Container filling system and valve for same

A container filling system comprising:

• a beverage product reservoir;
• a beverage container filling valve connected to the reservoir and configured to fill containers with beverage product from the reservoir;
• and
• a vacuum source connected to a fluid space that includes an interior of the reservoir;
• a pressure control valve connecting the fluid space to a source of fluid at a pressure above an ambient atmospheric pressure;
• a pressure transducer configured to generate pressure transducer signals indicative of pressures in a flow path from the reservoir interior to the beverage container filling valve;
• and
• a controller configured to receive input data corresponding to a target pressure value based on a desired flow rate, wherein the controller is configured to receive the pressure transducer signals, and is configured to generate, based on the received pressure transducer signals and on the input data, pressure valve control signals to open and close the pressure valve and maintain a pressure at or near the target pressure.