WO2018181532A1 - Soupape à bille - Google Patents

Soupape à bille Download PDF

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Publication number
WO2018181532A1
WO2018181532A1 PCT/JP2018/012887 JP2018012887W WO2018181532A1 WO 2018181532 A1 WO2018181532 A1 WO 2018181532A1 JP 2018012887 W JP2018012887 W JP 2018012887W WO 2018181532 A1 WO2018181532 A1 WO 2018181532A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball valve
valve body
flow passage
flow path
flow
Prior art date
Application number
PCT/JP2018/012887
Other languages
English (en)
Japanese (ja)
Inventor
洋繁 瀬戸
Original Assignee
旭有機材株式会社
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 旭有機材株式会社 filed Critical 旭有機材株式会社
Publication of WO2018181532A1 publication Critical patent/WO2018181532A1/fr

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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
    • 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

Definitions

  • the present invention relates to a ball valve used in fluid transport piping lines of various industries such as chemical plant, water and sewage, agriculture, fishery industry, semiconductor manufacturing field, food field and the like.
  • the ball valve can normally be opened and closed by rotation by approximately 90 degrees and has a simple structure and is excellent in economic efficiency. However, since the flow rate changes rapidly according to the degree of opening, two open and fully closed states are opened. Often used in degrees.
  • the degree of opening of the ball valve may be made a minute degree of opening, and the fluid may flow slightly, but setting of the degree of opening is difficult and unexpected external force on the handle There is a risk that the degree of opening may change if it takes time.
  • a ball valve capable of stably adjusting the flow rate to a minute flow rate
  • a ball valve described in Patent Document 2 there is a ball valve described in Patent Document 2.
  • a sub flow passage smaller in diameter than the main flow passage is formed at a position orthogonal to the main flow passage formed in the ball of the ball valve.
  • the thickness of the drill In order to form the sub flow passage, the thickness of the drill needs to be a thickness that does not break when cutting the sub flow passage, and a flow rate larger than the desired flow rate may flow.
  • the cost of the fluid is increased to prevent internal retention in order to prevent the fluid from staying in the piping or ball valve.
  • the object of the present invention is to solve the problems of the prior art as described above, and to provide a ball valve capable of reducing the flow rate when flowing fluid for the purpose of preventing generation of foreign matter and fluid retention inside the ball valve. It is to be.
  • a valve main body provided with a first flow passage, a second flow passage, and a valve chamber communicating the first flow passage and the second flow passage, and the first flow passage side in the valve chamber A seat positioned on the second flow path side of the valve chamber and configured to adjust the flow rate of the fluid flowing through the first flow path and the second flow path;
  • a ball valve body having a through hole serving as a valve body flow path, and a ball valve body communicating or blocking the first flow path and the second flow path.
  • the ball valve is provided.
  • the guiding surface of the flow rate adjustment sheet is continuously connected to the sealing surface and is separated from the ball valve body. Further, the gap between the guide surface and the ball valve body continuously increases as it approaches the flow path axis from the outer peripheral edge of the guide surface. According to this aspect, when the ball valve body rotates, the ball valve body and the flow rate adjusting portion can be brought into non-contact with each other, so that the ball valve body does not slide in contact with the flow rate adjusting portion. It is possible to reduce the generation of foreign matter due to wear and sliding.
  • the fluid flowing in the valve body flow path easily flows along the guiding surface from the outer peripheral edge of the guiding surface toward the center, stagnant parts are less likely to be generated in the gap between the guiding surface and the ball valve body. Effective flushing can be performed, and foreign matter can be prevented from being accumulated in the gap and bacteria can be prevented from being generated.
  • the sealing surface is a spherical surface having the same radius as the radius of the ball valve body
  • the guiding surface is a spherical surface having a smaller radius than the radius of the ball valve body.
  • the guiding surface is a spherical surface that bulges toward the second flow path, the fluid flowing in the valve body flow path can more easily flow along the outer peripheral edge of the guiding surface, and flushing the outer peripheral edge of the guiding surface more effectively it can.
  • the seat member has a communication groove communicating the first flow path and the valve chamber, and the ball valve body has a valve body flow path.
