Because of the potential for oxidation, bright annealing requires high purity nitrogen when the oven temperature is over 1,500° F, however, the greatest volume of N₂ gas is needed during the cooling phase. As the temperature drops, the percentage of O₂ in the product stream can go up without any oxidation to the product. To this end, our proprietary purity selector switch/purity exchange valve is a perfect fit for annealing. The nitrogen generator system can be tuned down to deliver very high purity N₂ gas as well. As the temperature goes down during the cooling process, the PFX valve can be adjusted to a different nitrogen purity. Regardless of how it’s done, the annealing process is perfectly mated with a PSA nitrogen generator.

Recommended Nitrogen Systems for Bright Annealing

Nitrogen Cylinder Filling
Nitrogen cylinder filling stations can be easily incorporated into any nitrogen generator system. We offer a convenient and reliable way to fill your own cylinders for a fraction of the cost of bottled-gas purchase and delivery.

Nitrogen Membrane Generator
The nitrogen membrane generator is a complete turnkey system. It arrives at your location designed and built to your specifications and you put it online.

PSA Nitrogen Generator
On Site’s PSA nitrogen generator technology assures quick returns on your investment and stable year-to-year gas costs.

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Required Gas: Nitrogen
Purity Range: 95 – 99.999%