Abstract:
A dispenser (10) uses first and second flow controls (70, 73). The flow controls maintain first and second flow ranges independent of diluent pressure within a pressure range, wherein the use solution's concentration is maintained over the pressure range. A third flow control (75) may also be utilized in a third diluent passageway for maintaining a third flow range independent of the diluent pressure within the pressure range. A bypass valve assembly (41) is operatively connected to the third incoming diluent passageway. The bypass valve has a temperature control valve. The temperature control valve having a bypass passageway, wherein additional diluent is added to the use solution, thereby controlling the use solution's concentration.
Abstract:
An apparatus (10) for creating a use solution of a concentrate diluted, with a dilution rate of not more than 1:130, into a diluent (12) flowing under pressure in a line (22). A normally-closed, user activatable valve (18) is operatively coupled in the line allowing the diluent to flow in the line upon user activation. A flow regulator (26) is operatively coupled in the line downstream of the valve (18), configured to maintain a constant flow rate for the diluent in the line. A constant flow rate pump (32) having an inlet and an outlet is operatively coupled to the valve (18). The inlet is adapted to be operatively fluidly coupled to the concentrate (28). The outlet is fluidly coupled to the line downstream of the flow regulator (26).