Valve and spool assembly for valve

Abstract

Valves and spool assemblies for valves are described herein. An example valve disclosed herein includes a valve body defining a fluid passage; a seat in the fluid passage; a plug; and a flow control member at least partially disposed in the bore of the plug. A balancing chamber is defined in the bore between an end of the flow control member and an inner surface of the bore. The flow control member has a balancing passage extending between a first opening on an outer side surface of the flow control member and a second opening at an end of the flow control member, the outer side surface of the flow control member having an annular groove at the location of the first opening, to increase pressure within the balance chamber when the flow control member is in the open position.

Description

Technical Field

[0001] This disclosure relates primarily to process control devices, and more particularly to valves and valve core assemblies for valves. Background Technology

[0002] Valves are commonly used in process control systems to control the flow of fluids (e.g., liquids, gases, etc.) between two locations. Some types of valves are configured as pressure regulators, which can be used to regulate the pressure of a fluid to a substantially constant value. For example, pressure regulators typically have an inlet that receives a fluid supply at a relatively high pressure and reduces the pressure to a lower and / or substantially constant pressure at the outlet. Summary of the Invention

[0003] The example valve disclosed herein includes a valve body defining a fluid passage between an inlet and an outlet; and a valve core assembly coupled to the valve body. The valve core assembly includes a cage having a central channel. The valve core assembly also includes a seat located within the fluid passage. The seat defines an orifice. The seat is coupled to the cage such that removing the cage from the valve body also removes the seat from the valve body. Furthermore, the valve core assembly includes a flow control member located within the central channel of the cage. The flow control member is movable relative to the seat between an open position and a closed position.

[0004] Another example valve disclosed herein includes a valve body defining a fluid passage between an inlet and an outlet; and a valve core assembly coupled to the valve body. The valve core assembly includes a plug and a valve core body coupled to the plug. The valve core body defines a central channel. The valve core body has a first portion defining a seat; a second portion defining a cage; and one or more ribs extending between the first and second portions. The valve core body also includes a flow control member located within the central channel of the valve core body. The flow control member is movable between an open position, in which fluid flow is permitted through the seat, and in a closed position, fluid flow is blocked through the seat.

[0005] The example valve spool assembly for a valve disclosed herein includes a plug defining an orifice. This plug is coupled to the valve body of the valve. The valve spool assembly also includes a valve spool body defining a central passage. The valve spool body has a first portion and a second portion connected by one or more ribs. The first portion defines a seat, and the second portion defines a cage. The second portion is coupled to the plug. The valve spool assembly also includes a flow control member disposed within the orifice of the plug and the central passage of the valve spool body. The flow control member is movable relative to the seat between an open position and a closed position.

[0006] The example valve disclosed herein includes a valve body defining a fluid passage between an inlet and an outlet; a seat located in the fluid passage and defining an orifice; a plug coupled to the valve body and defining an orifice; and a flow control member at least partially disposed in the orifice of the plug. The flow control member is movable relative to the orifice to control the fluid flow through the orifice. A balancing chamber is defined in the orifice, located between an end of the flow control member and an inner surface of the orifice. The flow control member has a balancing passage extending between a first opening on an outer surface of the flow control member exposed to the fluid passage and a second opening at the end of the flow control member to achieve fluid communication between the fluid passage and the balancing chamber. The outer surface of the flow control member has an annular groove located at the position of the first opening to increase the pressure within the balancing chamber when the flow control member is in the open position.

[0007] An example valve core assembly for a valve disclosed herein includes a cage; a seat defining an orifice; and a flow control member slidably disposed within the cage. The flow control member is movable relative to the seat to control fluid flow through the orifice. The flow control member has a first end portion; a second end portion opposite the first end portion; and an outer surface located between the first and second end portions. The flow control member has a balancing passage extending between a first opening on the outer surface and a second opening at the second end portion to achieve fluid communication between the valve's fluid passage and a balancing chamber at the second end portion of the flow control member. The outer surface of the flow control member has an annular groove located at the position of the first opening.

[0008] An example flow control member for a pressure regulator disclosed herein includes a first axial end; a second axial end opposite the first axial end; and an outer surface located between the first and second axial ends. A balancing passage extends through the flow control member between a first opening on the outer surface and a second opening at the second axial end. The outer surface has an annular groove located at the position of the first opening. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of an example valve with an example valve core assembly.

[0010] Figure 2 yes Figure 1 Enlarged cross-sectional view of the valve core assembly.

[0011] Figure 3A and Figure 3B yes Figure 1 A cross-sectional view of an example valve core assembly, showing an example flow control component in the open and closed positions, respectively.

[0012] Figure 4 yes Figure 1A cross-sectional perspective view of the example valve core body of the example valve core assembly.

[0013] Figure 5 yes Figure 1 A perspective view of an example valve core assembly.

[0014] Figure 6A and Figure 6B The example valve core assembly is shown installed. Figure 1 Example process in the example valve body of the example valve.

[0015] Figure 7 This is a cross-sectional view of an example valve core assembly with an alternative shape for flow control components.

[0016] Figure 8 yes Figure 1 A cross-sectional view of an example valve core assembly having an example flow control member with an example groove.

[0017] Figure 9 yes Figure 8 An enlarged view of an example disc cover for an example flow control component, showing an example groove.

[0018] Figure 10 yes Figure 1 A cross-sectional view of an example valve, in which... Figure 8 The example flow control component is in the open position.

[0019] Figure 11 It has traditional flow control components and has Figures 8 to 10 The example flow control component is a graph of outlet pressure versus flow rate during the open-close cycle.

[0020] Generally, the same reference numerals are used throughout the accompanying drawings and written description to denote the same or similar parts. The drawings are not necessarily drawn to scale. Instead, the thickness of layers or regions may be enlarged in the drawings. Although layers and regions with clearly defined lines and boundaries are shown in the figures, some or all of these lines and / or boundaries may be idealized. In reality, boundaries and / or lines may be unobservable, mixed, and / or irregular. Detailed Implementation

[0021] A valve typically includes a valve body defining a fluid passage and one or more valve core components for controlling or regulating fluid flow through the fluid passage. The valve core components typically include a valve seat, a cage, and a flow control member. The valve seat is mounted in the fluid passage and defines an opening or orifice through which fluid flows. The cage is coupled to the valve body and aligned with the valve seat. The flow control member is slidably disposed within the cage. The flow control member can move between an open position and a closed position (e.g., via an actuator), in which the flow control member is spaced apart from the valve seat to allow fluid flow through the valve seat, and in the closed position, the flow control member is engaged with the valve seat and blocks fluid flow through the valve seat.

[0022] The valve core component is typically mounted within the valve body through an opening or port on the valve body. This opening is covered or sealed using a plug, valve cap, or other body components. The valve seat is usually mounted in the center of the valve body or at a relatively deep location within the valve body. Therefore, if the valve seat needs to be replaced, many valve core components (such as flow control components, cages, etc.) must be removed before the valve seat can be removed. This process can take a considerable amount of time. Furthermore, the openings near the valve core components may be relatively small (e.g., 1 inch or less), making them difficult to access by hand. Therefore, specialized tools are often required to remove and / or install the valve seat.

[0023] Furthermore, in known valves, the valve seat and cage are typically separated by a relatively large gap or space. This results in a longer guide path for the flow control component. Consequently, the geometric tolerances of the components during manufacturing and assembly have a significant impact on the alignment of the flow control component and the valve seat. This can sometimes lead to uneven forces on the sealing surface, and consequently, poor sealing.

