Dewar Flasks

We are offering Dewar Flasks, which are used for short-term storage of ice water, dry ice-solvent and liquid nitrogen. These are chemical resistant HDPE double walls are filled with CFC free urethane foam and withstand temperatures from -196°C to +100°C. Our range is available as per the requirements and applications of various sizes and capacities.

 

Features

• Vented, insulated cover
• All sizes feature moulded-in ribs, cover securing tabs, pour spout and bottom grip area for added safety
• Convenient bail-type handle

We supply Vaccum Flask/ Cold Trap

Applications

• Gas cleaning by condensation e.g. in vacuum systems

Advantages

• Made of Borosilicatglass 3.3
• Good chemical resistance
• Good thermal resistance
• Deliverable: 
• :Type GKF: aluminium foot (Standard), all around protection
• With special joints: e.g. - small flange KF NW 25, olive, DN flange 15-25
• Type GKS: incl.4-foot base (special design)

Construction Details

• Two condensation walls, cooled by liquid nitrogen ( LN2 )
• Integrated Dewar flask
• Viewing stripes for observation of the condensation process
• Condensate outlet with O - ring sealing
• Protecting cover made of aluminium
• Coolant capacity : ca. 1100 ml
• Condensate capacity : ca. 250 ml
• Joints: to pump : ground cone NS 29, to plant : socket NS 29

Article Numbers
Accessories

The DF Series of vacuum insulated dewars are manufactured entirely from stainless steel for use with liquid nitrogen in a wide range of experiments / applications. These dewars combine strength with vessel performance, and are ideally suited to laboratory and industrial applications.

 

• Loss reducing plug cap
• Suitable for a wide range of immersion applications
• Cold trap operations
• Intermediate / larger sizes on request
• Roller base for DF-50

We supply Dewar Carrying Flasks

Application

• Storage and transport of temperature-sensitive goods e.g. dry ice ( CO2 )
• Flexible applications in laboratory
• Cooling of small samples
• As high quality insulating flask
• When storing liquid nitrogen ( LN2 ) a hole ( Ø ca. 2 mm ) in centre of the lid is necessary.

Advantages

• Robust design
• Made of Borosilicatglass 3.3
• Incl. insulated lid, held by two spring clips
• Incl. handle made of aluminum

Versions

• B : blue coated metal cover
• BE : stainless steel cover
• A : glass refill ( without cover )

Cold traps are used in conjunction with vacuum pumps to collect condensation produced from humidity or solvents and these cold traps can be used for many different tasks. The most common application is collecting condensation produced from humidity or solvents from rotating discs, vacuum pumps or high vacuum systems that use oil diffusion or turbo-molecular pumps. In this case a common coolant such as liquid nitrogen (LN2) or dry-ice (CO2) with acetone is normally used.

Application

• Gass cleaning by condensatione.g. in vacuum systems

ADVANTAGES

• Made of Borosilicatglass 3.3
• Good chemical resistance
• Good thermal resistance
• Simple low cost disgn
• Quick exchange is possible

Deliverable:

• Spherical Joint S29 (standerd)
• With o-ring sealing
• Spherical joint S29 (standerd )
• Glass screwthread with olive GL 18
• Special dimensions
• Special joints e.g.-small flange KF NW
                            -DN flange

Application

• Storage and transport of temperature sensitive Goods e.g. dry ice ( CO2 )
• Suitable as insulating flask

Advantages

• Robust design
• Large aperture
• Made of Borosilicatglass 3.3
• Insulated lid ( incl. grip )
• Handle or two grips
• Deliverable: fully silvered ( standard ), silvered with viewing stripes, incl. quick release clamp, shortene

Versions

• C : blue coated metal cover
• CAL : structured aluminium cover
• Series 40 - 47 is suitable as glass refill of series 30/4 - 35

Accessories

• linen bag for easy handling of dry ice ( CO2 )
• insulating discs, recommendable when storing dry ice

Our company is offering a wide range of Liquid Nitrogen Flasks available in various sizes and capacities as per their required applications. Fabricated from stainless Steel or glass for use with liquid nitrogen in a wide range of applications, these combine strength with vessel performance. These are mainly used in laboratory and industrial applications and are available in capacities such as 100 Ml  to 8000 liters.

