Abstract: An electronic regulator includes an inlet valve coupled to an inlet port, the inlet port configured to receive a supply pressure, and an exhaust valve coupled to an exhaust port, the exhaust port configured to release a pilot pressure when the exhaust valve is open. The electronic regulator also includes a pilot pressure output pneumatically coupled to the inlet valve and exhaust valve and configured to be coupled to an external process control device to provide the pilot pressure to the external process control device. A setpoint input coupled to both the inlet valve and the exhaust valve receives a setpoint signal indicative of a setpoint value, and the electronic regulator operates the inlet valve and the exhaust valve to control the pilot pressure according to the setpoint value. Further, the electronic regulator includes a vent valve coupled to a venting port and pneumatically coupled to the pilot pressure output.

Abstract: Temperature-controlled pressure regulators are described. An example temperature-controlled pressure regulator described herein includes a regulator body having a process fluid inlet fluidly coupled to a process fluid outlet via a first passageway and a heat transfer medium inlet to be fluidly coupled to a heat transfer medium outlet via a second passageway, where the heat transfer medium inlet is integrally formed with the regulator body. A heat chamber body is removably coupled to the regulator body to form a chamber between the heat transfer medium inlet and the heat transfer medium outlet. At least a portion of the first passageway is disposed within the chamber, and the chamber is to receive a heat transfer medium via the heat transfer medium inlet to provide heat to the process fluid as the process fluid flows through the chamber via the first passageway, which separates the process fluid from the heat transfer medium.

Abstract: Temperature-controlled pressure regulators are described. An example method for controlling temperature-controlled pressure regulator includes receiving an input signal indicative of a value representative of a temperature setpoint, where the input signal is within an operating temperature range. The method includes regulating a heat output of a heat source via a control signal based on the received input signal, measuring a temperature of the heat source, comparing the temperature of the heat source to a first threshold, and modifying the control signal to the heat source when the measured temperature is greater than the first threshold, where the first threshold is greater than an upper limit of the operating temperature range.

Abstract: Fail-safe apparatus for use with fluid valves are disclosed herein. An example fail-safe apparatus includes a first piston, a second piston movably coupled relative to the first piston, and a fluid chamber between the first and second pistons to receive a control fluid. The control fluid is to operatively couple the first and second pistons when the control fluid is provided in the fluid chamber. The first piston is operatively decoupled from the second piston when at least some of the control fluid is removed from the fluid chamber.

Abstract: Apparatus to visually indicate a leak from a relief valve are disclosed. In one example, an apparatus is disclosed that includes a pipe plug having a head and a shaft. The pipe plug is to attach to a relief valve. An opening is to extend through the head and shaft. The apparatus also includes a first flexible membrane to cover an end of the opening. In some examples, the first flexible membrane is to expand when fluid is released via the relief valve into the opening of the pipe plug.

Abstract: An electronic regulator includes an inlet valve coupled to an inlet port, the inlet port configured to receive a supply pressure, and an exhaust valve coupled to an exhaust port, the exhaust port configured to release a pilot pressure when the exhaust valve is open. The electronic regulator also includes a pilot pressure output pneumatically coupled to the inlet valve and exhaust valve and configured to be coupled to an external process control device to provide the pilot pressure to the external process control device. A setpoint input coupled to both the inlet valve and the exhaust valve receives a setpoint signal indicative of a setpoint value, and the electronic regulator operates the inlet valve and the exhaust valve to control the pilot pressure according to the setpoint value. Further, the electronic regulator includes a vent valve coupled to a venting port and pneumatically coupled to the pilot pressure output.

Abstract: Mounting assemblies for use with fluid control devices are disclosed. An example apparatus includes a bonnet to be coupled to a valve and a mounting assembly including a first side to be coupled to an actuator and a second side to be rotatably coupled at an end of the bonnet to enable a rotational position of the mounting assembly to change relative to the bonnet.

Abstract: Temperature-controlled pressure regulators are described. An example temperature-controlled pressure regulator described herein includes a regulator body having an inlet fluidly coupled to an outlet via a first passageway. A heat block is disposed within the regulator body and receives at least a portion of the first passageway. The heat block is to provide heat to the process fluid as the process fluid flows through the heat block via the first passageway, which separates the process fluid from the heat block.

Abstract: In-line pressure regulators are described. An example in-line pressure regulator includes a body having threads to threadingly engage a port of another pressure regulator. The body defines an inlet, an aperture, and a seating surface. Additionally, the example in-line pressure regulator includes a piston assembly operatively coupled to a valve plug. The piston assembly is slidably movable relative to the body to move the valve plug relative to the aperture and the seating surface to control a flow of fluid between the inlet and the other regulator. Additionally, the piston assembly is to slidably and sealingly engage a surface of the port of the other pressure regulator.

Abstract: Temperature-controlled pressure regulators are described. An example temperature-controlled pressure regulator described herein includes a regulator body having an inlet fluidly coupled to an outlet via a first passageway. A heat block is disposed within the regulator body and receives at least a portion of the first passageway. The heat block is to provide heat to the process fluid as the process fluid flows through the heat block via the first passageway, which separates the process fluid from the heat block.

Abstract: Temperature-controlled pressure regulators are described. An example temperature-controlled pressure regulator described herein includes a regulator body having a process fluid inlet fluidly coupled to a process fluid outlet via a first passageway and a heat transfer medium inlet to be fluidly coupled to a heat transfer medium outlet via a second passageway, where the heat transfer medium inlet is integrally formed with the regulator body. A heat chamber body is removably coupled to the regulator body to form a chamber between the heat transfer medium inlet and the heat transfer medium outlet. At least a portion of the first passageway is disposed within the chamber, and the chamber is to receive a heat transfer medium via the heat transfer medium inlet to provide heat to the process fluid as the process fluid flows through the chamber via the first passageway, which separates the process fluid from the heat transfer medium.

Abstract: Adjustable in-line fluid regulators are described. One described example fluid regulator includes a body having a fluid inlet and a fluid outlet. The example regulator also includes a first fluid regulator having a valve to control the flow of fluid from the inlet to the outlet, a piston coupled to the valve via a stem, wherein the piston is to receive a pressure associated with the outlet. The first fluid valve also includes a spring plate movable along a longitudinal axis of the stem, a spring disposed between the piston and the spring plate, and an adjuster engaged with the body to move the spring plate to change a compression of the spring and a regulated outlet pressure of the fluid regulator.