Chart’s liquid nitrogen dosing systems are used in the packaging of a wide range of products for preservation, pressurization and freezing. Key benefits are extended shelf life, reduced weight and enhanced product quality.
Nitrogen Dosing
Reducing Waste & Cost One Drop at a Time
One part of liquid nitrogen (LN2) warms and expands into 700 parts of gaseous nitrogen at ambient temperature. Chart’s automated dosers dispense a precisely measured dose of LN2 into each container prior to sealing. The trapped LN2 vaporizes, creating pressure, and adding rigidity to the container – allowing for a thinner container wall.
Adding Value One Drop at a Time
Preservation, pressurization, freezing; learn more about the 3 key features Chart nitrogen dosing systems bring to your production line and the attendant benefits in cost, efficiency and sustainability.
An exact dose of liquid nitrogen is introduced seconds before the seamer or capper. The volumetric expansion of the vaporized nitrogen pushes oxygen out of the container.
Key Benefits: oxygen reduction, extended shelf life, efficient nitrogen consumption, stabilization of organic products.
Typical Applications: automobile oil, beer, condiments, wine.
In Operation: documented studies show a 26% increase in shelf life and 90 to 95% reduction in headspace oxygen compared to traditional gaseous nitrogen purging.
A precise dose of LN2 is delivered immediately before capping or seaming. The trapped LN2 quickly vaporizes, pressurizing the container.
Key Benefits: lighter weight packaging, increased packaging rigidity, glass to plastic transition, eliminates package paneling, ease of labeling, oxygen reduction.
Typical Applications: bottled water, energy shots, flax seed oil, juices (hot and ambient fill), teas, vinegar.
In Operation: Documented 9 gram reduction in PET bottle weight with Chart’s MicroDose™ technology. Assuming the PET resin cost of $0.80/lb and a single production line running at 700 bottles/minute, this equates to an annual cost saving >$2.6 million.
A dose of liquid nitrogen is introduced to “lock in” and surface freeze the product before it’s transferred to a traditional tunnel or spiral freezer.
Key Benefits: maintains product integrity, aids in packaging and labeling, enables new products to be brought to market, enhances flavor and texture.
Typical Applications: dipped ice cream cones and iCream Café.
In Operation: liquid nitrogen flash freezing of ice cream cones provides stability and support through the packaging process resulting in improved overall aesthetics.
A large dose of liquid nitrogen is introduced into the package seconds before the seamer or capper.
Key Benefits: extended shelf life, oxygen reduction, reduced nitrogen consumption, stabilization of organic products.
Typical Applications: baby formulas, coffee, nuts, trail mix, botanicals.
In Operation: 46% reduction in nitrogen consumption using a Chart doser in lieu of traditional nitrogen gas purging.