Dewar vessels

Variants

  • Dewar vessels
  • Cold traps
  • Tempering cup
  • Reaction vessels
  • Cryogenic container
  • Columns
  • Cold traps Cold finger S29 / SL29
  • Cold traps Cold finger S29-A / SL29-A
  • Cold traps Cold finger two-piece S29-Z / SL29-Z
  • Cold traps Cold finger V2A S54K16-Z / S54K25-Z
  • Cold traps High-performance cooling fingers V2A large
  • Cold trap complete KF /KFL
  • Cold trap complete KF-A / KFL-A
  • Cold trap complete two-piece KF-Z /KFL-Z
  • Cold trap V2A complete KF54VK16-Z / KF54VK25-Z
  • Cold traps High-performance cold traps V2A large complete
  • Cold trap GKF
  • Pump forks / Schlenklines
  • Cold gas systems
  • Cryostats
  • LHe Lifter
  • Sulphurizing flask
  • Wet extinguishing curve NLK
  • LN2 level control
  • Cold shrinking with LN2
  • Large insulation box
  • Heat protection container
  • Disposal cans
  • Chemical pumping station – CP
  • Chemical pumping station – GP
  • Cylindrical Dewar flask
  • Stainless steel Dewar flask
  • Dewargefäß mit flachem Boden
    Dewargefaess-with flat bottom
  • Dewar flask – bowl shape
  • Dewar vessel – Dewar transport vessels
  • Dewar vessel – spherical shape
  • Dewar flask – large Dewar insulated flasks
  • Dewar flask – large Dewar insulated flasks in box form
  • Dewar flask – with laboratory flat flange
  • Dewar flask – with flange
  • Dewar vessel – Dewar transport vessels BIO-BE-CO2
  • Dewar vessel – Dewar transport vessels BIO-BE-LN2
  • Dewar flask – with standard thread
  • Dewar flask – with integrated magnetic agitator
  • Cryostats – LN2 Glass cryostats
  • Cryostats LN2 with head flange
  • Cryostats LN2 with constriction
  • Cryostats LN2 constriction+head flange
  • Cryostats LHe Glass cryostats
  • Cryostats LHe with head flange
  • Cryostats LHe with constriction
  • Cryostats LHe constriction+head flange
  • Cryostats LHe KGZ with LN2 cooling shield
  • Cryostats LHe KGS with LN2 cooling shield
  • Cryostats LHe Customized
  • Cryostats racks
  • Cryostats lids and accessories
  • Cryostats LHe Siphon
  • Cryostats catalog
  • Reaction vessel single-walled not temperature-controlled
  • Reaction vessel, double-walled, with heating jacket GL18
  • Double-walled reaction vessel with DN15 heating jacket
  • Three-walled reaction vessel with vacuum jacket and heating jacket DN15
  • Double-walled reaction vessel with bulbous heating jacket
  • Reaction vessel with flat bottom and heating jacket connection
  • Reaction vessel Sulfurizing flask with tempering jacket and volume scale
  • Reaction vessel Lid
  • Reaction vessel racks
  • Reaction vessel Complete table setups
  • Complete reaction vessel setups
  • Reaction vessel accessories
  • Reaction vessel Floor drains
  • Reaction vessel configuration wizard
  • Cold trap assistant
  • Special pumping stations
  • Cryogenic container type Apollo
  • Cryogenic container type Juno
  • Cryogenic container type aluminum
  • Cryogenic container type Alu-DMType Alu-DMT
  • Cryogenic container Special removal siphon
  • Cryogenic container LN2 Special withdrawal hoses
  • Cryogenic container handles
  • Cryogenic container type ARPEGE
  • Cryogenic container type VOYAGEUR
  • Cryogenic container type BIO
  • Cryogenic container type BIOSAFE
  • Cryogenic container type DSS-D
  • Cryogenic container Level Control LN2
  • Tempering beaker made of glass
  • Tempering cup made of stainless steel
  • Temperature control cup configuration wizard
  • Cold gas systems type T-G
  • Cold gas systems type TG-LKF
  • Cold gas systems type TG-LKF-H
  • Cold gas systems type TG-KKK
  • Cold gas systems type TG-RD
  • Cold gas systems Special systems
  • Cold gas systems Safety controller
  • Cold gas tool software
  • Cold gas systems configuration wizard
  • Cold gas systems type TG-RID
  • Cryogenic gloves and accessories

Dewar vessels made of glass

All Dewar vessels manufactured by KGW-ISOTHERM are made of borosilicate glass 3.3 DIN/ISO 3585 (DWK or Schott Tubing). They are manufactured in accordance with the “Pressure Equipment Directive”, Directive 97/23 EC, (N4 with Appendix 1) and DIN EN ISO 16496 “Appliances with vacuum insulation”.

Structure and function of a glass Dewar flask

Dewar flasks made of glass are double-walled vacuum-insulated containers. They have the task of thermally insulating a product (LN2, CO2 or other coolant) stored in them against the ambient temperature. Dewar vessels consist of an inner and an outer flask, which are fused together at the top of the neck opening. The space between the inner and outer flask is vacuum-insulated to prevent heat contact between the product stored in the Dewar flask and the ambient temperature (contact heat). In addition, Dewar vessels made of glass have a silver coating in the vacuum chamber to minimize heat radiation. Optimum insulation is achieved by reducing both contact heat (vacuum) and radiant heat (mirror coating).

For safety and occupational safety reasons, the glass Dewar flasks must always be installed in a protective casing. This protective coating can be made of sheet metal, aluminum, stainless steel or a transparent PU coating.

All standard glass Dewar flasks may only be used up to a maximum overpressure of 0.1 bar. Higher working pressures on request.

Types of silver plating and their influence on evaporation rates

Dewar flasks made of glass are double-walled vacuum-insulated containers. They have the task of thermally insulating a product (LN2, CO2 or other coolant) stored in them against the ambient temperature. Dewar vessels consist of an inner and an outer flask, which are fused together at the top of the neck opening. The space between the inner and outer flask is vacuum-insulated to prevent heat contact between the product stored in the Dewar flask and the ambient temperature (contact heat). In addition, Dewar vessels made of glass have a silver coating in the vacuum chamber to minimize heat radiation. Optimum insulation is achieved by reducing both contact heat (vacuum) and radiant heat (mirror coating).

For safety and occupational safety reasons, the glass Dewar flasks must always be installed in a protective casing. This protective coating can be made of sheet metal, aluminum, stainless steel or a transparent PU coating.

All standard glass Dewar flasks may only be used up to a maximum overpressure of 0.1 bar. Higher working pressures on request.