Patent ID: 11953098
Assignee: ADEMCO INC.
Field: Control (Instruments)
Classification: CPC F  G | IPC F

Claim 17:
18. A method comprising:
holding, using a valve, a liquid in a pressure chamber defined by the valve, wherein the valve includes an energy accumulator configured to exert a pressure on the liquid held in the pressure chamber, wherein the energy accumulator is configured to establish a gas-fluid interface between the liquid and a gas in the energy accumulator;
determining, using control circuitry, a sensed pressure based on a signal from a pressure sensor comparing, using the control circuitry, the sensed pressure and a pressure setpoint;
altering, using the control circuitry, the pressure exerted on the liquid held within the pressure chamber based on the comparison of the sensed pressure and the pressure setpoint by:
increasing the pressure exerted on the liquid held within the pressure chamber by causing, using the control circuitry, a pressurizing valve to enable a flow of liquid to flow to the pressure chamber; and
decreasing the pressure exerted on the liquid held within the pressure chamber by causing, using the control circuitry, a venting valve to enable at least some portion of the liquid held within the pressure chamber to discharge from the pressure chamber; and

adjusting, using a diaphragm of the valve, the position of a restricting element of the valve when the energy accumulator exerts the pressure on the liquid held in the pressure chamber and the pressurizing valve and the venting valve fluidly isolate the pressure chamber from a flow path defined by the valve, wherein the diaphragm is configured to move the restricting element based on a pressure of a fluid in the flow path, wherein the restricting element comprises a valve stem and a valve disc coupled together.