Abstract: Fluid control valves having an adjustable valve stem and piston assembly are described herein. An example fluid control valve includes a piston to control a flow of fluid through a valve body, a bonnet having a threaded bore and a housing to be removably disposed within and threadably coupled to the bonnet. The housing includes a first portion to be disposed in the bonnet, a roller assembly to be pivotally mounted to the first portion, the roller assembly to engage the piston to control a position of the piston. The housing including a second portion with a threaded outer surface to couple to the threaded bore of the bonnet. A valve stem is to move through the housing to control the movement of the roller assembly and the piston.

Abstract: Actuators for use with fluid control devices having multiple fluid flow control members are disclosed. An apparatus includes a housing including a first chamber and a second chamber. The apparatus also includes a first actuator assembly at least partially positioned in the first chamber. The first actuator assembly includes a first stem to be coupled to a first flow control member of a valve. The first flow control member is to control fluid flow through a first flow aperture. The apparatus also includes a second actuator assembly at least partially positioned in the second chamber. The second actuator assembly includes a second stem to be coupled to a second flow control member of the valve. The second flow control member to control fluid flow through a second flow aperture, the first stem independently moveable relative to the second stem.

Abstract: Bonnet apparatus to provide live-loading to a seal are described herein. An example bonnet assembly includes a housing having a recessed opening to define a shoulder and a sealing disc disposed within the recessed opening. A biasing element is disposed in the recessed opening between a flange of the sealing disc and the shoulder of the housing to provide a load to a seal to be disposed between the housing and the fluid device. The biasing element biases the sealing disc away from the housing and the biasing element enables the sealing disc to move within the recessed opening relative to the housing when the bonnet assembly is coupled to the fluid device.

Abstract: Fluid control valves having adjustable valve stem and piston assembly are described herein. An example fluid control valve includes a piston to control a flow of fluid through a valve body, a bonnet with a threaded bore coupled to a bonnet yoke to be coupled to the valve body and a housing having a first portion to pivotally mount a roller assembly to move the piston and a second elongated portion with a threaded outer surface to couple to the threaded bore of the bonnet. A valve stem moves through the housing to control the movement of the piston.

Abstract: Fluid valves having multiple fluid flow control members are described herein. An example valve trim apparatus includes a first flow control member disposed in a passageway of a fluid valve, the first flow control member moves relative to a first orifice of the passageway to provide a first fluid flow characteristic through the passageway. A second flow control member is disposed within the passageway and is to move relative to a second orifice of the passageway defined by the first flow control member when the first flow control member is in sealing engagement with the first orifice to provide a second fluid flow characteristic through the passageway. The first fluid flow characteristic is different than the second fluid flow characteristic.

Abstract: Actuators for use with fluid control devices having multiple fluid flow control members are disclosed. An apparatus includes a housing including a first chamber and a second chamber. The apparatus also includes a first actuator assembly at least partially positioned in the first chamber. The first actuator assembly includes a first stem to be coupled to a first flow control member of a valve. The first flow control member is to control fluid flow through a first flow aperture. The apparatus also includes a second actuator assembly at least partially positioned in the second chamber. The second actuator assembly includes a second stem to be coupled to a second flow control member of the valve. The second flow control member to control fluid flow through a second flow aperture, the first stem independently moveable relative to the second stem.

Abstract: Fluid valves having multiple fluid flow control members are described herein. An example valve trim apparatus includes a first valve trim apparatus to control fluid flow through a first passageway of the fluid valve and a second valve trim apparatus to control fluid flow through a second passageway of the fluid valve. The first passageway is different than the second passageway and the first valve trim apparatus includes a first valve stem to slidably receive a second valve stem of the second valve trim apparatus.

Abstract: Bonnet apparatus to provide live-loading to a seal are described herein. An example bonnet assembly includes a housing having a recessed opening to define a shoulder and a sealing disc disposed within the recessed opening. A biasing element is disposed in the recessed opening between a flange of the sealing disc and the shoulder of the housing to provide a load to a seal to be disposed between the housing and the fluid device. The biasing element biases the sealing disc away from the housing and the biasing element enables the sealing disc to move within the recessed opening relative to the housing when the bonnet assembly is coupled to the fluid device.

Abstract: Pinch valves having a multi-piece valve body to receive flexible tubing are described herein. An example pinch valve includes a first body portion having a first recess and a second body portion having a second recess. The first body portion is movable relative to the second body portion. The first recess and the second recess define a passageway to receive a flexible tubing when the first body portion is coupled to the second body portion and the passageway is to retain the flexible tubing to prevent the flexible tubing from moving relative to the first and second body portions in an axial direction.