CN108591484A - A kind of multi-sealed bellows instrument valve - Google Patents
A kind of multi-sealed bellows instrument valve Download PDFInfo
- Publication number
- CN108591484A CN108591484A CN201810538174.1A CN201810538174A CN108591484A CN 108591484 A CN108591484 A CN 108591484A CN 201810538174 A CN201810538174 A CN 201810538174A CN 108591484 A CN108591484 A CN 108591484A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- bellows
- flap
- valve body
- 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.)
- Withdrawn
Links
- 238000012856 packing Methods 0.000 claims abstract description 22
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 17
- 230000008676 import Effects 0.000 claims description 2
- 239000002360 explosive Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
-
- 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
-
- 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
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
A kind of bellows instrument valve, including valve body, flap, valve rod, valve seat, bellows, pressure ring, valve deck, airtight and watertight padding pad, jam nut, stuffing box, clamp nut, handwheel；Valve body is equipped with inlet and outlet, inlet and outlet are on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat, valve seat is located on inlet and outlet channel, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close the keying of corresponding valve on valve seat, and the connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into the only hole of flap, corrugated stainless steel tubing is sleeved on valve rod, and bellows lower end is welded on the lower end of valve rod；Valve rod upper end bellows upper end flange is fixed on the circumference of pressure ring, and pressure ring is fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；Valve rod passes through pressure ring centre bore and upper cover center, valve stem tip to be equipped with the handwheel of bonding, and upper cover inner corrugated pipe top is equipped with stuffing box around the position of valve rod, and stuffing box includes Packing seat, filler, packing press ring.
Description
Technical field：
The present invention relates to a kind of instrument valve, be especially adapted for use in oil, chemical industry, power field application high pressure resistant and
The bellows instrument valve of high sealing performance.
Background technology：
With the high speed development of the national economy in China, it is suitable for oil, chemical industry, chemical fertilizer, pesticide, chemical fibre, papermaking, system
Sugar, food, power station, etc. industrial departments and agricultural or even living facilities purifier pipeline control system, to pipe-line system
Carry out the special valve of switch control.It is best suited for the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic
Upper carry out dual-seal.
Least it is exactly readily to seal for the valve of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic,
And high-pressure resistant corrugated pipe shut-off valve can carry out dual-seal under high-pressure situations.
Traditional bellows gauge valve, it is not high pressure resistant.It cannot be sealed well under high-pressure situations.Easily leakage, sealing surface is not
It is wear-resistant and not corrosion-resistant.Service life is short.Inconvenient for operation, maintenance cost is high.And high-pressure resistant corrugated pipe shut-off valve can be
Dual-seal is carried out under high-pressure situations.But the structure of bellows may make valve rod keep stable runnability can be difficult, meeting
Situations such as having situations such as deflection of valve rod that can make ripple tube damage.
Invention content：
Purpose of the present invention is to, propose a kind of bellows instrument valve, valve rod by equipped with positioning device (i.e. antirotation keys) protect
Hold the vertical of valve plate, when valve opening and closing, valve rod can limit operation, have be not easy to leak, sealing surface is wear-resistant and it is corrosion-resistant,
The advantages that service life is long.
The technical scheme is that bellows instrument valve, including valve body, flap, valve rod, valve seat, bellows, pressure ring,
Valve deck, airtight and watertight padding pad, jam nut, stuffing box (stuffing box includes Packing seat, filler, packing press ring), clamp nut, hand
Wheel；Valve body is equipped with inlet and outlet, and on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat, valve seat position to inlet and outlet
In on inlet and outlet channel, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close opening for corresponding valve on valve seat
It closes, the connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into the only hole of flap, and corrugated stainless steel tubing is sleeved on valve rod, wave
Line pipe lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；Valve rod upper end bellows upper end flange is fixed on
The circumference of pressure ring, pressure ring are fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；Valve rod passes through
Pressure ring centre bore and upper cover center, valve stem tip are equipped with the handwheel of bonding, are set around the position of valve rod above upper cover inner corrugated pipe
It includes Packing seat, filler, packing press ring to have stuffing box, stuffing box.
