CN116877733A - Low-torque high-tightness low-temperature ball valve - Google Patents
Low-torque high-tightness low-temperature ball valve Download PDFInfo
- Publication number
- CN116877733A CN116877733A CN202311010395.9A CN202311010395A CN116877733A CN 116877733 A CN116877733 A CN 116877733A CN 202311010395 A CN202311010395 A CN 202311010395A CN 116877733 A CN116877733 A CN 116877733A
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- Prior art keywords
- valve
- valve body
- low
- ring
- ball
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
- F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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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
- F16K5/0689—Packings between housing and plug
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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
- F16K5/0694—Spindle sealings
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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
- F16K5/08—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Abstract
本发明公开了一种低扭矩高密封性低温球阀，包括阀体，所述阀体的两侧均固定安装有阀盖，所述阀体与所述阀盖之间通过螺栓固定连接，所述阀体的底部设置有枢轴，所述阀体的内部设置有阀座，所述阀体的内部通过所述阀座活动安装有球体，且所述枢轴与所述球体的连接处安装有滚动轴承和推力垫，所述阀体的顶部固定安装有压盖法兰，所述压盖法兰的内侧安装有阀杆，所述阀杆上套接安装有所述滚动轴承，且所述滚动轴承的顶部设置有推力垫，本发明解决了现有的常规低温球阀大都体积大，扭矩大，在低温液体介质的运输过程中占用空间大，操作复杂且成本高昂的问题。
The invention discloses a low-torque and high-sealing low-temperature ball valve, which includes a valve body. Valve covers are fixedly installed on both sides of the valve body. The valve body and the valve cover are fixedly connected by bolts. A pivot is provided at the bottom of the valve body, a valve seat is provided inside the valve body, a ball is movably installed inside the valve body through the valve seat, and a connection between the pivot and the ball is installed. Rolling bearings and thrust pads, a gland flange is fixedly installed on the top of the valve body, a valve stem is installed on the inside of the gland flange, the rolling bearing is sleeved on the valve stem, and the rolling bearing A thrust pad is provided on the top. The present invention solves the problems that most of the existing conventional cryogenic ball valves are large in size and torque, occupy a large space during the transportation of cryogenic liquid media, and are complex to operate and costly.
Description
Technical Field
The invention relates to the technical field of ball valves, in particular to a low-torque high-tightness low-temperature ball valve.
Background
The ball valve, the opening and closing piece (sphere) is driven by the valve rod and rotates around the axis of the ball valve. The device can also be used for regulating and controlling fluid, wherein the hard seal V-shaped ball valve has strong shearing force between the V-shaped ball core and the metal valve seat of the hard alloy for surfacing, and is particularly suitable for mediums containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the flow direction switching of the medium on the pipeline, and simultaneously can close any channel to connect the other two channels;
the existing conventional low-temperature ball valves are large in size and large in torque, two-way low-temperature ball valves are more required to complete output control of low-temperature liquid media, occupied space is large in the transportation process of the low-temperature liquid media, operation is complex, cost is high, and in view of the fact, the low-torque high-tightness low-temperature ball valve is provided.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the low-torque high-tightness low-temperature ball valve, which solves the problems that the prior conventional low-temperature ball valve is large in size, large in torque, large in occupied space in the transportation process of the low-temperature liquid medium, complex in operation and high in cost, and the two-way low-temperature ball valve can finish the output control of the low-temperature liquid medium only by two ways.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a low-torque high leakproofness low temperature ball valve, includes the valve body, the equal fixed mounting in both sides of valve body has the valve gap, the valve body with pass through bolt fixed connection between the valve gap, the bottom of valve body is provided with the pivot, the inside of valve body is provided with the disk seat, the inside of valve body passes through disk seat movable mounting has the spheroid, just the pivot with spheroidal junction installs antifriction bearing and thrust pad, the top fixed mounting of valve body has the gland flange, the valve rod is installed to the inboard of gland flange, cup jointed on the valve rod and install antifriction bearing, just antifriction bearing's top is provided with thrust pad, through installing antifriction bearing, great reduction the moment of torsion (generally speaking, because the very short demand that the handle needs to do, so can't increase the force, be added antifriction bearing and reduce frictional force, and then reduce the moment that the valve opened and shut, further reduce the handle moment that the handle opened and shut), the top fixed mounting of valve rod has the handle, the bottom of valve rod with spheroid fixed connection.
