Bonnet and trim assembly and related methods

Abstract

A bonnet and trim assembly and related methods are described. An example bonnet and trim assembly includes a bonnet configured to be coupled to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining a body has a bonnet mounting interface to couple to a cage mounting interface of the bonnet. A retainer retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. When the retainer is coupled to the cage and the bonnet, the retainer enables axial movement between the cage and the bonnet.

Description

Technical Field

[0001] The present disclosure relates generally to fluid valves and, more particularly, to bonnet and trim assemblies and related methods. Background Art

[0002] Control valves are commonly used in industrial processes, such as, for example, oil and gas pipeline distribution systems and chemical processing plants, to control the flow of process fluids. Control valves typically employ valve trim including a cage to control the fluid flow characteristics of the valve. Summary of the invention

[0003] An example bonnet and valve trim assembly includes a bonnet configured to be coupled to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining a body has a bonnet mounting interface to couple to a cage mounting interface of the bonnet. A retainer retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. When the retainer is coupled to the cage and the bonnet, the retainer enables axial movement between the cage and the bonnet.

[0004] In another example, an example bonnet and valve trim assembly includes a bonnet having a plurality of first protrusions radially spaced relative to a longitudinal axis of the bonnet. A cage has a plurality of second protrusions radially spaced relative to the longitudinal axis of the cage. When the cage is coupled to the bonnet, the first protrusions intermesh with the second protrusions. A fastener is used to couple the first protrusions and the second protrusions to retain the cage coupled to the bonnet.

[0005] In yet another example, an example method includes obtaining a bonnet having a cage mounting flange; obtaining a cage having the bonnet mounting flange; and coupling the bonnet and the cage via a retainer by inserting the retainer into a passage defined by the cage mounting flange and the bonnet mounting flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a perspective view of an example control valve having a bonnet and trim assembly according to the teachings of the present disclosure.

[0007] Figure 2 yes Figure 1 Exploded view of an example control valve.

[0008] Figure 3 yes Figure 1 to Figure 2 A perspective view of an example cartridge holder of an example valve cover and valve trim assembly.

[0009] Figure 4 yes Figures 1 to 3 A partial front view of an example bonnet of an example bonnet and valve trim assembly.

[0010] Figure 5 yes Figure 4A partial perspective view of an example valve cover.

[0011] Figure 6 yes Figures 1 to 3 A partial perspective view of an example cage of an example bonnet and valve trim assembly.

[0012] Figure 7 yes Figures 1 to 6 A partial cross-sectional view of an example bonnet and trim assembly.

[0013] Figure 8 yes Figures 1 to 7 A top cross-sectional perspective view of an example bonnet and trim assembly.

[0014] Fig. 9 yes Figure 8 2 is a top cross-sectional view of an example bonnet and trim assembly.

[0015] Fig.10 yes Fig. 9 FIG. 1 is a top cross-sectional view of an example bonnet and trim assembly of FIG. 1 , but illustrating an example retainer of an example bonnet and trim assembly disclosed herein.

[0016] Fig.11 yes Figure 1 and Figure 2 A cross-sectional view of an example control valve.

[0017] Fig.12 yes Fig.11 An enlarged partial cross-sectional view of an example bonnet and valve trim assembly is shown in FIG.

[0018] Fig.13 yes Fig.11 An enlarged partial cross-sectional view of an example bonnet and trim assembly illustrating an example retainer in an example second position. DETAILED DESCRIPTION

[0019] Control valves use valve trims to provide a variety of fluid flow characteristics. Different valve trims can be selected to affect the way the control valve capacity changes as the valve's flow control member moves through a full stroke or travel. Therefore, different valve trims can be used to meet a variety of control application requirements and / or flow characteristics.

[0020] Conventional control valves include a plurality of valve trim components that are individually inserted into the valve body during the valve assembly process. Examples of such valve trim components may include seat rings, seat ring gaskets, valve cages, valve plugs, spiral wound gaskets, shim gaskets, valve cover gaskets and valve covers, and other valve trim components. The proper loading and / or assembly of such individual valve trim components is a complex process that may cause manufacturing and / or assembly complexity or concerns, particularly when a relatively large number of valve trim components are to be inserted and assembled into the valve body. For example, tolerance stacking must be considered during the manufacture of the valve trim components and their subsequent assembly to ensure that the valve trim components are properly fitted into the assembled control valve and / or properly positioned in the assembled control valve. Proper alignment of the valve trim parts is required to ensure that the valve plug is properly seated in the seat ring, thereby achieving the shutoff of the fluid flow through the valve. Furthermore, each valve trim component is a serviceable component that may require repair and / or replacement when a component fails. Therefore, as the number of valve trim components assembled into the valve body increases, the likelihood that at least one serviceable component of the valve will require repair during the service life of the valve also increases. Additionally, different valve trim arrangements are often required to achieve different fluid flow characteristics, which increases manufacturing and / or assembly costs. For example, a technician must disassemble the valve and reassemble using different valve trim components to achieve different flow characteristics.

[0021] The example bonnet and trim assembly and related methods disclosed herein facilitate assembly, disassembly and / or serviceability of a fluid valve. The example bonnet and trim assembly disclosed herein includes a bonnet, a cage and a valve seat, which are coupled together via a bonnet / cage interface. In some examples, the bonnet and trim assembly and related methods disclosed herein provide an example cartridge to facilitate the removal and / or coupling of the bonnet and trim assembly disclosed herein with a valve body of a fluid valve. In other words, the bonnet and trim assembly disclosed herein provides a cartridge that enables the trim assembly (e.g., a trim component) to be removed and / or coupled with the valve body substantially simultaneously. For example, the bonnet and trim assembly disclosed herein can be coupled to the valve body as a single unit or assembly. Additionally, the example bonnet / cage interface disclosed herein can be configured to enable axial movement (e.g., expansion and / or contraction) in a longitudinal direction (e.g., in a stroke direction) to account for thermal expansion during operation. For example, some example valve trim cartridges disclosed herein employ an enlarged opening (eg, an oval opening) and / or a spring or gasket (eg, a spiral wound gasket) that allows for thermal expansion between the cage and the bonnet.

[0022] Figure 11 is a perspective view of an example fluid valve 100 having a bonnet and valve trim assembly 102 constructed according to the teachings of the present invention. The illustrated example fluid valve 100 can be used in various industrial processes (e.g., petrochemical applications, subsea applications, paper and pulp applications, etc.), high pressure differential and / or temperature applications, and / or any other application requiring fluid flow control. The illustrated example bonnet and valve trim assembly 102 is coupled to a valve body 104 of the fluid valve 100. An actuator is coupled to the valve body 104 via the bonnet and valve trim assembly 102 to control the flow of fluid through a fluid flow passage 106 between an inlet 108 and an outlet 110 of the valve body 104. The actuator can be a pneumatic actuator (e.g., a diaphragm, a piston), a bellows actuator, an electric actuator, and / or any other actuator.

