Fluid dispensing system and dual-mode, system fluid actuated valve for use therein

A fluid dispensing system comprising:

• a first flow path carrying a first fluid;
• a second flow path carrying a second fluid;
• and
• a valve in fluid communication with said first and second flow paths, said valve comprising:
• a valve body;
• an intermediate wall within said valve body and defining within said valve body a flow chamber and an actuation chamber isolated from fluid communication with one another, said flow chamber defining a dispensing fluid flow path carrying said second fluid therethrough, and said actuation chamber being in fluid communication with said first flow path;
• a flexible diaphragm positioned within said actuation chamber, said flexible diaphragm defining a vacuum pressure actuation zone and a positive pressure actuation zone isolated from fluid communication with one another;
• a dispensing fluid inlet port and dispensing fluid outlet port, each enabling fluid communication between said second flow path and said flow chamber;
• and
• a valve plunger slidably mounted within said intermediate wall, said valve plunger being movable from a closed position in which fluid communication between said dispensing fluid inlet port and said dispensing fluid outlet port is disabled, to an open position in which fluid communication between said dispensing fluid inlet port and said dispensing fluid outlet port is enabled.

A fluid dispensing system comprising:

• a first flow path carrying a first fluid;
• a second flow path carrying a second fluid;
• and
• a valve in fluid communication with said first and second flow paths, said valve further comprising:
• a valve body;
• a dispensing fluid inlet port in said valve body and in fluid communication with said second flow path;
• a dispensing fluid outlet port in said valve body and in fluid communication with said second flow path;
• an actuation fluid inlet port in said valve body and in fluid communication with said first flow path;
• an actuation fluid outlet port in said valve body and in fluid communication with said first flow path;
• and
• an actuation fluid vacuum port in said valve body and in fluid communication with said first flow path.