[0024] This document discloses a valve with a valve core assembly, wherein the valve seat and cage are integrated together and / or otherwise connected to each other. For example, the valve seat and cage may be constructed as a single piece or component (e.g., an integral structure). In some examples, the valve seat and cage are connected by one or more ribs. This greatly simplifies the process of installing the valve seat to and / or removing the valve seat from the valve body. For example, when the cage is removed from the valve body, the valve seat is also removed from the valve body along with the cage.

[0025] In some examples, the valve core assembly includes a plug. A cage is threaded to the plug. The plug is threaded into an opening in the valve body to install the valve core assembly in the fluid passage. Therefore, the valve core assembly, including the valve seat, cage, flow control element, and plug, can be easily removed and / or installed as a single unit. For example, when a technician or operator removes the plug, all valve core assembly parts within the valve body exit the valve body together. This makes removing and / or installing components including the valve seat significantly easier within the valve body. Furthermore, this eliminates the need for specialized tools for removing / installing the valve seat.

[0026] Furthermore, by integrating the valve seat and cage together, they can be positioned relatively close to each other, resulting in better alignment between the two parts. In addition, this integration significantly reduces the impact of geometric tolerances between the valve seat's sealing surface and the flow control components. In this way, the sealing surface can withstand stress more evenly, thereby improving the seal.

[0027] This document also discloses an example flow control member with a balancing passage. The balancing passage fluidly connects the fluid passage of the valve to a balancing chamber at the rear end of the flow control member. This helps reduce the pressure differential across the entire flow control member and, consequently, the force required to open or close the flow control member. In some examples, the balancing passage extends between a first opening and a second opening, the first opening located on the outer surface of the flow control member exposed to the fluid in the valve's fluid passage, and the second opening located on the rear end of the flow control member exposed to the balancing chamber. This allows fluid from the fluid passage to fill and pressurize the balancing chamber. The first opening is located at or near the section of the flow control member that engages with the seat. When the flow control member is in the open position, the flow velocity of the fluid through the seat can be relatively high. In conventional flow control member designs, this high flow velocity results in a lower pressure region near the first opening of the balancing passage. Thus, the pressure in the balancing chamber is reduced, resulting in a larger pressure differential or net downward force on the flow control member, which in turn makes the forces on the flow control member unstable. This can sometimes cause the flow control member to get stuck in the open position, flip further downward, and / or close too slowly, resulting in instability in the valve outlet pressure (e.g., pressure spikes). The example flow control member disclosed herein includes a groove (e.g., a recess or a reduced-diameter section) on its outer surface, located at the same position as the first opening of the balancing passage. The groove creates a higher-pressure region near the first opening of the balancing passage. This helps increase the pressure in the balancing chamber and consequently results in a lower pressure differential or net upward / closing force on the flow control member, allowing the flow control member to move with a smaller closing force (e.g., close). In this way, the flow control member can move to the closed position as intended, thus reducing or eliminating pressure spikes at the valve outlet.

[0028] Figure 1 This is a cross-sectional view of an example valve 100 constructed according to the teachings of this disclosure. In this example, valve 100 is configured as a pressure regulator that can be used to regulate and / or otherwise control the flow and / or pressure of a process fluid. However, it should be understood that the example disclosed herein can also be similarly implemented with other types of valves.

[0029] As mentioned above, Figure 1 Valve 100 can be used to regulate or control the pressure of process fluids. The process fluid can be any type of fluid, such as natural gas, oil, water, etc. For example, Figure 1An example valve 100 is shown installed between an upstream pipeline 102 and a downstream pipeline 104. The upstream pipeline 102 supplies process fluid from an upstream source (e.g., a distribution device), and the downstream pipeline 104 directs the process fluid to a downstream location (e.g., a customer). The valve 100 can be used to regulate and / or control the pressure of the fluid between the upstream pipeline 102 and the downstream pipeline 104. For example, the valve 100 can be used to reduce the pressure from a first pressure P1 in the upstream pipeline 102 to a second pressure P2 in the downstream pipeline 104. The downstream pressure P2 can be based on the capacity and / or demand of the downstream location. This prevents excessive pressurization at the downstream location.

[0030] exist Figure 1 In the example shown, valve 100 includes a device body 106 (e.g., housing, shell, etc.). In this example, device body 106 includes a valve body 108 (sometimes also referred to as a regulator body or shell) and an actuator housing 110 connected together (e.g., via one or more bolts). However, in other examples, device body 106 may include more or fewer bodies or shells. In the example shown, valve body 108 defines a fluid passage 112 located between an inlet 114 at a first end 116 of valve body 108 and an outlet 118 at a second end 120 of valve body 108. An upstream conduit 102 is coupled to the first end 116 of valve body 108 at inlet 114, and a downstream conduit 104 is coupled to the second end 120 of valve body 108 at outlet 118. In some examples, such as Figure 1 As shown, a portion of the fluid passage 112 at the inlet 114 has a first internal thread 115. This allows a threaded connector on the upstream pipe 102 (e.g., via a National Pipeline Thread (NPT) connection) to be screwed into the inlet 114 to connect the upstream pipe 102 to the valve body 108. Similarly, a portion of the fluid passage 112 at the outlet 118 has a second internal thread 117, allowing a threaded connector on the downstream pipe 104 to be screwed into the outlet 118 to connect the downstream pipe 104 to the valve body 108.

[0031] To control the flow of fluid through fluid passage 112, valve 100 includes a valve core assembly 122. This valve core assembly is coupled to valve body 108 and extends at least partially into fluid passage 112. For example, valve core assembly 122 includes a seat 124 disposed in fluid passage 112. Seat 124 defines an orifice 126 (also referred to as an opening) through which fluid flows. Seat 124 divides fluid passage 112 into an upstream portion 128 (upstream of seat 124) and a downstream portion 130 (downstream of seat 124). Valve core assembly 122 also includes a flow control member 132 (implemented as a disc assembly in this example). Flow control member 132 can also be referred to as a valve core. Flow control member 132 is movable relative to seat 124 to control the flow of fluid through orifice 126 of seat 124, and consequently, the flow of fluid between inlet 114 and outlet 118. In particular, flow control member 132 is movable between a closed position and an open position. Figure 1 In the open position shown, the flow control member 132 is spaced apart from the seat 124, thereby allowing fluid to flow through the seat 124 from the inlet 114 to the outlet 118. In the closed position, the flow control member 132 moves upward and engages sealingly with the seat 124, thereby blocking or preventing fluid from flowing through the seat 124 and, consequently, preventing fluid from flowing between the inlet 114 and the outlet 118.

[0032] As disclosed above, Figure 1 Valve 100 is configured as a pressure regulator. In this manner, valve 100 includes actuator components for opening and closing valve 100 to regulate the pressure of a fluid. In the illustrated example, valve 100 includes a disc or plate 134 coupled to valve body 108. Valve 100 has a valve stem 136. The valve stem 136 extends through plate 134 and engages with flow control member 132. Valve stem 136 is movable up and down (e.g., sliding) relative to plate 134. In the illustrated example, valve 100 includes a diaphragm 138 coupled between valve body 108 and actuator housing 110. Pressure sensing chamber 140 is defined between plate 134 and diaphragm 138. Plate 134 has an opening 142 allowing fluid from downstream portion 130 to fill pressure sensing chamber 140. Therefore, pressure sensing chamber 140 has the same or substantially the same pressure as downstream portion 130.

