摘要 |
Pressure regulating valve for controlling the pressure at which a pressurized propellant gas is injected into a container containing a liquid for driving said liquid out of the container, said valve comprising: •A first and a second polymeric shells (2), (3), the first shell (2) comprising a gas inlet (5) and outlet (4) openings, and the second shell (3) containing means (7) for resiliency biasing, •a polymeric membrane (9) clamped between the first and second shells (2), (3), thus defining a first and a second chambers sealingly separated by the membrane, •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 two chambers; characterized in that, all polymeric components (2), (3), (9) of said pressure regulating valve are made of the same polymer class. |