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WO2010117361A1 - Vanne de commande de fluide - Google Patents

Vanne de commande de fluide Download PDF

Info

Publication number
WO2010117361A1
WO2010117361A1 PCT/US2009/039822 US2009039822W WO2010117361A1 WO 2010117361 A1 WO2010117361 A1 WO 2010117361A1 US 2009039822 W US2009039822 W US 2009039822W WO 2010117361 A1 WO2010117361 A1 WO 2010117361A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve body
fluid
fluid passage
opening
Prior art date
Application number
PCT/US2009/039822
Other languages
English (en)
Inventor
Anthony Gene Majka
James C. Casey
Ken Paradis
Original Assignee
Flowserve Management Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flowserve Management Company filed Critical Flowserve Management Company
Priority to PCT/US2009/039822 priority Critical patent/WO2010117361A1/fr
Publication of WO2010117361A1 publication Critical patent/WO2010117361A1/fr

Links

Classifications

    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means

Definitions

  • the present invention relates generally to fluid control valves, and more particularly, to valves capable of controlling low flow rates.
  • BACKGROUND Industrial fluid delivery systems routinely include one or more fluid valves configured to control the rate of, or completely terminate, fluid flow through the system.
  • a conventional ball valve generally includes a valve body having a fluid passageway therethrough.
  • a ball or ball element is positioned within the valve body so as to be placed in the fluid passageway.
  • the ball in a conventional ball valve has its own fluid conduit extending therethrough and defining a flow path through the ball.
  • a ball valve is usually actuated or rotated through a stem which passes through the valve body and attaches to the ball.
  • a handle or some other means, such as a gear, may be attached to the opposite end of the stem in order to turn the stem.
  • the amount of fluid passing through the ball valve changes as the ball rotates.
  • a particular angular orientation of the ball corresponds to a particular degree of alignment between the conduit and the passageway, which in turn corresponds to the flow rate.
  • the conventional plug typically includes a fluid conduit extending therethrough and defining a flow path through the plug.
  • the conduit in the plug When the conduit in the plug is aligned with the fluid passageway through the valve body, fluid may flow through the valve generally unimpeded. If the plug is rotated such that the plug's conduit is out of alignment with the valve body passageway, then the flow is restricted.
  • a valve In certain fluid control applications, a valve must be configured to control a low flow-rate of fluid.
  • a ball valve When a ball valve is employed for such low- flow applications, the conduit through the ball is typically modified and/or a specially designed port is cut into a seat. Such modifications are both costly and limited in their ability to control the fluid.
  • these conventional valves typically are unable to control the flow capacity of the valve over a significant range.
  • Conventional valves historically have been unable to control the flow capacity of the valve at rates that are significantly less than the maximum or full "on" position. In other words, as the flow capacity is gradually reduced from the maximum, the conventional valves quickly lose their ability to control that flow capacity.
  • alternate and more expensive valves are employed, such as a rising-stem valve.
  • the present invention includes a valve body and a valve member secured within the valve body.
  • the valve member may comprise a first fluid passage portion and a second fluid passage portion.
  • the first fluid passage portion may be configured to allow fluid to communicate between a first opening in the valve body and a cavity formed between the valve body and the valve member.
  • the second fluid passage portion may be configured to allow fluid to communicate between the cavity and a second opening in the valve body.
  • At least one of the first fluid passage portion and the second fluid passage portion may comprise a recessed portion on the surface of the valve member.
  • the present invention includes methods of controlling flow volume through a fluid conduit system.
  • a valve may be installed in a conduit system.
  • the valve may comprise a valve body and a valve member comprising a first fluid passage feature and a second fluid passage feature.
  • the valve member may be rotated so the first fluid passage feature is in communication with a first opening in the valve body and a cavity formed between the valve body and the valve member.
  • the second fluid passage feature may be in communication with both the cavity and the second opening in a valve body.
  • a fluid may be flowed from the first opening into the cavity through the first fluid passage feature and from the cavity into the second opening through the second fluid passage feature.
  • the present invention may include a fluid control system comprising a valve and an actuator.
  • the valve may comprise a valve body and a valve member rotatably secured within the valve body.
  • the valve member may comprise a first fluid passage portion and a second fluid passage portion.
