| abstract |
A control valve assembly ( 10 ) controls the flow of water to and from a treatment tank ( 16 ) and the regeneration of the treatment material therein. A housing of the valve assembly includes connections for a tank inlet and tank outlet, An inlet chambers ( 60 ), outlet chamber ( 34 ), a pressure-operated inlet valve ( 24 ) and an outlet valve ( 32 ). A pair of venturi chambers ( 81 a , 81 b ) are configured to provide co-current and counter-current regeneration. A regeneration control subsystem includes a turbine ( 104 ) and a nozzle impinging thereon to produce rotation. An external port ( 130 ) receives fluid to provide a driving for the turbine in order to initiate regeneration. A bypass chamber ( 60 ) communicates with the inlet chamber ( 15 ). The inlet valve ( 24 ) has dual seating surfaces for controlling the communication between the inlet chamber, transfer chamber ( 70 ) and tank inlet ( 26 ). |