[0023] Figure 2 yes Figure 1 1 is an exploded view of a fluid valve 100. The bonnet and trim assembly 102 of the illustrated example includes a bonnet 202 and a trim assembly 204. The trim assembly 204 of the illustrated example includes a cage 206, a flow control member 208 (e.g., a valve plug), a valve stem 210, and a valve seat 212. The valve seat 212 of the illustrated example is formed as a single-piece (e.g., integral) structure with the cage 206. However, in some examples, the valve seat 212 can be removably coupled to the cage 206 and / or can be coupled to the cage 206 and / or the bonnet 202 via one or more fasteners, retaining rings, clamps, etc. The trim assembly 204 of the illustrated example includes a cage / valve body seal 214, a cage / bonnet seal 216, and a bonnet / valve body seal 218. However, in some examples, the valve trim assembly 204 does not include a cage / valve body seal 214, a cage / valve bonnet seal 216, and / or a bonnet / valve body seal 218. The cage / valve body seal 214, the cage / valve bonnet seal 216, and / or the bonnet / valve body seal 218 may be a spring seal, an O-ring, a gasket, a spiral wound gasket, and / or any other seal. The cage / valve body seal 214 provides a seal between the cage 206 (e.g., the outer surface of the valve seat 212) and the valve body 104, the cage / valve bonnet seal 216 provides a seal between the cage 206 and the valve bonnet 202, and the bonnet / valve body seal 218 provides a seal between the valve bonnet 202 and the valve body 104.

[0024] The valve cover 202 of the illustrated example includes a valve stem opening 219 and a mounting flange 220. The valve stem opening 219 receives (e.g., slidably receives) the valve stem 210, and the mounting flange 220 couples (e.g., attaches) the valve cover 202 and the valve body 104. The valve mounting flange 220 has an aperture 222 to receive a corresponding fastener 226 (e.g., a shaft of a stud) supported by the valve body 104. In some examples, the valve cover 202 can include the fastener 226, and the valve body 104 can include the aperture 224.

[0025] The valve stem 210 has a first end 210a attached to the flow control member 208 and a second end 210b, which protrudes from the valve cover 202 to couple (e.g., attach) to an actuator to move the flow control member 208 relative to the valve seat 212. For example, the valve cage 206 defines a central hole 228 to slidably receive the flow control member 208. Specifically, the flow control member 208 slides relative to the valve seat 212 within the central hole 228 of the valve cage 206 to control the flow of fluid through the fluid flow passage 106. The central hole 228 extends between the first end 206a of the valve cage 206 and the second end 206b of the valve cage 206 opposite to the first end 206a. The valve cage 206 of the illustrated example has a cylindrical body. The valve cage 206 includes a plurality of openings 232 (e.g., windows or passages) through a side surface 230 of the valve cage 206, and the openings are radially spaced relative to the longitudinal axis 234.

[0026] In order to hold the bonnet and trim assembly 102 as a unit (e.g., a subassembly), the bonnet and trim assembly 102 of the illustrated example includes a retainer assembly 236. The retainer assembly 236 of the illustrated example includes a retainer interface 238 and a retainer 240. The retainer interface 238 is defined by the bonnet 202 and the cage 206, and the retainer 240 is coupled (e.g., attached or secured) to the retainer interface 238 to couple the bonnet 202 and the cage 206. The retainer interface 238 of the illustrated example includes a cage mounting interface 242 and a bonnet mounting interface 244. Specifically, the cage mounting interface 242 is carried by the bonnet 202, and the bonnet mounting interface 244 is carried by the cage 206.

[0027] The valve body 104 includes a valve body bore 246 to receive the valve trim assembly 204. The valve body bore 246 has a longitudinal axis that is non-parallel (e.g., perpendicular) to the inlet 108 and / or outlet 110 of the valve body 104. In other words, the valve body bore 246 is aligned (e.g., coaxially aligned) with the longitudinal axis 234 of the valve stem 210 and the valve stem opening 219 of the valve cover 202. As such, when coupled to the valve body 104, the valve cover 202 positions the valve trim assembly 204 in the fluid flow passage 106 via the valve body bore 246. The valve cover and valve trim assembly 102 are coupled to the valve body 104 by aligning the fasteners 226 with the corresponding orifices 222 in the orifices 222. Because the trim assembly 204 is retained to the bonnet 202 via the retainer assembly 236, coupling the bonnet 202 to the valve body 104 positions the trim assembly 204 (e.g., the cage 206, the valve seat 212, and / or the flow control member 208) in the fluid flow passage 106 of the valve body 104 (e.g., via the valve body bore 246). After the bonnet 202 is coupled to the valve body 104, fasteners passing through the apertures 222 of the mounting flange 220 of the bonnet 202 can apply torque via the nuts 248 to apply or adjust (e.g., increase or decrease) a load or clamp on the cage 206 and the valve seat 212 when the cage 206 and the valve seat 212 are positioned in the fluid flow passage 106.

[0028] Figure 3 yes Figure 1 and Figure 2 102. As noted above, the bonnet and trim assembly 102 define or form a cartridge holder 300 (e.g., a subassembly) to facilitate removal and / or assembly of the trim assembly 204 and the valve body 104. The cartridge holder 300 of the illustrated example includes the bonnet 202, the cage 206, the flow control member 208, the valve stem 210, the valve seat 212, the cage / valve body seal 214 ( Figure 2 ), cage / bonnet seal 216, bonnet / body seal 218, and retainer assembly 236. In some examples, the cartridge holder 300 of the illustrated example may include other components of the valve trim assembly.

[0029] The retainer assembly 236 retains the valve trim assembly 204 and the valve cover 202 (e.g., as a subassembly). For example, the retainer 240 of the retainer assembly 236 interacts with (e.g., is fastened to) the retainer interface 238 to couple the valve trim assembly 204 and the valve cover 202. Specifically, the retainer 240 is attached to or combined with the valve cage mounting interface 242 and the valve cover mounting interface 244 to (e.g., permanently, temporarily) attach the valve cover 202 and the valve cage 206. The retainer 240 of the illustrated example includes a first retainer 302 and a second retainer 304, which are coupled to the retainer interface 238 to attach the valve cage 206 and the valve cover 202. For example, the retainer interface 238 (eg, the cage mounting interface 242 and / or the bonnet mounting interface 244 ) defines a first opening 306 that receives the first retainer 302 and a second opening 308 that receives the second retainer 304 .