  • the first fluid passage portion maybe configured to allow fluid to communicate between a first opening in the valve body and a cavity formed between the valve body and the valve member.
  • the second fluid passage portion maybe configured to allow fluid to communicate between the cavity and a second opening in the valve body.
  • At least one of the first fluid passage portion and the second fluid passage portion may comprise a recessed portion on the surface of the valve member.
  • An actuator maybe controllably coupled to an actuation shaft connected to the valve member.
  • a positioner may be coupled to the actuator.
  • FIG. 1 is an isometric and partially sectioned view of one embodiment of a ball valve.
  • FIG. 2 is a cross-sectional view of a ball valve according to one embodiment.
  • FIGS. 3A-3D are side views of various non-limiting embodiments of balls illustrating various configurations of the different recessed portions of the balls.
  • FIG. 3E is a cross-sectioned view of a ball according to one embodiment showing a recessed portion comprising a groove including a varying depth.
  • FIG. 4 is a sectional view similar to FIG. 2 illustrating fluid flow through a ball valve according to one embodiment of the present invention.
  • FIG. 5 is a side view of a ball valve according to one embodiment of the invention illustrating the first fluid passage feature positioned partially within the first opening.
  • FIG. 6 is a cross-sectional view of the ball taken along lines 6-6 in FIG. 4.
  • FIG. 7 A is a side view of a ball according to one embodiment comprising a bore formed through the central portion of the ball.
  • FIG. 7B is a top view of the ball in FIG. 7 A.
  • FIG. 8 is a cross-sectional view of a ball similar to FIG. 6 according to one embodiment comprising a bore formed through the central portion of the ball.
  • FIG. 9 is a sectional view similar to FIG. 4 illustrating fluid flow through a ball valve according to one embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of the ball taken along lines 10-10 in FIG. 9.
  • FIG. 11 is a system diagram of a fluid control system according to an embodiment of the present invention.
  • FIG. 1 illustrates a partially-sectioned isometric view of an embodiment of a valve configured as a ball valve 100.
  • the ball valve 100 includes a valve body 110 having a fluid passageway 120 extending from an inlet or first opening 130 to an outlet or second opening 140.
  • the valve body 110 of the embodiment in FIG. 1 is depicted as a single piece flanged body. However, those of ordinary skill in the art will recognize that various body configurations are possible.
  • valve body 110 may also comprise a single piece body, a two-piece body, a three-piece body, a top entry body, a floating ball body, a trunion ball body, or any other suitable configuration.
  • the fluid passageway 120 may include a generally cylindrical hole.
  • valve member 150 is secured within the valve body 110 and positioned in a chamber or cavity 160 (see FIG. 2) in the fluid passageway 120.
  • valve member 150 will be referred to as ball 150 hereinafter for clarity to the reader and should not be interpreted as limiting the disclosure.
  • the ball 150 is positioned so as to allow rotation within the cavity 160.
  • Supporting the ball 150 within the valve body 110 are seats or seals 170.
  • Each seal 170 comprises a generally cylindrical-shaped structure with a cylindrical aperture extending therethrough and positioned to contact the ball 150 along a continuous circumferential contact region 180. The interference between the seals 170 and the outer surface of the ball 150 at the contact region 180 prevents fluid present in the fluid passageway 120 from leaking into the cavity 160 when the valve is in the closed position, as will be discussed in more detail below.
  • the ball 150 may further comprise a coupling mechanism 190 configured for attachment of one end of an actuation shaft 200 to the ball 150.
  • the actuation shaft 200 and the ball 150 may comprise an integral piece.
  • the actuation shaft 200 may be coupled to a conventional lever, handle or other mechanism (not shown) as is known to those of ordinary skill in the art to provide for manual and/or automated rotation of the actuation shaft 200.
  • the actuation shaft 200 may be coupled to any conventional automated mechanism (not shown) commonly known to those of ordinary skill in the art for automatically controlling the rotation of actuation shaft 200.
  • the actuation shaft 200 may be coupled to a conventional actuator and/or a conventional positioner.
  • FIG. 2 is a cross-sectional view of the ball valve 100 according to one embodiment.
  • the ball 150 comprises two fluid passage features to allow fluid to communicate between the cavity 160 and the fluid passageway 120.
  • a first fluid passage feature 210 may be configured to allow fluid to communicate between the first opening 130 and the cavity 160.
  • a second fluid passage feature 220 may be configured to allow fluid to communicate between the cavity 160 and the second opening 140.
  • the first and second fluid passage features 210, 220 may be positioned on approximately opposite sides of the ball 150.
  • first and second fluid passage features 210, 220 may be positioned at approximately 180° from one another in substantially the same plane of the ball 150.
