Oxygen PSA Backup System for Non-Cryogenic Generator
Eliminate product loss & save time when generators go offline
When a non-cryogenic atmosphere generator goes offline, a typical backup supply is vaporized liquid of the produced gas. The difference in product purity may negatively affect the user’s process wherever the gas is used in the facility. ASTI has designed and fabricated a blending system to backup large oxygen PSA generator at a glass facility in the US.
O2-N2 Backup Atmosphere Generator tested and ready for shipment.

When a non-cryogenic atmosphere generator goes offline, a typical backup supply is vaporized liquid of the produced gas. The difference in product purity may negatively affect the user’s process wherever the gas is used in the facility. This may result in product loss for the customer and require time for personnel to adjust equipment wherever the gas is used in the plant.

ASTI has designed and fabricated a blending system to backup large oxygen PSA generator at a glass facility in the US. The system detects the increasing purity of oxygen when vaporized liquid gas backup begins to flow to the customer’s use after the non-cryogenic generators go offline for any reason. ASTI’s unit controls the rate of nitrogen introduced to the house line and monitors the resulting mixed gas purity at the desired percentage, over the entire design range of flow rates.

When the generator is back on line, the system will decrease the flow of nitrogen and eventually turn off the added nitrogen as the feed gas returns to the original purity level.

The entire system is automatic, Siemens PLC controlled with a menu-driven touch screen operator interface. The system communicates with the customer’s plant DCS through Ethernet link.

ASTI customers may specify their choice of PLC and HMI for the system they require: Allen-Bradley, Siemens, Modicon, AutomationDirect, or GE Fanuc.