Equipped with clamp nut, the longitudinal section of clamp nut is door shape, and it is matched that upper cover top is equipped with clamp nut screw thread
Packing press ring is fixed on upper lid by screw thread, clamp nut.
Equipped with jam nut, the longitudinal section of jam nut is door shape, and valve body is equipped with the matched spiral shell of jam nut screw thread
Upper cover is fixed on valve body by line, jam nut.
Valve seat on inlet and outlet channel is a taper hole, and flap is taper, and taper flap is inserted into taper hole.
The position that corrugated stainless steel tubing is accommodated on valve body is a tubular.
The inlet and outlet of valve body, which are equipped with, takes over, and the connection version of take over inlet and outlet is set to there is flange, between importing and exporting and taking over
Equipped with sealing ring, it is equipped with union nut, the longitudinal section of union nut is door shape, and the inlet and outlet of valve body are tubulose, the outside of pipe
It is matched with the internal thread of union nut equipped with external screw thread, union nut, which will take over, to be fixed in inlet and outlet.
Position of the valve rod above bellows is equipped with the sealing of Packing seat, composite filling.
Bellows valve is best suited on the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic.
The present invention uses the valve rod of the fully wrapped around shut-off valve of bellows, in addition the stuffing box sealing on valve rod, can prevent work
Skill fluid etch valve rod；If can also avoid leaking using dual Seal Design ripple tube failure valve stem packing, bellows is welded in
Valve rod keeps stable runnability, avoids causing valve rod to vibrate due to valve plug vibration.Be best suited for steam, it is inflammable, explosive, lead
On the pipeline of the media such as deep fat, high-purity, toxic.
Advantageous effect：Bellows stop valve product of the present invention has the following advantages, is used inside the bellows stop valve
Bellows, using dual Seal Design, position of the valve rod above bellows is equipped with Packing seat, composite filling seals, if wave
The valve stem packing of line tube failure can also avoid leaking, and bellows is welded in the runnability that valve rod keeps stable, avoids shaking due to valve plug
It is dynamic that valve rod is caused to vibrate.And valve body solid forging structure, proof strength reach long service life.Using high voltage bearing wave
Line pipe ensures the sealing performance under high pressure working condition.It is convenient, flexible using the inlet and outlet of welding take over connecting valve, it reaches
To long service life.Multi-sealed high voltage bearing bellows is taken, ensures the sealing performance under high pressure working condition.Using
Anti- bellows rotational structure ensures that bellows is not destroyed, ensures bellows working performance.Flap uses built-up welding not with sealing surface
Same hard alloy, wear-resistant and corrosion resistance are strong；It is applied widely.Instrument valve arrangement of the present invention is concise, and sealing effect is good.Valve
The inlet and outlet of body are equipped with to take over has the structure quickly connected, the connection especially suitable for instrument with union nut.
Description of the drawings：
Fig. 1 is schematic structural view of the invention.
Specific implementation mode：
As shown, 1, welded type is taken over, 2, sealing ring, 3, valve body, 4, union nut, 5, flap, 6, bellows, 7, pressure
Ring, that is, anti-rotational group of cyclization, 8, airtight and watertight padding, 9, jam nut, 10, stuffing box, 11, Packing seat, 12, filler, 13, filler pressure
Ring, 14, clamp nut, 15, handwheel, 16, valve rod.
