Abstract: A valve trim includes a body having a plurality of parallel flow passages extending from a first end of the body to a second end of the body, opposite the first end. Each flow passage includes a throat and an expansion chamber and each throat is nested between the expansion chambers of directly adjacent flow passages.

Abstract: A valve trim assembly configured to be disposed in a fluid flow control valve, including, a valve seat adapted to be disposed in a fluid passageway of the fluid flow control valve. The valve seat includes an annular flange and a seating surface spaced from the annular flange. The valve trim assembly additionally includes a fluid control member movable relative to the valve seat to control fluid flow through the fluid passageway, wherein the fluid control member is movable from a closed position, in which the fluid control member sealingly engages the seating surface of the valve seat, and an open position, in which the fluid control member is spaced from the seating surface, by moving the fluid control member away from the annular flange of the valve seat.

Abstract: A flow control device includes a valve body having an inlet, an outlet, and a flow path connecting the inlet and the outlet. A flow vane is coupled to the valve body and disposed in the flow path to divide a flow of fluid through the valve body. The flow vane has a first surface, a second surface, and a corrugation formed on at least one of the first and second surfaces. A control element is disposed in the flow path and movable in the valve body between an open position and a closed position.

Abstract: A fluid flow control device include a valve body including an inlet, an outlet, and a passageway extending between the inlet and the outlet. A valve trim is at least partially disposed in the passageway of the valve body. The valve trim includes a restrictor having a wall and a plurality of passages extending through the wall. A diffuser is coupled to the restrictor and including a porous body. The porous body is adjacent to the plurality of passages of the restrictor.

Abstract: A valve control assembly includes a valve body having an inlet adapted to be coupled to a source of process fluid having a first temperature, an outlet, and a fluid flow path extending between the inlet and the outlet, and a bonnet coupled to the valve body. An inlet port, an outlet port, an annular plenum, an inlet passage, and an outlet passage are integrally formed in the valve body or the bonnet. The inlet port is adapted to be coupled to source of media and the annular plenum is disposed between the inlet port and the outlet port, immediately adjacent a portion of the fluid flow path. The inlet passage directs the media from the inlet port to the annular plenum, which changes a temperature of the process fluid flowing through the fluid flow path from the first temperature to a second temperature different from the first temperature.

Abstract: A method of servicing a trim cartridge assembly for a valve assembly. The method includes cutting a portion of a bonnet of a trim cartridge assembly and separating the bonnet from a cage of the trim cartridge assembly. The method also includes removing at least one of a retaining ring, a remaining portion of the bonnet, and a spiral wound gasket. The method still further includes replacing the remaining portion of the bonnet with a spacer of a trim cartridge repair kit and disposing a replacement flat sheet gasket of the trim cartridge repair kit at a first end of the spacer. The method also includes disposing a replacement spiral wound gasket of the trim cartridge repair kit at a second end of the spacer opposite the first end of the spacer.

Abstract: A linear feedback travel assembly includes a first tube end, a second tube end, and a longitudinal axis. A drive rod includes a first end and a second end, and a cam includes a first end, a second end, and a wall defining a bore, a first slot, and a second slot. The cam is movable along, and rotatable about, the longitudinal axis. A first pin is movably disposed in the first slot of the cam and is fixed relative to the first tube end. A second pin is movably disposed in the second slot of the cam and connects the drive rod to the cam. When the cam moves along the longitudinal axis, the first pin moves within the first slot and rotates the cam about the longitudinal axis. The second pin rotates the drive rod as the second pin moves within the second slot of the cam.

Abstract: The present disclosure provides a circuit comprising: a 4-20 mA transmitter; a transformer having a primary winding and a secondary winding; a first current-sense resistor connected in series with the primary winding and a current regulator, wherein the current-sense resistor is configured to measure a first voltage and provide the measured first voltage to the current regulator, the current regulator being configured to output a current proportional to the measured first voltage; and a second current-sense resistor connected in series with the secondary winding, wherein the current-sense resistor is configured to measure a second voltage such that a current associated with the 4-20 mA transmitter is determined based on the second voltage.

Abstract: Methods and apparatus to establish secure low energy wireless communications in a process control system are disclosed. An example field device includes a Bluetooth Low Energy (BLE) interface to receive a first initialization message from a remote device over an unpaired BLE connection. The first initialization message includes a plaintext message containing authentication content. The authentication content is generated based on a private authentication token available to the remote device using middleware. The field device also includes a BLE message analyzer to validate the plaintext message based on the authentication content using the authentication token stored by the field device.

Abstract: Methods, apparatus, and articles of manufacture are disclosed. An example pre-amplifier includes a demodulator to combine a chirp signal with an acoustic emission signal to generate a sideband acoustic emission signal, sample spectral data of the sideband acoustic emission signal at an intermediate center frequency in an intermediate frequency bandwidth, and generate demodulated acoustic emission data based on mapping the sampled spectral data to a measurement center frequency, the measurement center frequency different from the intermediate center frequency, and a transmitter to transmit the demodulated acoustic emission data to a computing device.