  • the first and second fluid passage features 210, 220 may be configured to control the progression of the flow coefficient in relation to the degree of angular rotation of the actuation shaft 200 from the closed position to a full open position.
  • the first fluid passage feature 210 may comprise a recess or recessed portion 230 in the surface of the ball 150.
  • the recessed portion 230 may comprise a groove formed in the outer surface of the ball 150 and configured to allow fluid from the first opening 130 to pass into the cavity 160 between the seal 170 and the ball 150.
  • the recessed portion 230 may be configured to customize the flow coefficient and/or the capacity of the valve in relation to the degree of angular rotation of the ball 150.
  • the recessed portion 230 may comprise a groove configured generally in the shape of a triangle. The triangular shape may provide a generally linear increase in the flow coefficient in relation to the degree of angular rotation of the ball 150.
  • Some embodiments of the invention comprise a second fluid passage feature 220 configured as a second recessed portion 240. Similar to the recessed portion 230, the second recessed portion 240 may comprise a groove formed in the outer surface of the ball 150 and configured to allow fluid to pass from the cavity 160 into the second opening 140. As illustrated in the embodiment shown in FIG. 2, the second recessed portion 240 may comprise a groove having a constant width and depth, so as to provide a constant flow coefficient and/or capacity in relation to the degree of angular rotation of the ball 150.
  • the second recessed portion 240 may comprise a groove configured generally in the shape of a rectangle.
  • the constant width and depth may be dimensioned to provide an upper limit to the flow coefficient. In other embodiments, however, the second recessed portion 240 may be configured to customize the flow coefficient and/or capacity in relation to the degree of angular rotation of the ball 150.
  • rangeability refers to the capacity of the valve in the "wide-open" configuration or maximum flow capacity divided by the valve's minimum controllable flow capacity.
  • the ball valve of the present invention may be capable of controlling flow capacities which are significantly lower than the valve's maximum flow capacity.
  • FIGS. 3 A-3D illustrate various configurations of the recessed portion 230 and/or the second recessed portion 240, provided by way of example and not limitation. For each of the following examples, only one side of the ball 150 is shown. However, it will be understood by those of ordinary skill in the art that the ball 150 may be configured such that either one or both of the recessed portion 230 and the second recessed portion 240 maybe configured according to any of the following examples.
  • FIG. 3 A illustrates one embodiment of a ball 150 in which at least one of the recessed portion 230 and the second recessed portion 240 comprises a groove configured in a generally triangular shape comprising a vertex 250A positioned at a rotationally forward most point on the ball 150 with relation to the rest of the recessed portion.
  • a first side 260A and a second side 270A extend in a direction D rotationally away from the vertex 250A in substantially straight lines. Therefore, as the ball 150 is rotated by turning actuation shaft 200 in the direction of the arrow, the vertex 250A provides an initial gap beneath the seal through which fluid may flow.
  • the distance between the first side 260A and the second side 270A gets larger. Therefore, the gap beneath the seal also gets larger.
  • Such a configuration may provide a linear progression of flow rate as the ball 150 is rotated. In other words, the change in flow rate starting from the minimum flow rate (e.g., when the size of the gap beneath the seal is at its smallest) and growing to the maximum flow rate (e.g., when the size of the gap beneath the seal is at its greatest) is substantially linear in relation to the rotation of the ball 150.
  • the recessed portion 230 may include a groove having a depth that varies.
  • FIG. 3E illustrates such a groove having a varying depth, with respect to a generally triangular shaped groove.
  • the depth of the groove may be more shallow at the vertex 250A and may increase in a linear fashion with respect to the distance from the vertex 250A in direction D, such as that illustrated in FIG. 3 E.
  • the depth of the groove may start relatively shallow at or near the vertex 250A and may increase in a non-linear fashion with respect to the distance from the vertex 250A in direction D.
  • the depth of the groove may start at a depth at or near the vertex 250A and may decrease or grow shallower in either a linear or non-linear fashion with respect to the distance from the vertex 250A in direction D.
  • the groove is described as generally triangular shaped, those of ordinary skill in the art will recognize that such a groove having varying depth may be employed in a variety of shapes and configurations, including, but not limited to, rectangular, square, triangular, as well as other suitable shapes.
  • FIG. 3B shows another configuration in which, similar to FIG. 3 A, the groove comprises a generally triangular shape comprising a vertex 250B with a first side 260B and a second side 270B extending rotationally away from the vertex 250B.
