Pressure regulating valve for pressure driven beverage dispensing apparatuses

A beverage dispensing apparatus for dispensing a beverage, said beverage dispensing apparatus comprising:

• a container for receiving a beverage,
• a pressure regulating valve, and
• a gas bottle or cartridge containing a pressurized propellant gas in fluid communication with said pressure regulating valve,
• wherein, the pressure regulating valve comprising:
• a first and a second polymeric shells, the first shell comprising a gas inlet and outlet openings, and the second shell containing a resilient biasing element,
• a polymeric membrane clamped between the first and second shells, thus defining a first and a second chambers sealingly separated by the membrane, the polymeric membrane cooperating with the resilient biasing element and the gas inlet to control a pressure at which said pressurized propellant gas is injected into the container for driving said beverage out of the container, and
• a joint between the first and second polymeric shells, strong enough to withstand the pressures reigning in either chamber and ensuring fluid tightness between the first and second chambers;
• and
• wherein, all polymeric components of said pressure regulating valve are made of the same polymer class.