[0033] In the illustrated example, valve 100 includes a control spring 144. This control spring 144 is used to control or set the opening and closing pressures of valve 100. The control spring 144 is disposed within a control chamber 146 in actuator housing 110. In some examples, the control chamber 146 is open to the atmosphere via a vent 148. In other examples, a fluid line may be connected to the vent 148 to place the control chamber 146 at a pressure different from (e.g., higher than) atmospheric pressure. A diaphragm 138 separates the pressure sensing chamber 140 and the control chamber 146.

[0034] Valve 100 includes a diaphragm plate 150 coupled to a diaphragm 138. A control spring 144 engages with the diaphragm plate 150. The control spring 144 pushes the diaphragm plate 150 and the diaphragm 138 toward the pressure sensing chamber 140 (in...). Figure 1 The spring force provided by the control spring 144 can be adjusted by the adjusting knob 152. In the example shown, the adjusting knob 152 is a threaded adjusting screw that is screwed into a threaded opening 154 in the actuator housing 110. The adjusting knob 152 can be rotated (e.g., screwed into or out of the threaded opening 154) to further move the adjusting knob 152 into or out of the actuator housing 110. The adjusting knob 152 is operable to change the spring force on the diaphragm 138. In particular, if the adjusting knob 152 is screwed into the actuator housing 110 (e.g., in the threaded opening 154), the spring force on the diaphragm 138 can be adjusted. Figure 1 If the spring 144 is compressed (e.g., when it moves downwards from the actuator housing 110), the spring force on the diaphragm 138 is increased, thereby increasing the set pressure. Conversely, if it is unscrewed from the actuator housing 110 (e.g., on the...), the spring 144 is compressed, thereby increasing the spring force provided on the diaphragm 138, and thus increasing the set pressure. Figure 1 Moving the adjusting knob 152 upwards allows the spring 144 to relax or extend, thereby reducing the spring force provided on the diaphragm 138 and thus lowering the set pressure. In some examples, the adjusting knob 152 can be adjusted manually or with a tool (e.g., a wrench). In other examples, a handwheel can be attached to the adjusting knob 152 and used to rotate it. In the illustrated example, the valve 100 includes a lock nut 156 threaded onto the adjusting knob 152. Once the adjusting knob 152 is set to the desired setting or position, the lock nut 156 can be rotated until it engages with the actuator housing 110, thereby locking the adjusting knob 152 in place and preventing accidental tightening.

[0035] In operation, valve 100 receives fluid at inlet 114 at a first pressure P1. Valve 100 is configured to stop or reduce fluid flow to outlet 118 based on the fluid pressure at a downstream point (referred to as a second pressure P2). If pressure P2 meets or exceeds a specific pressure (referred to herein as the set or trigger pressure), valve 100 closes fluid passage 112, thereby regulating the fluid pressure at the downstream point.

[0036] When the pressure at P2 is lower than the set pressure, the downward force from the control spring 144 acting on the diaphragm 138 is greater than the upward force from the pressure in the pressure sensing chamber 140 acting on the diaphragm 138. Therefore, the diaphragm 138 is held in the downward position, as... Figure 1As shown. In this downward position, the diaphragm 138 engages with the valve stem 136 and holds the valve stem 136 in the downward position. In this position, the flow control member 132 is spaced apart from the seat 124. Therefore, the flow control member 132 is in the open position and allows fluid flow through the seat 124. However, if the pressure P2 exceeds the set pressure, the force generated by the pressure in the pressure sensing chamber 140 overcomes the force from the control spring 144. In this way, the diaphragm 138 moves upward and away from the valve stem 136. The valve core assembly 122 includes a spring (shown in more detail) that faces the seat 124 ( Figure 1 The flow control member 132 is biased upwards. As the diaphragm 138 moves away from the valve stem 136, the flow control member 132 and the valve stem 136 move upwards (by bias from the spring in the valve core assembly 122). In this way, the flow control member 132 moves to engage with the seat 124. This blocks the flow through the seat 124, thereby preventing fluid flow to the downstream pipe 104 and thus reducing the pressure. When the pressure P2 falls below the set pressure, the force acting on the top of the diaphragm 138 overcomes the force on the bottom of the diaphragm 138, and the diaphragm 138 moves downwards to open the valve 100, and then the cycle repeats.

[0037] Figure 2 This is an enlarged cross-sectional view of the valve core assembly 122 in the valve body 108. In the example shown, the valve core assembly 122 includes a seat 124, a flow control member 132, a cage 200, and a plug 202. In this example, the seat 124 and the cage 200 are coupled together and / or otherwise integrated into a single component, as disclosed in further detail herein. In this way, when the cage 200 is removed from the valve body 108, the seat 124 is also removed from the valve body 108.

[0038] like Figure 2 As shown, plug 202 is connected to valve body 108. Specifically, in this example, plug 202 is threaded to valve body 108. For example, as... Figure 2 As shown, plug 202 has a stepped profile defining a first portion 204, a second portion 206, and a third portion 208 (e.g., a head). The diameter of the second portion 206 is larger than the diameter of the first portion 204, and the diameter of the third portion 208 is larger than the diameter of the second portion 206. In this example, valve body 108 has an opening 210 (also referred to as an access opening) with internal threads 212. The second portion 206 of plug 202 has external threads 214 that mate with the internal threads 212 of opening 210. Therefore, plug 202 (along with the rest of valve core assembly 122) can be attached to valve body 108 by screwing plug 202 into opening 210. Similarly, plug 202 (and the rest of valve core assembly 122) can be removed from valve body 108 by unscrewing plug 202 from valve body 108. Figure 2As shown, the third portion 208 of the plug 202 remains on the outside of the valve body 108. In some examples, the third portion 208 is shaped to be received by a tool (e.g., a socket wrench) for tightening or loosening the plug 202. For example, the third portion 208 may have a hexagonal head shape. In the example shown, the valve core assembly 122 includes a seal 216 (e.g., an O-ring) disposed around the second portion 206. The seal 216 is sandwiched between the plug 202 and the valve body 108 and forms a sealing interface to prevent or limit fluid leakage through the opening 210.

[0039] In the illustrated example, cage 200 is coupled to plug 202. In this example, cage 200 and plug 202 are threaded together. For example, a first portion 204 of plug 202 has an external thread 218. Cage 200 has a first end 220; a second end 222 opposite to the first end 220; and a central channel 224 extending through cage 200 between the first end 220 and the second end 222. A portion of the inner surface 226 of cage 200 has an internal thread 228 that is threaded to the external thread 218 of plug 202. Therefore, cage 200 can be screwed onto plug 202 to connect cage 200 and plug 202, and / or can be unscrewed from plug 202 to disconnect cage 200 and plug 202.

[0040] A flow control component 132 is disposed in the central channel 224 of the cage 200. In the illustrated example, the flow control component 132 includes multiple parts or components. For example, in Figure 2 In this example, the flow control component 132 includes a disc body 230, a disc cover 232, and a seal 234. The disc body 230 has a central channel 236. The disc cover 232 is partially inserted into the central channel 236 and coupled to the disc body 230. In some examples, the disc cover 232 is press-fitted into the channel 236. Alternatively, the disc cover 232 may be threaded into the channel 236. The seal 234 is sandwiched between the disc cover 232 and the disc body 230. When the flow control component 132 is in the closed position, the seal 234 engages the seat 124, thereby forming a sealing interface that prevents fluid from flowing through the seat 124.

