US20230228331A1 - Double ported control valves for low flow rate applications - Google Patents
Double ported control valves for low flow rate applications Download PDFInfo
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- US20230228331A1 US20230228331A1 US17/579,438 US202217579438A US2023228331A1 US 20230228331 A1 US20230228331 A1 US 20230228331A1 US 202217579438 A US202217579438 A US 202217579438A US 2023228331 A1 US2023228331 A1 US 2023228331A1
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- valve
- valve seat
- control element
- flow
- flow passage
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- 238000000034 method Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/246—Combination of a sliding valve and a lift valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/243—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K2200/00—Details of valves
- F16K2200/50—Self-contained valve assemblies
- F16K2200/502—Cages for valves, i.e. means to be inserted within the valve housing, surrounding and guiding the closure member
Abstract
An example method includes moving a first portion of a control element and a second portion of the control element coupled to the first portion from a closed position to an intermediate position. In the closed position, the first portion being seated against a first valve seat thereby preventing flow through a first orifice and the second portion being seated against a second valve seat thereby preventing flow through a second orifice. In the intermediate position, flow through the first orifice is deterred and flow through the second orifice is permitted. The method includes moving the first portion and the second portion from the intermediate position to an open position. In the open position, the first portion being spaced from the first valve seat thereby permitting flow through the first orifice and the second portion being spaced from the second valve seat thereby permitting flow through the second orifice.
Description
- The present patent relates generally to double ported control valves and, in particular, to double ported control valves for low flow rate applications.
- Control valves are used to control fluid flow through a flow passage. Control valves having a larger control element and/or flow orifice may be used to control higher flow rates and control valves having a smaller control element and/or flow orifice may be used to control lower flow rates.
- In accordance with a first example, a control valve includes a valve body, a valve stem, and a control element. The valve body having an inlet, an outlet, a first valve seat, and a second valve seat. The valve body defining a first flow passage extending between the inlet and the outlet through the first valve seat, and a second flow passage extending between the inlet and the outlet through the second valve seat. The valve stem extending from the valve body and arranged for sliding movement relative to the valve body. The valve stem operatively coupled to a control element having a first portion and a second portion. The first portion of the control element slidably disposed in the first flow passage adjacent to the first valve seat. The second portion of the control element slidably disposed in the second flow passage adjacent to the second valve seat. The second portion of the control element slidable in response to movement of the first portion of the control element. The control element shiftable between a closed position, an intermediate position, and an open position. When the control element is in the closed position, the first portion of the control element is seated against the first valve seat and the second portion of the control element is seated against the second valve seat thereby preventing flow through both the first flow passage and the second flow passage. When the control element is in the intermediate position at least one of the first or second portions of the control element is disposed away from its corresponding valve seat to allow flow through its corresponding valve seat while an other of the first or second portions of the control element is disposed in a position to inhibit or prevent flow through its corresponding valve seat. When the control element is in the open position the first and second portions of the control element are both disposed away from their corresponding valve seats so as to allow flow through both the first flow passage and the second flow passage.
- In accordance with a second example, a method includes moving a first portion of a control element and a second portion of the control element coupled to the first portion from a closed position to an intermediate position. In the closed position, the first portion being seated against a first valve seat thereby preventing flow through a first orifice and the second portion being seated against a second valve seat thereby preventing flow through a second orifice. In the intermediate position, flow through the first orifice is deterred and flow through the second orifice is permitted. The method includes moving the first portion and the second portion from the intermediate position to an open position. In the open position, the first portion being spaced from the first valve seat thereby permitting flow through the first orifice and the second portion being spaced from the second valve seat thereby permitting flow through the second orifice.
- In further accordance with the foregoing first and/or second examples, an apparatus and/or method may further include any one or more of the following:
- In accordance with one example, the first valve seat and the second valve seat are coaxial.
- In accordance with another example, the second portion extends from the first portion.
- In accordance with another example, the first portion and the second portion are unitary.
- In accordance with another example, the first portion comprises a plug and the second portion comprises a tapered portion and a stem tip. In the closed position, the tapered portion seats against the second valve seat and the stem tip is positioned within an orifice.