  • a ball valve having an auxiliary flow passage having an inner diameter smaller than that of the valve flow passage, the auxiliary flow passage communicating the valve flow passage with the second flow passage at least in a fully closed state; Be done.
  • the first flow passage, the valve chamber, the valve body flow passage, and the second flow passage communicate with each other, so that fluid can be allowed to flow little by little in the ball valve even in the fully closed state.
  • the fluid retention in the valve chamber and the valve body flow path can be suppressed, and the generation of bacteria, the accumulation of foreign matter, and the fixation can be reduced.
  • the auxiliary flow path communicates the large diameter flow path located on the outer peripheral side of the ball valve body, the large diameter flow path and the valve body flow path and is large
  • a ball valve is provided, which has a small diameter flow passage with an inner diameter smaller than the radial flow passage, and the length of the small diameter flow passage is shorter than the large diameter flow passage.
  • the auxiliary flow passage is formed stepwise by the large diameter flow passage and the small diameter flow passage shorter than the large diameter flow passage.
  • the drill used for drilling the small diameter flow path is less likely to break and the outer diameter of the drill can be reduced, so the inner diameter of the small diameter flow path can be reduced and the flow rate for preventing retention in the ball valve is reduced. it can.
  • a ball valve as defined in the fourth aspect wherein the inner diameter of the small diameter passage is 0.1 mm or more and less than 1 mm.
  • the small diameter flow path having an inner diameter of less than 1 mm can be stably drilled. Further, since the inner diameter of the small diameter flow passage is 0.1 mm or more, a fluid such as pure water can stably flow in the small diameter flow passage.
  • foreign matter is generated by reducing the contact area between the flow rate adjustment sheet and the ball valve body and increasing the gap between the flow rate adjustment sheet and the ball valve body as it approaches the flow path axis. It is possible to provide a ball valve capable of preventing fluid from staying in the gap. Furthermore, a communication groove is formed in the seat to connect the first flow path and the valve chamber, and the auxiliary flow path connecting the valve flow path and the second flow path to the ball valve body is a relatively large diameter hole By forming stepwise with small diameter holes, it is possible to provide a ball valve capable of preventing the fluid from staying in the ball valve at a low flow rate.
  • FIG. 1 is a cross-sectional view showing a fully open state of the ball valve according to the first embodiment
  • FIG. 2 is a drawing showing a flow rate adjustment sheet used for the ball valve according to the first embodiment
  • FIG. It is a principal part expanded AA sectional view showing each opening degree state of a ball valve concerning a first embodiment
  • Drawing 4 is a side view from the 2nd channel side of a ball valve concerning a first embodiment .
  • the ball valve is a first class of the valve body 1 so as to always abut on the valve body 1, the ball valve body 2 disposed inside the valve body 1, and the ball valve body 2.
  • the flow rate of the fluid flowing through the first flow passage 11 and the second flow passage 12 is determined by the seat 3 located on the passage 11 side and the second flow passage 12 side of the valve main body 1 so as to always contact the ball valve body 2.
  • a flow control sheet 4 configured to adjust.
  • the ball valve body 2 is connected to a handle 6 which is an operation unit via a stem 5.
  • the ball valve body 2 is rotated following the rotation of the handle 6 to connect or block the first flow path 11 and the second flow path 12 of the valve body 1.
  • the valve body 1 is made of polyvinyl chloride (hereinafter referred to as PVC) and has a bore of 25 mm.
  • the valve main body 1 has a substantially hollow cylindrical shape, and has a first flow passage 11, a second flow passage 12 having the same flow passage axis as the first flow passage 11, and a first flow passage 11 and a second flow passage 12 inside. And a valve chamber 13 communicating with each other.
  • An annular recess 14 centered on the flow channel axis is formed on the wall surface of the valve chamber 13 on the second flow passage 12 side, and the flow rate adjustment sheet 4 is inserted into the recess 14.
  • an annular groove 10 is formed on the bottom of the recess 14, and the first cushion 16 is inserted into the annular groove 10.
  • a cutout groove 15 is formed on the outer peripheral edge of the recess 14 so as to protrude radially outward of the recess 14.
  • a through hole into which the stem 5 is inserted is formed in communication with the valve chamber 13 in a direction intersecting the flow passage axis of the valve body 1.
