Dewar Tank

Product Details

Introduction

A cryogenic storage dewar (or simply dewar) is a specialised type of vacuum flask used for storing cryogens (such as liquid nitrogen or liquid helium), whose boiling points are much lower than room temperature.
Cryogenic storage dewars can range widely in size and may take several different forms, including open buckets, flasks with loose-fitting stoppers, and self-pressurising tanks. All dewars have walls constructed from two or more layers, with a high vacuum maintained between the layers. This provides very good thermal insulation between the interior and exterior of the dewar, which reduces the rate at which the contents boil away. Precautions are taken in the design of dewars to safely manage the gas which is released as the liquid slowly boils.    


Dewar Cylinder Main Technical Parameters:

Full Volume: 80L/100L/175L/195L/210L/232L/410L/500L/1000L
Work Pressure: 1.37MPa/2.3MPa/2.88MPa/3.45MPa
Inner Tank Design Temperature: -196℃
Shell Tank Design Temperature: -20℃~+50℃
Insulation: Vacuum with Multi-layer Wrapped
Stored Medium: LO2, LN2, LAr, LCO2, LNG
Inner Tank Material: SS30408 or SA240
Shell Tank Material: Q345R or SS30408    


Some applications of liquid oxygen dewar tanks    

1,Laboratory use.    

2,Gas filling station use.    

3,Used in cutting and welding factories to replace compressed oxygen cylinders and save costs.    


1、Medium Pressure Product Specifications    

Product ModelDPL-175DPL-195DPL-210DPW-499
Dimensions(mm)Φ505×1551Φ505×1675Φ505×17612113×760×995
Working pressure (MPa)1.371.371.371.59
Safety Valve Jumping up pressure(MPa)1.591.591.591.89
Bursting pressure of bursting disc (MPa)2.41*2.41*2.41*2.41(2.86*)
Geometric volume (L)175195210499
Effective volume (L)160180195460
Evaporation rate (liquid nitrogen)2.10%2.02%1.99%1.70%
Empty bottle weight (kg)125135140345
Filling weightOxygen (kg)170190205478
Nitrogen (kg)120134145334
Argon (kg)208232250585
Natural gas (kg)707884196


2、High Pressure Product Specifications    

Product ModelDPL-175HDPL-196HDPL-210HDPW-499H
Overall dimensions (mm)Φ505×1551Φ505×1676Φ505×17612113×760×995
Working pressure (MPa)2.32.32.32.5
Safety Valve Jumping up pressure(MPa)2.412.412.412.86
Bursting pressure of bursting disc (MPa)3.62*3.62*3.62*3.62(4.14*)
Geometric volume (L)175195210499
Effective volume (L)160180195460
Evaporation rate (liquid nitrogen)2.10%2.02%1.99%1.70%
Empty bottle weight (kg)143152160405
Filling weightOxygen (kg)170190205478
Nitrogen (kg)120134145334
Argon (kg)208232250585
Carbon dioxide (kg)164183197460


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