- In accordance with another example, the control valve includes a seal and a cage and a seal groove is defined between the first valve seat and the cage. The seal being received within the seal groove and positioned to seal against the first portion.
- In accordance with another example, a lower surface of the first portion includes a tapered surface that engages and urges the seal outwardly and within the seal groove when the first portion moves from the open position to the intermediate position or to the closed position.
- In accordance with another example, the control valve includes an insert including the second valve seat and having external threads that threadably engage threads of the valve body.
- In accordance with another example, the control valve includes a seal that surrounds at least a portion of the insert.
- In accordance with another example, the insert includes a head having one or more flat surfaces to enable the insert to be installed within the valve body using a tool.
- In accordance with another example, the control valve includes valve trim including the insert.
- In accordance with another example, the valve trim comprises a cylindrical body defining apertures to permit fluid to pass therethrough.
- In accordance with another example, a bottom of the valve trim is closed.
- In accordance with another example, the valve body includes an inward step and the insert has a corresponding step that engages the inward step of the valve body.
- In accordance with another example, the second portion includes a stem, a plug, a pin, and a spring.
- In accordance with another example, the stem includes a shoulder and a throughhole and the plug includes a throughhole. The spring being positioned between the shoulder of the stem and the plug and the pin extending through the throughholes to couple the plug and the stem together.
- In accordance with another example, one of the throughholes of the stem or the plug has a circular cross section and the other of the throughholes of the stem or the plug has an oblong cross section to allow the plug to be movably coupled to the stem.
- In accordance with another example, in the intermediate position, the method includes sealingly engaging the first portion with a seal positioned within a seal groove defined between the first valve seat and a cage to deter flow through the first orifice.
- In accordance with another example, the method includes moving the first portion from the open position to the intermediate position or to the closed position and outwardly urging the seal with a tapered surface of the first portion.
-
FIG. 1 illustrates an example of a double ported control valve assembled in accordance with a first disclosed example of the present invention. -
FIG. 2 illustrates the control valve ofFIG. 1 in an intermediate position with fluid flowing through a second valve seat of the control valve but fluid not flowing through a first valve seat of the control valve. -
FIG. 3 illustrates the control valve ofFIG. 1 in another intermediate position but with a second portion of a control element spaced from the second valve seat thereby allowing fluid to flow through the second valve seat of the control valve and with a first portion of the control element positioned to deter fluid flow through the first valve seat. -
FIG. 4 illustrates the control valve ofFIG. 1 in the open position with the second portion of the control element spaced from the second valve seat thereby allowing fluid flow through the second valve seat and the first portion of the control element spaced from the first valve seat thereby allowing fluid flow through the first valve seat. -
FIG. 5 is an isometric view of the insert ofFIG. 1 that can be used with the control valve ofFIG. 1 . -
FIG. 6 illustrates an example of a double ported control valve assembled in accordance with a second disclosed example of the present invention. - Although the following text discloses a detailed description of example methods, apparatus and/or articles of manufacture, it should be understood that the legal scope of the property right is defined by the words of the claims set forth at the end of this patent. Accordingly, the following detailed description is to be construed as examples only and does not describe every possible example, as describing every possible example would be impractical, if not impossible. Numerous alternative examples could be implemented, using either current technology or technology developed after the filing date of this patent. It is envisioned that such alternative examples would still fall within the scope of the claims.
