CN104989841A - High-temperature metal hard sealing floating ball valve - Google Patents
High-temperature metal hard sealing floating ball valve Download PDFInfo
- Publication number
- CN104989841A CN104989841A CN201510434645.0A CN201510434645A CN104989841A CN 104989841 A CN104989841 A CN 104989841A CN 201510434645 A CN201510434645 A CN 201510434645A CN 104989841 A CN104989841 A CN 104989841A
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- Prior art keywords
- valve
- valve body
- floating ball
- valve seat
- metal hard
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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
- 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
- F16K5/0663—Packings
-
- 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
- F16K5/08—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a high-temperature metal hard sealing floating ball valve. The high-temperature metal hard sealing floating ball valve comprises a valve body, a valve seat, a ball, a stuffing box and a valve rod. The stuffing box is fixed to the valve body. One end of the valve rod penetrates through the stuffing box to be connected with the ball, and the other end of the valve rod is arranged outside the stuffing box. A valve cavity is formed between the valve body and the stuffing box, and the ball is arranged in the valve cavity. The valve seat is arranged between the valve body and the ball and connected to the valve body. The valve body comprises a first valve body and a second valve body. The valve seat comprises a first valve seat and a second valve seat. A valve cavity pressure release groove is formed in the first valve seat, and a high-temperature expansion elastic deformation groove is formed in the second valve seat. Valve cavity pressure release holes are formed in the ball. Through the cooperation of the valve cavity pressure release holes and the valve cavity pressure release groove, the problem that the pressure of a valve cavity of a metal hard sealing floating ball valve is increased abnormally in a high-temperature state is effectively solved.
Description
Technical field
The present invention relates to fluid technique, relate more specifically to a kind of high-temperature metal hard seal floating ball valve.
Background technique
Along with the development of chemical industry, particularly under harsh operating mode (high temperature, high pressure, highly corrosive etc.), also more and more higher to the requirement of the high-temperature metal hard-sealed ball valve applied under high temperature (> 450 DEG C) operating mode.
Mostly there is following a few point defect in the high-temperature metal hard seal floating ball valve that domestic market uses:
1, valve pocket releasing pressure automatically structure is not set or valve pocket releasing pressure automatically vibrational power flow is unreasonable, when being accumulated in the medium in valve pocket and being subject to affecting of pipe temperature rising, medium volume in valve pocket will swash acute expansion, cause the instantaneous rising of valve pocket pressure and cause valve body deformation, valve body is even caused to explode, cause damage of facilities, even jeopardize personal safety.
2, be all adopt split type downstream seal valve seat, under high temperature (> 450 DEG C) operating mode, the expansion coefficient of the expansion coefficient of right valve barrel, valve seat and downstream valve seat insert is different, causes this structure valve in running, often occur locking or interior leakage phenomenon;
3, between left valve barrel and right valve barrel, seal between left valve barrel and lengthening stuffing box and adopt spiral wound gasket to seal, after using a period of time under worst hot case, because expansion, the deterioration phenomenon of spirotallic gasket sealed material Expanded graphite are serious, high temperature media leaks outside to cause valve to occur, and causes safety problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of when ensureing spheroid that at high temperature deformation coefficient is different and the second valve seat generation resiliently deformable, still can realize the high-temperature metal hard seal floating ball valve that the effective sealing between spheroid and the second valve seat coordinates.
Another object of the present invention is to provide the high-temperature metal hard seal floating ball valve of the abnormal boosting problem of metal hard seal floating ball valve valve pocket under a kind of effective solution superhigh temperature state.
The invention provides a kind of high-temperature metal hard seal floating ball valve, it is characterized in that, comprise valve body, valve seat, spheroid, Stuffing box and valve rod, described Stuffing box is fixed on described valve body, one end of described valve rod is through described Stuffing box, be connected with described spheroid, the other end is arranged at the outside of described Stuffing box; Form valve pocket between described valve body, Stuffing box, described spheroid is arranged in described valve pocket, and described valve seat is arranged between described valve body and spheroid, and is connected on described valve body; Described valve body comprises the first valve body and the second valve body that are oppositely arranged, described valve seat comprises the first valve seat and the second valve seat, described first valve seat and the second valve seat are oppositely arranged on the both sides of described spheroid, between described first valve seat and the first valve body, be provided with the second disc spring; The periphery of described first valve seat is provided with valve pocket gas pressure relief slot, and described valve pocket is communicated with upstream line by described valve pocket gas pressure relief slot, described second valve seat is provided with high-temperature expansion resiliently deformable groove, described spheroid is provided with valve pocket relief hole.Preferably, between described first valve body and the junction plane of the second valve body, the first metal o-ring is provided with.