[0030] refer to Figure 1 and Figure 2 To assemble the cartridge holder 300, the first end 210a of the valve stem 210 is attached to the flow control member 208, which is slidably positioned in the central bore 228 of the cage 206. The cage / bonnet seal 216 is positioned adjacent the bonnet mounting interface 244 ( Figure 2 ). The second end 210b of the valve stem 210 is positioned through the valve stem opening 219 of the valve bonnet 202 so that the valve bonnet mounting interface 244 of the valve cage 206 moves toward and engages with the valve cage mounting interface 242 of the valve bonnet 202. For example, the valve bonnet mounting interface 244 can be coupled to the valve cage mounting interface 242 via direct engagement, interlocking engagement, friction engagement, etc. When the valve cage mounting interface 242 is aligned with the valve bonnet mounting interface 244, the first retainer 302 is disposed (e.g., inserted) in the first opening 306 defined by the retainer interface 238, and the second retainer 304 is disposed (e.g., inserted) in the second opening 308 defined by the retainer interface 238. The retainer 240 (e.g., the first retainer 302 and / or the second retainer 304) retains the cage 206, the flow control member 208, the valve stem 210, and the cage / valve cover seal 216 coupled (e.g., attached) to the valve cover 202. The second end 210b of the valve stem 210 protrudes from the valve cover 202 and is configured to be attached to an actuator.

[0031] Figure 4 yes Figures 1 to 3 The valve cover 202 of the illustrated example includes a valve cover body 402 (eg, defining a valve stem opening 219 ( Figure 2 , Figure 5) to receive the cylindrical body of the valve stem 210), the mounting flange 220, and the cage mounting interface 242. The bonnet body 402 protrudes from a first surface 404 (e.g., an upper surface) of the mounting flange 220 in a first direction 406 away from the mounting flange 220, and the cage mounting interface 242 of the illustrated example protrudes from a second surface 408 (e.g., a lower surface) of the mounting flange 220 in a second direction 410 away from the mounting flange 220 opposite to the first direction 406. In other words, the mounting flange 220 is located between the bonnet body 402 and the cage mounting interface 242. The cage mounting interface 242 of the illustrated example has an interface body 412 that includes a stepped profile defining a first outer wall 414a (e.g., a first annular wall) and a second outer wall 414b (e.g., a second annular wall) that form a sealing seat 416 (e.g., an annular wall) therebetween. For example, the diameter of the second outer wall 414b is smaller than the diameter of the first outer wall 414a. When the bonnet 202 is coupled to the cage 206, the seal seat 416 receives (e.g., compresses) the cage / bonnet seal 216. The second outer wall 414b of the cage mounting interface 242 defines the first opening 306 and the second opening 308 to receive the first retainer 302 and the second retainer 304, respectively.

[0032] In some examples, the bonnet 202 and / or the cage mounting interface 242 can be manufactured or formed via an additive manufacturing process (e.g., 3D printing), casting, injection molding, machining, and / or any other suitable manufacturing process and / or any combination thereof. One or more example additive manufacturing processes include, but are not limited to, direct metal laser sintering (DMLS), laser freeform manufacturing technology (LFMT), selective laser melting (SLM), fused deposition modeling (FDM), laser puddle deposition (LPD), small puddle deposition (SPD), laser powder bed (LPB), electron beam powder bed (EBPD), indirect power bed (IPD), laser deposition technology (LDT), laser repair technology (LRT), laser cladding technology (LCT), laser deposition welding (LDW), laser deposition welding with integrated milling (LDWM), selective laser sintering (SLS), direct metal printing (DMP), and / or stereolithography (SLA) and / or any combination thereof.

[0033] In some examples, the bonnet 202 and the cage mounting interface 242 can be formed as a single piece. In some examples, the bonnet 202 and the cage mounting interface 242 can be manufactured as separate pieces that are coupled or joined together after being formed via fasteners, welding, clamps, and / or any other suitable fasteners. For example, the bonnet body 402 and the mounting flange 220 can be manufactured via casting and / or machining, and the cage mounting interface 242 can be manufactured via additive manufacturing (e.g., 3D printing). The bonnet body 402 and the cage mounting interface 242 can be coupled via fasteners, welding, and / or any other suitable fasteners.

[0034] Figure 5 yes Figure 4 2 is a bottom perspective view of the bonnet 202. The interface body 412 of the cage mounting interface 242 includes an internal opening 500 that communicates with the stem opening 219 of the bonnet body 402 of the bonnet 202. The cage mounting interface 242 (e.g., in the internal opening 500 of the interface body 412) forms a first key 502 of the retainer assembly 236. The first key 502 of the illustrated example is defined by a plurality of first protrusions 504 radially spaced relative to the longitudinal axis 234. The first protrusions 504 are formed on an inner surface 506 of the interface body 412 that defines the internal opening 500. To form the first protrusions 504, the interface body 412 includes a plurality of notches 508. In other words, the first protrusions 504 protrude from the inner surface 506 of the interface body 412 defined by the notches 508 toward the longitudinal axis 234. The first protrusions 504 and the notches 508 are formed in an alternating pattern. The cage mounting interface 242 of the illustrated example has four first protrusions 504 and four notches 508. However, in some examples, the cage mounting interface 242 can have any number of first protrusions 504 and / or notches 508 (e.g., more than four first protrusions 504 and / or notches 508, or less than four first protrusions 504 and / or notches 508). Additionally, the first protrusion 504 has an arcuate shape or a curved shape. For example, the innermost edge 510 of the first protrusion 504 forms an arcuate segment of a first circle 512a. The inner surface 506 is defined by the notches 508 forming an arcuate segment of a second circle 512b. The diameter of the first circle 512a is smaller than the diameter of the second circle 512b. In some examples, the first protrusion 504 and / or the innermost edge 510 can have a non-arcuate shape (e.g., a straight profile, etc.) and / or any other shape. In some examples, the cage mounting interface 242 includes a single protrusion (eg, extending halfway around the perimeter of the cage mounting interface 242 ) to define the first key 502 .

[0035] Figure 6 yes Figures 1 to 32 is a partial perspective view of a cage 206 of the embodiment shown in FIG. The cage 206 of the embodiment shown in FIG. defines a cage body 600 that defines a central bore 228 and a bonnet mounting interface 244 adjacent to a first end 206a of the cage 206. The bonnet mounting interface 244 of the embodiment shown in FIG. defines a second key 602 of the retainer assembly 236 (e.g., adjacent to the first end 206a). The second key 602 is formed adjacent to the first end 206a of the cage 206 and is oriented (e.g., extends) in a direction away from the first end 206a. The second key 602 of the embodiment shown in FIG. is defined by a plurality of second protrusions 604 radially spaced relative to the longitudinal axis 234. To form the second protrusions 604, the cage 206 includes a plurality of notches 606. The second protrusions 604 and the notches 606 of the embodiment shown in FIG. are formed in an alternating pattern around the periphery of the cage body 600. The bonnet mounting interface 244 of the embodiment shown in FIG. has four second protrusions 604 and four notches 606. However, in some examples, the bonnet mounting interface 244 can have any number of second protrusions 604 and / or indentations 606 (e.g., more than four second protrusions 604 and / or indentations 606, or less than four second protrusions 604 and / or indentations 606). Additionally, the second protrusion 604 has an arcuate shape or a curved shape. For example, the innermost edge 608a forms an arcuate segment of the first circle 610a, and the outermost edge 608b of the second protrusion 604 forms an arcuate segment of the second circle 610b. The diameter of the first circle 610a is smaller than the diameter of the second circle 610b. In some examples, the second protrusion 604 and / or the outermost edge 608b can have a non-arcuate shape (e.g., a straight profile, etc.) and / or any other shape. The cage body 600 and the bonnet mounting interface 244 of the illustrated example form a stepped profile to define a sealing seat 612 that receives the cage / bonnet seal 216. In some examples, the bonnet mounting interface 244 includes a single protrusion (eg, extending halfway around the perimeter of the bonnet mounting interface 244 ) to define the second key 602 .