- Referring now to the drawings,
FIG. 1 illustrates an example of a double portedcontrol valve 100 assembled in accordance with a first disclosed example of the present invention. Thecontrol valve 100 includes avalve body 102 including aninlet 104, anoutlet 106, afirst valve seat 108, and asecond valve seat 110. Thefirst valve seat 108 and thesecond vale seat 110 are shown being coaxial. - The
valve body 102 also has afirst flow passage 112 extending between theinlet 104 and theoutlet 106 through thefirst valve seat 108 and asecond flow passage 114 extending between theinlet 104 and theoutlet 106 through thesecond valve seat 110. Avalve stem 116 of thecontrol valve 100 is operatively coupled to acontrol element 118 having afirst portion 120 and asecond portion 122 and extending from thevalve body 102 and arranged for sliding movement relative to thevalve body 102. Thefirst portion 120 of thecontrol element 118 is slidably disposed in thefirst flow passage 112 adjacent to thefirst valve seat 108 and thesecond portion 122 of thecontrol element 118 is slidably disposed in thesecond flow passage 114 adjacent to thesecond valve seat 110 and slidable in response to movement of thefirst portion 120 of thecontrol element 118. - The
control element 118 is shiftable between a closed position shown inFIG. 1 , an intermediate position shown inFIGS. 2 and 3 , and an open position shown inFIG. 4 . Thefirst portion 120 of thecontrol element 118 is seated against thefirst valve seat 108 and thesecond portion 122 of thecontrol element 118 is seated against thesecond valve seat 110 when thecontrol element 118 is in the closed position thereby preventing flow through both thefirst flow passage 112 and thesecond flow passage 114. When thecontrol element 118 is in the intermediate position, thesecond portion 122 of thecontrol element 118 is disposed away from thesecond valve seat 110 to allow flow through thesecond valve seat 110 while thefirst portion 120 of thecontrol element 118 is disposed in a position to inhibit or prevent flow through thefirst valve seat 108. The first andsecond portions control element 118 are both disposed away from theircorresponding valve seats control element 118 is in the open position so as to allow flow through both thefirst flow passage 112 and thesecond flow passage 114. Thesecond portion 122 can be used to permit a lesser amount of fluid flow through thecontrol valve 100 when thecontrol element 118 is in the intermediate position and in the open position and thefirst portion 120 can be used to permit a greater amount of fluid flow through thecontrol valve 100 when thecontrol element 118 is in the open position. - The
control valve 100 also includes acage 124 and abonnet 126. Thecage 124 is disposed within thevalve body 102 and has acentral bore 130, anupper portion 132, and alower portion 134. Thelower portion 134 is seated against thefirst valve seat 108 and theupper portion 132 of thecage 124 is retained within thevalve body 102 and/or urged in a direction generally indicated byarrow 135 by thebonnet 126. Thebonnet 126 is coupled to thevalve body 102 byfasteners 136. A height of thefirst valve seat 108 may be such to allow thefirst portion 120 to move upward (see, for example,FIG. 2 ) while still inhibiting or preventing fluid flow through thefirst valve seat 108 and a height of aneck 138 of thevalve body 102 and/or a height of thecage 124 may be sized to accommodate for the height of thefirst valve seat 108 accordingly. - The
first portion 120 is slidably received in thecentral bore 130 of thecage 124 and is coupled to thesecond portion 122. Thefirst portion 120 and thefirst valve seat 108 have a larger diameter and are used to flow a larger amount of fluid through thecontrol valve 100 and thesecond portion 122 and thesecond valve seat 110 have a smaller diameter and are used to flow a smaller amount of fluid through thecontrol valve 100. Thefirst portion 120 is thus used for higher flow rate applications and thesecond portion 122 is used for lower flow rate applications. - The first and
second portions first portion 120 is aplug 140 and, specifically, a pressure balanced plug, and thesecond portion 122 extends from thefirst portion 120 into the both thefirst flow path 112 and thesecond flow path 114 in the example shown. Thesecond portion 122 includes astem 142, a taperedportion 144, and astem tip 146, where thestem 142 extends from alower surface 148 of theplug 140 and is positioned between theplug 140 and the taperedportion 144. Theplug 140 seats against thefirst valve seat 108 in the closed position and as shown (FIG. 1 ), the taperedportion 144 seats against thesecond valve seat 110, and thestem tip 146 is positioned within anorifice 149 of thesecond valve seat 110. While the plug 141 is shown as a pressure balanced plug, the plug 141 may not be a pressure balanced plug. - Referring to an
