Electrodeionization systems are water treatment equipment that uses a combination of ion exchange resins, ion exchange membranes and direct current to transform water into ultrapure water without the need for any chemicals. EDI systems eliminate the use of chemicals and help reduce the operating and maintenance costs of the systems. EDI systems are the most advanced system developed to obtain ultrapure water. Usage areas are all sectors where pure water is needed such as power plants, process industry, pharmaceutical industry, laboratories.Reverse osmosis systems are generally used before EDI systems. With reverse osmosis systems, the conductivity value is max. After 10 μs/cm reduction, it is passed through the Edi system to obtain ultrapure water.As a compact system, the EDI system consists of modules, control panel, chassis, piping, control valves and instruments. Module selection and quantity can be determined according to the desired capacity.