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Abstract

A dispensing unit for dispensing a liquid under pressure, the dispensing unit comprising a first coupling means for coupling to a liquid container adapted to store the liquid to be dispensed and a propellant gas at a first pressure and a pressure regulating means for generating said first pressure in the liquid container. The pressure regulating means have a second coupling means for coupling to a gas container adapted to store said propellant gas at a second pressure substantially higher than said first pressure and a first fluid communication path for the propellant gas between said gas container and said liquid container. Furthermore a dispensing path for dispensing the liquid from the liquid container and a first operating means for controlling the flow rate of the liquid along the liquid dispensing path during dispensing are provided. The dispensing unit further comprises a second operating means for controlling, during dispensing, the pressure of the liquid container within a range defined by the first pressure and a third pressure lower than the first pressure.

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First Claim