  • a male screw is formed on the outer peripheral surface of each end of the valve body 1, and a female screw is formed on the inner peripheral surface of the end on the first flow passage 11 side.
  • the ball valve body 2 is made of PVC and has a spherical shape.
  • an engagement groove having a trapezoidal cross section in which the stem 5 is engaged is formed in the upper surface of the ball valve body 2.
  • a through hole having a circular cross-section to be the valve body channel 21 is formed in the inside of the ball valve body 2.
  • the stem 5 is made of PVC and has a substantially cylindrical shape.
  • the upper end portion of the stem 5 is formed with an engagement portion to be engaged with the engagement groove of the handle 6, and the lower end portion of the stem 5 is trapezoidal in cross section to be engaged with the engagement groove of the ball valve body 2
  • an annular groove in which the O-ring is fitted is formed.
  • the handle 6 is made of acrylonitrile butadiene styrene copolymer synthetic resin (hereinafter referred to as ABS), and an engagement groove engaged with the engagement portion of the stem 5 is formed at the center of the lower surface.
  • the valve body retainer 9 is made of PVC and has a cylindrical shape.
  • the seat 3 and the second cushion 17 are fitted to the end surface of the valve body retainer 9 on the ball valve body 2 side, and the O ring is disposed on the other end surface of the valve body retainer 9.
  • an O-ring is disposed on the outer peripheral surface of one end of the valve holder 9, and on the outer peripheral surface of the other end of the valve holder 9, there is an external thread that is screwed with the female screw of the valve body. It is formed.
  • the sheet 3 is made of polytetrafluoroethylene (hereinafter referred to as PTFE) and has an annular disc shape.
  • the seat 3 is disposed in the valve chamber 13, and the center of the seat 3 is located on the flow path axis.
  • the seat 3 is provided with a sealing surface 31 on which the ball valve body 2 slides and seals the fluid, and the sealing surface 31 is formed by an inclined surface which is a conical surface.
  • the flow rate adjustment sheet 4 is made of PTFE and has an annular disc shape.
  • the flow control sheet 4 is disposed in the valve chamber 13, and the center of the flow control sheet 4 is located on the flow path axis.
  • the flow rate adjustment sheet 4 has an annular seat portion 42 fitted in an annular recess 14 disposed in the valve chamber 13 and a flow rate adjustment portion 44 located on the inner peripheral side of the seat portion 42. .
  • a protrusion 41 is formed which is inserted into the notch groove 15 formed in the recess 14 of the valve chamber 13. The projection 41 prevents the flow control sheet 4 from rotating when the flow control sheet 4 is inserted into the valve body 1.
  • the seat portion 42 like the seat 3, comprises a sealing surface 43 on which the ball valve body 2 slides and seals the fluid.
  • the sealing surface 43 is formed to be a spherical surface having a radius substantially the same as the radius R1 of the ball valve body 2.
  • the contact between the ball valve body 2 and the seal surface 43 is a surface contact.
  • the ball valve according to the present embodiment is a ball valve having a flow rate adjusting function, and is often used in a half-opened state. Therefore, when the ball valve is in a half-opened state, the ball valve body 2 is pressed against the sealing surface 43 to seal It is possible to reduce the damage of the surface 43 and the biting of the ball valve body 2.
  • the sheet 3 can be inserted into the recess 14 like the flow rate adjusting sheet 4, so that a standard without flow adjusting function is provided. At the time of specification, it is preferable to insert the sheet 3 into the recess 14 instead of the flow rate adjusting sheet 4.
  • a cylindrical projecting portion 45 slightly smaller in diameter than the second flow passage 12 is formed on the second flow passage 12 side of the flow rate adjustment unit 44. Since the projecting portion 45 is inserted into the second flow path 12, the thickness of the flow rate adjusting portion 44 can be increased while suppressing the change in the total length of the ball valve, and the strength of the flow rate adjusting sheet 4 can be secured. Further, the flow rate adjusting portion 44 is formed with a flow rate adjusting opening 46 which communicates with the second flow passage 12 and the valve chamber 13 and adjusts the flow rate of the ball valve.
  • the flow rate adjustment opening 46 is generally fan-shaped, and extends from one of the axes orthogonal to the central axis of rotation of the ball valve body 2 to the other. That is, the area of the opening S (see FIG.
  • the flow rate adjustment opening 46 formed by the flow rate adjustment opening 46 and the through hole of the ball valve 2 increases as the ball valve changes from the fully closed state to the fully open state.
  • processing is easier as compared to the case where the flow rate adjustment opening 46 is formed in the ball valve body 2, and bulk of parts inventory is increased. It can be reduced.