Abstract: An apparatus for noise reduction in valves is disclosed. A disclosed example valve includes a valve body including a fluid passageway, and a cage located in the fluid passageway, the cage including a wall having openings, a fluid to flow from an inner surface of the wall to an outer surface of the wall through the openings, each of the openings including respective ribs, the ribs to follow a helical path along a length of each opening to cause rotation of the fluid flowing through the openings.

Abstract: Valve body insert apparatus and related methods are described. An example method includes inserting a first sleeve in a drive shaft bore of a valve body. The first sleeve is to line a first inner surface of the drive shaft bore to protect the first inner surface of the drive shaft bore from corrosion or erosion, and the first sleeve defining a first opening to receive a drive shaft. The method includes applying cladding to wetted surfaces of the valve body defining a fluid flow passageway and to at least a portion adjacent a first end of the first sleeve positioned in the fluid flow passageway, where cladding material is not applied to portions of the first inner surface of the drive shaft bore covered by the first sleeve.

Abstract: Techniques for diagnosing failures in a digital solenoid I/P converter are provided herein. A controller of the I/P converter may apply a fixed voltage to an I/P coil of the I/P converter, causing an armature to move from an off-position to an on-position in a properly-functioning I/P converter. The controller may receive an indication of whether a digital logic line trip has occurred, indicating that a current for the I/P coil has reached a desired maximum current level. The controller may remove the fixed voltage applied to the I/P coil when the maximum current level is reached or when a threshold period of time has elapsed from the application of the fixed voltage to the I/P coil. The controller may diagnose, based on whether the digital logic line trip occurred prior to removing the fixed voltage, a failure in the I/P converter.

Abstract: A method of custom manufacturing a fluid pressure reduction device for use in a process control valve. The method includes creating the fluid pressure reduction device using an additive manufacturing technique, which generally includes forming a body and forming a plurality of flow paths in the body. The body has an inner wall and an outer wall spaced radially outward of the inner wall. The flow paths are formed in the body between the inner wall and the outer wall of the body. Each of the flow paths includes an inlet aperture, an outlet aperture, and an intermediate section extending between the inlet and outlet apertures. At least a portion of the intermediate section extends in a substantially vertical direction that is substantially parallel to the longitudinal axis, such that the flow paths are able to utilize previously un-used space in the device.

Abstract: Methods and apparatus to identify additively manufactured parts are disclosed. An example apparatus includes a body, formed of layers layered substantially parallel to a base layer, composed of a first material having a first density, a first indicium embedded internally in the body as a void, and a second indicium on an external surface of the body, the second indicium aligning with the first indicium.

Abstract: Methods and apparatus for pressure-based direct measurement of a final control element variable are disclosed. An example method includes receiving a signal from a first sensor mounted on a shaft of a valve, converting the signal to a pressure, routing the pressure to a second sensor of a controller operatively coupled to a pneumatic actuator, the pneumatic actuator operatively coupled to the shaft, and determining, by the controller, a first torque on the shaft based on the pressure.

Abstract: Systems and techniques for accessing and controlling field devices to collect data and convert protocols are disclosed herein. An example system to access a field device includes one or more processors, a transmitter, a wireless network interface controller, and a memory storing instructions that, when executed, may cause the field communicator device to retrieve process parameter data encoded in a field device transmission protocol. The field communicator device may retrieve the process parameter data at a plurality of time intervals from a field device, and the process parameter data may correspond to a process parameter for the field device. The field communicator device may also store at least some of the process parameter data, analyze the process parameter data over the plurality of time intervals to identify a condition of the field device, and transmit an indication of the condition of the field device to a remote device.

Abstract: The example methods and apparatus reduce and/or eliminate adverse effects of welding work pieces having dissimilar compositions. An example method includes depositing a first weld layer on a first end of a first work piece. The first work piece has a first content of a metallic element and the first weld layer has a second content of the metallic element higher than the first content. The example method includes depositing a second weld layer between the first weld layer and a second end of a second work piece to couple the first work piece to the second work piece. The second weld layer has a third content of the metallic element higher than the second content, and the second work piece has a fourth content of the metallic element higher than the first content.

Abstract: Flow control seals are disclosed. A disclosed example seal for use with a valve includes an annular body defining an interior channel, and a closed body disposed within and covering a portion of the interior channel of the annular body, the closed body including an aperture extending therethrough to change a flow direction of fluid as the valve is opened.

Abstract: Spray heads for use with desuperheaters and desuperheaters including such spray heads. In accordance with an example, a spray head for a desuperheater includes a main body having a first end portion arranged for attachment to a flow line, a second end portion, and a passage that extends between the first end portion and the second end portion and defines an entrance port. The passage being adapted for connection to a source of fluid. The main body includes an outer portion having an irregular external shape and including a spray nozzle having an exit opening defined by the outer portion. A flow passage is coupled between the entrance port and the spray nozzle.