Systems and Methods for Determining Failure in a Back Pressure Balanced Relief Valve
AssigneeEmerson Automation Solutions Final Control US LP
InventorsVishwa Kalyanasundaram, Katherine Si
Life of this patent
Estimating the term…
Abstract
A diaphragm assembly for a pressure relief valve can include a disc guide that is configured to receive a portion of a disc holder, a bonnet adapter, and a diaphragm that is clamped at an outer edge between the disc guide and the bonnet adapter. The diaphragm assembly can be positioned between a bonnet of the pressure relief valve and a valve body of the pressure relief valve to convert the pressure relief valve to a backpressure-balanced pressure relief valve by counterbalancing a backpressure that acts upon the disc holder.
Claims15
A relief valve, comprising:
- a valve body that includes an inlet nozzle and an outlet;
- a disc holder that is configured to move relative to the inlet nozzle to permit or restrict flow from the inlet nozzle to the outlet;
- a bonnet that is coupled to the valve body;
- a spring within the bonnet that applies a force to the disc holder to urge the disc holder toward the inlet nozzle;
- and
- a diaphragm having an aperture through which the disc holder extends, wherein an outer portion of the diaphragm is compressed between the valve body and the bonnet, and wherein the diaphragm is fluidly isolated from an interior of the inlet nozzle when the relief valve is in a closed position.
A diaphragm assembly for a pressure relief valve, comprising:
- a disc guide that is configured to receive a portion of a disc holder;
- a bonnet adapter;
- and
- a diaphragm that is clamped at an outer edge between the disc guide and the bonnet adapter, wherein the diaphragm assembly is configured to be positioned between a bonnet of the pressure relief valve and a valve body of the pressure relief valve to convert the pressure relief valve to a backpressure-balanced pressure relief valve by counterbalancing a backpressure that acts upon the disc holder.
A method for retrofitting a pressure relief valve with a backpressure balancing assembly, the method comprising:
- separating a bonnet portion of the pressure relief valve from a valve body portion of the pressure relief valve;
- installing the backpressure balancing assembly between the bonnet portion and the valve body portion, wherein the backpressure balancing assembly comprises:
- a disc guide that is configured to receive a portion of a disc holder of the pressure relief valve;
- a bonnet adapter;
- and
- a diaphragm that is clamped at an outer edge between the disc guide and the bonnet adapter.
Dependencies are inferred from the claim text.