  • the flow rate adjustment sheet 4 is formed of PTFE, it can be applied to many usage conditions with one kind of material, so the number of parts stock can be reduced.
  • the flow rate adjusting unit 44 is formed with a guiding surface 47 which is continuously connected to the sealing surface 43 and guides the fluid to the second flow passage 12.
  • the guiding surface 47 is formed into a spherical surface having a radius R2 smaller than the radius R1 of the ball valve 2 and is separated from the ball 2.
  • the radius R2 of the guiding surface 47 is made easy to understand by an imaginary line.
  • the guiding surface 47 is formed to approach the surface of the flow rate adjustment sheet 4 on the second flow passage 12 side as it approaches the flow passage axis. That is, the gap 25 between the guide surface 47 and the ball valve body 2 becomes larger as it approaches the flow path axis.
  • the cap nut 7 is made of PVC and has a substantially cylindrical shape. On the inner peripheral surface of one end of the cap nut 7, a female screw portion screwed to the male screw formed at both ends of the valve main body 1 is formed, and the other end of the cap nut 7 is formed An inner flange portion protruding to the inner diameter side is formed.
  • the flanged short pipe 8 is made of PVC, and has an outer diameter portion projecting to the outer diameter side at one end. The flanged short pipe 8 is clamped and fixed to both end surfaces of the valve body 1 by a cap nut 7.
  • the guiding surface 47 of the flow rate adjustment sheet 4 is formed to be a spherical surface having a radius R2 smaller than the radius R1 of the ball valve body 2 and is separated from the ball valve body 2. Therefore, even if the ball valve body 2 rotates, the ball valve body 2 and the flow rate adjusting unit 44 do not come in contact with each other, and the foreign matter is generated due to wear or sliding of the flow rate adjusting sheet 4 accompanying the rotation of the ball valve body 2 Can be reduced. Further, since the ball valve body 2 and the flow rate adjusting unit 44 are separated, even if the flow rate adjusting unit 44 is provided, the operating torque can be equivalent to that of a general ball valve without the flow rate adjusting unit 44.
  • the guiding surface 47 is formed such that the clearance 25 between the guiding surface 47 and the ball valve body 2 becomes larger as it approaches the flow path axis. Furthermore, the guiding surface 47 is continuously connected to the sealing surface 43. Therefore, the fluid flowing in the valve flow passage 21 easily flows along the guiding surface 47 from the outer peripheral edge of the guiding surface 47 toward the center, so that the stagnation portion is formed in the gap 25 (particularly, in the vicinity of the outer peripheral edge of the guiding surface 47). It becomes difficult to occur. In the ball valve, foreign matter is likely to be deposited in the gap 25 in the fully closed state or in the gap 25 far from the valve flow path 21 in the half open state, or fluid tends to be accumulated to generate bacteria. By setting the state, the entire gap 25 can be flushed and effectively cleaned.
  • the flow rate adjustment opening 46 is formed in a generally fan shape, but the shape of the flow rate adjustment opening 46 can be appropriately selected depending on what flow rate adjustment is performed, and other shapes such as rectangles or sparks Shape, right-angled trapezoid etc. are raised. Further, the opening for forming the flow adjustment opening 46 is not limited to one, and the flow adjustment opening 46 may be formed by a plurality of holes.
  • the seal surface 31 of the seat 3 is formed as an inclined surface which becomes a conical surface, but like the seal surface 43 of the flow rate adjustment sheet 4, the seal surface 31 is substantially the same as the radius R1 of the ball valve body 2. It may be formed to be a spherical surface having a radius. Further, although the seal surface 43 of the flow rate adjustment sheet 4 is formed to be a spherical surface having a radius substantially the same as the radius R1 of the ball valve body 2, it is a conical surface like the seal surface 31 of the sheet 3. You may form by an inclined surface.
  • the guiding surface 47 is formed to be a spherical surface having a radius R2 smaller than the radius R1 of the ball valve body 2, but the gap 25 between the guiding surface 47 and the ball valve body 2 It should be larger as it gets closer to the axis.
  • Other shapes include a combination of a conical surface, a pyramidal surface, an ellipsoidal surface, and a plurality of curved surfaces and tapered surfaces, but when the outer peripheral edge of the guiding surface 47 is formed by a curved surface that bulges in the second channel 12 direction It is suitable. By doing this, the fluid flowing through the valve body channel 21 can more easily flow along the outer peripheral edge of the guide surface 47, and the outer peripheral edge of the guide surface 47 can be flushed more effectively.
  • FIG. 5 is an enlarged sectional view of an essential part showing a fully closed state of the ball valve according to the second embodiment
