Nitrogen Dosing

Chart Vacuum Technology

Chart Industries has been perfecting liquid nitrogen dosing for preservation, pressurization, and freezing in a wide variety of packaging applications for over 30 years. 

Being the first to market with new technologies and the only global turnkey LN2 system supplier, our premier nitrogen dosing systems have become the standard throughout the world.  

Based on the physical characteristic that one part of liquid nitrogen warms and expands into 700 parts of gaseous nitrogen at ambient temperature, Chart's engineers have designed automated dosing equipment and complete systems that precisely dispense a measured dose of LN2 into each container prior to sealing. The trapped liquid nitrogen vaporizes, creating pressure, and adding rigidity to the container – allowing for a thinner container wall.  For preservation and modified atmosphere packaging (MAP) applications, the rapidly expanding gas is allowed to escape before the product is sealed, flushing out oxygen, and extending product shelf life.

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See all related videos on Nitrogen Dosing.

  1. Vacuum Insulated Storage: From bulk tank storage to Perma-Cyl® MicroBulk systems ( to Dura-Cyl® Liquid Cylinders, we have the right LN2 supply solution for your dosing needs.
  2. Vacuum Insulated Withdrawal: A vacuum insulated valve has the benefit of extremely low heat leak for minimum gas boil-off, and it eliminated unsafe ice build-up and dripping water issues.
  3. Vacuum Insulated Pipe: Vacuum insulated pipe (also referred to as Super Insulated Vacuum Line or SIVL) is the foundation for a system's heat loss efficiency and long-term integrity.
  4. Phase Separator: Chart's vacuum insulated Phase Separator provides extremely high-quality, low pressure liquid nitrogen on demand resulting in a continuous supply of unsaturated liquid nitrogen.




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LN2 Dosers

Fremont, CA



Europe - Chart Pershore

Pershore, Worcestershire,

+44 (0) 1386 556622

+44 (0) 1386 556622

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