[0036] The cage body 600 and / or the bonnet mounting interface 244 may be manufactured or formed via an additive manufacturing process (e.g., 3D printing), casting, injection molding, machining, and / or any other suitable manufacturing process and / or any combination thereof. One or more example additive manufacturing processes include, but are not limited to, direct metal laser sintering (DMLS), laser freeform manufacturing technology (LFMT), selective laser melting (SLM), fused deposition modeling (FDM), laser pile deposition (LPD), small pile deposition (SPD), laser powder bed (LPB), electron beam powder bed (EBPD), indirect power bed (IPD), laser deposition technology (LDT), laser repair technology (LRT), laser cladding technology (LCT), laser deposition welding (LDW), laser deposition welding with integrated milling (LDWM), selective laser sintering (SLS), direct metal printing (DMP), and / or stereolithography (SLA), and / or any combination thereof.

[0037] In some examples, the cage body 600 and the bonnet mounting interface 244 can be formed as a single piece. In some examples, the cage body 600 and the bonnet mounting interface 244 can be manufactured as separate pieces that are coupled or joined after being formed via fasteners, welding, clamps, and / or any other suitable fasteners. For example, the cage body 600 can be manufactured via casting and / or machining, and the bonnet mounting interface 244 can be manufactured via additive manufacturing (e.g., 3D printing). The cage body 600 and the bonnet mounting interface 244 can be coupled via fasteners, welding, and / or any other suitable fasteners.

[0038] Figure 7 yes Figures 1 to 3 102. For clarity, Figure 7 2 and 3. The flow control member 208 and the valve stem 210 are omitted. When the cage 206 is coupled to the bonnet 202, the cage mounting interface 242 is coupled (e.g., interacts) with the bonnet mounting interface 244. For example, the first key 502 and the second key 602 are interlaced or engaged with each other to couple the bonnet 202 and the cage 206. Specifically, the notch 508 of the cage mounting interface 242 receives a corresponding protrusion in the second protrusion 604 of the bonnet mounting interface 244, and the notch 606 of the bonnet mounting interface 244 receives the first protrusion 504 of the cage mounting interface 242. The retainer 240 retains the cage mounting interface 242 and the bonnet mounting interface 244 to couple the cage 206 and the bonnet 202. In order to receive the retainer 240, the retainer assembly 236 includes a passage 700. Specifically, the passage 700 of the illustrated example includes a first passage 702 for receiving the first retainer 302 and a second passage 704 for receiving the second retainer 304.

[0039] The cage / bonnet seal 216 is captured between the cage 206 and the bonnet 202. The cage / bonnet seal 216 of the illustrated example is a spiral wound gasket that expands and / or contracts in a linear direction 706 along the longitudinal axis 234. The retainer assembly 236 enables the cage 206 to move axially relative to the bonnet 202 in the linear direction 706. For example, the cage / bonnet seal 216 and / or the retainer assembly 236 enable the cage 206 to move axially relative to the bonnet 202 due to thermal expansion during operation (e.g., of the cage 206 or the bonnet mounting interface 244 and / or the bonnet 202 or the cage mounting interface 242). In some examples, when the trim assembly 204 is positioned in the valve body 104, the cage / bonnet seal 216 and / or the retainer assembly 236 enable the cage 206 to move relative to the bonnet 202 to accommodate manufacturing tolerances (e.g., stack-up tolerances). In order to enable the cage 206 to move relative to the valve cover 202, the passage 700 of the illustrated example has an elliptical cross-sectional shape or an oval cross-sectional shape (eg, a non-circular shape), and Fig.12 and Fig.13 A more detailed description is given in .

[0040] Figure 8 is taken through the retainer assembly 236 Figures 1 to 7 1. A cross-sectional perspective view of the bonnet and trim assembly 102 of FIG. 1. When the cage 206 is coupled to the bonnet 202, the first protrusions 504 and the second protrusions 604 are positioned in an alternating pattern and form a circle. For example, the first protrusions 504 are positioned in the corresponding notches 606 ( Figure 6 ) or received by these corresponding notches 606, and the second protrusion 604 is positioned in the corresponding notches 508 ( Figure 5 ) or are received by these corresponding notches 508, so that corresponding ones of the first protrusions 504 are positioned between corresponding ones of the second protrusions 604, and corresponding ones of the second protrusions 604 are positioned between corresponding first protrusions of the first protrusions 504. In this example, no gap is formed between adjacent first protrusions 504 and second protrusions 604. For example, the first protrusions 504 include corresponding lateral edges 802, and the second protrusions 604 include corresponding lateral edges 804. Figure 8As shown, the lateral edge 802 of the corresponding one of the first protrusions 504 engages (e.g., directly engages or contacts) the lateral edge 804 of the adjacent second protrusion 604. Likewise, the lateral edge 804 of the corresponding one of the second protrusions 604 engages (e.g., directly engages or contacts) the lateral edge 802 of the adjacent first protrusion 504. In other words, when the cage 206 is coupled to the bonnet 202, the first protrusions 504 and the second protrusions 604 are interlaced with each other. In the illustrated example, the first protrusions 504 and the second protrusions 604 are interlaced with each other to form a ring. Additionally, the central hole 228 of the cage 206 has a uniform continuous circular shape between the first end and the second end of the cage body 600. In this example, the inner surface 510 of the first protrusion 504 and the inner surface 608a of the second protrusion 604 define the inner surface 806 of the central hole 228 of the cage 206. In other words, when the first protrusion 504 engages the second protrusion 604, the inner surface 510 and the inner surface 608a form a smooth continuous inner surface 806. In other words, when the cage 206 is coupled to the bonnet 202, the inner surface 510 and the inner surface 608a define a ring. For example, the diameter of the first circle 610a is substantially similar to Figure 5 The diameter of the first circle 512a is substantially similar to (e.g., equal to or between 0.1% and 5%). Figure 5 In other words, when the flow control member 208 moves between the open position and the closed position relative to the valve seat 212, the first protrusion 504 and / or the second protrusion 604 do not change the cylindrical shape of the central hole and / or do not interfere with the operation of the flow control member 208.

[0041] Fig. 9 yes Figure 8 . In the illustrated example, at least a portion of the first protrusion 504 and / or the second protrusion 604 includes a retainer aperture 900 to define a passage 700. The first passage 702 of the illustrated example has a first end 902a and a second end 902b. The first end 902a defines a first opening 306 formed on an outer surface of the cage mounting interface 242. The second passage 704 has a first end 904a and a second end 904b. The first end 904a defines a second opening 308 formed on an outer surface of the cage mounting interface 242. The second passage 704 of the illustrated example is a mirror image of the first passage 702.

