Food & Beverage

Gas systems for optoelectronic manufacturing must be designed together with equipment space, process recipes and maintenance strategy.

Food and beverage is a major industrial-gas application outside electronics. Modified atmosphere packaging (MAP) replaces air inside the package with food-grade nitrogen, carbon dioxide, and oxygen to inhibit microorganisms and slow oxidation, extending shelf life while reducing chemical preservatives.

Nitrogen displaces oxygen and moisture to prevent lipid oxidation and aerobic microbial growth; research shows microbes struggle to multiply below ~1% residual oxygen. It also maintains package volume and protects fragile foods like chips. Carbon dioxide dissolves to lower pH and provides strong antimicrobial effect; red meat retains some oxygen to keep its color. Blends vary by product: dried foods use 100% N₂, fresh pasta 50% N₂/50% CO₂, and cooked ham or sliced poultry typically 70% N₂/30% CO₂.

Package quality depends on blend precision. At high line speeds, residual oxygen depends on purge efficiency, seal micro-leaks, and film permeability — controlled at the milliliter-per-package level. Inline headspace analyzers (electrochemical, zirconia, laser, or NDIR) verify O₂/CO₂ compliance.

In beverages, nitrogen purges or pressurizes filling lines to prevent container collapse and degasses liquids; nitrogen beer and coffee deliver a richer mouthfeel. On-site gas blenders produce food-grade mixtures on demand, replacing pre-mixed cylinders to cut cost and inventory.

HNR supplies gas blending, mass flow control, and headspace analysis products for food packaging and beverage lines, helping customers stabilize blends, control residual oxygen, and meet food-safety requirements.