Cryo ln2 dewar
DSW engineers and manufactures long-lasting cryogenic storage dewars,ln2 dewars designed to hold liquid Nitrogen.
The LN2 dewar tank is the most cost-effective way to store and transport liquid nitrogen. It comes in various sizes, from a 20-litre horizontal tank to a large horizontal tank with 425 litres.
These liquid nitrogen dewars feature superior vacuum performance & insulation.
What is LN2 storage dewar?
A liquid nitrogen storage dewar is a specialized vacuum flask designed to hold liquid nitrogen or liquid helium (cryogens).
These dewars are used for extremely low-temperature storage in scientific, medical, and industrial applications.
The Dewar Ln2 offer extensive capacities and is built on a proven construction. It can meet the needs for laboratory storage, fluid handling and nitrogen handling.
These Dewars combine strength, high thermal efficiency, and ease of handling.
The Dewar Flasks have an all-stainless steel construction, including vacuum Dewar, to be rust-free, anti-corrosive, hygienic, and strong.
LN2 Dewar: these portable dewars work equally well with liquified gas, liquid oxygen, and liquid argon for low-pressure transport & storage.
These liquid nitrogen Dewars can fulfil many different applications. These are simple, efficient liquid nitrogen tanks that can also be used for liquid oxygen or argon.
Cryogenic Storage Dewars specification
The Inspection Guarantee of LN2 Dewars :
According to technical requirements for LN2 dewar manufacture, all relevant weld seams are 100% RT Non-Destructive Penetrant Testing.
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 in less than 2.5 hours.
After assembly, the inner containers and interlayers will be filled with Nitrogen to protect them from dust and organic impurities and 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 colour, 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 them.
The liquid nitrogen tank consists of a vessel that is not pressurized and is specifically made from materials. The material can withstand the extreme temperature associated with liquid Nitrogen.
Liquid Nitrogen is odourless, colourless, tasteless, and nonirritating; therefore, it has no warning properties and must be carefully handled.