Search For Products:
 

Diaphragm Pumps
Rotary Vane Pumps
VARIO Vacuum Systems
Chemistry Vacuum Systems
High Vacuum & Roots Pumps
Maintenance Kits
Vacuum Valves
Vacuum Gauges & Controls

Dewar Flasks
Stainless Steel Dewar Flasks
Liquid Nitrogen Storage
Tempering Beakers
Cold Traps
Biological Materials
Cryogenic Cooling

KF Metal Fittings
ISO-F & ISO-K Fittings
CF-UHV Fittings

PTFE & PFA Vessels
PTFE Stirrers, Bars & Shafts
Laboratory Screw Joints
PTFE Stopcocks
Laboratory Miniature Fittings
Fluoroplastic Accessories
Fluoroplastic Tubing
Desiccators & PTFE Material

Glass Reaction Vessels
Distillation Apparatus
Distillation Columns
Glass Funnels
Glass Condensers
Glass Connecting Pieces
Flasks, Flanges & Clamps

Magnetic Stirrers
Heaters / Hotplates
Mixers / Shakers
Homogenizers
Micro-metering Pumps
Burettes
Overhead Stirrers

Microscopes
Refractometers
Polarimeters
Spectrometers


Back Pressure / Relief Valves
Wafer Check Valves

Plastic Flow Meters
Gauge Isolators
Pressure Reducing Valves
Metering Ball Valves


Ultrasonic Sensors


 

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


LN2 Storage, Cryogenics, Dewar Flasks & Tempering Beakers

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 4 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
 
ALU Aluminum Liquid Nitrogen Container
Light, low cost liquid Nitrogen container. Vacuum insulated with super insulation material in the vacuum space. ALU containers are available from 7 liters ( 1.9 US gals ) to 95 liters ( 25 US gals) with a complete range of accessories for filling and take off. A roller base is available for the ALU 100. Evaporation rates are as low as 0.2 % per day
 

APOLLO Liquid Nitrogen Storage
Complete stainless steel liquid nitrogen storage unit. Transfer siphon and transfer hose with vacuum safety valve. Use of super insulation in the vacuum space reduces loses to less than 1% per day. Sizes from 50 liters (13.2 US gals) to 400 liters (106 US gals).
flat bottomed dewar flasks  Flat Bottomed Dewar Flasks Suitable for storage and cooling of small samples. Design makes for easy use of magnetic stirrers. Flat bottomed dewar flasks 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 dewar flasks have a 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 dewar flasks are delivered with a loosely attached lid; optionally fully silvered or with viewing strips. Outer cover of brushed Aluminum. Sizes from 1 liter to 5 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 beakers are available in sizes from 250ml to 2 liters. Stainless steel tempering beakers are available with 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 include insulating lid 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 are available 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 Dewar flasks 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
spherical dewar flasks
Spherical Dewar Flasks
Combine low evaporation rate with easy pouring. Delivered with loosely attached lid, optionally fully silvered or with viewing strips. Outer cover of structured Aluminum. Sizes from 1 liter to10 liters

Large Stainless Steel Dewar Flasks
High quality stainless steel Dewar flasks for industrial and research use. Very stable with flat bottoms, large dewar flasks are available in capacities from 8 liters to 572 liters. The plain top version with lid is equipped with carrying handles. Flanged top versions are manufactured to special order

Box Shaped Large Insulating Dewar Flasks
Large cylindrical Dewar flasks built into special insulating boxes with clamp on lids for storage and transport of temperature sensitive items. Versions available from 10 liters to 40 liters with linen protective bags, Insulating disks and a roller base for the largest version available as options

Waste Disposal Tanks
For storage and transport of aggressive chemicals and waste. Stable with good pouring feature. Includes screw lock. overpressure safety device, glass insert, bright red coating and warning decals. Available in sizes from 4 liters to 15 liters.

Cold Traps
Boro-silicate glass cold traps for condensing fluids. Cold traps are available with protective aluminum housings or as cold fingers. The size range provides for coolant capacity of approximately 1100 mL and condensate capacity of 150 mL and 250mL. Spherical ground glass and glass screw thread connectors are available

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

terms & conditions privacy for suppliers