Preferably, described first valve seat is set on described first valve body, is flexibly connected between the two by Spielpassung.
Preferably, described second valve seat is fixed on described second valve body.
Preferably, described second valve seat is welded on described second valve body, or directly both is made overall structure.
Preferably, described valve body is provided with first flow, described spheroid is provided with the second runner matched with described first flow.
Preferably, the side sphere of described spheroid is provided with the first valve pocket relief hole, the valve rod chute on described spheroid top is provided with the second valve pocket relief hole, when the valve is open, first flow described in described second flow passage, described first valve pocket relief hole is towards valve pocket, and described valve pocket relief hole is communicated with described valve pocket and upstream and downstream pipeline; When the valve is closed, described first valve pocket relief hole is towards updrift side, and described first relief hole is communicated with described valve pocket and upstream line.
Preferably, described Stuffing box comprises filler casing and Gland, is fixedly connected with between the two by the 3rd threaded connector; One end of described filler casing is fixed on described valve body by the second threaded connector, and described gland covers on the other end of described filler casing, and is fixed on described filler casing by the 3rd threaded connector; Filler, successively through described filler casing and Gland, described filler casing, is filled between Gland and valve rod in one end of described valve rod; Described filler have employed the structural type of high temperature Packing seat and the sealing of high temperature V-type filler combination.
Preferably, the 3rd disc spring is set between one end and filler casing of described second threaded connector, between one end and the upper-end surface of Gland of described 3rd threaded connector, is provided with the 4th disc spring.
Preferably, the periphery of described Stuffing box is provided with radiating fin; Sliding bearing and thrust bearing is provided with between described valve rod and valve body.
High-temperature metal hard seal floating ball valve provided by the invention, due to described second valve seat being provided with high-temperature expansion resiliently deformable groove, when ensure that the spheroid and the second valve seat generation resiliently deformable that at high temperature deformation coefficient is different, the effective sealing that still can realize between spheroid and the second valve seat coordinates; Described valve pocket relief hole coordinates with described valve pocket gas pressure relief slot, plays dual safety guarantee, efficiently solves the abnormal boosting problem of metal hard seal floating ball valve valve pocket under the condition of high temperature.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the embodiment of the present invention, above-mentioned and other objects of the present invention, feature and advantage will be more clear, in the accompanying drawings:
Fig. 1 is the overall structure schematic diagram of high-temperature metal hard seal floating ball valve in the application;
Fig. 2 is the structural representation of the first valve seat in the application;
Fig. 3 is the structural representation of spheroid in the application.
Embodiment
Hereinafter with reference to accompanying drawing, various embodiment of the present invention is described in more detail.In various figures, identical element adopts same or similar reference character to represent.For the sake of clarity, the various piece in accompanying drawing is not drawn in proportion.
As shown in Figure 1, high-temperature metal hard seal floating ball valve in the present invention comprises valve body 1, valve seat 2, spheroid 3, Stuffing box 4 and valve rod 5, described Stuffing box 4 is fixed on described valve body 1, one end of described valve rod 5 is through described Stuffing box 4, be connected with described spheroid 1, the other end is arranged at the outside of described Stuffing box 4; Form valve pocket 100 between described valve body 1, Stuffing box 4, described spheroid 3 is arranged in described valve pocket 100, and described valve seat 2 is arranged between described valve body 1 and spheroid 3, and is connected on described valve body 1.
In addition, the valve in the present embodiment is metal hard-sealing ball valve, and described valve seat 2 adopts metal to make, and is firmly being tightly connected of metal to metal between described spheroid 3 and valve seat 2.
Described valve body 1 comprises the first valve body 11 and the second valve body 12, and described first valve body 11 and the second valve body 12 are oppositely arranged, and by the first threaded connector, such as stud, bolt or screw etc. are fixedly connected with.Preferably, between described first valve body 11 and the junction plane of the second valve body 12, be provided with the first metal o-ring 71, the junction plane between two valve bodies is sealed.First disc spring 61 is set between one end and valve body 1 of described first threaded connector, the high-temperature expansion distortion of valve in the present embodiment is compensated.Described valve body 1 is provided with first flow 10, passing through for fluid.
