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.