CN111946854A - High-performance cutting-off adjusting ball valve - Google Patents
High-performance cutting-off adjusting ball valve Download PDFInfo
- Publication number
- CN111946854A CN111946854A CN202010828333.9A CN202010828333A CN111946854A CN 111946854 A CN111946854 A CN 111946854A CN 202010828333 A CN202010828333 A CN 202010828333A CN 111946854 A CN111946854 A CN 111946854A
- Authority
- CN
- China
- Prior art keywords
- cutting
- valve
- ball body
- valve rod
- adjusting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
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
-
- 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
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a high-performance cutting-off regulating ball valve which comprises a valve body, a valve seat, a ball body, a valve rod, a valve cover and a handle and is characterized in that the ball body consists of a cutting-off ball body and a regulating ball body, wherein the regulating ball body is embedded in a spherical inner cavity of the cutting-off ball body, and the cutting-off ball body and the regulating ball body can rotate independently. In the closing process, firstly rotating the adjusting ball body, closing the flow channel of the cutting ball body, then rotating the cutting ball body to be in sealing fit with the valve seat, in the opening process, firstly rotating the cutting ball body, then rotating the adjusting ball body to open the flow channel, in the opening and closing process, the cutting ball body always rotates under the static state of a medium, and the medium does not scour the sealing surface of the cutting ball body; when the flow is regulated, the cut-off ball body is positioned at the full-open position, the opening regulation is realized by rotating the regulating ball body, and the medium scours the surface of the regulating ball body without influencing the sealing performance and the regulating precision of the product. Has the advantages of reliable sealing performance, long service life and the like.
Description
Technical Field
The invention belongs to the field of valves, and particularly relates to a ball valve. The invention is suitable for opening and closing medium conveying pipelines and flow regulating valves in the industries of metallurgy, electric power, petroleum, chemical engineering and the like.
Background
The ball valve is a preferred valve of medium conveying pipelines in various fields of national economy due to the advantages of simple structure, convenient opening and closing, full circulation and the like. The structure of the valve comprises a valve body, a valve seat, a ball body, a valve rod and a transmission mechanism, wherein the surface of the ball body is matched with the valve seat to form a sealing pair, and the opening and closing operation of the valve is realized through 90-degree rotation of the ball body. However, the existing ball valve products also have a number of fatal disadvantages: firstly, in the opening and closing process, when a ball body is just opened and is to be closed, the opening degree of a ball body flow passage and a valve body passage is very small, the flow velocity of fluid is very high, and great scouring force is generated on the wall of an inner cavity of the valve body; meanwhile, the inlet fluid generates high-speed rotational flow on the surface of the ball body, so that the surface of the ball body is greatly washed, the sealing matching performance of the ball body and the valve seat is reduced, the valve is not closed tightly, and sealing leakage is generated. Secondly, when the ball valve is used for adjusting the flow, the surface of the ball body is washed by a medium for a long time, so that a plurality of uneven pits are generated on the surface of the ball body, the sealing matching performance of the ball body and the valve seat is reduced, the sealing is not tight, and the sealing leakage is generated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-performance cutting and adjusting ball valve which has the advantages of no scouring of the medium on the inner cavity wall of the valve body and the sealing surface of the ball body in the opening and closing or adjusting process, reliable sealing performance and long service life.
The technical scheme of the invention comprises a valve body, a valve seat, a ball body, a valve rod, a valve cover and a handle, wherein the surface of the ball body is matched with the sealing surface of the valve seat to form a sealing pair; the method is characterized in that: the ball body consists of a cutting ball body and an adjusting ball body, the valve rod consists of a cutting valve rod and an adjusting valve rod, and the handle consists of a cutting handle and an adjusting handle; the outer spherical surface of the cutting sphere is matched with the sealing surface of the valve seat to form a sealing pair, and the center of a flow passage of the cutting sphere is provided with a spherical inner cavity; the adjusting ball body is of a ball clack structure, the ball clack is embedded in the spherical inner cavity of the cut-off ball body, and the outer spherical surface of the adjusting ball body is in dynamic sealing fit with the wall of the spherical inner cavity of the cut-off ball body; the cutting valve rod is of a hollow cylinder structure, the outer circular surface of the lower end of the cutting valve rod is fixedly connected with the upper end of the cutting ball, the upper end of the cutting valve rod penetrates through the upper end surface of the valve cover and is fixedly connected with the cutting handle, and a packing sealing device is arranged between the outer circular surface and the valve cover; the adjusting valve rod is inserted into an inner hole of the cutting valve rod, the outer circular surface of the adjusting valve rod is in dynamic sealing fit with the inner hole wall of the cutting valve rod, the lower end of the adjusting valve rod is fixedly connected with the upper end of the adjusting ball body, and the upper end of the adjusting valve rod penetrates through the upper end face of the cutting valve rod and is fixedly connected with the adjusting handle.
