20" Twin DI with Dual In-Line TDS Meter

This unit comes with two 20" DI resin filled filters plumbed in a series. RESINTECH MBD-30 is designed to provide demineralized water with a resistivity in excess of 10 megohm. It is specially intended for use in cartridge applications with clear (see through) housings. Such systems are typically designed without meters and rely on the changing color of the mixed bed resin to indicate exhaustion. In typical operation there is a safety line at the exit end of the cartridge, and when the color change reaches that level, the cartridge is considered exhausted and exchanged for a fresh cartridge. The actual quality that is obtained depends on the manner in which the cartridge is configured. A constant supply of high purity water can be obtained by using two cartridges in series, and allowing the first cartridge to completely change color. During this operation the second cartridge insures that the water leaving the system is of the highest purity. New cartridges are placed into the polishing position and the remaining cartridge is put into the roughing position. This insures complete utilization of all the exchange capacity, which lowers operating costs while increasing average quality.