Abstract: Methods and apparatus to diagnose a valve using electric valve actuators are disclosed. An example apparatus includes an electric motor to actuate a valve, rotation sensors to monitor a rotation of a drive shaft associated with the electric motor to determine a distance travelled by the drive shaft, and a valve position sensor to monitor a position of a flow control member of the valve. The example electric valve actuator further includes a processor to generate an alert based on feedback from the rotation sensors and the valve position sensor, the alert associated with a failure of the valve.

Abstract: A clamped bonnet assembly for an axial flow control valve includes a clamped bonnet, a valve seat, and a cage, the cage being clamped directly between the clamped bonnet and the valve seat. The clamped bonnet assembly enhances manufacturability and machinability due to the removability of the clamped bonnet assembly from the control valve body.

Abstract: Self-discharging reserve power units and related methods are described. A self-discharging reserve power unit comprises an electrical energy storage component to provide power to a process control device. The electric energy storage component is coupled to an energy discharge component and a controller, which causes the discharge component to discharge energy from the electrical energy storage component following completion of an operation by the process control device.

Abstract: Self-discharging reserve power units and related methods are described. A self-discharging reserve power unit comprises an electrical energy storage component to provide power to a process control device. The electric energy storage component is coupled to an energy discharge component and a controller, which causes the discharge component to discharge energy from the electrical energy storage component following completion of an operation by the process control device.

Abstract: A clamped bonnet assembly for an axial flow control valve includes a clamped bonnet, a valve seat, and a cage, the cage being clamped directly between the clamped bonnet and the valve seat. The clamped bonnet assembly enhances manufacturability and machinability due to the removability of the clamped bonnet assembly from the control valve body.

Abstract: Methods and apparatus to diagnose a valve using electric valve actuators are disclosed. An example apparatus includes an electric motor to actuate a valve, rotation sensors to monitor a rotation of a drive shaft associated with the electric motor to determine a distance travelled by the drive shaft, and a valve position sensor to monitor a position of a flow control member of the valve. The example electric valve actuator further includes a processor to generate an alert based on feedback from the rotation sensors and the valve position sensor, the alert associated with a failure of the valve.

Abstract: A three-way valve body comprises a throat defining a generally cylindrical throat cavity. At least one flow diverter is carried by the valve body and extends into the throat cavity. The flow diverter advantageously interrupts any circulatory fluid flow within the throat cavity, thereby increasing the efficiency at which fluid flows through the valve body. In one embodiment, the at least one flow diverter can comprise one or more ribs integrally formed with the valve body and disposed parallel to a central axis of the throat cavity.

Abstract: A diaphragm actuator for a fluid process control device comprises a housing, a diaphragm, a stem, and a plate assembly. The plate assembly includes a concave plate and a convex plate, each having inner and outer radial portions. The outer radial portions compressingly engage and retain the diaphragm. The inner radial portions are compressed together onto the stem between a shoulder of the stem and a nut threaded onto the stem. Accordingly, the concave plate forcibly engages and provides a fluid-tight seal directly with the shoulder of the stem without requiring an o-ring or any other additional sealing component. Moreover, the concave and convex plates are structurally equivalent such that the actuator may easily be switched between a biased-open configuration and a biased-closed configuration.

Abstract: A three-way valve body comprises a throat defining a generally cylindrical throat cavity. At least one flow diverter is carried by the valve body and extends into the throat cavity. The flow diverter advantageously interrupts any circulatory fluid flow within the throat cavity, thereby increasing the efficiency at which fluid flows through the valve body. In one embodiment, the at least one flow diverter can comprise one or more ribs integrally formed with the valve body and disposed parallel to a central axis of the throat cavity.

Abstract: A diaphragm actuator for a fluid process control device comprises a housing, a diaphragm, a stem, and a plate assembly. The plate assembly includes a concave plate and a convex plate, each having inner and outer radial portions. The outer radial portions compressingly engage and retain the diaphragm. The inner radial portions are compressed together onto the stem between a shoulder of the stem and a nut threaded onto the stem. Accordingly, the concave plate forcibly engages and provides a fluid-tight seal directly with the shoulder of the stem without requiring an o-ring or any other additional sealing component. Moreover, the concave and convex plates are structurally equivalent such that the actuator may easily be switched between a biased-open configuration and a biased-closed configuration.