  • the first side 260B and second side 270B extend generally arcuately outward as they extend away from a common vertex 250B.
  • the first side 260B and the second side 270B flare outward from each other as they extend away from the vertex 250B.
  • Such a configuration may provide a non-linear progression of flow rate in relation to the rotation of the ball 150.
  • such a configuration may be formed to provide a substantially linear progression of flow rate.
  • FIG. 3 C shows another configuration in which the groove comprises a generally triangular shape comprising a vertex 250C with a first side 260C and a second side 270C extending rotationally away from the vertex 250C.
  • the first side 260C and the second side 270C may extend generally arcuately inward as they extend away from the common vertex 250C.
  • Such an embodiment may also be described as being generally bullet-shaped. Similar to the embodiment described in FIG. 3B, this configuration may provide a non-linear progression of flow rate in relation to the rotation of the ball 150.
  • FIG. 3D shows still another embodiment in having a dual-gain configuration.
  • the groove may comprise a generally triangular shape comprising a vertex 250D with a first side and a second side.
  • the first side may comprise a rotationaily forward first side 260D' and a rotationally rearward first side 260D".
  • the second side may comprise a rotationally forward second side 270D' and a rotationally rearward second side 270D".
  • the forward first side 260D' and the forward second side 270D' may have a shallower angle as they extend away from the vertex 250D.
  • This portion of the groove may provide a linear progression of flow rate in relation to the rotation of the ball 150.
  • the rearward first side 260D" and the rearward second side 270D" may intersect with the relative forward first or second side and extend away from that intersection at a steeper angle.
  • This second portion of the groove defined between the rearward first and second sides 260D” and 270D” may also provide a linear progression of flow rate in relation to the rotation of the ball 150. However, this second portion may comprise a greater progression of flow rate than the portion defined by the forward first and second sides 260D' and 270D'.
  • the ball 150 may comprise any kind of material known to those of ordinary skill in the art and may be selected according to the specific application.
  • the ball 150 may comprise metal, metal alloy, ceramic, or plastic.
  • a non-limiting example of a suitable metal includes carbon steel or stainless steel.
  • the recessed portion 230 may be formed in the body of the ball 150 by any means known to those of ordinary skill in the art.
  • a recessed portion 230 may be formed by machining or casting. Referring to FIG. 4, the first opening 130 of the fluid passageway 120 may be filled with a process media or fluid flowing in the direction of arrows 280.
  • FIG. 5 shows a side view of the ball valve 100 illustrating the first fluid passage feature 210 positioned partially within the first opening 130.
  • the second fluid passage feature 220 is configured to extend between the cavity 160 and the second opening 140. As the fluid flows into the cavity 160, the cavity 160 is at least partially filled with the fluid and the fluid may then flow from the cavity 160, below the seals 170, and into the second opening 140.
  • FIG. 6 is a cross-sectional view of the ball 150 taken along lines 6-6 in FIG. 4.
  • the fluid may flow under the seal 170 and into the cavity 160 by passing through the first fluid passage feature 210.
  • the fluid may flow in the cavity 160 around the ball 150 and may exit the cavity 160 as it flows under the seal 170 by passing through the second fluid passage feature 220.
  • the second fluid passage feature 220 may comprise a bore formed in the ball 150.
  • FIGS. 7A-7B show a ball 150 according to one embodiment in which the second fluid passage feature 220 comprises a bore formed in the ball.
  • the bore 290 may comprise a hole extending through a portion of the ball 150 such that when the ball 150 is rotated, a first entry 300 may communicate with the cavity 160 and a second entry 310 may communicate with the second opening 140 in the valve body 110.
  • the first fluid passage feature 210 may comprise a recessed portion 230 as described above.
  • the bore 290 may form a right angle in the central portion of the ball 150.
  • the first entry 300 may be positioned about a quarter-turn from the rotationally forward edge of the recessed portion 230 and the second entry 310 may be positioned about one-half turn from the recessed portion 230.
  • the first fluid passage feature 210 and the second fluid passage feature 220 may be switched from that illustrated in FIGS. 7A-7B.
  • the first fluid passage feature 210 may comprise a bore 290 configured so that as the ball 150 is rotated, the first entry 300 may communicate with the cavity 160 and the second entry 310 may communicate with the first opening 130.
  • the second fluid passage feature 220 may comprise a recessed portion 230 as described above.
  • FIG. 8 is a cross-sectioned view of a ball 150 similar to that shown in FIG.6 and having a bore 290 according to one embodiment.