As Figure 1-3, described valve seat 2 comprises the first valve seat 21 and the second valve seat 22, and described first valve seat 21 and the second valve seat 22 are oppositely arranged on the both sides of described spheroid 3.Described first valve seat 21 is set on described first valve body 11, is flexibly connected between the two by Spielpassung.The second disc spring 62 is provided with between described first valve seat 21 and the first valve body 11, when there is high-temperature expansion distortion in described valve body 1 and spheroid 2 and valve seat itself, described second disc spring 62 adjusts the matching relationship of described valve seat 2 and described spheroid 3 automatically, especially by the matching relationship of described first valve seat 21 automatically between the described spheroid 3 of adjustment and the second valve seat 22, for the valve in the application provides high-temperature expansion deformation-compensated, make the relation that is sealed and matched between described spheroid 3 and valve seat at one's best all the time.The periphery of described first valve seat 21 is provided with valve pocket gas pressure relief slot 211, and described valve pocket 100 is communicated with upstream line by described valve pocket gas pressure relief slot 211, earth pressure release when raising suddenly for valve pocket internal pressure.Described second valve seat 22 is fixed on described second valve body 12, such as, be welded on described second valve body 12 by described second valve seat 22, or directly make overall structure, makes described second valve seat 22 can bear higher external pressure.Described second valve seat 22 is provided with high-temperature expansion resiliently deformable groove 221, and when ensureing that resiliently deformable occurs for spheroid 3 that at high temperature deformation coefficient is different and the second valve seat 22, the effective sealing that still can realize between spheroid 3 and the second valve seat 22 coordinates.
Described spheroid 3 is provided with the second runner 20 matched with described first flow 10, by the rotation of described spheroid 3, drives described second runner 20 to realize cutting off with the connected sum of described first flow 10.The side sphere of described spheroid 3 is provided with the first valve pocket relief hole 31, the valve rod chute on described spheroid top is provided with the second valve pocket relief hole 32; When the valve is open, described second runner 20 is communicated with described first flow 10, and described first valve pocket relief hole 31 is towards valve pocket 100, and described valve pocket relief hole 31,32 is communicated with described valve pocket 100 and upstream and downstream pipeline; When the valve is closed, described spheroid 3 is valve open state 90-degree rotation relatively, make described first valve pocket relief hole 31 towards updrift side, described first relief hole 31 is communicated with described valve pocket 100 and upstream line, now described second disc spring 62 promotes described spheroid 3 by described first valve seat 21, make the sphere of described spheroid 3 and described second valve seat 22 realize tight sealing engagement, so just achieve the cut-out between fluid medium upstream and downstream.
The setting of described valve pocket relief hole 31,32, ensures that no matter high-temperature metal hard seal floating ball valve is in unlatching or closed condition, and the exception boosting of valve pocket by valve pocket relief hole releasing pressure automatically in upstream line, can ensure the safety of valve and device.Described valve pocket relief hole 31,32 coordinates with described valve pocket gas pressure relief slot 211, plays dual safety guarantee, efficiently solves the abnormal boosting problem of metal hard seal floating ball valve valve pocket under the condition of high temperature.
Described Stuffing box 4 comprises filler casing 41 and Gland 42, and between the two by the 3rd threaded connector, such as stud, bolt or screw etc. are fixed together.One end of described filler casing 41 is fixed on described valve body 1 by the second threaded connector, and described gland 42 covers on the other end of described filler casing 41, and is threaded connection part and is fixed on described filler casing 41.Filler 8, successively through described filler casing 41 and Gland 42, described filler casing 1, is filled between Gland 2 and valve rod 5 in one end of described valve rod 5, seals described valve rod 5.Described filler 8 have employed high temperature Packing seat and high temperature V-type filler combination sealing structural type, ensure that High temperature valve be in hyperthermal environments for a long time under efficient sealed performance.
Preferably, the second metal o-ring 72 is set between described valve body 1 and filler casing 41, sealing surface is between the two sealed.3rd disc spring 63 is set between one end and filler casing 41 of described second threaded connector, for automatically adjusting to being sealed and matched between described valve body 1 and filler casing 41.The 4th disc spring 64 is provided with between one end and the upper-end surface of Gland 42 of described 3rd threaded connector, compensate high temperature V-type filler resiliently deformable in use by pretension compressible filler gland 42, keep the sealing effect of valve rod 5 long time stability.