Preferably, the sphere is of an L-shaped channel structure, a 90-degree positioning bayonet is formed in the top of the gland flange, and the handle is located on the inner side of the 90-degree positioning bayonet;
by adopting the technical scheme: the ball body can be rotated by 90 degrees to finish the switching of the low-temperature fluid medium channel by only rotating the handle from the position D to the position E of the 90-degree positioning bayonet, and compared with the normal structure of the handle of the ball valve, the structure of the handle is simpler, convenient and accurate.
Preferably, an O-shaped ring and a universal plug ring are sleeved on the valve rod, the O-shaped ring is positioned at the top of the universal plug ring, the O-shaped ring and the universal plug ring are both positioned in the gland flange, a filler backing ring is arranged between the O-shaped ring and the universal plug ring, and a filler gland nut is arranged at the top of the O-shaped ring;
by adopting the technical scheme: and then can prevent dust, thereby can avoid the impurity in the air to get into valve rod sealing department and destroy valve rod leakproofness.
Preferably, a groove is formed in the valve seat, and a spring energy storage ring is arranged on the inner side of the groove;
by adopting the technical scheme: when fluid medium flows through the internal channel of the valve body, the groove of the valve seat is extruded by the pressure of the valve cavity medium, so that the valve seat is tightly attached to the ball body and the valve cover, and good tightness is kept, and under the low-temperature working condition, the valve seat can generate a certain shrinkage, at the moment, the spring energy storage ring in the groove can provide elastic force compensation, so that the valve seat still keeps good tightness, and the friction between the valve seat and the ball body of the structure is smaller, so that the generated torque is also reduced.
Preferably, sealing gaskets are arranged at the joint of the valve body and the valve cover and the joint of the valve body and the gland flange, and the sealing gaskets are made of PCTFE (prestressed concrete cylinder-block) materials;
by adopting the technical scheme: compared with the conventional PTFE and RPTFE materials, the PCTFE has better sealing performance under the low-temperature working condition.
(III) beneficial effects
The invention provides a low-torque high-tightness low-temperature ball valve. The beneficial effects are as follows:
(1) The ball valve seat with the structure is designed into a groove and is provided with a spring energy storage ring structure, so that the ball valve with the structure keeps good tightness under the low-temperature working condition, and the structure is different from the interference seal of the common valve seat, thereby achieving the purpose of reducing torque;
(2) The ball body and the pivot of the ball valve with the structure are connected with the flange of the gland by the rolling bearing, so that the friction force is smaller, and the torque of the ball valve with the structure is smaller;
(3) The gland flange of the ball valve with the structure is provided with the 90-degree limiting notch, so that compared with other ball valves of the same type, the gland flange of the ball valve with the structure does not need more positioning parts, and the positioning is more accurate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a flow chart of media in one state of the invention;
FIG. 3 is a flow chart of media in another state of the invention.
Fig. 4 is a handle positioning chart in accordance with the present invention.
In the figure: 1. a valve cover; 2. a valve body; 3. a sphere; 4. a pivot; 5. a sealing gasket; 6. a valve stem; 7. a gland flange; 8. a gland nut; 9. an O-ring; 10. a packing backing ring; 11. a plug ring; 12. a rolling bearing; 13. a thrust pad; 14. a valve seat; 15. a handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution:
embodiment one: the low-torque high-tightness low-temperature ball valve comprises a valve body 2, wherein valve caps 1 are fixedly arranged on two sides of the valve body 2, the valve body 2 is fixedly connected with the valve caps 1 through bolts, a pivot 4 is arranged at the bottom of the valve body 2, a valve seat 14 is arranged in the valve body 2, a ball body 3 is movably arranged in the valve body 2 through the valve seat 14, a rolling bearing 12 is arranged at the joint of the pivot 4 and the ball body 3, a gland flange 7 is fixedly arranged at the top of the valve body 2, a valve rod 6 is arranged at the inner side of the gland flange 7, the rolling bearing 12 is sleeved on the valve rod 6, a thrust pad 13 is arranged at the top of the rolling bearing 12, the torque of the structure is greatly reduced (generally, because of the short requirement of a handle, the force cannot be increased, namely the rolling bearing is added to reduce friction force, further reduces the torque of opening and closing the valve and further reduces the moment of opening and closing the handle 15), the top end of the valve rod 6 is fixedly provided with the handle 