interface 150 between thecage 124 and thefirst valve seat 108, aseal groove 152 is defined between thefirst valve seat 108 and thecage 124 and aseal 154 is received within theseal groove 152. Theseal 154 is positioned to seal against thefirst portion 120 when thecontrol valve 100 is in the intermediate position to inhibit or prevent flow through thevalve seat 108. Theseal 154 may be any suitable seal commonly employed in the art. Theseal 154 is preferably a C-seal that is arranged to be pressurized by the fluid to encourage theseal 154 to sealingly engage the first control element 128 and prevent or deter fluid flow through thefirst valve seat 108 when thecontrol valve 100 is in the intermediate position. - The
interface 150 between thecage 124 and thefirst valve seat 108 on the left side of thecontrol valve 100 is shown as being a first stepped interface and theinterface 150 between thecage 124 and thefirst valve seat 108 on the right side of thecontrol valve 100 is shown as being a second stepped interface. Both the first side and the second side of theinterface 150 may be the same in practice, however. The first stepped interface shown on the left side of thecontrol valve 100 may allow theseal 154 to be more easily installed within theseal groove 152 as compared to the stepped interface shown on the right side of thecontrol valve 100. - Still referring to the
seal 154 and thefirst portion 120, thelower surface 148 of thefirst portion 120 has a tapered surface 156 that is arranged to engage and urge theseal 154 outwardly and within theseal groove 152 when thefirst portion 120 moves from the open position to the intermediate position or to the closed position in a direction generally indicated byarrow 135. The tapered surface 156 may be between approximately 7.5° and approximately 8.5°. Other angles may prove suitable, however. - Referring to the
second valve seat 110, aninsert 158 is provided that includes thesecond valve seat 110 and hasexternal threads 159 that threadably engagethreads 160 of thevalve body 102. Aseal 161 may surround at least a portion of theinsert 158 and deters flow between theinsert 158 and thevalve body 102. - The
insert 158 includes ahead 162 and astep 163 and is part ofvalve trim 164 that extends into thesecond flow passage 114. Thehead 162 has one or more flat surfaces that form a hexagon to enable theinsert 158 to be installed within thevalve body 102 using a tool. While a hexagon is mentioned, the flat surfaces may form any other shape. - The
step 163 of theinsert 158 engages a corresponding inward facingstep 165 of thevalve body 102 and thevalve trim 164 has acylindrical body 166 and a bottom 168. Thecylindrical body 166 definesapertures 170 that allow fluid to pass through theapertures 170 and the bottom 168 is closed and/or does not include apertures. Closing the bottom 168 may prevent the flow of fluid through thebottom 168 of thevalve trim 164. Theapertures 170 and/or thevalve trim 164 may be arranged to reduce cavitation and/or to attenuate noise. While theinsert 158 is shown including thevalve trim 164, in other examples, such as, when thecontrol valve 100 is arranged in a flow down arrangement, thevalve trim 164 may be omitted (see, for example,FIG. 6 ). -
FIGS. 2, 3 and 4 illustrate thecontrol valve 100 ofFIG. 1 in different positions.FIG. 2 illustrates thecontrol valve 100 ofFIG. 1 in the intermediate position with the fluid flowing through thesecond valve seat 110 of thecontrol valve 100 but fluid not flowing through thefirst valve seat 108 of thecontrol valve 100. As shown, the taperedportion 144 of thesecond portion 122 is spaced from thesecond valve seat 110 and thestem tip 146 is partially positioned within theorifice 149, thereby reducing some of the flow through thesecond valve seat 110. -
FIG. 3 illustrates thecontrol valve 100 ofFIG. 1 in another intermediate position but with thesecond portion 122 spaced from thesecond valve seat 110 thereby allowing fluid to flow through thesecond valve seat 110 of thecontrol valve 100 and with thefirst portion 120 positioned to prevent or inhibit fluid flow through thefirst valve seat 108. Thestem tip 146 is spaced from thesecond valve seat 110 and thefirst portion 120 is positioned to allow the fluid to load theseal 154 inFIG. 3 such that theseal 154 is urged into engagement with theplug 140 and in contrast to the position of theportions FIG. 2 , thereby deterring flow through thefirst valve seat 108. -
FIG. 4 illustrates thecontrol valve 100 ofFIG. 1 in the open position with thesecond portion 122 spaced from thesecond valve seat 110, thereby allowing fluid flow through thesecond valve seat 110 and thefirst portion 120 spaced from thefirst valve seat 108 thereby allowing fluid flow through thefirst valve seat 108. -
FIG. 5 is an isometric view of theinsert 158 ofFIG. 1 that can be used with thecontrol valve 100 ofFIG. 1 . Theinsert 158 includes theexternal threads 159, thehead 162 hasflat surfaces 172, thecylindrical body 166 defines theapertures 170, and the bottom 168. Theapertures 170 are shown being arranged in a slightly staggered arrangement. Theapertures 170 may be, however, positioned in any other arrangement. -
