PCI Gases is a leading global supplier of VSA Oxygen Generators for the industrial and municipal water and wastewater markets. Our modularized DOCS VSA Oxygen Systems use 50% to 60% less power than other competitive onsite oxygen supply modes. Standard models range in capacity from 0.2 to 20+ tpd of oxygen. The DOCS System’s low power usage, compact footprint, low maintenance, and low installed cost all combine to afford its users the lowest cost of ownership over any other oxygen supply mode in its capacity class. More than 500 DOCS Systems are used worldwide in applications, such as ozone generation, biological aeration, and water quality improvement.