Adjustable deadband control system
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorJustin L. Masias
Life of this patent
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Abstract
A control system having a first pressure regulator, a downstream fluid control device, first pilot, and second pilot. The first pressure regulator has a fluid inlet, fluid outlet, and actuator assembly with a cavity divided into a first chamber and a second chamber. The downstream fluid control device has a second fluid inlet and a second fluid outlet. The first pilot has a first setpoint and the second pilot has a second setpoint, less than the first setpoint. The first and second pilots fluidly couple the second chamber to the second fluid outlet in a first mode of operation, isolate the second chamber from the second fluid outlet in a second mode of operation, and fluidly couple the second chamber to the fluid inlet in a third mode of operation.
Claims18
A control system, comprising:
- a first pressure regulator comprising a fluid inlet, a fluid outlet, and an actuator assembly, the actuator assembly comprising a cavity and a diaphragm assembly disposed within the cavity and dividing the cavity into a first chamber and a second chamber;
- a downstream fluid control device comprising a second fluid inlet in fluid communication with the fluid outlet of the first pressure regulator and a second fluid outlet in fluid communication with the first chamber of the first pressure regulator;
- a first pilot in direct fluid communication with the second chamber of the actuator assembly and the fluid inlet, the first pilot having a first setpoint;
- a second pilot in direct fluid communication with the second chamber of the actuator assembly, the fluid inlet, and the second fluid outlet, the second pilot having a second setpoint, less than the first setpoint;
- wherein the first pilot and the second pilot are configured to:
- fluidly couple the second chamber to the second fluid outlet with the control system in a first mode of operation;
- isolate the second chamber from the second fluid outlet and the fluid inlet with the control system in a second mode of operation;
- and
- fluidly couple the second chamber to the fluid inlet with the control system in a third mode of operation.
Dependencies are inferred from the claim text.