FIG. 6 illustrates an example double portedcontrol valve 200 assembled in accordance with a second disclosed example of the present invention. Thecontrol valve 200 ofFIG. 6 is similar to thecontrol valve 100 ofFIG. 1 . The control valve ofFIG. 6 , in contrast however, includes an alternativesecond portion 202 and analternative insert 204. Thesecond portion 202 includes thestem 142, aplug 205, apin 206, and abiasing element 208 in the example shown. Thestem 142 includes ashoulder 210 and a throughhole 212 and theplug 205 has a throughhole 214 that aligns with thethroughhole 212 of thestem 142 to allow thepin 206 to extend through thethroughholes plug 205 and thestem 142 together. The biasingelement 208 is positioned between theshoulder 210 of thestem 142 and theplug 205 to urge theplug 205 in a direction generally indicated byarrow 216. The biasingelement 208 is shown being a Belleville washer. Other types of biasing elements/springs may prove suitable, however. - The
throughole 214 of theplug 205 has an oblong cross section and thethroughhole 212 of thestem 142 has a circular cross section in the example shown, thereby allowing theplug 205 to move relative to thestem 142. Allowing theplug 205 to move relative to thestem 142 compensates for manufacturing tolerances that may affect the ability of the first andsecond portions corresponding valve seats stem 142 or theplug 205, however, may have throughholes having a circular and/or an oblong cross section and/or may be coupled in any suitable way to allow relative movement between the components. - Referring to the
insert 204 ofFIG. 6 , theinsert 204 is similar to the insert 157 ofFIG. 1 . Theinsert 204 ofFIG. 6 , in contrast however, does not include the lower portion of thevalve trim 164 having theapertures 170 and has anorifice insert 218 that forms thesecond valve seat 110. Theorifice insert 218 may be made of a harder material such as a carbide insert and may be retained within theinsert 204 by an interference fit. Other materials may prove suitable, however, and theorifice insert 218 may be coupled to theinsert 204 in different ways. - Further, while several examples have been disclosed herein, any features from any examples may be combined with or replaced by other features from other examples. Moreover, while several examples have been disclosed herein, changes may be made to the disclosed examples without departing from the scope of the claims.
Claims (20)
1. A control valve, comprising:
a valve body having an inlet, an outlet, a first valve seat, and a second valve seat;
the valve body defining a first flow passage extending between the inlet and the outlet through the first valve seat, and a second flow passage extending between the inlet and the outlet through the second valve seat;
a valve stem extending from the valve body and arranged for sliding movement relative to the valve body, the valve stem operatively coupled to a control element having a first portion and a second portion;
the first portion of the control element slidably disposed in the first flow passage adjacent to the first valve seat;
the second portion of the control element slidably disposed in the second flow passage adjacent to the second valve seat, the second portion of the control element slidable in response to movement of the first portion of the control element;
the control element shiftable between a closed position, an intermediate position, and an open position;
wherein, when the control element is in the closed position, the first portion of the control element is seated against the first valve seat and the second portion of the control element is seated against the second valve seat thereby preventing flow through both the first flow passage and the second flow passage,
wherein, when the control element is in the intermediate position, at least one of the first or second portions of the control element is disposed away from its corresponding valve seat to allow flow through its corresponding valve seat while another of the first or second portions of the control element is disposed in a position to inhibit or prevent flow through its corresponding valve seat; and
wherein, when the control element is in the open position, the first and second portions of the control element are both disposed away from their corresponding valve seats so as to allow flow through both the first flow passage and the second flow passage; and
further comprising a seal and a cage, and wherein a seal groove is defined between the first valve seat and the cage, the seal being received within the seal groove and positioned to seal against the first portion.
2. The control valve of claim 1 , wherein the first valve seat and the second valve seat are coaxial.
3. The control valve of claim 1 , wherein the second portion extends from the first portion.
4. The control valve of claim 1 , wherein the first portion and the second portion are unitary.
5. The control valve of claim 1 , wherein the first portion comprises a plug and the second portion comprises a tapered portion and a stem tip, wherein in the closed position, the tapered portion seats against the second valve seat and the stem tip is positioned within an orifice.
