Fluid regulator with improved pressure control

A method of controlling a fluid from a fluid regulator assembly, the method comprising:

• providing the fluid regulator assembly comprising a housing, a first control mechanism within the housing, and a second control mechanism within the housing, wherein the first control mechanism is configured to reduce a fluid pressure of the fluid from an inlet fluid pressure to an intermediate fluid pressure, and wherein the second control mechanism is configured to reduce the fluid pressure of the fluid from the intermediate fluid pressure to an outlet fluid pressure;
• responsive to a failure of the second control mechanism, controlling, by the first control mechanism, the fluid such that the fluid pressure at the outlet of the housing is at the intermediate fluid pressure;
• and
• responsive to a failure of the first control mechanism, closing, by the second control mechanism, the outlet of the housing, wherein the second control mechanism comprises a deformable control element and a balancing diaphragm, wherein the deformable control element is configured to control the fluid acting on the balancing diaphragm.

A fluid regulator assembly for a fluid, the fluid regulator assembly comprising:

• a housing comprising an inlet and an outlet, wherein the housing is configured to receive the fluid having an inlet fluid pressure at the inlet;
• a first control mechanism within the housing configured to control the fluid such that the inlet fluid pressure is reduced to an intermediate fluid pressure;
• and
• a second control mechanism within the housing and configured to control the fluid such that the intermediate fluid pressure is reduced to an outlet fluid pressure,
• wherein, responsive to a failure of the second control mechanism, the first control mechanism is configured to control the fluid such that the fluid at the outlet is at the intermediate fluid pressure, and
• wherein, responsive to a failure of the first control mechanism, the second control mechanism is configured to close the outlet, wherein the second control mechanism comprises a deformable control element and a balancing diaphragm, wherein the deformable control element is configured to control the fluid acting on the balancing diaphragm.