Multi-chemical dispensing device

A multi-chemical dispensing device comprising:

• a concentrate supply tube;
• a flow selector valve having a housing and a valve insert, said housing comprising a concentrate intake port, a first concentrate outflow port, and a second concentrate outflow port, said concentrate intake port in fluid communication with said concentrate supply tube, said valve insert including a flow chamber defined partially by a dilution member and in fluid communication with said concentrate intake port, said dilution member including two or more orifice pairs, each of said orifice pairs comprising one first orifice and one second orifice, said first and said second orifice in each orifice pair being aligned relative to a dilution member center, wherein in each said orifice pairs, said first orifice has an inner opening area allowing a fluid flow therethrough and said second orifice has an outer opening area allowing a fluid flow therethrough;
• a first proportioner in fluid communication with said first concentrate outflow port and in fluid communication with a first motive fluid supply wherein motive fluid is provided at a known first flow rate to discharge a concentrate mixture at a first dilution ratio;
• a second proportioner in fluid communication with said second concentrate outflow port and in fluid communication with a second motive fluid supply wherein motive fluid is provided at a known second flow rate to discharge a concentrate mixture at a second dilution ratio;
• a first check valve in fluid communication with said flow chamber, said first check valve being biased in an open position and operable to close upon a suction force acting within said flow selector valve;
• a second check valve operably disposed between said flow selector valve and said first proportioner, said second check valve is biased closed in a first direction opposite of fluid flow from said flow selector valve to said first proportioner, wherein said second check valve is operable to open upon a suction force applied in the direction of said first direction of fluid flow;
• and
• a third check valve operably disposed between said flow selector valve and said second proportioner, said third check valve is biased closed in a second direction opposite of fluid flow from said flow selector valve to said second proportioner, wherein said third check valve is operable to open upon a suction force in the direction of said second direction of fluid flow.

A multi-chemical dispensing device comprising:

• a flow selector valve comprising a concentrate intake port, a first concentrate outflow port and a second concentrate outflow port, said flow selector valve further comprising a valve housing and a valve insert movably mounted within said valve housing, said valve insert including a flow chamber defined partially by a dilution member, said flow chamber being in fluid communication with said concentrate intake port, and wherein said dilution member comprises one or more first orifices and one or more second orifices in fluid communication with said flow chamber wherein each of said first orifice and said second orifice have an opening area that allows a fluid flow therethrough;
• a first proportioner for discharging a mixture of concentrate and water at a first dilution ratio, said first proportioner in fluid communication with said first concentrate outflow port and in fluid communication with a first motive fluid supply wherein motive fluid is provided at a known first flow rate;
• a second proportioner for discharging a mixture of concentrate and water at a second dilution ratio, said second proportioner in fluid communication with said second concentrate outflow port and in fluid communication with a second motive fluid supply wherein motive fluid is provided at a known second flow rate;
• and
• wherein said valve insert is movable to one or more dilution positions wherein at each dilution position one of said first orifices aligns with said first concentrate outflow port or one of said second orifices align with said second outflow port to allow fluid flow from flow chamber into at least one of said outflow ports.