The first described threaded connector, the second threaded connector and the 3rd threaded connector are the connection fastening piece between parts, such as stud, bolt or screw etc.
The periphery of described Stuffing box 4 is provided with radiating fin 411, described radiating fin 411, during the valve that high temperature fluid medium is flowed through in the application, strengthens flowing medium and extraneous heat exchange, valve quick heat radiating is lowered the temperature.
Between described valve rod 5 and valve body 1, be provided with sliding bearing 91 and thrust bearing 92, make the valve in the application when its each parts generation high-temperature expansion distortion, described valve rod 5 is not stuck, and can realize ease rotation.
Should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (10)
1. a high-temperature metal hard seal floating ball valve, it is characterized in that, comprise valve body (1), valve seat (2), spheroid (3), Stuffing box (4) and valve rod (5), described Stuffing box (4) is fixed on described valve body (1), one end of described valve rod (5) is through described Stuffing box (4), be connected with described spheroid (1), the other end is arranged at the outside of described Stuffing box (4); Valve pocket (100) is formed between described valve body (1), Stuffing box (4), described spheroid (3) is arranged in described valve pocket (100), described valve seat (2) is arranged between described valve body (1) and spheroid (3), and is connected on described valve body (1);
Described valve body (1) comprises the first valve body (11) and the second valve body (12) that are oppositely arranged, described valve seat (2) comprises the first valve seat (21) and the second valve seat (22), described first valve seat (21) and the second valve seat (22) are oppositely arranged on the both sides of described spheroid (3), between described first valve seat (21) and the first valve body (11), be provided with the second disc spring (62);
The periphery of described first valve seat (21) is provided with valve pocket gas pressure relief slot (211), described valve pocket (100) is communicated with upstream line by described valve pocket gas pressure relief slot (211), described second valve seat (22) is provided with high-temperature expansion resiliently deformable groove (221), and (3) are provided with valve pocket relief hole to described spheroid.
2. high-temperature metal hard seal floating ball valve according to claim 1, is characterized in that, between described first valve body (11) and the junction plane of the second valve body (12), be provided with the first metal o-ring (71).
3. high-temperature metal hard seal floating ball valve according to claim 1, is characterized in that, described first valve seat (21) is set on described first valve body (11), is flexibly connected between the two by Spielpassung.
4. high-temperature metal hard seal floating ball valve according to claim 1, is characterized in that, described second valve seat (22) is fixed on described second valve body (12).
5. high-temperature metal hard seal floating ball valve according to claim 4, is characterized in that, described second valve seat (22) is welded on described second valve body (12), or directly both is made overall structure.
6. high-temperature metal hard seal floating ball valve according to claim 1, it is characterized in that, described valve body (1) is provided with first flow (10), described spheroid (3) is provided with the second runner (20) matched with described first flow (10).
7. high-temperature metal hard seal floating ball valve according to claim 1, it is characterized in that, the side sphere of described spheroid (3) is provided with the first valve pocket relief hole (31), the valve rod chute on described spheroid top is provided with the second valve pocket relief hole (32), when the valve is open, described second runner (20) is communicated with described first flow (10), described first valve pocket relief hole (31) is towards valve pocket (100), and described valve pocket relief hole (31,32) is communicated with described valve pocket (100) and upstream and downstream pipeline; When the valve is closed, described first valve pocket relief hole (31) is towards updrift side, and described first relief hole (31) is communicated with described valve pocket (100) and upstream line.
8. high-temperature metal hard seal floating ball valve according to claim 1, it is characterized in that, described Stuffing box (4) comprises filler casing (41) and Gland (42), is fixedly connected with between the two by the 3rd threaded connector;
One end of described filler casing (41) is fixed on described valve body (1) by the second threaded connector, described gland (42) covers on the other end of described filler casing (41), and is fixed on described filler casing (41) by the 3rd threaded connector; Filler (8), successively through described filler casing (41) and Gland (42), described filler casing (1), is filled between Gland (2) and valve rod (5) in one end of described valve rod (5); Described filler (8) have employed the structural type of high temperature Packing seat and the sealing of high temperature V-type filler combination.
9. high-temperature metal hard seal floating ball valve according to claim 8, it is characterized in that, 3rd disc spring (63) is set between one end of described second threaded connector and filler casing (41), between one end and the upper-end surface of Gland (42) of described 3rd threaded connector, is provided with the 4th disc spring (64).