15, the bottom end of the valve rod 6 is fixedly connected with the ball body 3, the ball body 3 is of an L-shaped channel structure, the top of the gland flange 7 is provided with a 90-degree positioning bayonet, the handle 15 is positioned at the inner side of the 90-degree positioning bayonet, the handle 15 is screwed from the D position to the E position of the positioning bayonet (as shown in figure 4), the ball body 3 can be rotated by 90 degrees to complete the switching of a low-temperature fluid medium channel, the valve rod 6 is sleeved with an O-shaped ring 9 and a universal plug ring 11, the O-shaped ring 9 is positioned at the top of the universal plug ring 11, the O-shaped ring 9 and the universal plug ring 11 are both positioned in the gland flange 7, a filler backing ring 10 is arranged between the O-shaped ring 9 and the universal plug ring 11, the top of the O-shaped ring 9 is provided with a filler gland nut 8, and further dust prevention can be carried out, can avoid impurity in the air to get into valve rod sealing department and thereby destroy valve rod leakproofness, thereby valve seat 14 department has seted up flutedly, spring energy storage circle is installed to the inboard of recess, when fluid medium flows through valve body 2 internal passage, valve seat 14 recess department can be pressed by valve pocket medium pressure and make valve seat 14 and spheroid 3, the valve gap is hugged closely, good leakproofness has been kept, and under low temperature operating mode, valve seat 14 will produce certain shrinkage, spring energy storage circle in the recess can provide elasticity compensation and make valve seat 14 still keep good leakproofness this moment, sealing gasket 5 is all installed to the junction of valve body 2 and valve gap 1 and valve body 2 and gland flange 7, sealing gasket 5 is PCTFE material, compare conventional PTFE and RPTFE material, PCTFE possess better leakproofness under low temperature operating mode.
Working principle: the ball valve is a low-temperature three-way ball valve, two valve caps 1 are connected with a valve body 2 through bolts, a pivot 4 is arranged at the bottom of the valve cap and used for fixing a ball body 3, a rolling bearing 12 is arranged at the joint of the pivot 4 and the ball body 3, the torque of the ball valve is greatly reduced (generally, because of the short requirement of a handle, the force cannot be increased, the rolling bearing is added to reduce the friction force, further reduce the opening and closing torque of the valve, further reduce the opening and closing torque of the handle), the ball body 3 is an L-shaped channel, the top of the ball body 3 is connected with a valve rod 6, a handle 15 is arranged on the valve rod 6, a 90-degree positioning bayonet is arranged at the top of a gland flange 7, the ball body 3 can be rotated by 90 degrees to complete the switching of a low-temperature fluid medium channel, the ball valve adopts an O-shaped ring 9 and a plug ring 11 sealing structure at the valve rod 6, the O-shaped ring 9 prevents dust, impurities in air can be prevented from entering the sealing position of the valve rod to damage the sealing performance of the valve rod, a groove and a spring energy storage ring are arranged at the valve seat 14, when a fluid medium passes through an L channel as shown in the flow chart of fig. 2 and 3, the valve seat groove can be pressed by the pressure of the valve cavity medium to enable the valve seat 14 to be tightly attached to the ball body 3, the valve cover 1 keeps good sealing performance, and under a low-temperature working condition, the valve seat 14 can generate a certain shrinkage, at the moment, the spring energy storage ring in the groove can provide elastic force compensation to enable the valve seat 14 to keep good sealing performance, and the sealing gasket 5 made of PCTFE material is used at the positions of the valve body 2 and the valve cover 1, the valve body 2 and the gland flange 7.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Claims (7)
1. The utility model provides a low-temperature ball valve of low moment of torsion high leakproofness, includes valve body (2), its characterized in that: valve body (2) both sides equal fixed mounting have valve gap (1), valve body (2) with pass through bolt fixed connection between valve gap (1), the bottom of valve body (2) is provided with pivot (4), the inside of valve body (2) is provided with disk seat (14), the inside of valve body (2) is passed through disk seat (14) movable mounting has spheroid (3), just pivot (4) with antifriction bearing (12) and thrust pad (13) are installed to the junction of spheroid (3), the top fixed mounting of valve body (2) has gland flange (7), valve rod (6) are installed to the inboard of gland flange (7), install cup joints on valve rod (6) antifriction bearing (12), just the top of antifriction bearing (12) is provided with thrust pad (13), the top fixed mounting of valve rod (6) has handle (15), the bottom of valve rod (6) with spheroid (3) fixed connection.
2. The low torque high tightness cryogenic ball valve of claim 1, wherein: the sphere (3) is of an L-shaped channel structure.