[0042] The first protrusion 504 of the illustrated example includes a first protrusion 906a, a second protrusion 906b, a third protrusion 906c, and a fourth protrusion 906d, and the second protrusion 604 of the illustrated example includes a fifth protrusion 908a, a sixth protrusion 908b, a seventh protrusion 908c, and an eighth protrusion 908d. For example, at least a portion of the first protrusion 906a and the second protrusion 906b and at least a portion of the sixth protrusion 908b and the seventh protrusion 908c define the first passage 702. At least a portion of the third protrusion 906c and the fourth protrusion 906d and at least a portion of the seventh protrusion 908c and the eighth protrusion 908d define the second passage 704.

[0043] To form the first passage 702, the first protrusion 906a of the illustrated example includes a first aperture 910, the sixth protrusion 908b includes a second aperture 912, the second protrusion 906b includes a third aperture 914, and the seventh protrusion 908c includes a fourth aperture 916. The first aperture 910 extends through a portion of the first protrusion 906a (e.g., between the lateral edges 802 of the first protrusion 906a), and the second outer wall 414b of the cage mounting interface 242 includes a fifth aperture 918 that is communicatively coupled to the first opening 306 and the first aperture 910 of the first protrusion 906a. The second aperture 912 is an arcuate opening or passage that extends (e.g., completely) between the lateral edges 804 of the sixth protrusion 908b. Thus, the second aperture 912 follows the arcuate profile or shape of the sixth protrusion 908b. Likewise, the third orifice 914 is an arcuate opening or passage extending between the lateral edges 802 of the second protrusion 906b. Thus, the third orifice 914 follows the arcuate profile or shape of the second protrusion 906b. The fourth orifice 916 extends partially within the seventh protrusion 908c. In other words, the fourth orifice 916 (e.g., unlike the second orifice 912 and the third orifice 914) does not extend completely through the lateral edges 804 of the seventh protrusion 908c. The first orifice 910, the fourth orifice 916, and the fifth orifice 918 each have a substantially straight (e.g., linear) shape.

[0044] Likewise, to form the second passage 704, the third protrusion 906c of the illustrated example includes a sixth orifice 920, the eighth protrusion 908d includes a seventh orifice 922, the fourth protrusion 906d includes an eighth orifice 924, and the seventh protrusion 908c includes a ninth orifice 926. The sixth orifice 920 extends through a portion of the third protrusion 906c (e.g., between the lateral edges 802 of the third protrusion 906c) and the second outer wall 414b of the cage mounting interface 242 includes a tenth orifice 928 that couples the second opening 308 with the sixth orifice 920 of the third protrusion 906c. The seventh orifice 922 is an arcuate opening or passage that extends (e.g., completely) between the lateral edges 804 of the eighth protrusion 908d. Thus, the seventh orifice 922 follows the arcuate profile or shape of the eighth protrusion 908d. Likewise, the eighth orifice 924 is an arcuate opening or passage extending between the lateral edges 802 of the fourth protrusion 906d. Thus, the eighth orifice 924 follows the arcuate profile or shape of the fourth protrusion 906d. The ninth orifice 926 extends partially within the seventh protrusion 908c. In other words, the ninth orifice 926 (e.g., unlike the seventh orifice 922 and the eighth orifice 924) does not extend completely through the lateral edges 804 of the seventh protrusion 908c. The sixth orifice 920, the ninth orifice 926, and the tenth orifice 928 each have a substantially straight (e.g., linear) shape.

[0045] When the first protrusion 504 is interlocked with the second protrusion 604, the first aperture 910 is aligned with the second aperture 912, the second aperture 912 is aligned with the third aperture 914, and the third aperture is aligned with the fourth aperture 916. In other words, the second aperture 912 is located between and couples the first aperture 910 and the third aperture 914, and the third aperture 914 is located between and couples the second aperture 912 and the fourth aperture 916. Similarly, the sixth aperture 920 is aligned with the seventh aperture 922, the seventh aperture 922 is aligned with the eighth aperture 924, and the eighth aperture 924 is aligned with the ninth aperture 926. In other words, the seventh aperture 922 is located between and couples the sixth aperture 920 and the eighth aperture 924, and the eighth aperture 924 is located between and couples the seventh aperture 922 and the ninth aperture 926.

[0046] To properly align the holes 910 to 928, the retainer assembly 236 of the illustrated example includes a third key 930 (e.g., an orientation key). The third key 930 of the illustrated example is provided by a fifth protrusion 908a and / or a notch 932 located between the first opening 306 and the second opening 308. Specifically, the fifth protrusion 908a of the illustrated example does not include a retainer aperture (e.g., retainer aperture 900). To align the apertures 910 to 928, the fifth protrusion 908a is oriented toward the first opening 306 and the second opening 308. For example, to align the retainer aperture 900, the fifth protrusion 908a is located within a notch 932 of the cage mounting interface 242 formed between the first opening 306 and the second opening 308. Thus, the third key 930 facilitates assembly of the cage 206 and the bonnet 202 and / or orientation of the cage 206 relative to the bonnet 202. In some examples, the fifth protrusion 908 a and the notch 932 can have different sizes (eg, larger sizes) relative to the other protrusions 906 a - 906 d and 908 b - 908 d to facilitate proper orientation of the cage 206 relative to the bonnet 202 to align the retainer aperture 900 .

[0047] In some examples, passageway 700 forms a single continuous passageway between first opening 306 and second opening 308. In some such examples, retainer 240 includes a single continuous retainer wire received by the single continuous passageway. In some such examples, bonnet and trim assembly 102 includes only first opening 306 to receive the single continuous retainer wire.

[0048] Fig.10 yes Figure 8 700, but shows the retainer 240 coupled to the passage 700. Specifically, the retainer 240 is attached to or engages the valve cage mounting interface 242 and the valve cover mounting interface 244 to (e.g., permanently, temporarily) attach the valve cover 202 and the valve cage 206. In other words, when the orifices 910 to 918 ( Fig. 9 ) (eg, by the third key 930 ( Fig. 9 ) promotes), the passage 700 can receive the retainer 240.

[0049] In the illustrated example, the first retainer 302 is located in the first passage 702. The first retainer 302 of the illustrated example extends between the first end 902a and the second end 902b of the first passage 702. For example, the first retainer 302 has a first end 1002 and a second end 1004. The first end 1002 is positioned adjacent to the first end 902a of the first passage 702, and the second end 1004 is positioned adjacent to the second end 902b of the first passage 702. The apertures 912 to 918 ( Fig. 9) guides the first retainer 302 in the first passage 702. The first retainer 302 is flexible and can conform to the shape of the first passage 702 defined by the holes 912 to 918 (e.g., bend or flex). The first end 1002 can be cut after the first retainer 302 (e.g., wire) is inserted or positioned in the first passage 702.