 

Application

• flexible applications in laboratory
• cooling of small samples
• storage: liquid nitrogen ( LN2 ), dry ice ( CO2 ), other coolants as insulating flask

Advantages

• high insulating ability
• easy handling
• made of Borosilicatglass 3.3
• deliverable: fully silvered ( standard ), not silvered, silvered with viewing stripes, shortened

Versions

• C : blue coated metal cover
• G-C : blue coated metal cover incl. side grip

Application

• Lockable Dewar Flasks
• Overflow protected Dewar flasks
• If using gassing coolant, take care of the max.over pressure of 0,1 bar !

Advantages

• With screw flange GL 32 or GL 45
• Easy handling
• Made of Borosilicat glass 3.3
• Deliverable: Fully silvered ( standard ), Not silvered, Silvered with Viewing stripes, Shortened

Versions

• C:Blue-coated metal cover
• A:Glass refill (without cover )

Application

• Tempering of round bottom flasks
• Cooling of small samples
• Suitable as a hot or cold bath
• Suitable on magnetic stirrer

Advantages

• Easy handling
• Aluminium cover: Antimagnetic, Stainless
• Made of Borosilicatglass 3.3
• fully silvered

Versions

• CAL : structured aluminium cover
• A : glass refill ( without cover )

Application

• Storage and transport of liquid nitrogen ( LN2 )

Advantages

• Low evaporation rate
• Good tipping stability
• Made of Borosilicatglass 3.3
• Incl. loose lied lid
• Incl. handle
• Geliverable: fully silvered ( standard ), silvered with viewing stripes

Versions

• AL : aluminium cover, brushed
• A : glass refill ( without cover )

Applications

• Mixing of substances in the range of - 200 to +200°C
• Flexible use in laborator

Advantages

• Insulated stirrer flask
• Compact design
• Good tipping stability
• Short distance to the stirring rod
• Dewar flask deliverable: Fully silvered ( Standard ), silvered with viewing stripes

Accessories

• Loose lied insulating plug
  Operating temp. : -200 to +80 °C, For type MRD 1, For type MRD 2 S
• PTFE covered stirring rod : length : 30 mm, diameter : 6 mm, article No. : 11630
• Magnetic Stirrer: IKA Color Squid, IKA Big Squid

Application

• Tempering of liquids
• The tempering medium is pumped round the double walled casing with the aid of a thermostat.

 

Advantages

• Made of Borosilicatglass 3.3
• Operating temperature: max. 300 °C for Type T, max. 120 °C for Type T-GL
• Coolant ram pressure max. 0,5 bar
• High thermal resistance
• Very good chemical resistance
• Transparency
• Deliverable: various special jacket joints, special dimensions

Technical Specifications

Different sizes and measurement available on request.

Article Numbers

Our most popular standard product is a foam vessel that holds 800 ml of liquid nitrogen. The shape of the foam dewar is circular, with a protruding handle, so that it resembles a large teardrop. Each bowl shaped vessel comes with a matching foam lid to insulate the contents from ambient air. The dimensions of the cylindrical cavity in this standard size vessel are 5.8 inches in diameter by 2.8 inches deep.

For custom designed foam dewars, please contact us for more information. We would like to assist you with any special cryogenic requirements that you may have for research, industry or education.

Our standard foam vessel, designed to replace a low-profile Dewar, was originally developed at the Advanced Light Source of the Lawrence Berkeley National Laboratory, and is made of a durable and chemically inert foam with excellent insulating properties. Its patent pending design makes the foam vessel easier to handle and safer to use than a traditional low profile glass Dewar. Also, because of its lower thermal mass, a foam vessel will cause less liquid nitrogen boiloff when it is filled. It also will accumulate less frost during regular use. the end result is that less LN is consumed.