3. The low torque high tightness cryogenic ball valve of claim 1, wherein: the top of the gland flange (7) is provided with a 90-degree positioning bayonet, and the handle (15) is positioned at the inner side of the 90-degree positioning bayonet.
4. The low torque high tightness cryogenic ball valve of claim 1, wherein: the valve rod (6) is sleeved with the rolling bearing (12), the O-shaped ring (9) and the universal plug ring (11), the O-shaped ring (9) is located at the top of the universal plug ring (11), and the rolling bearing (12) is located at the joint of the bottom of the valve rod (6) and the bottom of the gland flange (7).
5. The low torque high tightness cryogenic ball valve according to claim 4, characterized in that: the O-shaped ring (9) and the universal plug ring (11) are both positioned in the gland flange (7), a filler backing ring (10) is arranged between the O-shaped ring (9) and the universal plug ring (11), and a filler gland nut (8) is arranged at the top of the O-shaped ring (9).
6. The low torque high tightness cryogenic ball valve of claim 1, wherein: a groove is formed in the valve seat (14), and a spring energy storage ring is installed on the inner side of the groove.
7. The low torque high tightness cryogenic ball valve of claim 1, wherein: sealing gaskets (5) are arranged at the joint of the valve body (2) and the valve cover (1) and the joint of the valve body (2) and the gland flange (7), and the sealing gaskets (5) are made of PCTFE (prestressed concrete cylinder-block).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311010395.9A CN116877733A (en) | 2023-08-11 | 2023-08-11 | Low-torque high-tightness low-temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311010395.9A CN116877733A (en) | 2023-08-11 | 2023-08-11 | Low-torque high-tightness low-temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116877733A true CN116877733A (en) | 2023-10-13 |
Family
ID=88262197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311010395.9A Pending CN116877733A (en) | 2023-08-11 | 2023-08-11 | Low-torque high-tightness low-temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116877733A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118729311A (en) * | 2024-06-13 | 2024-10-01 | 厦门铭光能源科技有限公司 | A dual-channel economizer with anti-blocking function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285532A (en) * | 2008-05-19 | 2008-10-15 | 浙江沃尔达铜业有限公司 | Multi-gear valve |
| JP2011231877A (en) * | 2010-04-28 | 2011-11-17 | Denso Corp | Fluid control valve |
| CN103899783A (en) * | 2012-12-25 | 2014-07-02 | 沃泰工业阀门（中国）有限公司 | Elastic energy-storage sealing valve base |
| CN203730815U (en) * | 2014-03-28 | 2014-07-23 | 浙江永盛仪表有限公司 | Floating hard-sealing ball valve |
| CN204592382U (en) * | 2015-03-06 | 2015-08-26 | 宁波一机阀门制造有限公司 | A kind of novel three-body type fixed spherical valve |
| CN212177929U (en) * | 2020-05-09 | 2020-12-18 | 浙江欧菲石油设备有限公司 | Ultra-low temperature ball valve |
| CN216201087U (en) * | 2021-11-16 | 2022-04-05 | 依蔼希(江苏)管道控制系统有限公司 | Low-loss regulating valve packing structure |
-
2023
- 2023-08-11 CN CN202311010395.9A patent/CN116877733A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285532A (en) * | 2008-05-19 | 2008-10-15 | 浙江沃尔达铜业有限公司 | Multi-gear valve |
| JP2011231877A (en) * | 2010-04-28 | 2011-11-17 | Denso Corp | Fluid control valve |
| CN103899783A (en) * | 2012-12-25 | 2014-07-02 | 沃泰工业阀门（中国）有限公司 | Elastic energy-storage sealing valve base |
| CN203730815U (en) * | 2014-03-28 | 2014-07-23 | 浙江永盛仪表有限公司 | Floating hard-sealing ball valve |
| CN204592382U (en) * | 2015-03-06 | 2015-08-26 | 宁波一机阀门制造有限公司 | A kind of novel three-body type fixed spherical valve |
| CN212177929U (en) * | 2020-05-09 | 2020-12-18 | 浙江欧菲石油设备有限公司 | Ultra-low temperature ball valve |
| CN216201087U (en) * | 2021-11-16 | 2022-04-05 | 依蔼希(江苏)管道控制系统有限公司 | Low-loss regulating valve packing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118729311A (en) * | 2024-06-13 | 2024-10-01 | 厦门铭光能源科技有限公司 | A dual-channel economizer with anti-blocking function |
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