Abstract: A temperature-controlled pressure regulator assembly includes a regulator having a regulator body, a valve seat, an inlet, an outlet, and defines a flow passage connecting the inlet and the outlet. A control element controls the device, a portion of the flow passage extends through a heat chamber, and a heater is positioned to heat the chamber thereby conveying heat to a fluid in the flow passage. A controller is electrically coupled to the heater and is coupled to a power source. A thermal cut-off fuse is coupled to a control circuit, with the thermal cut-off fuse arranged to electrically decouple the heater from the control circuit in response to a temperature exceeding a threshold, thereby deactivating the heater. The thermal cut-off fuse is disposed in a circular fuse holder and positioned adjacent the heater and adjacent a longitudinal center of the heat chamber.

Abstract: An electro-pneumatic controller includes a base portion having at least one lateral surface and a plurality of passageways disposed through the base portion. A bore extends through the lateral surface, and the bore has a counterbore portion and a threaded engagement portion. A standard NPT plug may be coupled to the base portion, and the plug has a head portion and an engagement portion that threadedly engages the engagement portion of the bore. A top surface of the head portion of the plug is coplanar with the lateral surface of the base portion or is disposed within the counterbore portion of the bore.

Abstract: A temperature-controlled pressure regulator assembly includes a regulator having a regulator body, a valve seat, an inlet, an outlet, and defines a flow passage connecting the inlet and the outlet. A control element controls the device, a portion of the flow passage extends through a heat chamber, and a heater is positioned to heat the chamber thereby conveying heat to a fluid in the flow passage. A controller is electrically coupled to the heater and is coupled to a power source. A thermal cut-off fuse is coupled to a control circuit, with the thermal cut-off fuse arranged to electrically decouple the heater from the control circuit in response to a temperature exceeding a threshold, thereby deactivating the heater. The thermal cut-off fuse is disposed in a circular fuse holder and positioned adjacent the heater and adjacent a longitudinal center of the heat chamber.

Abstract: An electro-pneumatic controller includes a base having a body, a top surface, and a bore formed within the body; a cover coupled to the base, the cover having an open end with a rim, the rim contacting the top surface of the base; a plurality of fluid flow paths formed within the base; and at least one flame arrestor disposed within one of the fluid flow paths.

Abstract: A system for providing a force on a main valve member includes a first sensing element adapted to couple to a portion of the main valve member. A first loading element may be directly or indirectly coupled to the first sensing element such that the first loading element provides a first force on the first sensing element. The first loading element is adapted to transfer the first force to the first sensing element and the main valve member. The system also includes a second sensing element to the first sensing element. A second loading element is coupled to the second sensing element and the first sensing element. The second loading element is adapted to provide a second force on the second sensing element to transfer the second force to the main valve member.

Abstract: An electro-pneumatic controller for use with a regulator. The electro-pneumatic controller includes a base having a body, a top surface, and a bore formed within the body. A locking mechanism is disposed within the bore of the body of the base, the locking mechanism having a top surface flush with the top surface of the base. A cover is coupled to the base and includes an open end with a rim, the rim contacting the top surface of the base and a portion of the top surface of the locking mechanism. The locking mechanism is rotated via a tool in a counter-clockwise direction after the cover contacts a portion of the top surface of the locking mechanism to lock the cover to the base.

Abstract: An electro-pneumatic controller adapted to use a non-inert fluid as a control fluid includes a base portion and a cap portion removeably secured to the base portion. A non-intrinsically-safe process may be disposed within an interior of the cap portion. A plurality of passageways may be disposed through the base portion. The electro-pneumatic controller may also include a flameproof barrier assembly which may include a plurality of flameproof joints each disposed within desired portion of the plurality of passageways. The plurality of flameproof joints cooperate to at least partially define a first zone, the flameproof joints adapted to prevent or to limit the spread of an open fire or explosion that might occur due to the ignition of the non-inert control fluid.

Abstract: A tool for inserting a flame arrestor assembly into a process control device having a first passageway of a first depth and a second passageway of a second depth different from the first depth. The tool includes a head portion having a first diameter, and a tip portion having a second diameter less than the first diameter. The tip portion has a first portion, a second portion, and a third portion, the first and second portions being separated by a first notch, and the second and third portions being separated by a second notch. The first notch is arranged to indicate when the flame arrestor assembly is fully inserted into the first passageway, and the second notch is arranged to indicate when the flame arrestor assembly is fully inserted into the second passageway.

Abstract: An electro-pneumatic controller includes a base having a body, a top surface, and a bore formed within the body; a cover coupled to the base, the cover having an open end with a rim, the rim contacting the top surface of the base; a plurality of fluid flow paths formed within the base; and at least one flame arrestor disposed within one of the fluid flow paths.