  • FIG. 6 is a sectional view of the ball valve used in the ball valve according to the second embodiment. It is sectional drawing which shows the method to perforate.
  • the second embodiment is different from the first embodiment mainly in that an auxiliary flow passage 22 is formed to prevent fluid from staying in the ball valve.
  • 5 to 6 the components having the same operations and functions as those of the first embodiment are denoted by the same reference numerals as those in FIGS. 1 to 4. In the following, the differences from the first embodiment are mainly described. explain.
  • a communication groove 32 is formed which constantly communicates the first flow passage 11 and the valve chamber 13. Further, in the circumferential direction of rotation of the ball valve body 2, a communication hole to be the auxiliary flow path 22 orthogonal to the valve body flow path 21 is formed.
  • the auxiliary flow passage 22 has a large diameter flow passage 23 with an inner diameter of 4 mm, and a small diameter flow passage 24 with an inner diameter of 0.3 mm and shorter than the large diameter flow passage 23.
  • a bottomed hole to be the large diameter flow passage 23 is formed by a drill having an outer diameter of 4 mm from the outer peripheral surface of the ball valve body 2 toward the valve flow passage 21. . It is preferable to form the bottom of the large diameter flow passage 23 so as to be recessed toward the valve body flow passage 21 because positioning of the drill forming the small diameter flow passage 24 is facilitated.
  • a through hole to be the small diameter flow passage 24 is formed by a drill having an outer diameter of 0.3 mm from the center of the bottom surface of the large diameter flow passage 23 toward the valve body flow passage 21.
  • the processing method in which the auxiliary flow passage 22 is formed stepwise by the large diameter flow passage 23 and the small diameter flow passage 24 is such that the drill used for drilling the small diameter flow passage 24 is easily broken.
  • the inner diameter of the small diameter flow passage 24 is less than 1 mm. Is preferred.
  • the auxiliary flow passage 22 includes the large diameter flow passage 23 and the small diameter flow passage 24 If the length of the small diameter flow path 24 is shortened by dividing and forming the through hole, the through hole becomes easy to process. In particular, when the inner diameter of the small diameter flow passage 24 is less than 1 mm, the drill is easily broken.
  • the inner diameter of the small diameter flow passage 24 may be 0.1 mm or more in order to stably pass a fluid such as pure water through the small diameter flow passage 24.
  • the auxiliary flow passage 22 is formed stepwise by the large diameter flow passage 23 and the small diameter flow passage 24, the inner diameter of the small diameter flow passage 24 can be reduced, and the flow rate for the purpose of retention prevention can be suppressed.
  • the other actions and effects of the ball valve of the first embodiment are the same as those of the ball valve of the first embodiment, and thus the description thereof is omitted.
  • the auxiliary flow passage 22 is formed by a drill, but may be formed in advance when the ball valve body 2 is formed by injection molding. Also in this case, since the auxiliary flow passage 22 includes the large diameter flow passage 23 and the small diameter flow passage 24, the small diameter flow passage 24 is thinner than when the auxiliary flow passage 22 is configured with only the small diameter flow passage 24. It will be easier. Further, only the large diameter flow passage 23 of the auxiliary flow passage 22 may be formed by injection molding. Further, in the second embodiment, the numbers of the communication grooves 32 and the auxiliary flow channels 22 are one at a time, but the numbers of the communication grooves 32 and the auxiliary flow channels 22 are freely designed according to the desired flow rate. it can.
  • the material of the valve body 1, stem 5, ball valve body 2, valve body press 9, seat 3, flow rate adjustment seat 4, handle 6, cap nut 7 and flanged short pipe 8 has strength as a valve or
  • the material which fulfills functions such as chemical resistance to fluid can be selected appropriately.
  • resins such as PVC, polypropylene, polyethylene, polyvinylidene fluoride, ABS, PTFE, stainless steel, iron, copper alloys, metals such as aluminum, or ceramics such as porcelain can be mentioned as suitable materials.
  • valve body 2 ball valve body 3 seat 4 flow rate adjustment seat 5 stem 6 handle 7 cap nut 8 short pipe with flange 9 valve body presser 10 annular groove 11 first flow passage 12 second flow passage 13 valve chamber 14 recess 15 cutout groove 16 First cushion 17 Second cushion 21 Valve body flow path 22 Auxiliary flow path 23 Large diameter flow path 24 Small diameter flow path 25 Clearance 31 Seal surface 32 Communication groove 41 Protrusion 42 Seat section 43 Seal surface 44 Flow adjustment section 45 Projection 46 Flow rate Adjustment opening 47 Guide surface

