Base exchange water treatment apparatus

Claim 1

BASE EXCHARGE LIQUID TREATMENT APPARATUS COMPRISING A REGENERANT TANK, A REACTION TANK HAVING AN UNTREATED LIQUID INLET AND A TREATED LIQUID OUTLET, INLET VALVE MECHANISM, A SUPPLY LINE CONNECTING SAID VALVE MECHANISM TO A SUPPLY OF UNTREATED LIQUID UNDER PRESSURE, CONDUITS FROM SAID VALVE MECHANISM TO SAID UNTREATED LIQUID INLET AND SAID TREATED LIQUID OUTLET, A SERVICE PIPE CONNECTED FROM THE CONDUIT WHICH EXTENDS BETWEEN THE INLET VALVE MECHANISM AND THE TREATED LIQUID OUTLET, SAID INLET VALVE INCLUDING A CHAMBER IN CONSTANT COMMUNICATION WITH SAID SUPPLY LINE, AND A VALVE MEMBER IN SAID CHAMBER SELECTIVELY MOVABLE IN SAID CHAMBER IN RESPONSE TO DIFFERENCES IN PRESSURE IN SAID CONDUITS BETWEEN A SERVICE POSITION CLOSING THE CONDUIT TO THE TREATED LIQUID OUTLET AND OPENING THE CONDUIT TO THE UNTREATED LIQUID INLET TO DIRECT UNTREATED LIQUID TO THE UNTREADED LIQUID INLET AND A REGENERATION POSITION CLOSING THE CONDUIT TO THE UNTREATED LIQUID INLET AND OPENING THE CONDUIT TO THE TREADED LIQUID OUTLET TO DIRECT UNTREADED LIQUID TO THE TREADED LIQUID OUTLET, AN INJECTOR INTERPOSED IN THE CONDUIT WHICH EXTENDS BETWEEN THE INLET VALVE MECHANISM AND THE TREATED LIQUID OUTLET POSITIONED TO RECEIVE UNTREADED LIQUID FROM THE INLET VALVE AND DELIVER UNTREADED LIQUID AND REGENERATION LIQUID TO THE TREADED LIQUID OUTLET WHEN THE VALVE MEMBER OCCUPIES THE REGENERATION POSITION, A REGENERANT LINE CONNECTING THE INJECTOR WITH THE REGENERANT TANK, A DRAIN LINE COMMUNICATING WITH THE CONDUIT BETWEEN THE UNTREADED LIQUID LINE AND THE INLET VALVE, AND A DRAIN VALVE IN THE DRAIN LINE MOVABLE BETWEEN A CLOSED POSITION MAINTAINING LINE PRESSURE IN THE LAST MENTIONED CONDUIT AND AN OPEN POSITION OPENING SAID CONDUIT TO DRAIN AND THEREBY PRODUCING A PRESSURE DIFFERENTIAL ON SAID VALVE MEMBER TO MOVE THE SAME TO THE REGENERATION POSITION AND REVERSE THE DIRECTION OF FLOW THROUGH THE REACTION TANK.