6. (canceled)
7. The control valve of claim 1 , wherein a lower surface of the first portion comprises a tapered surface that engages and urges the seal outwardly and within the seal groove when the first portion moves from the open position to the intermediate position or to the closed position.
8. The control valve of claim 1 , further comprising an insert comprising the second valve seat and having external threads that threadably engage threads of the valve body.
9. The control valve of claim 8 , further comprising a seal that surrounds at least a portion of the insert.
10. The control valve of claim 8 , wherein the insert comprises a head having one or more flat surfaces to enable the insert to be installed within the valve body using a tool.
11. The control valve of claim 8 , further comprising valve trim including the insert.
12. The control valve of claim 11 , wherein the valve trim comprises a cylindrical body defining apertures to permit fluid to pass therethrough.
13. A control valve, comprising:
a valve body having an inlet, an outlet, a first valve seat, and a second valve seat;
the valve body defining a first flow passage extending between the inlet and the outlet through the first valve seat, and a second flow passage extending between the inlet and the outlet through the second valve seat;
a valve stem extending from the valve body and arranged for sliding movement relative to the valve body, the valve stem operatively coupled to a control element having a first portion and a second portion;
the first portion of the control element slidably disposed in the first flow passage adjacent to the first valve seat;
the second portion of the control element slidably disposed in the second flow passage adjacent to the second valve seat, the second portion of the control element slidable in response to movement of the first portion of the control element;
the control element shiftable between a closed position, an intermediate position, and an open position;
wherein, when the control element is in the closed position, the first portion of the control element is seated against the first valve seat and the second portion of the control element is seated against the second valve seat thereby preventing flow through both the first flow passage and the second flow passage,
wherein, when the control element is in the intermediate position, at least one of the first or second portions of the control element is disposed away from its corresponding valve seat to allow flow through its corresponding valve seat while another of the first or second portions of the control element is disposed in a position to inhibit or prevent flow through its corresponding valve seat; and
wherein, when the control element is in the open position, the first and second portions of the control element are both disposed away from their corresponding valve seats so as to allow flow through both the first flow passage and the second flow passage;
an insert comprising the second valve seat and having external threads that threadably engage threads of the valve body and including valve trim including the insert, wherein the valve trim comprises a cylindrical body defining apertures to permit fluid to pass therethrough, and wherein a bottom of the valve trim is closed.
14. The control valve of claim 8 , wherein the valve body comprises an inward step and the insert has a corresponding step that engages the inward step of the valve body.
15. The control valve of claim 1 , wherein the second portion comprises a stem, a plug, a pin, and a spring.
16. A control valve, comprising:
a valve body having an inlet, an outlet, a first valve seat, and a second valve seat;
the valve body defining a first flow passage extending between the inlet and the outlet through the first valve seat, and a second flow passage extending between the inlet and the outlet through the second valve seat;
a valve stem extending from the valve body and arranged for sliding movement relative to the valve body, the valve stem operatively coupled to a control element having a first portion and a second portion;
the first portion of the control element slidably disposed in the first flow passage adjacent to the first valve seat;
the second portion of the control element slidably disposed in the second flow passage adjacent to the second valve seat, the second portion of the control element slidable in response to movement of the first portion of the control element;
the control element shiftable between a closed position, an intermediate position, and an open position;
wherein, when the control element is in the closed position, the first portion of the control element is seated against the first valve seat and the second portion of the control element is seated against the second valve seat thereby preventing flow through both the first flow passage and the second flow passage,
wherein, when the control element is in the intermediate position, at least one of the first or second portions of the control element is disposed away from its corresponding valve seat to allow flow through its corresponding valve seat while another of the first or second portions of the control element is disposed in a position to inhibit or prevent flow through its corresponding valve seat; and
wherein, when the control element is in the open position, the first and second portions of the control element are both disposed away from their corresponding valve seats so as to allow flow through both the first flow passage and the second flow passage; and
wherein the second portion comprises a stem, a plug, a pin, and a spring; and
further wherein the stem comprises a shoulder and a throughhole and the plug comprises a throughhole, the spring being positioned between the shoulder of the stem and the plug and the pin extending through the throughholes to couple the plug and the stem together.
