Pressure regulator

An assembly, comprising:

• a pressure-regulated vessel;
• and
• a pressure regulator, comprising:
• a housing, comprising:
• a first chamber having a first pressure regulating device,
• wherein the first chamber comprises a first fluid inlet and a first fluid outlet;
• wherein the first pressure regulating device comprises:
• a plurality of first levers;
• a first spring having a first spring force;
• wherein the first spring force is configured to provide a first closing force for closing the first fluid inlet;
• a first pressure activated device;
• wherein the first pressure activated device is configured to constrict as an external pressure increases;
• wherein in response to the external pressure increasing, the first pressure activated device is configured to overcome the first closing force and open the first fluid inlet;
• and
• a second chamber having a second pressure regulating device;
• wherein the second chamber comprises a second fluid inlet and a second fluid outlet;
• wherein the second pressure regulating device comprises:
• a plurality of second levers;
• a second spring having a second spring force;
• wherein the second spring force is configured to provide a second closing force for closing the second fluid inlet;
• a second pressure activated device;
• wherein the second pressure activated device is configured to constrict as the external pressure increases;
• wherein in response to the external pressure increasing, the second pressure activated device is configured to overcome the second closing force and open the second fluid inlet.