[0041] Between the open and closed positions, the flow control member 132 can move up and down (e.g., slide) within the central channel 224 of the cage 200. Figure 2As shown, the valve core assembly 122 includes a first bushing 237 located between the flow control member 132 and the inner surface 226 of the defined central channel 224 of the cage 200. Specifically, in this example, the first bushing 237 is disposed within a recess or gland of the disc body 230. As the flow control member 132 moves up and down within the cage 200, the first bushing 237 slides along the inner surface 226. The first bushing 237 forms a low-friction interface, allowing the flow control member 132 to slide smoothly within the central channel 224. Furthermore, the use of the first bushing 237 restricts or prevents direct metal-to-metal contact between the flow control member 132 and the cage 200, thereby reducing or preventing blockage. In this way, the use of the first bushing 237 improves reliability and extends the service life of the component. In some examples, the first bushing 237 is made of polytetrafluoroethylene (PTFE). However, in other examples, the first bushing 237 may be made of other materials.

[0042] In the example shown, plug 202 defines orifice 238. The disc 230 of flow control member 132 extends into orifice 238. Valve spool assembly 122 includes spring 240 for moving flow control member 132 toward seat 124 (e.g., along...). Figure 2 The spring 240 is biased in the upward direction. In the example shown, the spring 240 is disposed around (e.g., coaxial with) the disc 230 of the flow control member 132. The disc 230 has a shoulder or flange 242. The spring 240 is disposed (e.g., axially constrained) between the flange 242 of the disc 230 and the shoulder 244 in the hole 238 of the plug 202. However, in other examples, the spring 240 may be disposed in other locations. In the example shown, the flange 242 is spaced apart from the inner surface 249 of the hole 238, such that fluid can fill the region of the hole 238 between the flange 242 and the shoulder 244. Figure 2 As shown, cage 200 has radial openings 246a, 246b. Cage 200 may include any number of radial openings. Radial openings 246a, 246b allow fluid from the upstream portion 128 of the fluid passage to fill orifice 238. This reduces (e.g., minimizes) the pressure differential acting across the entire flow control member 132, thereby reducing the amount of force required to move the flow control member 132 between the open and closed positions.

[0043] In the illustrated example, valve core assembly 122 includes a seal 248 located between flow control member 132 and inner surface 249 of plug 202. In the illustrated example, seal 248 is disposed within a recess or gland in disc 230 of flow control member 132. Seal 248 prevents or limits fluid leakage. Valve core assembly 122 also includes a second bushing 250 located between flow control member 132 and inner surface 249 of defining orifice 238 of plug 202. In the illustrated example, second bushing 250 is also disposed within a recess or gland in disc 230 with seal 248. Similar to first bushing 237, second bushing 250 limits or prevents metal-to-metal contact and provides a low-friction interface for flow control member 132, allowing it to slide smoothly within orifice 238. In some examples, second bushing 250 is made of PTFE, but in other examples it may be made of other materials. Therefore, the flow control member 132 is supported in and / or aligned in the valve core assembly 122 via two sliding interfaces: a sliding interface with the cage 200 and a sliding interface with the plug 202. The coefficient of friction provided by the first and second bushings 237, 250 is relatively small. In this way, when installing and / or removing the components, the first bushing 237 prevents or restricts the flow control member 132 and the cage 200 from being blocked, and the second bushing 250 prevents or restricts blockage between the flow control member 132 and the plug 202.

[0044] In the illustrated example, the flow control member 132 is partially disposed within the orifice 238 of the plug 202. A balancing chamber 256 is formed or defined between the bottom or rear end of the flow control member 132 and the inner surface 249 of the orifice 238. In the illustrated example, the flow control member 132 has a balancing passage 258 extending between the outer surface of the flow control member 132 near the seat 124 and the bottom end of the flow control member 132 located in the orifice 238. The balancing passage 258 fluidly connects the fluid passage 112 and the balancing chamber 256, thereby allowing pressurized fluid in the fluid passage 112 to fill the balancing chamber 256. The pressure in the balancing chamber 256 is used to balance axial forces on the flow control member 132 (e.g., resisting forces acting on the upper part of the flow control member 132 and / or the valve stem 136). Figure 1 The relative pressure on the flow control component 132 allows it to be opened or closed with a smaller force.

[0045] Seat 124 defines orifice 126 through which fluid flows when flow control member 132 is in the open position. In the illustrated example, seat 124 engages with a first shoulder 252 in valve body 108. Valve core assembly 122 includes a seal 254 located between seat 124 and a second shoulder 253 of valve body 108, forming a sealing interface to prevent or limit fluid leakage between seat 124 and valve body 108. As described above, flow control member 132 is movable relative to seat 124 between an open position and a closed position. In the open position, flow control member 132 is spaced apart from seat 124, allowing fluid flow through orifice 126, and in the closed position, flow control member 132 engages with seat 124 and blocks fluid flow through orifice 126.

[0046] Figure 3A The valve core assembly 122 is shown in the open position with the flow control component 132 in the same position. Figure 3B The valve core assembly 122 is shown in the closed position with the flow control component 132. (See diagram.) Figure 3A As shown, the seal 234 of the flow control member 132 is spaced apart from the seat 124. As indicated by the arrow, this allows fluid to flow through the space between the cage 200 and the seat 124, and through the orifice 126 of the seat 124.

[0047] When the flow control component 132 moves to the closed position, such as Figure 3B As shown, the seal 234 of the flow control member 132 engages with the seat 124. Specifically, the seal 234 engages with the sealing surface 300 (e.g., annular edge) on the seat 124, thereby forming a liquid-tight seal. This prevents fluid flow through the orifice 126 of the seat 124.

[0048] like Figure 3B As shown, the cover 232 has a channel 301 that fluidly connects the orifice 126 to the central channel 236 of the disc body 230. The channel 301 in the cover 232 and the central channel 236 in the disc body 230 form a balancing passage 258. The balancing passage 258 allows pressurized fluid (depending on the location of the flow control member 132) in or near the orifice 126 to fill the balancing chamber 256 at the bottom of the orifice 238 below the flow control member 132. This reduces (e.g., minimizes) the pressure differential across the entire flow control member 132, which could otherwise cause the flow control member 132 to become stuck in the open or closed position, or require greater force to move the flow control member 132.

[0049] Figure 4 This is a cross-sectional perspective view of cage 200 and seat 124. As described above, cage 200 and seat 124 are joined and / or otherwise connected as a single component or member. For example, Figure 4The component shown is referred to herein as valve body 400. Valve body 400 has a first portion 402 corresponding to or defining seat 124, and a second portion 404 corresponding to or defining cage 200. Valve body 400 has a central channel 405 that corresponds to or defines or defines or defines or defines an orifice 126 of seat 124 and a central channel 224 of cage 200. In the illustrated example, valve body 400 has one or more radial openings 406a, 406b. These radial openings 406a, 406b extend between the outer surface of valve body 400 and the central channel 405. The radial openings 406a, 406b define a space for fluid flow between seat 124 and cage 200.

[0050] In some examples, the first part 402 and the second part 404 are connected by one or more ribs or supports. For example, as... Figure 4 As shown, the first portion 402 and the second portion 404 are connected by a rib 408. In other words, the rib 408 extends between the first portion 402 and the second portion 404. In this way, the seat 124 and the cage 200 are connected by the rib 408. Although only one rib is shown, the valve core body 400 may include multiple ribs connecting the first portion 402 (seat 124) and the second portion 404 (cage 200). The ribs 408 may be equidistantly spaced around the circumference of the central channel 405. Radial openings 406a, 406b are defined between the first portion 402 (seat 124), the second portion 404 (cage 200), and one or more ribs 408.