Preferably, the adjusting ball is provided with a V-shaped opening at the front end in the closing rotation direction, and the projection of the center line of the V-shaped opening in the horizontal direction is coincident with the center line of the valve body passage.
Preferably, an opening degree indicating device is arranged between the regulating valve rod and the valve cover, and the opening degree indicating device consists of a dial and a scale pointer, wherein the dial is fixedly arranged on the regulating valve rod, and the scale pointer is fixedly arranged on the valve cover.
Preferably, a bearing is arranged between the upper end face of the stop valve rod and the lower end face of the adjusting handle.
Preferably, a plurality of O-shaped rings are arranged between the inner hole wall of the cutting valve rod and the outer circular surface of the adjusting valve rod.
Preferably, the lower end of the cutting ball body is provided with a positioning shaft, the central line of the positioning shaft is superposed with the central line of the cutting valve rod, the lower end of the positioning shaft is movably matched with a positioning hole on the wall of the inner cavity of the valve body, and the upper end of the positioning shaft is movably matched with a positioning hole at the lower end of the adjusting ball body.
Preferably, a middle cavity first sealing pair is arranged between the outer circular surface of the cutting valve rod and the lower end face of the valve cover, the middle cavity first sealing pair is formed by mutually matching a radial annular convex shoulder of the outer circular surface of the cutting valve rod and a radial step of the lower end face of the valve cover, and a sealing gasket is arranged between the upper annular surface of the radial annular convex shoulder and the radial step.
Compared with the prior art, the invention has the beneficial effects that: the ball body consists of a cutting ball body and an adjusting ball body, the adjusting ball body is embedded in a spherical inner cavity of the cutting ball body, and the cutting ball body and the adjusting ball body can rotate independently. In the closing process, firstly rotating the adjusting ball body, closing a flow channel of the cutting ball body, then rotating the cutting ball body to be in sealing fit with the valve seat, in the opening process, firstly rotating the cutting ball body, then rotating the adjusting ball body to open the flow channel, in the opening and closing process, the cutting ball body always rotates in a medium static state, a sealing surface of the cutting ball body is always contacted with a static medium, and the medium does not scour the sealing surface of the cutting ball body; when the flow is regulated, the cut-off ball body is positioned at the full-open position, the opening regulation is realized by rotating the regulating ball body, and the medium scours the surface of the regulating ball body without influencing the sealing performance and the regulating precision of the product. The ball valve solves the technical problem that the surface of the ball is easy to be damaged and scrapped by media scouring in the opening, closing and adjusting processes of the ball valve, and has the advantages of reliable sealing performance, long service life and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the valve comprises a valve body, 2, a cut-off ball body, 3, a valve seat, 4, an adjusting ball body, 5, an adjusting valve rod, 6, a sealing gasket, 7, packing, 8, a packing gland, 9, a cut-off handle, 10, an adjusting handle, 11, a scale pointer, 12, a screw, 13, a dial, 14, a bearing, 15, an O-shaped ring, 16, a valve cover, 17, a radial annular convex shoulder, 18, a cut-off valve rod, 19 a positioning shaft and 20 a disc spring.