[0050] In the illustrated example, the second retainer 304 is located in the second passage 704. The second retainer 304 of the illustrated example extends between the first end 904a and the second end 904b of the second passage 704. For example, the second retainer 304 has a first end 1006 and a second end 1008. The first end 1006 is positioned adjacent to the first end 904a of the second passage 704, while the second end 1008 is positioned adjacent to the second end 904b of the second passage 704. The apertures 922 to 928 ( Fig. 9 ) guides the second retainer 304 in the second passage 704. The second retainer 304 is flexible and can conform to the shape of the second passage 704 defined by the apertures 922 to 928 (e.g., bend or flex). The first end 1006 can be cut after the second retainer 304 (e.g., wire) is inserted or positioned in the second passage 704.

[0051] The first retainer 302 and the second retainer 304 retain the cage 206 coupled to the bonnet 202. The first retainer 302 and the second retainer 304 may be permanently or temporarily coupled to the cage 206 and the bonnet 202. In some examples, a weld may be provided to cover (e.g., enclose) the first opening 306 and / or the second opening 308 to enclose (e.g., capture) the first retainer 302 in the first passage 702 and / or the second retainer 304 in the second passage 704.

[0052] Fig.11 yes Figure 1 1. A cross-sectional view of a fluid valve 100 is shown. In order to couple the valve trim assembly 204 within the fluid flow passage 106 of the valve body 104, the cartridge holder 300 is coupled to the valve body 104. In other words, the valve trim assembly 204 can be coupled to and / or removed from the valve body 104 as an integral structure when the valve cover 202 is coupled to and / or removed from the valve body 104 (e.g., together or simultaneously).

[0053] like Figure 3As noted, the assembled cartridge holder 300 is a pre-assembled unit (e.g., a subassembly) that is removed and / or coupled to the valve body 104 as an integral unit. To assemble the cartridge holder 300, the first end 1102 of the valve stem 210 is attached (e.g., fastened, welded, screwed, etc.) to the flow control member 208. The piston seal 1104, piston ring 1106, and piston ring retainer 1108 are coupled to the flow control member 208, and the flow control member 208 is positioned in the central bore 228 of the cage 206. The cage / bonnet seal 216 is then positioned on the sealing seat 610 defined by the cage 206. The second end 1110 of the valve stem 210 is positioned in the stem bore 219 of the bonnet 202. The cage 206 is then oriented (e.g., rotated if necessary) to align the fifth protrusion 908a and the notch 932 of the third key 930 (see FIG. 2 ). Fig. 9 ), and the cage 206 moves toward the bonnet 202 so that the bonnet mounting interface 244 engages with the cage mounting interface 242. In other words, the second protrusion 604 engages with a corresponding notch in the other notches 508 (where the fifth protrusion 908a engages with the notch 932), and the first protrusion 504 engages with a corresponding notch in the notches 606. With the passage 700 aligned, the retainer 240 is inserted into the passage 700 to retain (e.g., couple, attach, or fasten) the cage 206 and the bonnet 202. The bonnet 202 is then coupled to the cage 206 via the retainer 240. The second end 1110 of the valve stem 210 protrudes from the stem hole 219 of the bonnet 202 and may be configured to engage an actuator. The packing assembly 1112 is located in the packing hole 1114 of the bonnet 202. The packing assembly 1112 includes one or more packing seals 1116 that prevent or restrict fluid from leaking into the environment through the valve stem hole 219. The packing assembly 1112 includes a packing adjuster 1118, a packing follower 1120, and a biasing element 1122 (e.g., a wave spring pack) to adjust or change (e.g., increase or decrease) the packing force on the packing seal 1116. A bearing 1124 and / or a bushing 1126 may be included in the valve stem hole 219 to align the valve stem 210 (e.g., relative to the vertical direction) and / or facilitate movement of the valve stem 210 relative to the valve cover 202 in the linear direction 706. The valve cover / valve body seal 218 is then coupled to the valve cover 202, and the valve cage / valve body seal 214 is coupled to the valve cage 206 via an adhesive.

[0054] Alternatively, the packing assembly 1112, the bushing 1126, and / or the bearing 1124 may be coupled to the cartridge holder 300 after the bonnet 202 is coupled to the valve body 104. In some examples, the bonnet / valve body seal 218 and / or the cage / valve body seal 214 are not part of the cartridge holder 300 and may be coupled to the valve body 104 before the cartridge holder 300 is coupled to the valve body 104.

[0055] After assembling the cartridge holder 300, the valve cover 202 is attached to the valve body 104. The valve cover 202 is removably coupled to the valve body 104 via fasteners 226 (e.g., bolts and / or threaded fasteners) and nuts 248. When the valve cover 202 and / or more generally the valve cover and valve trim assembly 102 are coupled to the valve body 104 (e.g., as Fig.11 ), the cage 206 and the integral valve seat 212 of the valve trim assembly 204 are located in the valve body bore 246 (e.g., the fluid flow passage 106) of the valve body 104 so that the cage 206 engages the first annular wall 1128 (e.g., the shoulder or stepped surface) of the valve body 104. The cage / valve body seal 214 is located between the first annular wall 1128 and the cage 206 to prevent the process fluid from leaking between the cage 206 (e.g., the outer surface of the cage 206 and / or the valve seat 212) and the valve body 104. In some examples, the cage / valve body seal 214 can be a spring-loaded seal and / or a spring-energized seal. In other examples, the cage / valve body seal 214 can be a metal C-shaped seal or other types of resilient metal seals. The bonnet / valve body seal 218 is located between the second annular wall 1113 (eg, shoulder or stepped surface) of the valve body 104 and the bonnet 202 , and prevents or restricts fluid between the bonnet 202 and the valve body 104 from leaking through the valve body bore 246 .

[0056] When coupled to the valve body 104, the cage 206 is located between the bonnet 202 and the first annular wall 1128. The force (e.g., clamping force) applied to the cage can be adjusted via the nut 248. Specifically, the cage mounting interface 242 applies force to the cage / bonnet seal 216, which applies force to the cage 206. Fig.12 and Fig.13 As described in greater detail, the cage / bonnet seal 216 is a spring seal that allows the cage 206 to move relative to the bonnet 202, and the retainer assembly 236 enables the cage 206 to move relative to the bonnet 202 in a linear direction 706 to accommodate thermal expansion and / or manufacturing tolerances.

[0057] When the bonnet 202 is coupled to the valve body 104, the bonnet and valve trim assembly 102 positions the valve trim assembly 204 in the fluid flow passage 106 such that the valve seat 212 defines an orifice 1130 of the fluid flow passage 106. To control fluid flow through the orifice 1130, the actuator moves the flow control element 208 in the closed position 1132 (e.g., as Fig.11The cage 206 moves between a fully closed position (shown in FIG. 1 ) in which the flow control member 208 sealingly engages a sealing surface 1134 (e.g., a lip) of the valve seat 212 to prevent fluid from flowing through the fluid flow passage 106, and a second or open position in which the flow control member 208 is disengaged from the sealing surface 1134 of the valve seat 212 to allow fluid to flow through the fluid flow passage 106 via the orifice 1130. The cage 206 guides the flow control member 208 (e.g., a valve plug) as the flow control member moves between the open and closed positions 1132.