[0051] After the valve core assembly 122 is assembled, the valve core body 400 (including the seat 124 and the cage 200) is connected to the plug 202. Figure 2 Specifically, as described above, the cage 200 (second part 404) is threaded to the plug 202. In this way, the seat 124 is connected to the plug 202 via the rib 408 and the cage 200. Furthermore, when the valve core assembly 122 is assembled, the flow control member 132 is partially disposed in the central channel 405 of the valve core body 400 (corresponding to the central channel 224 of the cage 200) and partially disposed in the hole 238 of the plug 202. Thus, once the cage 200 is connected to the plug 202, all components of the valve core assembly 122 are connected as a single unit.

[0052] In some examples, the valve body 400 is made of metal, such as stainless steel (e.g., ASTM A4793 1600) or alloy steel (e.g., 40CrNiMo). In other examples, the valve body 400 may be made of other types of materials. In some examples, the valve body 400, including the seat 124, cage 200, and rib 408, is constructed as a single integral structure. For example, the valve body 400 may be a machined part, such as a component made of steel bars. In another example, the valve body 400 may be cast or molded as a single part. In other examples, the valve body 400 may be constructed by additive manufacturing (sometimes also called 3D printing). Additive manufacturing involves fusing or bonding continuous layers of material to form a part. In other examples, the seat 124, cage 200, and rib 408 may be constructed as separate parts or components joined together (e.g., via welding, via fasteners, via adhesives, etc.).

[0053] like Figure 4 As shown, the space defined between the seat 124 and the cage 200 by the radial openings 406a and 406b is relatively small. This reduces the flow control member 132 ( Figure 2 The required stroke for the flow control member 132 to move between the open and closed positions. In this way, the possibility of misalignment between the flow control member 132 and the seat 124 is reduced. Furthermore, because the seat 124 and the cage 200 are connected together, and the flow control member 132 ( Figure 1 and Figure 2 The components are radially fixed within the cage 200, thus significantly reducing the influence of the geometric tolerances of the components on the alignment of the flow control member 132 and the seat 124. As a result, the sealing surface 300 ( Figure 3B It can distribute stress more evenly and greatly improve sealing performance.

[0054] Figure 5 This is a perspective view of the valve core assembly 122 in its assembled state. The valve core body 400, including the seat 124 and the cage 200, is coupled (e.g., threaded) to the plug 202. A flow control member 132 is disposed in the valve core body 400 and the plug 202. The valve core assembly 122 can be installed in and / or removed from the valve body 108 as a single unit.

[0055] Figure 6A and Figure 6B An example process for mounting the valve core assembly 122 in the valve body 108 is shown. Figure 6A A valve core assembly 122 is shown aligned with an opening 210 in the valve body 108. The valve core assembly 122 can be positioned as indicated by the arrows. Figure 6AThe valve core assembly 122 is inserted into the opening 210. When the plug 202 reaches the opening, it can be rotated to screw the plug 202 into the opening 210, which further moves the valve core assembly 122 into the valve body 108. Because the cage 200 and seat 124 are coupled to the plug 202, they also rotate with the plug 202. When the valve core assembly 122 is screwed into the valve body 108 sufficiently, the seal 254 engages the second shoulder 253. Figure 6B A valve core assembly 122 mounted in a valve body 108 is shown. In some examples, even after the seal 254 engages the second shoulder 253, the valve core assembly 122 can be twisted to ensure sufficient pressure between the seal 254 and the second shoulder 253 to prevent or limit leakage. In some examples, the valve core assembly 122 is fully screwed into the valve body 108 when the seat 124 engages the first shoulder 252 and / or the third portion 208 (e.g., the head) of the plug 202 engages the valve body 108. Figure 6B As shown, when the valve core assembly 122 is fully inserted into the valve body 108, the disc cover 232 engages the valve stem 136. As described above, the diaphragm 138 ( Figure 1 The valve stem 136 and the flow control member 132 are biased downwards, while the spring 240 biases the flow control member 132 and the valve stem 136 upwards.

[0056] To remove the valve spool assembly 122, the plug 202 can be unscrewed from the opening 210 and pulled away from the valve body 108. Therefore, the entire valve spool assembly 122 can be removed as a single unit. This greatly simplifies the process of removing the valve spool components, including the seat 124. The valve spool assembly 122 can be cleaned and / or repaired, and then reinstalled in the valve body 108. In other examples, this valve spool assembly 122 can be replaced with another valve spool assembly 122.

[0057] Figure 7 An example valve core assembly 122 with an alternative flow control member 700 is shown. This example can be used for orifices with larger diameters. In this example, the flow control member 700 is implemented as a single component. In the illustrated example, the flow control member 700 has a tapered or conical sealing surface 702 that engages with the seat 124 when the flow control member 700 is in the closed position. Furthermore, in Figure 7 In this example, spring 704 is disposed between the bottom 706 of flow control member 700 and the bottom 708 of hole 238 in plug 202. In this example, flow control member 700 does not include a central channel for balancing pressure. However, in other examples, [the following is not explicitly stated:] ...in conjunction with... Figure 3B Similar to the described flow control component 132, flow control component 700 may include a central channel.

[0058] Figure 8An example of a valve core assembly 122 is shown, wherein the flow control member 132 has an annular groove or recess 800 located on one side of the flow control member 132 at a position for the opening of the balancing passage 258. The presence of the groove 800 facilitates easier closure of the flow control member 132 and thus provides stability of the outlet pressure during a closure event, as disclosed in further detail herein.

[0059] A flow control member 132 is at least partially disposed in the orifice 238 of the plug 202. The flow control member 132 has a first end 802; a second end 804 opposite to the first end 802; and an outer surface 806 located between the first end 802 and the second end 804. The first and second ends 802 and 804 may also be referred to as the first and second axial ends, respectively. A balancing chamber 256 is defined in the orifice 238, located between the second end 804 of the flow control member 132 and the inner surface 249 of the orifice 238. The balancing passage 258 in the flow control member 132 is fluidly connected to the fluid passage 112. Figure 1 The fluid communication between the balancing passage 258 and the balancing chamber 256, and / or otherwise, is achieved. In the example shown, the balancing passage 258 has a first opening 808 on the outer surface 806 of the flow control member 132 (exposing the fluid passage 112). Figure 1 The fluid passage 112 extends between the second opening 810 (exposed to the balance chamber 256) at the second end 804 of the flow control member 132. Figure 1 The pressurized fluid in the flow control member 132 can pressurize the balance chamber 256, thereby helping to reduce the pressure difference across the entire flow control member 132, making it possible to open or close the flow control member 132 with less force. The first opening 808 may also be referred to as the sensing port.

[0060] In this example, the flow control component 132 includes a disc body 230, a disc cover 232, and a seal 234. The disc cover 232 is coupled to the disc body 230, and the seal 234 is coupled (e.g., clamped) between the disc cover 232 and the disc body 230. In this example, the disc cover 232 is threaded to the disc body 230. Specifically, the disc cover 232 has a threaded portion 812 that is screwed into a central channel 236 in the disc body 230. A balancing passage 258 is partially formed or extends through the disc body 230 and the disc cover 232. Specifically, the balancing passage 258 is partially formed by the central channel 236 in the disc body 230 and partially formed by the channel 301 in the disc cover 232. A first opening 808 of the balancing passage 258 is formed on the disc cover 232 and is located between the seal 234 and a first end 802. The second opening 810 is formed on the disc 230 at the second end 804 of the flow control member 132.

