Patent ID: 8535539
Filing Date: 2013-09-17
Classification: C02F

Abstract:
1. A method for regenerating the ion exchange resin bed of a resin tank for a water treatment system, wherein the water treatment system includes a control valve, wherein the control valve includes a plurality of orifices and a piston, wherein movement of the piston between a plurality of different positions is operative to change the flow of water through the orifices, wherein the orifices are in fluid communication with a source of untreated water, a treated water outlet, a brine tank, a drain, and the resin tank, wherein the method comprises: a) operating a first motor to move the piston to a first position; b) supplying a first pulse of regenerate solution into the resin tank to charge a first section of the ion exchange resin bed, wherein b) includes operating a second motor to place a regeneration valve in an open position to allow regenerate solution to flow into the resin tank and then operating the second motor to place the regeneration valve in the closed position to prevent regenerate solution to flow into the resin tank; and c) supplying a second pulse of regenerate solution to charge a second section of the ion exchange resin bed, wherein c) includes operating the second motor to place the regeneration valve in an open position to allow regenerate solution to flow into the resin tank and then operating the second motor to place the regeneration valve in the closed position to prevent regenerate solution to flow into the resin tank, wherein the second motor is operative to cause the regeneration valve to open and close independent of the position of the piston.