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

Abstract

L'invention concerne une soupape à bille configurée pour empêcher des substances étrangères de se produire à l'intérieur de la soupape à bille et également pour empêcher un fluide de stagner à l'intérieur de la soupape à bille. Cette soupape à bille est pourvue d'un siège de régulation de débit (4) situé à l'intérieur d'une chambre de soupape (13) à une position proche d'un second passage d'écoulement (12) et configuré pour ajuster le débit de fluide s'écoulant à travers un premier passage d'écoulement (11) et le second passage d'écoulement (12). Le siège de régulation de débit (14) est pourvu d'une section de siège annulaire (42) et d'une section de régulation de débit (44) qui est située sur le côté périphérique interne de la section de siège (42). La section de siège (42) est pourvue d'une surface d'étanchéité (43) sur laquelle coulisse un corps de soupape à bille (2) et qui scelle le fluide. La section de régulation de débit (44) comprend: une ouverture de régulation de débit (46) destinée à fournir une communication entre le second passage d'écoulement (12) et la chambre de soupape (13); et une surface de guidage (47) reliée de façon continue à la surface d'étanchéité (43) et configurée pour se séparer du corps de soupape à bille (2) et pour guider un fluide. L'espace entre la surface de guidage (47) et le corps de soupape à bille (2) augmente en continu à partir du bord périphérique externe de la surface de guidage (47) vers un axe de passage d'écoulement.
PCT/JP2018/012887 2017-03-28 2018-03-28 Soupape à bille WO2018181532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-063159 2017-03-28
JP2017063159A JP6914072B2 (ja) 2017-03-28 2017-03-28 ボールバルブ

Publications (1)

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WO2018181532A1 true WO2018181532A1 (fr) 2018-10-04

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PCT/JP2018/012887 WO2018181532A1 (fr) 2017-03-28 2018-03-28 Soupape à bille

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102102143B1 (ko) * 2018-11-27 2020-04-21 우명배 유량 조절 밸브
CN109578610B (zh) * 2019-01-31 2023-09-19 天津卡尔斯阀门股份有限公司 供热传输管网球阀
KR102242542B1 (ko) * 2020-05-06 2021-04-20 티에스모스트 주식회사 볼 밸브

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS483161Y1 (fr) * 1970-12-18 1973-01-26
JPS63129776U (fr) * 1987-02-17 1988-08-24
US20130313457A1 (en) * 2012-05-23 2013-11-28 Cameron International Corporation Valve with adaptive facial sealing ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS483161Y1 (fr) * 1970-12-18 1973-01-26
JPS63129776U (fr) * 1987-02-17 1988-08-24
US20130313457A1 (en) * 2012-05-23 2013-11-28 Cameron International Corporation Valve with adaptive facial sealing ring

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JP2018165540A (ja) 2018-10-25

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