[0061] like Figure 8 As shown, the balancing passage 258 has a first portion 814 and a second portion 816 forming a bend or curve. In this example, the first portion 814 and the second portion 816 form a 90° bend. Specifically, the flow control member 132 has a central or longitudinal axis 818. The first portion 814 is connected to a first opening 808 and extends in a direction transverse to (e.g., perpendicular to) the central axis 818, and the second portion 816 is connected to a second opening 810 and extends in a direction aligned with (e.g., coaxial with) the central axis 818. In some examples, the first and second portions 814, 816 are formed by drilling from the sides and bottom, and drilling at a 90° angle is relatively easy for this machining operation. Therefore, this configuration improves machining feasibility and reduces manufacturing costs. However, in other examples, the first and second portions 814, 816 may be at other angles relative to each other, such as Figure 2 , Figure 3A and Figure 3B As shown. The first portion 814 can be considered as a radial path. Although in this example, the flow control member 132 has one radial path (the first portion 814), in other examples, the flow control member 132 may have multiple radial paths (e.g., circumferentially spaced) connected to the second portion 816.

[0062] As mentioned above, in Figure 8 In the example shown, the outer surface 806 of the flow control member 132 has an annular groove 800 located at the position of the first opening 808 of the balance passage 258 (e.g., the same axial position). In this way, the outer surface 806 has a reduced diameter at the position of the first opening 808 relative to the portions of the flow control member 132 located above and below the groove 800. Figure 9 This is an enlarged view of the disc cover 232, showing the recess 800. In some examples, the recess 800 extends completely around the outer surface 806 of the disc cover 232. The disc cover 232 has a shaft portion 900 and a flange portion 902 extending radially outward from the shaft portion 900. When the disc cover 232 is attached to the disc body 230 (… Figure 8 When ), seal 234 ( Figure 8 It is sandwiched between the flange portion 902 and the cover 232. For example... Figure 9 As shown, compared to the shaft portion 900 above the groove 800 and the flange portion 902 below the groove 800, the outer surface 806 has a smaller diameter or a reduced diameter at the groove 800. In the example shown, the groove 800 has an arcuate or rounded profile. However, in other examples, the groove 800 may also be formed by a concave shape with sharp corners or edges. The groove 800 helps to maintain the balance chamber 256 ( Figure 8 The higher pressure inside allows the flow control member 132 to be moved to the closed position with less force.

[0063] Figure 10 A cross-section of the valve core assembly 122 in the valve body 108 is shown with the flow control member 132 in the open position. As described above, the valve 100 operates to reduce the pressure from the inlet pressure P1 at the inlet 114 to the outlet pressure P2 at the outlet 118. When the outlet pressure P2 drops below the set pressure, the flow control member 132 moves downward to the open position. Figure 10 The flow control member 132 is positioned such that fluid can flow to outlet 118 and increase the pressure at outlet 118. Conversely, when the outlet pressure P2 exceeds a set pressure, the flow control member 132 should move upward to the closed position to block fluid flow to outlet 118. In some examples, the pressure difference between inlet pressure P1 and outlet pressure P2 can be relatively large. For example, inlet pressure P1 could be 1,000 psi and outlet pressure P2 could be 10 psi. Due to this large pressure difference, when the flow control member 132 moves to the open position, fluid flows at high speed through orifice 126 of seat 124. The pressure in balancing chamber 256 is affected by the fluid pressure in region 1000 adjacent to the first opening 808 of balancing passage 258. In conventional flow control member designs without grooves, the fluid velocity through orifice 126 of seat 124 is high, causing the pressure in region 1000 to be lower than the pressure of fluid further upstream or downstream of orifice 126. In this way, the pressure in balancing chamber 256 is also reduced. This low pressure in the balance chamber 256 results in a larger pressure differential or downward force on the flow control member 132, which may cause the flow control member 132 to become stuck or remain in the open position for an extended period. For example, when the set pressure is reached at the outlet and the flow control member 132 should begin to move to the closed position, the pressure differential on the flow control member 132 causes unstable forces that tend to keep the flow control member 132 open for a longer period, resulting in higher pressure at the outlet 118, which is undesirable.

[0064] A groove 800 on the outer surface 806 of the flow control member 132 generates greater pressure within region 1000, thereby producing higher-pressure fluid in the balance chamber 256. Specifically, the groove 800 serves to slow the fluid flow within region 1000 adjacent to the first opening 808 of the balance passage 258. This high-pressure region then fills the balance chamber 256 with high-pressure fluid. In this way, the flow control member 132 achieves better pressure balance (e.g., at least partially biased towards the closed position) and can return to the closed position as expected when the set pressure is reached.

[0065] Figure 11 This is a graph of the outlet pressure versus flow rate of the pressure regulator. The graph includes the dashed line 1100, which illustrates the open-close cycle with a standard flow control component (without the groove 800). Figure 11As shown, the outlet pressure reaches its peak before closing, indicating instability during the movement of the flow control component to the closed position. The graph also includes a solid line 1102, which shows... Figures 8 to 10 The flow control component 132 of the groove 800 shown has an open-close cycle. (As shown) Figure 11 As shown, the outlet pressure is more stable and has no peak before closing, indicating that the flow control member 132 closes with less resistance. This is because the recess 800 causes a higher pressure in the balance chamber 256, which biases the flow control member 123 upward toward the closed position, and thus allows the flow control member 132 to move with a smaller closing force.

[0066] A flow control component 132 with a groove 800 is disclosed in combination with a valve core assembly 122 having an integrated cage 200 and a seat 124. However, the flow control component 132 can also be similarly used in combination with valve core assemblies having other designs in which the cage and seat are not integral or fixedly connected.

[0067] "Comprising" and "including" (and all forms and tenses thereof) are used herein as open-ended terms. Therefore, whenever a claim uses any form of "comprising" or "including" (e.g., including, comprising, having, etc.) in the preamble or in any type of claim statement, it should be understood that additional elements, terms, etc., may be present without exceeding the scope of the corresponding claim or reference. As used herein, when the phrase "at least" is used as a transitional term in the preamble of a claim (e.g.), it ends in the same open-ended manner as the terms "comprising" and "including". The term "and / or" when used in the form of, for example, A, B, and / or C, refers to any combination or subset of A, B, C, such as (1) A alone, (2) B alone, (3) C alone, (4) A and B, (5) A and C, (6) B and C, or (7) A and B and C. As used herein in the context of describing structures, components, items, objects, and / or things, the phrase "at least one of A and B" is intended to refer to an implementation that includes any of the following: (1) at least one A, (2) at least one B, or (3) at least one A and at least one B. Similarly, as used herein in the context of describing structures, components, items, objects, and / or things, the phrase "at least one of A or B" is intended to refer to an implementation that includes any of the following: (1) at least one A, (2) at least one B, or (3) at least one A and at least one B. As used herein in the context of describing the execution or operation of processes, instructions, actions, activities, etc., the phrase "at least one of A and B" is intended to refer to an implementation that includes any of the following: (1) at least one A, (2) at least one B, or (3) at least one A and at least one B. Similarly, as used herein in the context of describing the execution or operation of processes, instructions, actions, activities, etc., the phrase “at least one of A or B” is intended to refer to an implementation that includes any one of the following: (1) at least one A, (2) at least one B, or (3) at least one A and at least one B.