Abstract: A system for providing a force on a main valve member includes a first sensing element adapted to couple to a portion of the main valve member. A first loading element may be directly or indirectly coupled to the first sensing element such that the first loading element provides a first force on the first sensing element. The first loading element is adapted to transfer the first force to the first sensing element and the main valve member. The system also includes a second sensing element to the first sensing element. A second loading element is coupled to the second sensing element and the first sensing element. The second loading element is adapted to provide a second force on the second sensing element to transfer the second force to the main valve member.

Abstract: A fluid regulating unit includes a body, a pressure regulator, and a control valve. The body has an inlet, an outlet configured to output a regulated flow of fluid, and a flow path defined between the inlet and the outlet. The body integrates a pressure regulator and a control valve, each of which is disposed in the flow path. The pressure regulator has a regulator body, a control assembly configured to control a fluid flow through the regulator body, a sensor operatively coupled to the control assembly to control a position of the control element, and a bonnet movably coupled to the regulator body. The regulator body and the bonnet define a reference chamber disposed in the flow path. The reference chamber is configured to apply a reference force to the sensor to control the fluid flow through the regulator body.

Abstract: A control assembly for a valve includes a stem displaceable relative to a body portion of the valve from a closed position in which a valve portion of the stem portion engages a valve seat portion to an open position in which the valve portion is offset from the valve seat portion. A portion of the stem portion is movably disposed within the flow orifice. The control assembly further includes a connector portion, and a connector bore is formed in a bottom surface of the connector portion. A first end of the stem portion is disposed within the connecter bore of the connector portion.

Abstract: A tool for inserting a flame arrestor assembly into a process control device having a first passageway of a first depth and a second passageway of a second depth different from the first depth. The tool includes a head portion having a first diameter, and a tip portion having a second diameter less than the first diameter. The tip portion has a first portion, a second portion, and a third portion, the first and second portions being separated by a first notch, and the second and third portions being separated by a second notch. The first notch is arranged to indicate when the flame arrestor assembly is fully inserted into the first passageway, and the second notch is arranged to indicate when the flame arrestor assembly is fully inserted into the second passageway.

Abstract: An electro-pneumatic controller adapted to use a non-inert fluid as a control fluid includes a base portion and a cap portion removeably secured to the base portion. A non-intrinsically-safe process may be disposed within an interior of the cap portion. A plurality of passageways may be disposed through the base portion. The electro-pneumatic controller may also include a flameproof barrier assembly which may include a plurality of flameproof joints each disposed within desired portion of the plurality of passageways. The plurality of flameproof joints cooperate to at least partially define a first zone, the flameproof joints adapted to prevent or to limit the spread of an open fire or explosion that might occur due to the ignition of the non-inert control fluid.

Abstract: An electro-pneumatic controller includes a base portion having at least one lateral surface and a plurality of passageways disposed through the base portion. A bore extends through the lateral surface, and the bore has a counterbore portion and a threaded engagement portion. A standard NPT plug may be coupled to the base portion, and the plug has a head portion and an engagement portion that threadedly engages the engagement portion of the bore. A top surface of the head portion of the plug is coplanar with the lateral surface of the base portion or is disposed within the counterbore portion of the bore.

Abstract: A flame arrestor assembly configured to extinguish a flame propagating between a process control device and a combustible environment outside the process control device. The flame arrestor assembly includes a flame arrestor and a retaining element. The flame arrestor has a body adapted to be disposed within a fluid flow passageway of the process control device. The retaining element is adapted to be disposed within the fluid flow passageway of the process control device proximate to the flame arrestor, and is configured to securely retain the flame arrestor within the fluid flow passageway of the process control device.

Abstract: An electro-pneumatic controller for use with a regulator. The electro-pneumatic controller includes a base having a body, a top surface, and a bore formed within the body. A locking mechanism is disposed within the bore of the body of the base, the locking mechanism having a top surface flush with the top surface of the base. A cover is coupled to the base and includes an open end with a rim, the rim contacting the top surface of the base and a portion of the top surface of the locking mechanism. The locking mechanism is rotated via a tool in a counter-clockwise direction after the cover contacts a portion of the top surface of the locking mechanism to lock the cover to the base.

Abstract: A fluid regulating unit includes a body, a pressure regulator, and a control valve. The body has an inlet, an outlet configured to output a regulated flow of fluid, and a flow path defined between the inlet and the outlet. The body integrates a pressure regulator and a control valve, each of which is disposed in the flow path. The pressure regulator has a regulator body, a control assembly configured to control a fluid flow through the regulator body, a sensor operatively coupled to the control assembly to control a position of the control element, and a bonnet movably coupled to the regulator body. The regulator body and the bonnet define a reference chamber disposed in the flow path. The reference chamber is configured to apply a reference force to the sensor to control the fluid flow through the regulator body.