Nitrogen Generators for Laser Cutting

For bright, oxide-free edges on stainless steel and aluminum, most shops target at least 99.9% nitrogen, with 99.95% commonly used when the cut edge is the final surface or must be weld-ready. Higher purities (99.99%+) are specified for reactive metals or ultrathick stainless to protect color and speed. 

If your laser/OEM or process demands extremely low oxygen content, some applications and purge circuits call for “four nines” or even “five nines” nitrogen; your system should be able to hold that spec consistently during peak demand. 

Assist gas pressure increases with thickness and cut speed; stainless programs often land around 8–14bar, while thicker sections and high-power fiber lasers can require settings in the lowtoupper teens (up to ~20bar). If your recipes regularly operate in the upper range or you see pressure dips at pierce, specify a nitrogen booster and high-pressure storage so the header never starves; Oxywise LaserGas systems support integrated compression and 300bar storage options for stable high-pressure delivery. 

Real consumption depends on nozzle diameter, laser power/speed, material and thickness; as a practical benchmark, a 2kW fiber laser can draw roughly 20–40Nm³/h depending on setup. Use your thickness mix, duty cycle, and concurrent cutting to build a weekly profile, then size the generator with adequate buffer storage to absorb transient peaks at pierce and thick gauge starts. 

Yes—PSA platforms with modular skids and larger beds (e.g., MULTISEP) are designed to supply multiple lines while holding purity and pressure, and can be expanded as capacity grows. A LaserGas configuration can also be paired with high-pressure storage to support brief, simultaneous spikes across machines without compromising edge quality. 

Onsite nitrogen systems require periodic service of pretreatment and filtration to maintain ISO clean, dry feed air, while PSA columns run continuously with automated cycling; Oxywise units include stainless steel piping, moisture protection for the molecular sieve and 24/7 duty design. To protect your parts, built-in purity analyzers, off spec purge/diversion, and data logging/remote connectivity keep nonconforming gas out of the laser head and give you full traceability. 

When you generate nitrogen on-site, you remove rental, delivery and fuel surcharges and avoid paying for boil‑off/vent losses or residual gas returned in cylinders—costs that inflate the true price per usable Nm³ of delivered nitrogen. Independent analyses and industry case studies show that eliminating transport and trucked deliveries can materially reduce nitrogen cost per part and stabilize budgets over time. 

On‑site systems remove frequent truck deliveries, cutting Scope 3 freight emissions and packaging waste tied to cylinders and pallets; several industrial gas and sustainability programs highlight the measurable footprint reduction when transport is eliminated. Major suppliers also position on‑site generation as a route to “zero transport emissions” for assist gas while maintaining uptime and quality in production environments. 

Yes—PSA generation ties into pretreated, dry air that meets ISO85731 filtration standards; Oxywise laser cutting solutions are designed around this requirement and can integrate upstream treatment as part of a turnkey skid or container. For delivery quality, Oxywise systems provide continuous O₂ monitoring, plus typical nitrogen dew point of −50 °C (optionally −70 °C) to protect optics and ensure stable cut quality. 

Your control system will automatically divert off spec gas and alarm while the PSA restabilizes, preventing low purity nitrogen from reaching the laser head; operators can verify recovery through the onboard analyzer and HMI logs or via remote monitoring.