Detailed Description
The high-performance cutting-off regulating ball valve shown in figure 1 comprises a valve body 1, a valve seat 3, a ball body, a valve rod, a valve cover 16 and a handle, wherein the surface of the ball body is matched with the sealing surface of the valve seat 3 to form a sealing pair, the valve seat 3 is arranged in an inlet and outlet channel of the valve body 1, and a disc spring 20 is arranged between the back surface of the valve seat 3 and a radial step of the channel of the valve body 1; the method is characterized in that: the ball body comprises a cutting ball body 2 and an adjusting ball body 4, the valve rod comprises a cutting valve rod 18 and an adjusting valve rod 5, and the handle comprises a cutting handle 9 and an adjusting handle 10; the external spherical surface of the cutting ball 2 is matched with the sealing surface of the valve seat 3 to form a sealing pair, the cutting ball 2 is provided with a flow passage with the same diameter as the valve body 1, and the center of the flow passage is provided with a spherical inner cavity; the adjusting ball body 4 is of a ball petal structure, the ball petal is embedded in a spherical inner cavity of the cut ball body 2, the outer spherical surface of the adjusting ball body is in dynamic sealing fit with the wall of the spherical inner cavity of the cut ball body 2, the ball petal plane diameter of the adjusting ball body 4 is larger than the diameter of a flow passage of the cut ball body 2, the flow passage of the cut ball body 2 can be completely sealed when the adjusting ball body 4 is closed, the adjusting ball body 4 can be integrally hidden in the spherical inner cavity of the cut ball body 2 when opened, no additional flow resistance is caused to fluid, the ball petal plane diameter refers to the plane diameter of the excircle of the ball petal spherical surface vertical to the central line of a valve body passage, and the cut ball body 2, the adjusting ball body 4 and the; the cutting valve rod 18 is of a hollow cylinder structure, the outer circular surface of the lower end of the cutting valve rod is fixedly connected with the upper end of the cutting sphere 2, the upper end of the cutting valve rod penetrates through the upper end surface of the valve cover 16 and is fixedly connected with the cutting handle 9, a packing sealing device is arranged between the outer circular surface and the valve cover 16 and consists of a packing 7 and a packing gland 8, and the outer circular surface of the lower end of the cutting valve rod 18 and the cutting sphere 2 can be welded or integrally processed and formed; the adjusting valve rod 5 is inserted into the inner hole of the cut-off valve rod 18, the outer circular surface of the adjusting valve rod is in dynamic sealing fit with the inner hole wall of the cut-off valve rod 18, the lower end of the adjusting valve rod is fixedly connected with the upper end of the adjusting ball body 4, and the upper end of the adjusting valve rod penetrates through the upper end face of the cut-off valve rod 18 and is fixedly connected with the adjusting handle. At the overall process of opening and close, cut off spheroid 2 and rotate under medium quiescent condition all the time, cut off 2 sealed faces of spheroid and contact with static medium all the time, the medium does not have to erode cutting off 2 sealed faces of spheroid, only produces to adjusting the sphere of spheroid 4 and erodees, and does not influence the sealing performance and the regulation precision of sealed pair to the erodeing of adjusting 4 spheres, moreover, even adjust spheroid 4 receive erode when serious, only need change adjust spheroid 4 can, avoid whole scrapping to cause the wasting of resources.
The front end of the adjusting sphere 4 in the closing rotation direction is provided with a V-shaped opening, the projection of the center line of the V-shaped opening in the horizontal direction is superposed with the center line of the channel of the valve body 1, when the adjusting sphere 4 is closed, the bottom end of the V-shaped opening cuts off the fluid at last, when the adjusting sphere is opened, the bottom end of the V-shaped opening opens the fluid at first, the high-speed fluid in the opening and closing process is guided to the center of the channel, and the scouring of the high-speed fluid on the cutting sphere 2 is reduced.
An opening indicating device is arranged between the adjusting valve rod 5 and the valve cover 16 and consists of a dial 13 and a scale pointer 11, the dial 13 is fixedly installed on the adjusting valve rod 5, the scale pointer 11 is fixedly installed on the valve cover 16, an opening indication is arranged on the dial 13, and when the dial 13 rotates along with the adjusting valve rod 5, the opening indication at the scale pointer 11 is the valve opening.
A bearing 14 is arranged between the upper end surface of the cutting valve rod 18 and the lower end surface of the adjusting handle 10, a dial 13 is fixedly arranged on the adjusting valve rod 5 between the adjusting handle 10 and the bearing 14, and the adjusting handle 10 is arranged at the upper end of the adjusting valve rod 5 through a screw 12 and a pressing plate.
