Liquid Nitrogen Dewars – cryo dewars supplier

 

Liquid Nitrogen Dewars – cryo dewars supplier

Standard liquid nitrogen dewars come in sizes from an ultra-compact 6L cryogenic dewar to a sizeable horizontal tank that holds 425 liters.
Established in 1998, DSW Industry has high-quality specialized liquid nitrogen dewars and liquid nitrogen tanks available in various sizes.
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 solutions in customer services for Nitrogen Dewar, Liquid Nitrogen Containers, Cryo tanks, and  Dewar Flasks.

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Cryogenic Dewars for Liquid Nitrogen, Argon, and Oxygen

Dewar Flasks

Open-mouth dewar flasks sized with 4″ to 96″ diameters and depths of 20′.
These portable dewars are great for transporting and storing liquid nitrogen (LN2) and oxygen or argon at low pressure.
Their variety of options makes this versatile container suitable for lab, industrial, or technical uses.

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.

Cryogenic Transport

Cryogenic transport vessels are designed to be mounted in vehicles, with features that make the delivery of liquid gases safer and easier. Made to DOT 4L specifications in sizes from 300 liters to 425 liters.

450L Nitrogen Liquid Dewars

Cryogenic dewars provide high-performance solutions for safely and securely storing large or small amounts of liquid nitrogen or other liquid gases safely and securely. Constructed with high-density materials for strength, these storage tanks can even withstand chemicals or corrosive liquids without issue; wide-mouthed openings allow easy transference or pouring without spillage of samples from storage.

Dewar Tank Sizes

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

1. Design and Features:
   • Vacuum Flask Structure: Dewars have a double-walled vacuum flask design to minimize heat transfer and maintain low temperatures.
   • Super Insulation: High-strength aluminum shells with super insulation provide advanced thermal protection.
   • Neck Tube: The neck tube connects the inner and outer containers, ensuring durability and minimizing nitrogen loss.

Inspection guarantee of cryogenic Dewars:

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 for 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 ensure no oil stains and other organic impurities in the inner containers.
After cleaning, the inner and outer containers will be assembled at a time interval of 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 to ensure cleanliness.
The inner and outer surfaces of the outer containers will be subject to overall sandblasting treatment to meet the requirements of the Sa-2.5 standard.
When the surfaces of steel plates show a metallic color, a vacuum cleaner will suck off the dust adhered to the surface to ensure the vacuum degree in the interlayer further.
Special high-quality perlite is used as the insulation material in the interlayer.
The perlite will be treated using our company’s unique process before being in the interlayer.
All the internal cylinders, after being manufactured, will be subject to gas-tight and pressure performance tests.
The internal and outer cylinders will be subject to rigorous Helium mass spectrum leak detection.
After production, all the pipe openings will be opened to carry out nitrogen purging and replacement 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 to protect the tanks.

Cryogenic Dewar for All Applications

Limitations have yet to be set regarding cryogenic applications, yet our equipment and talent have already found applications such as:
Industrial
Laboratory
Medical
Homecare
Biotechnology
Semiconductor
Superconductivity
Pharmaceutical