  • a fluid may flow under the seal 170 and into the cavity 160 by passing through the first fluid passage feature 210.
  • the fluid may flow in the cavity 160 around the ball 150.
  • the fluid may exit the cavity 160 by flowing through the bore 290. More particularly, the fluid may flow into the first entry 300, through the bore 290 and out the second entry 310.
  • the fluid may flow into the second entry 310, through the bore 290, and into the cavity 160 through first entry 300.
  • the fluid may exit the cavity 160 by flowing under the seal 170 and into the second opening 140 of the valve body 110.
  • the ball valve 100 may comprise only a single seal 170 associated with the portion of the ball having the recessed portion 230, the opposing portion of the ball having no seal 170 associated therewith. Referring to FIG. 9, the first opening 130 of the fluid passageway 120 maybe filled with a process media or fluid flowing in the direction of arrows 280.
  • the fluid When the ball 150 is rotated so that a portion of the first fluid passage feature 210 is positioned in the first opening 130 and another portion is positioned in the cavity 160, the fluid may pass from the first opening 130, below the seal 170 and into the cavity 160. With no seal 170 between the ball 150 and the second opening 140, the fluid may pass from the cavity 160 to the second opening 140 without any seal impediment. As the fluid flows into the cavity 160, the cavity 160 is at least partially filled with the fluid and the fluid may then flow from the cavity 160 into the second opening 140.
  • first fluid passage feature 210 and the seal 170 may be modified from the embodiment illustrated in FlG. 9.
  • no seal 170 may be positioned between the ball 150 and the first opening 130 so that fluid may flow substantially uninhibited into the cavity 160.
  • the second fluid passage feature 220 may comprise a recessed portion 230, as described above, that may operate in conjunction with the seals 170 positioned between the ball and the second opening 140.
  • the ball 150 may either comprise a second fluid passage feature 220 (shown by broken lines) or no substantial second fluid passage feature 220.
  • the second fluid passage feature 220 may be formed by a ball 150 comprising only a semispherical body, as opposed to a fully spherical body.
  • the ball 150 may have a semispherical body comprising about 3/4 of a sphere, with the remaining portion of approximately 1/4 of a sphere being substantially open and comprising the second fluid passage feature 220.
  • the semispherical body of ball 150 may comprise about 2/3 of a sphere, with the remaining 1/3 comprising the second fluid passage feature 220.
  • FIG. 10 is a cross-sectional view of the ball 150 taken along lines 10-10 in FIG. 9 illustrating the optional second fluid passage feature 220.
  • the fluid may flow under the seal 170 and into the cavity 160 by passing through the first fluid passage feature 210.
  • the fluid may flow in the cavity 160 and may exit the cavity 160 as at least some of the fluid flows at least partially through the second fluid passage feature 220 into the second opening 140.
  • the embodiment of the ball 150 shown in FIG. 10 may be employed for use with two seals 170, as described herein above. In such embodiments, the fluid may flow from the cavity 160 by flowing through second fluid passage feature 220 and passing under the seal 170 to the second opening 140.
  • FIG. 11 is a system diagram of a fluid control system according to an embodiment of the present invention comprising a ball valve 100.
  • the ball valve 100 may comprise a ball valve 100 of the present invention as described herein above. More particularly, the ball valve may comprise a valve body and a ball rotatably secured within the valve body. The ball may be configured according to an embodiment as described above.
  • An actuator 320 may be controllably coupled to the actuation shaft 200 and configured to control the rotation of the ball 150.
  • Actuator 320 may comprise any conventional actuator known in the art.
  • the actuator 320 may comprise one of the Worcester Controls brand actuators manufactured by Flowserve Management Company of Irving, TX.
  • a positioner 330 maybe operably coupled to the actuator 320.
  • the positioner 330 may comprise any conventional positioner as is known in the art.
  • the positioner 330 may comprise one of the Worcester® Controls brand positioners manufactured by Flowserve Management Company of Irving, TX.
  • the valve member may comprise, for example, a plug positioned in a cavity of a valve and comprising at least a first fluid passage feature 210 configured to allow fluid to communicate between the first opening of a valve and the cavity.
  • the first fluid passage feature 210 may be positioned on an outer surface of the plug and may comprise a recess or recessed portion in the outer surface. Similar to the embodiments comprising a ball valve, the recess in the plug may be configured to allow fluid from the first opening to pass into the cavity between the plug and a wall of the valve body or a seat, depending on the embodiment.
  • the plug may further comprise a second fluid passage feature 220, and the first and second fluid passage features 210, 220 may be configured according to any of the configurations described herein above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

