-ISO 1776
  • Alkaline resistance class to DIN 52322-A2 and ISO695-A2

Optical Characteristics

The spectral region is in the range 310nm to 2200nm where absorption is negligible

Physical Characteristics

  • Linear expansion factor (20 °C to 300 °C); 3.3 x10-6 / °K
  • Density; 2.23 g/cm3
  • Specific thermal capacity: 910 J/Kg °K
  • Transformation temperature 525 °C
  • Ambient Temperature for Dewar Flask +200 °C to -200 °C


Dewar Flasks,Tempering Beakers, Large Dewars

cylindrical dewar flasks

Cylindrical Dewar Flasks For multiple applications with temperature sensitive fluids. Cylindrical dewars are available with and without handles and in blue coated or textured Aluminum finish. Sizes from 100ml to 8 liters.For versions without handles Standard Dewar Flasks for versions with handles Dewar Flasks with Handles
Cylindrical Dewar Flask Refills refills for cylindrical dewar flasks Stoppers for Cylindrical Dewar Flasks stoppers for cylindrical dewar flasks
flat bottomed dewar flasks  Flat Bottomed Dewar Flasks Suitable for storage and cooling of small samples. Flat bottom design makes for easy use of magnetic stirrers.Flat bottom dewars have a durable, textured aluminum finish and can be delivered with transparent viewing strips if required. Sizes from150ml to 2.1 liters
Dish Shaped Dewar Flasks For tempering round bottomed flasks and cooling of small sample. Dish shaped dewars come in structured Aluminum finish. Glass refills are available. Sizes from 80 ml to 5.8 liters dish shapped dewar flasks
spherical dewar flasks Spherical Dewar Flasks Combine low evaporation rate with easy pouring. Spherical dewars have a loosely attached lid, optionally fully silvered or with viewing strips. Outer cover of brushed Aluminum. Sizes from 1 liter to 10 liters
Glass & Stainless Steel Tempering Beakers doubled walled precision glass beakers with screw connections for easy assembly. Tempering medium is pumped through the double walls. Glass tempering beakerks come in sizes from 250ml to 2 liters. Stainless steel tempering beakers have similar connections but of polished stainless steel. Sizes from 500ml to 6 liters.
dewar carrying flasks Dewar Carrying Flasks Storage and transport of temperature sensitive items. Dewar carrying flasks have insulating lids with clips; available in blue coated cover or stainless steel. Sizes from 1 liter to 4 liters.
Stainless Steel Dewar Flasks For multiple applications with temperature sensitive fluids. Stainless steel dewar flasks come with side handles (GSS) or without side handles(DSS). Both versions have a looped carrying handle. Sizes from 500 ml to 6 liters

Flange Top Dewar Flasks Cylindrical Dewar Flasks with glass flange tops for clamping to apparatus and for attachment of special tops and lids to make gas tight joints. The flasks are available from 200mL to 8 liters. they can be delivered partially silvered or un silvered

Large Insulating Dewar Flasks Large dewars for storage and transport of temperature sensitive items. Blue coated or structured Aluminum cover; available fully silvered or with viewing strips. Sizes from 4 liters to 40 liters.		 large dewar flasks

Screw Top Cylindrical Dewar Flasks are provided with a GL 32 or GL 45 glass screw thread for tightening caps. The dewar flasks are cylindrical and can be delivered with a protective blue coated aluminum container or as refills. The dewars are fully silvered and optionally can be delivered partially silvered with viewing strips or unsilvered.

Thermoguard Vacuum Insulated Food Containers Combine the insulating properties of high quality Dewars with specially produced hygenic insulating lids. Thermoguard containers are ideal for keeping cold food like ice cream cold for long periods or hot foods hot also for long periods. Sizes range from 5 liters (approximately 1 gallon) to 26 liters (5.65 gallons).

The special lids provide excellent insulation and maintain temperature over prolonged periods

All glass equipment manufactured by KGW-Isotherm is made from Boro-silicate Glass in accordance with ISO/DIN specifications 3585.

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