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 pressure regulator, first pilot, and second pilot. The pressure regulator has a fluid inlet, fluid outlet, and actuator assembly with a cavity divided into a first chamber in fluid communication with the fluid outlet and a second chamber. 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 fluid outlet and isolate the second chamber from the fluid inlet in a first mode of operation, isolate the second chamber from the fluid outlet and fluid inlet in a second mode of operation, and fluidly couple the second chamber to the fluid inlet in a third mode of operation.
Claims14
A control system, comprising:
- a 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, the first chamber in fluid communication with the fluid outlet;
- 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;
- and
- a second pilot in direct fluid communication with the second chamber of the actuator assembly, the fluid inlet, and the fluid outlet, the second pilot having a second setpoint that is less than the first setpoint;
- wherein
- the first pilot and the second pilot are configured to:
- fluidly couple the second chamber to the fluid outlet and isolate the second chamber from the fluid inlet with the control system in a first mode of operation;
- isolate the second chamber from the 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.
A control system, comprising:
- a 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, the first chamber in fluid communication with the fluid outlet;
- a first pilot in fluid communication with the second chamber of the actuator assembly and the fluid inlet, the first pilot having a first setpoint and;
- and
- a second pilot in fluid communication with the second chamber of the actuator assembly, the fluid inlet, and the fluid outlet, the second pilot having a second setpoint that is less than the first setpoint;
- wherein
- the first pilot comprises a first port in fluid communication with the fluid inlet of the pressure regulator, a second port in fluid communication with the second pilot and the second chamber of the pressure regulator, and a third port in fluid communication with the fluid inlet of the pressure regulator and with a diaphragm assembly of the first pilot;
- and
- the first pilot and the second pilot are configured to:
- fluidly couple the second chamber to the fluid outlet and isolate the second chamber from the fluid inlet with the control system in a first mode of operation;
- isolate the second chamber from the 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.