Each Sea Water distilling plant shown here is capable of producing 10,000 gallons of fresh water a day. The evaporators are designed and produced at Bethlehem Steel So.'s Quincy Shipyard for Nereus Shipping of Greece. Nereus placed order for 30 of the sea water evaporators, believed to be the largest number ever covered by a single commercial order. Features include automatic operation and low cost maintenance, Bethlehem said.