| 摘要 |
A postmix valve for a beverage dispenser, including a volumetric ratio control device (222) incorporated therein to provide positive ratio control. The device includes a syrup piston (224) and a soda piston (226) linked together, syrup (230) and soda (232) chambers, and valve (208-215) for controlling the flow to and from the chambers. The soda pressure drives the pistons. The valve means preferably includes four solenoid valves (208-211) for the water circuit and four one-way valves (212-215) and a pressure regulator (216) for the syrup circuit. The valve can be used with any of a figal, a bag-in-box, a gravity tank, or a non-returnable container under no pressure or under a low pressure of 5 to 10 psig. |
