FIELD: apparatuses for mixing gases. SUBSTANCE: regulator controls gas pressure supplied from gas source to pressure regulating devices, so that optimum pressure value for dispensing beverage from reservoir is provided. Simultaneously regulator controls gas flow from gas source in the direction of pressure regulating devices. Gas is supplied from gas source through pipeline into chamber and displaces diaphragm. As a result valve body is separated from receptacle to provide flow of gas from chamber into chamber and further into pipeline. Gas supplied from source through pipeline is delivered into chamber and through pipeline into chamber to deflect diaphragm. As a result gas flows through pipeline into cylinder and further into chamber. EFFECT: enhanced reliability in operation. 7 cl, 2 dwg
