STERIS Finn-Aqua T-Series Pure Steam Generator offers the pharmaceutical industry patented designs to help deliver the highest pure steam quality as well as lower plant energy costs. STERIS Finn-Aqua T-Series Pure Steam Generator offers the pharmaceutical industry patented designs to help deliver the highest pure steam quality as well as lower plant energy costs. STERIS’ Finn-Aqua T-Series Pure Steam Generator offers the pharmaceutical industry patented designs to help deliver the highest pure steam quality as well as lower plant energy costs. STERIS’ Finn-Aqua Pure Steam Generator (PSG) utilizes a falling-film type evaporator which produces pyrogen free pure steam, using a unique separation technology. Feed water is continuously pumped to the top of the evaporator heat exchanger, heated by plant steam. Upon reaching the bottom of the column, the evaporated part of the feed water continues vertically up the riser space of the column and around spiral shaped guides. These spiral guides induce a centrifugal action of the steam to remove any remaining microscopic droplets that contain impurities and/or pyrogenic material. The separated droplets are then removed as blowdown.