10. high-temperature metal hard seal floating ball valve according to claim 8, is characterized in that, the periphery of described Stuffing box (4) is provided with radiating fin (411);
Sliding bearing (91) and thrust bearing (92) is provided with between described valve rod (5) and valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510434645.0A CN104989841A (en) | 2015-07-22 | 2015-07-22 | High-temperature metal hard sealing floating ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510434645.0A CN104989841A (en) | 2015-07-22 | 2015-07-22 | High-temperature metal hard sealing floating ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104989841A true CN104989841A (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510434645.0A Pending CN104989841A (en) | 2015-07-22 | 2015-07-22 | High-temperature metal hard sealing floating ball valve |
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| Country | Link |
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| CN (1) | CN104989841A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285231A (en) * | 2019-07-23 | 2019-09-27 | 欧维克集团有限公司 | A kind of new energy industry high temperature and pressure hard seal ball valve |
| CN110701335A (en) * | 2019-10-30 | 2020-01-17 | 昆山维萨阀门股份有限公司 | Large-caliber one-way high-temperature hard-seal floating ball valve |
| CN113847446A (en) * | 2021-10-09 | 2021-12-28 | 欧维克集团有限公司 | Ball valve with ceramic lining |
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| US6065736A (en) * | 1996-10-15 | 2000-05-23 | Hunt; Kevin F. | Ball valve having a non-integral upstream seat and at least one integral downstream seat |
| CN201909060U (en) * | 2010-12-23 | 2011-07-27 | 曾品其 | High-temperature metal sealing oxygen ball valve |
| CN202392154U (en) * | 2011-11-17 | 2012-08-22 | 四川格林流体控制设备有限公司 | Low-temperature ball valve |
| CN202756655U (en) * | 2012-08-20 | 2013-02-27 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve |
| CN203297659U (en) * | 2013-06-04 | 2013-11-20 | 方圆阀门集团有限公司 | Hard-sealing and high-temperature ball valve |
| CN103629388A (en) * | 2013-11-27 | 2014-03-12 | 凯喜姆阀门有限公司 | Low-temperature fixed ball valve |
| CN203548984U (en) * | 2013-11-07 | 2014-04-16 | 华东阀门有限公司 | Low-temperature ball valve |
| CN203718008U (en) * | 2013-12-18 | 2014-07-16 | 雷蒙德（北京）阀门制造有限公司 | Floating type rigid sealing ball valve |
| CN204805603U (en) * | 2015-07-22 | 2015-11-25 | 雷蒙德(北京)科技股份有限公司 | High temperature metal ball valve that floats sealed firmly |
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2015
- 2015-07-22 CN CN201510434645.0A patent/CN104989841A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6065736A (en) * | 1996-10-15 | 2000-05-23 | Hunt; Kevin F. | Ball valve having a non-integral upstream seat and at least one integral downstream seat |
| CN201909060U (en) * | 2010-12-23 | 2011-07-27 | 曾品其 | High-temperature metal sealing oxygen ball valve |
| CN202392154U (en) * | 2011-11-17 | 2012-08-22 | 四川格林流体控制设备有限公司 | Low-temperature ball valve |
| CN202756655U (en) * | 2012-08-20 | 2013-02-27 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve |
| CN203297659U (en) * | 2013-06-04 | 2013-11-20 | 方圆阀门集团有限公司 | Hard-sealing and high-temperature ball valve |
| CN203548984U (en) * | 2013-11-07 | 2014-04-16 | 华东阀门有限公司 | Low-temperature ball valve |
| CN103629388A (en) * | 2013-11-27 | 2014-03-12 | 凯喜姆阀门有限公司 | Low-temperature fixed ball valve |
| CN203718008U (en) * | 2013-12-18 | 2014-07-16 | 雷蒙德（北京）阀门制造有限公司 | Floating type rigid sealing ball valve |
| CN204805603U (en) * | 2015-07-22 | 2015-11-25 | 雷蒙德(北京)科技股份有限公司 | High temperature metal ball valve that floats sealed firmly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285231A (en) * | 2019-07-23 | 2019-09-27 | 欧维克集团有限公司 | A kind of new energy industry high temperature and pressure hard seal ball valve |
| CN110701335A (en) * | 2019-10-30 | 2020-01-17 | 昆山维萨阀门股份有限公司 | Large-caliber one-way high-temperature hard-seal floating ball valve |
| CN113847446A (en) * | 2021-10-09 | 2021-12-28 | 欧维克集团有限公司 | Ball valve with ceramic lining |
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