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

Claim 13:
14. A valve comprising:
a valve inlet;
a valve outlet;
a restricting element between the valve inlet and the valve outlet, wherein the restricting element comprises a valve stem and a valve disc coupled together;
a valve body defining a pressure chamber and defining a flow path from the valve inlet to the valve outlet;
an inlet pressure line between the valve inlet and the pressure chamber;
an outlet pressure line between the valve outlet and the pressure chamber;
one or more valves in fluid communication with the pressure chamber, wherein the one or more valves are configured to:
enable a liquid having a fluid energy to flow from the valve inlet to the pressure chamber through the inlet pressure line, and
enable the liquid in the pressure chamber to discharge from the pressure chamber to the valve outlet through the outlet pressure line;

a diaphragm configured to position the restricting element using a first portion of the fluid energy; and
an energy accumulator configured to generate stored energy using a second portion of the fluid energy, wherein:
the energy accumulator is configured to establish a gas-fluid interface between the liquid and a gas in the energy accumulator,
the pressure chamber is configured to deliver the first portion of the fluid energy to the diaphragm,
the pressure chamber is configured to deliver the second portion of the fluid energy to the energy accumulator,
the energy accumulator is configured to exert a pressure on the liquid in the pressure chamber using the stored energy, and
the diaphragm is configured to adjust a position of the restricting element when the energy accumulator exerts the pressure on the liquid in the pressure chamber and the pressure chamber is fluidly isolated from the flow path by the one or more valves.