L'invention porte sur des vannes de commande de fluide, qui comprennent un corps de vanne et un élément de vanne fixé de manière rotative à l'intérieur du corps de vanne. L'élément de vanne peut comprendre une première partie de passage de fluide et une seconde partie de passage de fluide pour commander l'écoulement d'un fluide à partir d'une première ouverture dans le corps de vanne, dans une cavité et à partir de la cavité dans une seconde ouverture dans le corps de la vanne. L'invention porte également sur des systèmes de commande de fluide employant de telles vannes. L'invention porte également sur des procédés pour commander un volume d'écoulement à travers un système de conduit de fluide utilisant de telles vannes.
PCT/US2009/039822 2009-04-07 2009-04-07 Vanne de commande de fluide WO2010117361A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2009/039822 WO2010117361A1 (fr) 2009-04-07 2009-04-07 Vanne de commande de fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2009/039822 WO2010117361A1 (fr) 2009-04-07 2009-04-07 Vanne de commande de fluide

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Publication Number Publication Date
WO2010117361A1 true WO2010117361A1 (fr) 2010-10-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH708205A1 (de) * 2013-06-12 2014-12-15 Belimo Holding Ag Regelhahn.
DE102015120163A1 (de) * 2015-11-20 2017-05-24 Choren Industrietechnik GmbH Kugelhahn für die Drosselung eines Medienstromes
FR3082585A1 (fr) * 2018-06-14 2019-12-20 Alpes Instruments. Vanne de regulation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542878A (en) * 1983-08-10 1985-09-24 Jarecki Industries Ball valve
US5370154A (en) * 1992-09-18 1994-12-06 Robert L. Cargill, Jr. Rotary control valve with variable area orifice
US5573032A (en) * 1993-08-25 1996-11-12 Rosemount Inc. Valve positioner with pressure feedback, dynamic correction and diagnostics
US5671911A (en) * 1996-08-07 1997-09-30 Amcast Industrial Corporation By-pass ball valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542878A (en) * 1983-08-10 1985-09-24 Jarecki Industries Ball valve
US5370154A (en) * 1992-09-18 1994-12-06 Robert L. Cargill, Jr. Rotary control valve with variable area orifice
US5573032A (en) * 1993-08-25 1996-11-12 Rosemount Inc. Valve positioner with pressure feedback, dynamic correction and diagnostics
US5671911A (en) * 1996-08-07 1997-09-30 Amcast Industrial Corporation By-pass ball valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH708205A1 (de) * 2013-06-12 2014-12-15 Belimo Holding Ag Regelhahn.
WO2014198367A1 (fr) * 2013-06-12 2014-12-18 Belimo Holding Ag Robinet de régulation
US9903481B2 (en) 2013-06-12 2018-02-27 Belimo Holding Ag Control valve
DE102015120163A1 (de) * 2015-11-20 2017-05-24 Choren Industrietechnik GmbH Kugelhahn für die Drosselung eines Medienstromes
FR3082585A1 (fr) * 2018-06-14 2019-12-20 Alpes Instruments. Vanne de regulation

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