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Multi Column Distilled Water (WFI) Plant uses a staged evaporation and condensation process to produce water for injection. Plant steam is applied only to the first column evaporator (effect) with the subsequent columns using the steam produced in the previous column as the source of energy. Similarly, cooling water is applied only at the condenser to condense pure steam into water for injection. The columns subsequent to the first column use feed water as the cooling source, which is evaporated, as the pure steam from the preceding column is condensed producing water for injection. Produced distillate and remaining pure steam is condensed in the condenser and flowing further to the plants water for injection tank.