Intelligent pressure regulator
AssigneeFisher Controls International LLC
InventorsPaul R. Adams, Karl J. Gabel, Daniel G. Roper
Life of this patent
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Abstract
An intelligent pressure regulator for maintaining a fluid in a process at a predetermined pressure includes an electronic controller which enhances regulator performance and provides self-diagnostics and communications capabilities. The electronic controller includes a pressure sensor which provides a signal indicating the pressure of the fluid being controlled, an adjusting pressure for adjusting the position of a throttling element; and a PID controller which receives the signal indicating the pressure of the fluid being controlled and applies the adjusting pressure to the actuator in response to the signal.
Claims20
A pressure regulator for controlling the pressure of a process fluid comprising:
- a body defining a fluid inlet, a fluid outlet, and a fluid flow passage between the inlet and the outlet;
- a throttling element moveable within the flow passage;
- an actuator coupled to the throttling element for selectively moving the throttling element to control fluid flow through the flow passage;
- a reference load coupled to the actuator to bias the throttling element in a predetermined reference position;
- a feedback for applying the process fluid to the actuator to position the throttling element, wherein the actuator and the feedback are configured to position the throttling element so as to block fluid flow through the flow passage in response to a predetermined pressure of the process fluid upstream of the regulator;
- and
- an electronic controller that applies a force to the actuator to further position the throttling element in response to a process variable.
Dependencies are inferred from the claim text.