A plurality of O-shaped rings 15 are arranged between the inner hole wall of the cutting valve rod 18 and the outer circular surface of the adjusting valve rod 5.
The lower end of the cutting sphere 2 is provided with a positioning shaft 19, the central line of the positioning shaft 19 is superposed with the central line of the cutting valve rod 18, the lower end is movably matched with a positioning hole on the inner cavity wall of the valve body 1, and the upper end is movably matched with a positioning hole at the lower end of the adjusting sphere 4.
A middle cavity first sealing pair is arranged between the outer circular surface of the cutting valve rod 18 and the lower end surface of the valve cover 16, the middle cavity first sealing pair is formed by mutually matching a radial annular convex shoulder 17 of the outer circular surface of the cutting valve rod 18 and a radial step of the lower end surface of the valve cover 16, a sealing gasket 6 is arranged between the upper annular surface of the radial annular convex shoulder 17 and the radial step, and a middle cavity double sealing structure is formed by the middle cavity first sealing pair and a packing sealing device, so that the sealing performance of the middle cavity is improved.
The opening and closing operation process comprises the following steps: when the valve is closed, the adjusting ball body 4 is rotated firstly, the flow channel of the cutting ball body 2 is sealed, so that the medium of the inlet channel of the valve body 1 does not flow, then the cutting ball body 2 is rotated to be in sealing fit with the valve seat 3, the cutting ball body 2 rotates in the static medium, and the medium does not scour the surface of the cutting ball body 2; when the cutting-off device is opened, the cutting-off ball body 2 rotates to a full-open position firstly, then the adjusting ball body 4 rotates to a full-open position, the cutting-off ball body 2 rotates in a static medium in the opening process, and the medium does not scour the surface of the cutting-off ball body 2; when the opening degree is adjusted, the cutting ball 2 is positioned at the full opening position, and the opening degree is adjusted by rotating the adjusting ball 4.
Claims (7)
1. A high-performance cutting-off regulating ball valve comprises a valve body (1), a valve seat (3), a ball body, a valve rod, a valve cover (16) and a handle, wherein the surface of the ball body is matched with the sealing surface of the valve seat (3) to form a sealing pair; the method is characterized in that: the ball body comprises a cutting ball body (2) and an adjusting ball body (4), the valve rod comprises a cutting valve rod (18) and an adjusting valve rod (5), and the handle comprises a cutting handle (9) and an adjusting handle (10); the outer spherical surface of the cutting sphere (2) is matched with the sealing surface of the valve seat (3) to form a sealing pair, the cutting sphere (2) is provided with a flow channel with the same diameter as the valve body (1), and the center of the flow channel is provided with a spherical inner cavity; the adjusting ball body (4) is of a ball clack structure, the ball clack is embedded in the spherical inner cavity of the cut-off ball body (2), and the outer spherical surface of the adjusting ball body is in dynamic sealing fit with the wall of the spherical inner cavity of the cut-off ball body (2); the cutting valve rod (18) is of a hollow cylinder structure, the outer circular surface of the lower end of the cutting valve rod is fixedly connected with the upper end of the cutting sphere (2), the upper end of the cutting valve rod penetrates through the upper end surface of the valve cover (16) and is fixedly connected with the cutting handle (9), and a packing sealing device is arranged between the outer circular surface and the valve cover (16); the adjusting valve rod (5) is sleeved in an inner hole of the cutting valve rod (18), the outer circular surface of the adjusting valve rod is in dynamic sealing fit with the inner hole wall of the cutting valve rod (18), the lower end of the adjusting valve rod is fixedly connected with the upper end of the adjusting ball body (4), and the upper end of the adjusting valve rod penetrates through the upper end face of the cutting valve rod (18) and is fixedly connected with the adjusting handle (10).
2. The high performance trip regulating ball valve of claim 1, further comprising: the front end of the adjusting ball body (4) in the closing rotation direction is provided with a V-shaped opening, and the projection of the central line of the V-shaped opening in the horizontal direction is superposed with the central line of the channel of the valve body (1).
