Although oxygen and nitrogen gases are present in enormous quantities in our breathable air, a significant amount of money must be spent to access them separately in their gaseous or liquid form. In addition to the cost of the gas, further costs are incurred because of the special safety and logistic issues surrounding cylinder handling and storage. Still other costs to consider are tank or cylinder rental, potential liquid nitrogen evaporation, and the extra inventory sometimes held due to process variations. 

With NITROSWING® nitrogen gas generators, the solution is at your fingertips. You can now produce nitrogen... low cost, on-site, when you need it. And not only is it possible to vary the purity and pressure based on your application, but it can be done without sacrificing safety and reliability... proven performance based on thousands of our satisfied customers. What's more, all of these benefits combine to provide a short-term payback, proving "The more you use it; the more you save!"

NITROSWING® uses a proprietary CMS (carbon molecular sieve) to separate the nitrogen from air. This specifically engineered material selectively adsorbs oxygen, allowing high purity nitrogen to be produced. Compression and pretreatment of the incoming air ensure efficient and long term operation of your equipment. Our team of engineers will design and size stand-alone or turn-key systems to meet your nitrogen requirements.

Our systems are designed to work with either oil-free or oil-flooded compressors as well as desiccant or refrigerated dryers, giving you maximum flexibility.

How a PSA Works:

IGS SMC® Nitrogen PSAs use adsorption process to remove oxygen from the compressed air stream. The PSAs are controlled by a programmable controller with automatic start/stop operation, which operates the valves through a timed sequence called a cycle. 

During one cycle, compressed air enters through a solenoid operated valve from the air buffer tank. It travels into the bottom of the “on-line” tower, Adsorber Vessel 1 (AV1). As compressed air flows upwards, oxygen is adsorbed by the CMS (Carbon Molecular Sieve). Since nitrogen molecules are too large to be adsorbed by the CMS, they pass through the adsorber vessel and the purified nitrogen exits the top of the “on-line” tower. 

While the “on-line” tower is producing nitrogen, the other tower (AV2) is being regenerated. The regeneration process consists of depressurization of the tower, causing the oxygen that has collected on the CMS to be released and vented to the atmosphere. At the conclusion of the depressurization cycle, a small stream of nitrogen from the producing tower is injected into the top of the tower. This pure nitrogen is used to purge the remaining oxygen from the CMS, as the vessel completes its depressurization and purge. This vessel is then repressurized and put back into a production cycle.

The production and regeneration cycles alternate continuously from tower to tower following a predetermined PLC program.

IGS SMC® Oxygen PSAs use the similar process mentioned above. Instead of CMS, in IGS SMC® Oxygen PSAs, we use ZMS (Zeolite Molecular Sieve) to remove nitrogen from the compressed air stream.