[0068] As used herein, singular references (e.g., “a,” “an,” “first,” “second,” etc.) do not exclude plurals. As used herein, the term “a” or “an” refers to one or more of that object. The terms “a” (or “an”), “one or more,” and “at least one” are used interchangeably herein. Furthermore, although listed separately, multiple means, elements, or actions may be implemented by, for example, the same entity or object. Moreover, while individual features may be included in different examples or claims, they may be combined, and inclusion in different examples or claims does not imply that the combination of features is infeasible and / or disadvantageous.

[0069] As used in this patent, a statement that any component (e.g., layer, film, region, area, or plate) is located on (e.g., positioned on, located on, disposed on, or formed on, etc.) another component in any manner indicates that the mentioned component is either in contact with the other component or is on top of the other component, with one or more intermediate components between them.

[0070] As used herein, unless otherwise stated, a connection reference (e.g., attachment, coupling, connection, and joining) may include intermediate components between the elements referred to in the connection reference and / or relative movement between these elements. Therefore, a connection reference does not necessarily indicate that two elements are directly connected and / or fixed to each other. As used herein, a statement that any component is "in contact" with another component is defined as meaning that there is no intermediate component between the two components.

[0071] Unless otherwise specifically stated, descriptors such as “first,” “second,” and “third” are used herein without assigning or otherwise indicating any meaning of priority, physical order, arrangement in a list, and / or any kind of sorting, but merely as labels and / or arbitrary names to distinguish elements and facilitate understanding of the disclosed examples. In some examples, the descriptor “first” may be used to refer to an element in the detailed description, while the same element may be referred to in the claims by different descriptors, such as “second” or “third.” In such cases, it should be understood that these descriptors are used only to distinguish these elements in the context of a discussion in which elements might otherwise have, for example, had the same name (e.g., in the claims).

[0072] As can be understood from the above, example valves and example valve assemblies for valves that are easier to install and / or remove than known valve spool components have been disclosed. The examples disclosed herein also achieve better alignment between the flow control component and the seat, and therefore have improved sealing compared to known valve spool components. The example valve assemblies also have fewer parts or components than known valves, thus reducing cost and weight.

[0073] The examples and example combinations disclosed in this article are as follows:

[0074] Example 1 is a valve including a valve body defining a fluid passage between an inlet and an outlet; and a valve core assembly coupled to the valve body. The valve core assembly includes a cage having a central channel and a seat located within the fluid passage. The seat defines an orifice. The seat is coupled to the cage such that removing the cage from the valve body also removes the seat from the valve body. The valve core assembly further includes a flow control member located within the central channel of the cage. The flow control member is movable relative to the seat between an open position and a closed position.

[0075] Example 2 includes the valve described in Example 1, wherein the cage and the seat are connected by one or more ribs.

[0076] Example 3 includes the valve described in Example 2, wherein the cage, the seat, and the one or more ribs are constructed as an integral structure.

[0077] Example 4 includes the valve described in Example 2 or 3, wherein one or more radial openings are defined between the cage, the seat, and the one or more ribs.

[0078] Example 5 includes the valve of any one of Examples 1 to 4, wherein the valve core assembly includes a plug threaded to the valve body and the cage is connected to the plug.

[0079] Example 6 includes the valve described in Example 5, wherein the cage has internal threads and the plug has external threads. The cage is threaded to the plug.

[0080] Example 7 includes the valve described in Example 5 or 6, wherein the plug has an orifice. The flow control member extends into the orifice.

[0081] Example 8 includes the valve described in Example 7, wherein the valve core assembly includes: a first bushing located between the flow control member and an inner surface defining the central channel of the cage; and a second bushing located between the flow control member and an inner surface defining the orifice of the plug.

[0082] Example 9 includes the valve described in Example 7 or 8, wherein the valve core assembly includes a spring for biasing the flow control member toward the seat. The flow control member includes a disc. The spring is disposed around the disc.

[0083] Example 10 includes the valve described in Example 9, wherein the disc body has a flange. The spring is disposed between the flange of the disc body and a shoulder in the hole of the plug.

[0084] Example 11 is a valve including a valve body defining a fluid passage between an inlet and an outlet; and a valve core assembly coupled to the valve body. The valve core assembly includes a plug and a valve core body coupled to the plug. The valve core body defines a central channel. The valve core body has a first portion defining a seat; a second portion defining a cage; and one or more ribs extending between the first and second portions. The valve core body also includes a flow control member located in the central channel of the valve core body. The flow control member is movable between an open position, in which fluid flow is allowed through the seat, and in a closed position, fluid flow is blocked through the seat.

[0085] Example 12 includes the valve described in Example 11, wherein the valve core body has one or more radial openings extending between the outer surface of the valve core body and the central channel. The radial openings are defined between the first portion, the second portion, and the one or more ribs.

[0086] Example 13 includes the valve described in Example 11 or 12, wherein the valve core body is constructed as an integral structure.

[0087] Example 14 includes the valve of any one of Examples 11 to 13, wherein the valve core body is threaded to the plug, and wherein the plug is threaded to the valve body.

[0088] Example 15 includes the valve of any one of Examples 11 to 14, wherein the valve core assembly includes a spring for biasing the flow control member toward the seat. The spring is disposed around the flow control member.

[0089] Example 16 includes the valve of any one of Examples 11 to 15, wherein the valve core assembly includes: a first bushing located between the flow control member and the inner surface of the cage; and a second bushing located between the flow control member and the inner surface of the plug.

[0090] Example 17 is a valve core assembly for a valve. The valve core assembly includes a plug defining an orifice. The plug is coupled to the valve body of the valve. The valve core assembly also includes a valve core body defining a central passage. The valve core body has a first portion and a second portion connected by one or more ribs. The first portion defines a seat, the second portion defines a cage, and the second portion is coupled to the plug. The valve core assembly also includes a flow control member disposed within the orifice of the plug and the central passage of the valve core body. The flow control member is movable relative to the seat between an open position and a closed position.

[0091] Example 18 includes the valve core assembly described in Example 17, wherein a portion of the plug has external threads and the cage has internal threads. The cage is threaded to the plug.

[0092] Example 19 includes the valve core assembly described in Examples 17 and 18, wherein the valve core body is constructed as an integral structure.

[0093] Example 20 includes a valve core assembly as described in any one of Examples 17 to 19, wherein the valve core body has one or more radial openings located between the outer surface of the valve core body and the central channel.

[0094] Example 21 is a valve comprising: a valve body defining a fluid passage between an inlet and an outlet; a seat located in the fluid passage and defining an orifice; a plug coupled to the valve body defining an orifice; and a flow control member at least partially disposed in the orifice of the plug, the flow control member being movable relative to the orifice to control fluid flow through the orifice. A balancing chamber is defined in the orifice, located between an end of the flow control member and an inner surface of the orifice. The flow control member has a balancing passage extending between a first opening of the flow control member exposed to an outer surface of the fluid passage and a second opening at an end of the flow control member to achieve fluid communication between the fluid passage and the balancing chamber. The outer surface of the flow control member has an annular groove located at the position of the first opening to increase the pressure within the balancing chamber when the flow control member is in an open position.

[0095] Example 22 includes the valve described in Example 21, wherein the groove has an arcuate profile.

[0096] Example 23 includes the valve described in Example 21 or 22, wherein the balancing passage has a first portion and a second portion forming a bend.

[0097] Example 24 includes the valve described in Example 23, wherein the first portion is connected to the first opening and is transverse to the central axis of the flow control member, and the second portion is connected to the second opening and is aligned with the central axis of the flow control member.