17. The control valve of claim 16 , wherein one of the throughholes of the stem or the plug has a circular cross section and the other of the throughholes of the stem or the plug has an oblong cross section to allow the plug to be movably coupled to the stem.
18. A method, comprising:
moving a first portion of a control element and a second portion of the control element coupled to the first portion from a closed position to an intermediate position, in the closed position, the first portion being seated against a first valve seat thereby preventing flow through a first orifice and the second portion being seated against a second valve seat thereby preventing flow through a second orifice, in the intermediate position, flow through the first orifice is deterred and flow through the second orifice is permitted; and
moving the first portion and the second portion from the intermediate position to an open position, in the open position, the first portion being spaced from the first valve seat thereby permitting flow through the first orifice and the second portion being spaced from the second valve seat thereby permitting flow through the second orifice; and
wherein, in the intermediate position, further including sealingly engaging the first portion with a seal positioned within a seal groove defined between the first valve seat and a cage to deter flow through the first orifice.
19. (canceled)
20. The method of claim 18 , further comprising moving the first portion from the open position to the intermediate position or to the closed position and outwardly urging the seal with a tapered surface of the first portion.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/579,438 US11719345B1 (en) | 2022-01-19 | 2022-01-19 | Double ported control valves for low flow rate applications |
CN202310074614.3A CN116464786A (en) | 2022-01-19 | 2023-01-18 | Dual port control valve for low flow applications |
CN202320142648.7U CN220016085U (en) | 2022-01-19 | 2023-01-18 | Control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US17/579,438 US11719345B1 (en) | 2022-01-19 | 2022-01-19 | Double ported control valves for low flow rate applications |
Publications (2)
Publication Number | Publication Date |
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US20230228331A1 true US20230228331A1 (en) | 2023-07-20 |
US11719345B1 US11719345B1 (en) | 2023-08-08 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US17/579,438 Active US11719345B1 (en) | 2022-01-19 | 2022-01-19 | Double ported control valves for low flow rate applications |
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Country | Link |
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US (1) | US11719345B1 (en) |
CN (2) | CN116464786A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3435850A (en) * | 1966-03-21 | 1969-04-01 | Arca Premoncontrole | Fluid regulator valve |
US3821968A (en) * | 1973-01-26 | 1974-07-02 | Acf Ind Inc | Control valve structure having double ports |
US5156181A (en) * | 1991-07-22 | 1992-10-20 | Allied-Signal Inc. | Removable seats for a dual poppet valve |
US6928995B1 (en) * | 2004-02-24 | 2005-08-16 | Siemens Vdo Automotive, Inc. | Emission control valve having improved force-balance and anti-coking |
US9354638B2 (en) * | 2014-03-27 | 2016-05-31 | Emerson Process Management Regulator Technologies, Inc. | Double port pressure regulator with floating seat |
-
2022
- 2022-01-19 US US17/579,438 patent/US11719345B1/en active Active
-
2023
- 2023-01-18 CN CN202310074614.3A patent/CN116464786A/en active Pending
- 2023-01-18 CN CN202320142648.7U patent/CN220016085U/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3435850A (en) * | 1966-03-21 | 1969-04-01 | Arca Premoncontrole | Fluid regulator valve |
US3821968A (en) * | 1973-01-26 | 1974-07-02 | Acf Ind Inc | Control valve structure having double ports |
US5156181A (en) * | 1991-07-22 | 1992-10-20 | Allied-Signal Inc. | Removable seats for a dual poppet valve |
US6928995B1 (en) * | 2004-02-24 | 2005-08-16 | Siemens Vdo Automotive, Inc. | Emission control valve having improved force-balance and anti-coking |
US9354638B2 (en) * | 2014-03-27 | 2016-05-31 | Emerson Process Management Regulator Technologies, Inc. | Double port pressure regulator with floating seat |
Also Published As
Publication number | Publication date |
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CN116464786A (en) | 2023-07-21 |
CN220016085U (en) | 2023-11-14 |
US11719345B1 (en) | 2023-08-08 |
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