3. A high performance shutoff modulating ball valve as defined in claim 1 or 2 wherein: an opening degree indicating device is arranged between the adjusting valve rod (5) and the valve cover (16), the opening degree indicating device is composed of a dial (13) and a scale pointer (11), the dial (13) is fixedly installed on the adjusting valve rod (5), and the scale pointer (11) is fixedly installed on the valve cover (16).
4. A high performance shutoff modulating ball valve as defined in claim 1 or 2 wherein: a bearing (14) is arranged between the upper end surface of the cutting valve rod (18) and the lower end surface of the adjusting handle (10).
5. A high performance shutoff modulating ball valve as defined in claim 1 or 2 wherein: a plurality of O-shaped rings (15) are arranged between the inner hole wall of the cutting valve rod (18) and the outer circular surface of the adjusting valve rod (5).
6. A high performance shutoff modulating ball valve as defined in claim 1 or 2 wherein: the lower end of the cutting ball body (2) is provided with a positioning shaft (19), the central line of the positioning shaft (19) is superposed with the central line of the cutting valve rod (18), the lower end of the positioning shaft is movably matched with a positioning hole on the inner cavity wall of the valve body (1), and the upper end of the positioning shaft is movably matched with a positioning hole at the lower end of the adjusting ball body (4).
7. A high performance shutoff modulating ball valve as defined in claim 1 or 2 wherein: a middle cavity first sealing pair is arranged between the outer circular surface of the cutting valve rod (18) and the lower end surface of the valve cover (16), the middle cavity first sealing pair is formed by mutually matching a radial annular convex shoulder (17) of the outer circular surface of the cutting valve rod (18) and a radial step of the lower end surface of the valve cover (16), and a sealing gasket (6) is arranged between the upper circular surface of the radial annular convex shoulder (17) and the radial step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828333.9A CN111946854A (en) | 2020-08-18 | 2020-08-18 | High-performance cutting-off adjusting ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828333.9A CN111946854A (en) | 2020-08-18 | 2020-08-18 | High-performance cutting-off adjusting ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111946854A true CN111946854A (en) | 2020-11-17 |
Family
ID=73343560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010828333.9A Pending CN111946854A (en) | 2020-08-18 | 2020-08-18 | High-performance cutting-off adjusting ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111946854A (en) |
-
2020
- 2020-08-18 CN CN202010828333.9A patent/CN111946854A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200072360A1 (en) | Sealing structure of a five-dimensional eccentric valve | |
| US4226263A (en) | Erosion control trim in a control mechanism for a ball valve | |
| CN110052793B (en) | Machining method of butterfly valve body structure | |
| CN212509628U (en) | High-performance adjusting ball valve | |
| CN111946854A (en) | High-performance cutting-off adjusting ball valve | |
| CN210218749U (en) | Spring compensation type plug valve with movable valve seat | |
| CN112344046A (en) | Control valve with electromagnetism cuts off fast | |
| CN105042123A (en) | Supercritical Y-shaped internally-hung hard self-sealing flap-turning check valve | |
| CN211288775U (en) | Ultra-low temperature butterfly valve | |
| CN210440623U (en) | Multifunctional heavy hammer self-operated double-sealing swing check valve | |
| US20200080648A1 (en) | Deformed spherical eccentric valve | |
| CN212986110U (en) | Double-sealing seat ball valve with replaceable valve seat | |
| CN205101574U (en) | Valve body, Seat kits of two eccentric cast iron butterfly valves of soft seal | |
| CN216242429U (en) | Low-noise high-pressure adjusting ball valve | |
| CN220302766U (en) | Spherical butterfly valve | |
| CN215487778U (en) | Light-torque V-shaped ball valve | |
| CN212131372U (en) | High-pressure groove ball valve | |
| CN2663751Y (en) | On-line maintenance pipeline ball valve | |
| CN219588159U (en) | Hard seal fixed ball valve | |
| CN214367836U (en) | Anti-static double-eccentric soft sealing butterfly valve | |
| CN213776407U (en) | Aluminum alloy opposite-clamping butterfly valve | |
| CN214063849U (en) | Ball valve with high wear resistance | |
| CN212564441U (en) | Deformed spherical eccentric line surface double-sealing valve | |
| CN218440774U (en) | Program control valve for S-Zorb device | |
| CN214662167U (en) | Pneumatic oxygen flow regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |