Liquid Nitrogen Dewars

Established on 1998, DSW Industry has specilized liquid nitrogen dewars and cryogenic tanks with high quality, available in sizes ranging from a small 4″ flask to a large horizontal tank that holds 500 liters.
DSW designs and engineers the perfect accessories for efficient cryogenic liquid nitrogen storage and transfer.
We provide easy,time-saving and money-saving one-stop solution in customer services for Nitrogen Dewar, Cryogenic Nitrogen Container, Cryo Tank, Liquid Nitrogen Bottle Sizes.

cryogenic nitrogen tank sizes
DSW Series Cryogenic Nitrogen Tanks
Ideal liquid nitrogen (LN2) tanks, these portable dewars work equally well with liquid oxygen and liquid argon for low-pressure transport & storage.

liquid nitrogen dewars
DSW Dewar Flasks
Open-mouth dewar flasks sized with 4″ to 96″ diameters and depths to 20′.
This flexible container has numerous options so it can be perfectly suited to lab, industrial or technical applications.

horizontal liquid nitrogen dewars
DSW Series Horizontal Cryogenic Storage Vessels
Horizontal liquid nitrogen dewars for low-pressure transport and storage of liquid nitrogen, oxygen, and argon.
Easy to move and conveniently accessible, they are ideal for interaction with LN2 liquefiers.

450L Nitrogen Liquid Dewars

Dewars, tanks, and cryogenic transfer lines for different gases including liquid nitrogen, argon and oxygen.

Model		DSW450-175-1.37	DSW450-175-2.3	DSW450-195-1.37	DSW450-195-2.3	DSW450-210-1.37	DSW450-210-2.3	DSW450-210-3.0
Nominal volume(L)		175	175	195	195	210	210	210
Effective capacity(L)		160	160	177	177	191	191	191
Dimension(diameter*height)		Φ510*1557	Φ510*1557	Φ510*1673	Φ510*1673	Φ510*1767	Φ510*1673	Φ510*1673
Working pressure (Mpa)		1.37	2.3	1.37	2.3	1.37	2.3	3.0
Safety valve open pressure(Mpa)		1.59	2.41	1.59	2.41	1.59	2.41	3.45
Bursting disk open pressure(Mpa)		2.41	3.6	2.41	3.6	2.41	3.6	5.17
Evaporation rate(Lin)(%/d)		<2.1	<2.1	<2.0	<2.0	<2.0	<2.0	<2.0
Empty weight(kg)		≈130	≈142	≈133	≈152	≈131	≈165	≈165
Max filling weight (kg)	LO2	≈182	≈182	≈202	≈202	≈218	≈218	≈218
	LN2	≈129	≈129	≈142	≈142	≈154	≈154	≈154
	LAr	≈224	≈224	≈248	≈248	≈268	≈268	≈268
	LNG	≈68	≈68	≈75	≈75	≈75	≈75	≈75
	LCO2	—	≈188	—	≈209	—	≈225	≈225
Level gauge		Floating level	Floating level	Floating level	Floating level	Floating level	Floating level	Floating level
Surface treatment		polish	polish	polish	polish	polish	polish	polish
Base type		Rubber base	Rubber base	Rubber base	Rubber base	Rubber base	Rubber base	Rubber base

Inspection guarantee of cryogenic container:

The relevant welding seams will be subject to 100% RT non-destructive testing and penetrant testing (PT) according to the technological requirements of storage tank production.
High-purity nitrogen (up to 99.999%) will be used to conduct the strength testing.
Finally, advanced helium mass spectrometer leak detectors (with precision up to 2×10-9Pa.L/s) will be used to conduct Helium mass spectrometer leak detection.
The inner containers of the storage tanks will be passivated by overall pickling to meet the cleanliness requirements for dangerous goods.
Imported ultraviolet black light lamps will be used to make sure that there is no oil stain and other organic impurities in the inner containers.
The inner and outer containers, after cleaning, will be assembled at a time interval less than 2.5 hours.
After assembling, the inner containers and interlayers will be filled with nitrogen to protect them from dust and organic impurities, so as to ensure the cleanliness.
The inner and outer surfaces of the outer containers will be subject to overall sandblasting treatment to meet the requirements of Sa-2.5 standard.
When the surfaces of steel plates show the metallic color, a vacuum cleaner will be used to suck off the dust adhered to the surface so as to further ensure the vacuum degree in the interlayer.
Special high-quality perlite is used as the insulation material in the interlayer.
The perlite will be treated by using our company’s special process before being in the interlayer.
All the internal cylinders, after manufactured, will be subject to the gas-tight and pressure performance tests.
Both the internal and outer cylinders will be subject to rigorous Helium mass spectrum leak detection.
After the production is completed, all the pipe openings will be opened to carry out nitrogen purging and replacement, so as to meet the oxygen usage standard.
After this, all the pipelines and valves will be sealed and the tanks will be filled with 0.2MPa high-purity nitrogen for protecting the tanks.