[0058] In the open position, the illustrated example valve trim assembly 204 enables fluid to flow through the fluid flow passage 106 between the inlet 108 and the outlet 110. Specifically, the fluid flows through one or more windows or openings 232 provided by the valve cage 206, which fluidly couple the inlet 108 and the outlet 110. The openings 232 of the valve cage 206 affect the fluid flow to provide fluid flow characteristics to the fluid flowing through the fluid flow passage 106. The flow characteristics provided by the illustrated example valve cage 206 are based on the size and / or geometry of the openings 232 (e.g., the flow path through the openings 232). The flow characteristics can be, for example, a linear flow characteristic, an equal percentage flow characteristic, and / or any other fluid flow characteristics. For example, the valve trim assembly 204 disclosed herein can provide an equal percentage flow characteristic. To provide a linear flow feature or any other fluid flow feature to the fluid valve 100, the cartridge holder 300 can be removed from the valve body 104 and another cartridge holder (e.g., substantially similar to the cartridge holder 300) can be coupled to the valve body 104, the other cartridge holder having a cage with a different opening (e.g., having radially spaced, differently sized and / or differently shaped orifices or passages around a periphery of the cage that are different from the opening 232). The cartridge holder 300 facilitates disassembly (e.g., removal) of the valve trim assembly 204 from the valve body 104 and / or assembly (e.g., attachment) of the valve trim assembly to the valve body 104.

[0059] Fig.12 yes Fig.11, which shows the retainer assembly 236 in a first position 1200. As noted above, the retainer assembly 236 enables linear movement along the longitudinal axis 234. In order to enable the valve cage 206 to move in a linear direction along the longitudinal axis 234 relative to the valve cover 202, the passage 700 has a passage opening 1202, which has an oval or elliptical cross-sectional shape. The retainers 240 (e.g., the first retainer 302 and the second retainer 304) have a circular cross-sectional shape. In other words, the diameter of the retainer 240 is smaller than the size of the passage opening 1202 of the passage 700 so that the retainer 240 can be bi-directionally moved in the passage 700. For example, the retainer 240 can be moved along the longitudinal axis of the passage 700 (see Fig. 9 ) and a second direction that is not parallel to (e.g., perpendicular to) the longitudinal axis of the passage 700. The passage opening 1202 of the passage 700 has a first end 1204 (e.g., an upper end) and a second end 1206 (e.g., a lower end), which respectively define a first travel limit (e.g., in a linear direction) of the cage 206 relative to the valve cover 202 and a second travel limit (e.g., in a linear direction) of the cage 206 relative to the valve cover 202. To allow the cage 206 to move relative to the valve cover 202, the second protrusion 604 of the illustrated example has a protrusion length 1208 that is less than a notch length 1210 of the notch 508 of the cage mounting interface 242. For example, a difference 1212 between the notch length 1210 and the protrusion length 1208 is substantially equal to or greater than an opening length 1214 between the first end 1204 and the second end 1206 of the passage 700. Additionally, the cage / bonnet seal 216 is an elastomeric seal that flexes to allow the cage 206 to move relative to the bonnet 202. Fig.12 As shown, when the retainer assembly 236 is in the first position 1200 , the retainer 240 engages the second end 1206 of the passage opening 1202 of the passage 700 .

[0060] Fig.13 yes Fig.12 FIG. 1 is an enlarged partial cross-sectional view of a valve trim assembly of FIG. 1 , which shows the retainer assembly 236 in the second position 1300. Fig.13 As shown, when the retainer assembly 236 is in the second position 1300, the retainer 240 engages the first end 1204 of the passage opening 1202 of the passage 700. The retainer assembly 236 of the illustrated example enables the cage 206 to move relative to the bonnet 202 via the retainer 240, the passage 700, and / or the cage / bonnet seal 216.

[0061] In accordance with the foregoing, the example bonnet and trim assembly 102 provides a cartridge holder 300 that is removably coupled to the valve body 104 as a single piece or unit. The cartridge holder 300 facilitates assembly, disassembly, and repair of the fluid valve 100. For example, during disassembly, the retainer 240 retains the trim assembly 204 coupled to the bonnet 202, and removing the bonnet 202 from the valve body 104 results in the removal of the trim assembly 204 from the valve body 104. Additionally, the retainer assembly 236 provides a joint (e.g., a non-rigid joint) that couples the cage 206 and the bonnet 202 and allows axial movement to enable the cage / bonnet seal 216 (e.g., a spiral wound gasket) to account for thermal expansion while operating. The retainer assembly 236 also includes key features that enable the cage 206 to be oriented (e.g., oriented) relative to the bonnet 202. The retainer assembly 236 (eg, the passage 700 , the cage mounting interface 242 , and / or the bonnet mounting interface 244 ) may be manufactured via additive manufacturing techniques, casting, molding, and / or any other manufacturing process.

[0062] A valve cover and valve trim assembly is disclosed herein. Other examples and combinations thereof include the following:

[0063] In some examples, an example bonnet and valve trim assembly includes a bonnet configured to be coupled to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining a body has a bonnet mounting interface to couple to a cage mounting interface of the bonnet. A retainer retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. When the retainer is coupled to the cage and the bonnet, the retainer enables axial movement between the cage and the bonnet.

[0064] In some examples, the valve seat is coupled to a cage.

[0065] In some examples, the valve seat is integrally formed with the cage.

[0066] In some examples, the valve plug is located in a cage bore defined by a body of the cage, wherein the cage bore slidably receives the valve plug; and further comprising a valve stem coupled to the valve plug, the valve stem being slidably received by a stem bore defined by a bonnet.

[0067] In some examples, the cage mounting interface of the bonnet is located inwardly of the periphery of the valve body mounting flange.

[0068] In some examples, the cage mounting interface of the bonnet includes a first opening, and the bonnet mounting interface of the cage includes a second opening to receive the retainer.

[0069] In some examples, an example bonnet and valve trim assembly includes a bonnet having a plurality of first protrusions radially spaced relative to a longitudinal axis of the bonnet. A cage having a plurality of second protrusions radially spaced relative to the longitudinal axis of the cage. When the cage is coupled to the bonnet, the first protrusions are interdigitated with the second protrusions. A fastener is used to couple the first protrusions and the second protrusions to retain the cage coupled to the bonnet.

[0070] In some examples, when the cage is coupled to the bonnet, the first protrusion and the second protrusion are interdigitated to form a ring.

[0071] In some examples, the first protrusion and the second protrusion have an arcuate profile to define a ring when the cage is coupled to the bonnet.