[0098] Example 25 includes the valve of any one of Examples 21 to 24, wherein the flow control component includes: a disc body; a disc cover coupled to the disc body; and a seal coupled between the disc cover and the disc body.

[0099] Example 26 includes the valve described in Example 25, wherein the disc cover is threaded to the disc body.

[0100] Example 27 includes the valve described in Example 25 or 26, wherein the balancing passage is formed through the disc body and the disc cover.

[0101] Example 28 includes the valve described in Example 27, wherein the first opening is formed on the disc cover and the second opening is formed on the disc body.

[0102] Example 29 includes the valve of any one of Examples 21 to 28, and further includes a cage having a central channel, wherein the flow control member is disposed in the central channel of the cage, and wherein the seat is coupled to the cage such that removing the cage from the valve body also removes the seat from the valve body.

[0103] Example 30 includes the valve described in Example 29, wherein the cage and the seat are connected by one or more ribs.

[0104] Example 31 includes the valve described in Example 30, wherein the cage, the seat, and the one or more ribs are constructed as an integral structure.

[0105] Example 32 includes the valve of any one of Examples 29 to 31, wherein the cage is threaded to the plug.

[0106] Example 33 includes the valve described in any one of Examples 21 to 32, wherein the valve is a pressure regulator.

[0107] Example 34 is a valve core assembly for a valve, the valve core assembly including: a cage; a seat defining an orifice; and a flow control member slidably disposed in the cage. The flow control member is movable relative to the seat to control fluid flow through the orifice. The flow control member has a first end; a second end opposite to the first end; and an outer surface located between the first end and the second end. The flow control member has a balancing passage extending between a first opening on the outer surface and a second opening at the second end to achieve fluid communication between the fluid passage of the valve and a balancing chamber at the second end of the flow control member. The outer surface of the flow control member has an annular groove located at the position of the first opening.

[0108] Example 35 includes the valve core assembly of Example 34, wherein the flow control member includes a seal located on the outer surface, the seal engaging the seat when the flow control member is in the closed position, wherein the first opening is located between the seal and a first end of the flow control member.

[0109] Example 36 includes the valve core assembly described in Example 34 or 35, wherein the balancing passage has a first portion and a second portion, the first portion being connected to the first opening and transverse to the central axis of the flow control member, and the second portion being connected to the second opening and aligned with the central axis of the flow control member.

[0110] Example 37 includes the valve core assembly of any one of Examples 34 to 36, wherein the seat is coupled to the cage such that removing the cage from the valve also removes the seat from the valve.

[0111] Example 38 is a flow control component for a pressure regulator, the flow control component comprising: a first axial end; a second axial end opposite to the first axial end; an outer surface located between the first axial end and the second axial end; and a balancing passage extending through the flow control component between a first opening on the outer surface and a second opening at the second axial end, wherein the outer surface has an annular groove located at the position of the first opening.

[0112] Example 39 includes the flow control component described in Example 38, wherein the balancing path has a first portion and a second portion forming a bend.

[0113] Example 40 includes the flow control member described in Example 38 or 39, and further includes a disc body and a disc cover coupled to the disc body, wherein the disc cover defines a first axial end and the disc body defines a second axial end, and wherein the balancing passage extends through the disc cover and the disc body.

[0114] The following claims are incorporated herein by reference in this detailed description. While certain example systems, apparatuses, articles, and methods have been disclosed herein, the scope of this patent is not limited thereto. Rather, this patent covers all systems, apparatuses, articles, and methods that fall fully within the scope of the claims of this patent.

Claims

1. A valve, comprising: A valve body that defines a fluid passage between an inlet and an outlet; A seat, located in the fluid passage and defining an orifice; A plug connected to the valve body, the plug defining an orifice; as well as A flow control member is at least partially disposed in an orifice of a plug, the flow control member being movable relative to the orifice to control fluid flow through the orifice, wherein a balancing chamber is defined in the orifice, located between an end of the flow control member and an inner surface of the orifice, wherein the flow control member has a balancing passage extending between a first opening on an outer surface of the flow control member exposed to the fluid passage and a second opening on the end of the flow control member to achieve fluid communication between the fluid passage and the balancing chamber, wherein the outer surface of the flow control member has an annular groove located at the position of the first opening to increase the pressure within the balancing chamber when the flow control member is in an open position.

2. The valve according to claim 1, wherein, The groove has an arc-shaped profile.

3. The valve according to claim 1, wherein, The balancing pathway has a first part and a second part that form a bend.

4. The valve according to claim 3, wherein, The first portion is connected to the first opening and is transverse to the central axis of the flow control member, and the second portion is connected to the second opening and is aligned with the central axis of the flow control member.

5. The valve according to claim 1, wherein, The flow control component includes: Disk body; The disk cover connected to the disk body; and A seal is attached between the disc cover and the disc body.

6. The valve according to claim 5, wherein, The disc cover is threaded to the disc body.

7. The valve according to claim 5, wherein, The balance path is formed through the disc body and the disc cover.

8. The valve according to claim 7, wherein, The first opening is formed on the disc cover, and the second opening is formed on the disc body.

9. The valve of claim 1, further comprising a cage having a central channel, wherein, The flow control component is disposed in the central channel of the cage, and wherein the seat is connected to the cage such that removing the cage from the valve body also removes the seat from the valve body.

10. The valve according to claim 9, wherein, The cage and the seat are connected by one or more ribs.

11. The valve according to claim 10, wherein, The cage, the seat, and the one or more ribs are constructed as an integral structure.

12. The valve according to claim 9, wherein, The cage is threaded to the plug.

13. The valve according to claim 1, wherein, The valve is a pressure regulator.

14. A valve core assembly for a valve, the valve core assembly comprising: cage; A seat that defines the opening; as well as A flow control member is slidably disposed in the cage and movable relative to the seat to control the flow of fluid through the orifice. The flow control member has a first end; a second end opposite to the first end; and an outer surface located between the first end and the second end. The flow control member has a balancing passage extending between a first opening on the outer surface and a second opening on the second end to achieve fluid communication between a fluid passage of the valve and a balancing chamber located at the second end of the flow control member. The outer surface of the flow control member has an annular groove located at the position of the first opening.

15. The valve core assembly according to claim 14, wherein, The flow control member includes a seal located on the outer surface, which engages the seat when the flow control member is in the closed position, wherein the first opening is located between the seal and the first end of the flow control member.

16. The valve core assembly according to claim 14, wherein, The balancing passage has a first portion and a second portion, the first portion being connected to the first opening and transverse to the central axis of the flow control member, and the second portion being connected to the second opening and aligned with the central axis of the flow control member.

17. The valve core assembly according to claim 14, wherein, The seat is connected to the cage such that removing the cage from the valve also removes the seat from the valve.

18. A flow control component for a pressure regulator, the flow control component comprising: First axial end; The second axial end opposite to the first axial end; The outer surface located between the first axial end and the second axial end; as well as A balancing passage extends through the flow control member between a first opening on the outer surface and a second opening at the second axial end, wherein the outer surface has an annular groove located at the position of the first opening.

19. The flow control component according to claim 18, wherein, The balancing pathway has a first part and a second part that form a bend.

20. The flow control component according to claim 18, further comprising a disc body and a disc cover connected to the disc body, wherein, The disc cover defines the first axial end, and the disc body defines the second axial end, wherein the balancing passage extends through the disc cover and the disc body.

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