Beverage dispenser pump system with pressure control device.

摘要

A post-mix beverage dispenser apparatus comprising a water line (18) connected to a mixing chamber (20) having a dispensing nozzle (22), a concentrate line (30) connected to said mixing chamber, a positive displacement, concentrate metering pump (12) in said concentrate line and having an inlet concentrate line to said pump and an outlet concentrate line from said pump, said pump having check valves (64-67) to control the flow of concentrate therethrough, and means (14) for pressurizing the outlet line from said pump with the pressure of the inlet line to said pump plus an additional pressure.