[0072] In some examples, each of the first protrusions includes a first opening to receive a fastener, and each of the second protrusions includes a second opening to receive a fastener, and the first opening of a first one of the first protrusions is aligned with the second opening of a first one of the second protrusions adjacent to the first one of the first protrusions.

[0073] In some examples, the first opening and the second opening each have an elliptical cross-sectional shape.

[0074] In some examples, a seal is located between the cage and the bonnet.

[0075] In some examples, the first opening, the second opening, and the seal enable the cage to move in a direction along a longitudinal axis of the cage to accommodate at least one of thermal expansion or a tolerance stack-up.

[0076] In some examples, the valve plug and the valve stem coupled to the valve plug, when the valve cage is coupled to the valve cover, the valve plug slides relative to the valve cage, and the valve stem slides relative to the valve cover.

[0077] In some examples, the second protrusion of the cage is positioned adjacent to a first end of the cage, and the valve seat is coupled to a second end of the cage opposite the first end.

[0078] In some examples, the bonnet and trim assembly provides a cartridge holder to enable the bonnet and trim assembly to be removably coupled to the valve body as a single unit.

[0079] In some examples, an example method includes obtaining a bonnet having a cage mounting flange; obtaining a cage having the bonnet mounting flange; and coupling the bonnet and the cage via the retainer by inserting the retainer into a passage defined by the cage mounting flange and the bonnet mounting flange.

[0080] In some examples, the method includes positioning a seal between a cage mounting flange and a bonnet mounting flange prior to coupling the bonnet and the cage via the retainer.

[0081] In some examples, the method includes positioning a valve plug in a bore of a cage; positioning a valve stem in a bore of a bonnet; and attaching an end of the valve stem and the valve plug before coupling the bonnet and the cage via a retainer.

[0082] In some examples, the method includes mounting the bonnet to the valve body via a flange of the bonnet, wherein mounting the bonnet to the valve body positions the cage and the valve plug in a fluid flow passage of the valve body.

[0083] Although certain apparatus, methods, and articles of manufacture have been described herein, the scope of coverage of this patent is not limited thereto. On the contrary, this patent covers all apparatus, methods, and articles of manufacture fairly falling within the scope of the following claims either literally or under the doctrine of equivalents.

Claims

1. A valve cover and valve trim assembly, comprising: a bonnet configured to be coupled to the valve body via the valve body mounting flange, the bonnet including a cage mounting interface; a cage defining a body having a bonnet mounting interface to couple to the cage mounting interface of the bonnet; as well as a retainer that retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet, the retainer enabling axial movement between the cage and the bonnet when the retainer is coupled to the cage and the bonnet; Wherein the retainer is a wire coupled to the cage mounting interface and the bonnet mounting interface. 2 . The assembly of claim 1 , further comprising a valve seat coupled to the cage.

3. The assembly of claim 2, wherein the valve seat is integrally formed with the cage.

4. The assembly according to claim 1 further includes a valve plug and a valve stem, wherein the valve plug is located in a valve cage hole defined by the body of the valve cage, wherein the valve cage hole can slideably receive the valve plug; the valve stem is coupled to the valve plug, and the valve stem is slideably received by the valve stem hole defined by the valve cover.

5. The assembly of claim 1 wherein the cage mounting interface of the bonnet is located inwardly of a periphery of the valve body mounting flange.

6. The assembly of claim 1, wherein the cage mounting interface of the bonnet includes a first opening, and the bonnet mounting interface of the cage includes a second opening to receive the retainer.

7. The assembly of claim 1, wherein the bonnet mounting interface is staggered with the cage mounting interface.

8. The assembly of claim 1, wherein the wire is insertable into a first opening of the cage mounting interface and a second opening of the bonnet mounting interface.

9. The assembly of claim 1, wherein the cage mounting interface is formed by a first notch, and wherein the bonnet mounting interface is formed by a second notch, wherein when the bonnet is coupled to the cage, the first notch receives the bonnet mounting interface and the second notch receives the cage mounting interface.

10. The assembly of claim 1, wherein the cage mounting interface is a first protrusion and the bonnet mounting interface is a second protrusion, wherein the first protrusion is staggered with the second protrusion.

11. A valve cover and valve trim assembly, comprising: a valve cover having a plurality of first projections radially spaced relative to a longitudinal axis of the valve cover; as well as a cage having a plurality of second projections radially spaced relative to a longitudinal axis of the cage, the first projections being interdigitated with the second projections when the cage is coupled to the bonnet; as well as A fastener is used to couple the first protrusion and the second protrusion to hold the cage coupled to the bonnet.

12. The assembly of claim 11, wherein the first protrusion and the second protrusion are interdigitated to form a ring when the cage is coupled to the bonnet.

13. The assembly of claim 12, wherein the first and second projections have an arcuate profile to define the ring when the cage is coupled to the bonnet.

14. The assembly of claim 11, wherein each of the first protrusions includes a first opening to receive a fastener, and each of the second protrusions includes a second opening to receive the fastener, the first opening of a first one of the first protrusions being aligned with the second opening of a first one of the second protrusions of the first first protrusion adjacent to the first protrusion.

15. The assembly of claim 14, wherein the first opening and the second opening each have an elliptical cross-sectional shape.

16. The assembly of claim 15, further comprising a seal located between the cage and the bonnet.

17. The assembly of claim 16, wherein the first opening, the second opening, and the seal enable the cage to move in a direction along the longitudinal axis of the cage to accommodate at least one of thermal expansion or tolerance stack-up.

18. The assembly of claim 11, further comprising a valve plug and a valve stem coupled to the valve plug, the valve plug sliding relative to the valve cage and the valve stem sliding relative to the valve cap when the valve cage is coupled to the valve cap.

19. The assembly of claim 18, wherein the second protrusion of the cage is positioned adjacent a first end of the cage, and a valve seat is coupled to a second end of the cage opposite the first end.

20. The assembly of claim 11, wherein the bonnet and trim assembly provides a cartridge holder to enable the bonnet and trim assembly to be removably coupled to a valve body as a single unit.

21. A method of manufacturing a valve cover and valve trim assembly, comprising: obtaining a bonnet having a cage mounting flange; obtaining a cage having a bonnet mounting flange; as well as coupling the bonnet and the cage via the retainer by inserting the retainer into a passage defined by a first opening of the cage mounting flange and a second opening of the bonnet mounting flange; Wherein the retainer is a wire.

22. The method according to claim 21, further comprising: Prior to coupling the bonnet and the cage via the retainer, a seal is positioned between the cage mounting flange and the bonnet mounting flange.

23. The method according to claim 22, further comprising: positioning a valve plug in the bore of the cage; positioning a valve stem in the hole of the valve cover; and attaching an end of the valve stem and the valve plug before coupling the bonnet and the cage via the retainer.

24. The method according to claim 23, further comprising: The bonnet is mounted to a valve body via a flange of the bonnet, wherein mounting of the bonnet to the valve body positions the cage and the valve plug in a fluid flow passage of the valve body.

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