Dresser, Inc.

Dresser Industries, Inc.

General Electric Company

Mcgraw-edison Company

Kidde-fenwal, Inc.

Baker Hughes Holdings LLC

Robert Claude Prescott

Frederick Wilson Wheeler

Justin Scott Shriver

Larry Gene Schoonover

Donald C Simpson

Howard W Nudd

Philip H Sanford

Robert J Robinson

Brett Alexander Matthews

Joseph Albert Senecal

Xianren Kong

Calman Gold

Eric V Anderson

Justin Shriver

Larry Schoonover

Embodiments of systems and methods that can facilitate data collection for valve diagnostics. The systems can include a valve assembly with a valve and a sampling device that is configured to access a repository with a first buffer and a second buffer. During operation, the valve assembly is configured to read data representing operating variables for the valve into the first buffer. The valve assembly is also configure to determine a quality measure for a first sample set of data from the first buffer, the quality measure indicating the usefulness of the first sample set of data for predicting performance of the valve relative to a second sample set of data from the second buffer. In one embodiment, the valve assembly is further configured to read data from the first buffer into the second buffer in response to the quality measure indicating that the first sample set of data is relatively more useful than the second sample set of data.

System and method for identifying data useful for valve diagnostics

A method to detect cycling of components that result from use of a tight shut-off mode on a valve assembly. Embodiments of the method use operating data from the valve assembly. This operating data includes data that reflects a position for the closure member relative to the seat. This position often corresponds with a measured position of one or more components (e.g., the valve stem) on the valve assembly. In one embodiment, the method includes steps for comparing the measured position to a boundary criteria that defines one or more boundary values proximate, and often equal to, the threshold levels of the tight shut-off mode. The method can also includes steps for identifying patterns in the data that indicate that the closure member is cycling from its closed position to a second position due to tight shut-off mode.

Method for detecting an operating condition on a valve assembly and implementation thereof

A method of performing online diagnostics for a valve includes receiving valve information while the valve is in operation. The valve information includes setpoint data and position data associated with the valve. The method further includes processing the setpoint data and the position data at a plurality of time intervals, and detecting an occurrence of a stick-slip based on the processing.

System and method for detecting a stick-slip

Embodiments of a method and a system, which is configured to implement the method, to process data from one or more valve assemblies found e.g., on a process line. These embodiments can generate a listing that identifies how network/system bandwidth is allocated for the collection of data from the valve assemblies. The embodiments can also process the data to re-arrange the valve assemblies in the listing to better allocate the network/system bandwidth to certain ones of the valve assemblies that require more data to properly assess the operation of the valve assembly. In this way, further diagnostics using the data can identify any changes in operation of the valve assemblies that might be detrimental to the valve assembly and/or the process line in general.

Methods to improve online diagnostics of valve assemblies on a process line and implementation thereof

A computer-implemented method for monitoring characteristic data includes selecting a first operable system device and receiving a first plurality of data from the first operable system device. The first plurality of data represents at least one characteristic of the first operable system device at a first plurality of points in time. The method also includes determining whether the first plurality of data is useful. If the data is useful, the method also includes receiving a second plurality of data from the first operable system device, the second plurality of data represents at least one characteristic of the first operable system device at a second plurality of points in time, wherein the second plurality of points in time is substantially larger than the first plurality of points in time. If the data is not useful, the method further includes selecting a second operable system device.

System for data sampling of control valves using confidence scores

A method and apparatus for testing a fire suppressing system having outlet nozzles from which a high pressure suppressant agent is discharged in which a vessel is attached to each nozzle to capture the agent discharged during a test. The collection vessel is preferably an elongated plastic bag that is rolled to remove air from the bag before agent is discharged into it. The amount of agent captured in a vessel is calculated, such as by weighing. The captured discharged agent is compressed for return to a storage container in which it can be re-pressurized for further use.

Method and pparatus for testing fire suppression systems

A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment around the well so that a magnetic field generated thereby influences the pivotal position of the magnet. Set screws adjustable in the bottom of the well are effective to preset a rest position of the magnet.

Electropneumatic positioner

A transducer having a cross field polarized permanent magnet mounted for slight pivotal movement within an annular coil winding. The magnet comprises neodymium-iron-boron to provide a compact, lightweight, low inertia and high intensity magnetic field. A magnetic field generated by current in the coil winding influences the permanent magnet to pivot slightly about a horizontal axis and rotate a yoke structure to produce a mechanical output of the transducer. In the preferred embodiment of the invention, the yoke is attached to a spring arm for controlling escape gas pressure from a nozzle to thereby control the pressure of a gas stream.

Sensitive electrical to mechanical transducer

A transducer for converting an electrical current signal to a pneumatic pressure. A solid state element such as piezo-electric flapper element 48 is used to vary the pressure drop through a nozzle 46 to provide a controlled pressure supply 28. A micro-power electronic circuit 59 controls the flapper. A solid state pressure sensor 24 detects the output pressure and provides a feedback signal for use in a negative feedback loop to control the flapper element. The flapper element may be triangularly shaped to reduce its responsiveness to relatively low frequency mechanical vibrations. In a exemplary embodiment, where intrinsic safety requirements limit terminal voltages, the flapper element is driven by a transconductance amplifier 94 which is powered through a shunt regulator 82 and a voltage tripler 92. The shunt regulator provides operating potentials which are derived from the signal current.

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Marshfield, MA, United States of America

Robert Claude Prescott