Bellows instrument valve, including valve body, flap, valve rod, valve seat, bellows, pressure ring, valve deck, airtight and watertight padding pad, spelling are tightly
Nut, stuffing box (stuffing box includes Packing seat, filler, packing press ring), clamp nut, handwheel；Valve body solid forging structure is protected
Intensity is demonstrate,proved, connection is taken over using welding, it is convenient, flexible.Valve body is equipped with inlet and outlet, and welded type takes over, and 2, sealing ring, 3, valve body,
4, union nut；On an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat to inlet and outlet, and it is logical that valve seat is located at inlet and outlet
On road, the valve seat on inlet and outlet channel is a taper hole shape, and flap is that taper, taper flap and taper hole coordinate, valve rod and flap
It is fixed, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close the keying for corresponding to valve, stainless steel wave on valve seat
Line pipe sleeve is on valve rod, and the position of corrugated stainless steel tubing is a tubular on valve body, and corrugated stainless steel tubing is using triple high voltage bearing
Bellows.Bellows lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；It turns over valve rod upper end bellows upper end
While being fixed on the circumference of pressure ring, pressure ring is fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；
Valve rod passes through pressure ring centre bore and upper cover center, valve stem tip to be equipped with the handwheel of bonding, and the position above upper cover inner corrugated pipe is set
It includes Packing seat, filler, packing press ring to have stuffing box, stuffing box, constitutes the design of dual airtight and watertight padding case, sealed reliable.Hand
When wheel belt ovable valve stem up and down motion opening/shutting valve, in the telescopic extensions of corrugated stainless steel tubing, the sealing of corrugated stainless steel tubing is complete
It is not affected entirely.Pressure ring, that is, anti-bellows rotation combination ring.The connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into valve
In the only hole of valve, valve rod end rotary sleeve axis is an enlarged footing, and only hole is the neck bore for accommodating enlarged footing.
Equipped with clamp nut, the longitudinal section of clamp nut is door shape, and it is matched that upper cover top is equipped with clamp nut screw thread
Screw thread, clamp nut are used to packing press ring being fixed on upper lid.Flap uses built-up welding different hardness alloy with sealing surface.
Equipped with jam nut, the longitudinal section of jam nut is door shape, and valve body is equipped with the matched spiral shell of jam nut screw thread
Line, for upper cover to be fixed on valve body.
The inlet and outlet of valve body, which are equipped with, takes over, and the connection version of take over inlet and outlet is set to there is flange, imports and exports and take over (method
It is blue) between be equipped with sealing ring, be equipped with union nut, the longitudinal section of union nut is door shape, and the inlet and outlet of valve body are tubulose, pipe
Outside matched with the internal thread of union nut equipped with external screw thread, union nut will take over (flange) and be fixed in inlet and outlet.
As shown, rotation hand wheel band ovable valve stem, promotes or declines valve rod and flap, valve stream thus may be implemented
The on or off for measuring channel, to carry out the control to pipeline.
The foregoing is merely a kind of embodiments of the present invention, are not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc. made by within refreshing and principle, to be included within protection scope of the present invention.
Claims (8)
1. a kind of bellows instrument valve, characterized in that including valve body, flap, valve rod, valve seat, bellows, pressure ring, valve deck, sealing
Packing seat, jam nut, stuffing box, clamp nut, handwheel；Valve body is equipped with inlet and outlet, imports and exports on an axis, valve body
The center of enterprising outlet flow is equipped with valve seat, and valve seat is located on inlet and outlet channel, and valve rod, valve rod are connect with the matched flap of valve seat
Flap is driven to open and close the keying of corresponding valve on valve seat, the connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into flap
Only in hole, corrugated stainless steel tubing is sleeved on valve rod, and bellows lower end is welded on the lower end of valve rod；It turns over valve rod upper end bellows upper end
While being fixed on the circumference of pressure ring, pressure ring is fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；
Valve rod passes through pressure ring centre bore and upper cover center, valve stem tip to be equipped with the handwheel of bonding, valve rod is surrounded above upper cover inner corrugated pipe
Position be equipped with stuffing box, stuffing box includes Packing seat, filler, packing press ring.
2. bellows instrument valve according to claim 1, characterized in that be equipped with clamp nut, the longitudinal section of clamp nut
It is door shape, upper cover top is equipped with the matched screw thread of clamp nut screw thread, and clamp nut is used to packing press ring being fixed on upper cover
On.
3. bellows instrument valve according to claim 1, characterized in that be equipped with jam nut, the longitudinal section of jam nut
It is door shape, valve body is equipped with the matched screw thread of jam nut screw thread, for upper cover to be fixed on valve body.
4. bellows instrument valve according to claim 1, characterized in that the valve seat on inlet and outlet channel is a taper hole,
Flap is taper, and taper flap is inserted into taper hole.
5. bellows instrument valve according to claim 1, characterized in that the position for accommodating corrugated stainless steel tubing on valve body is
One tubular.
6. bellows instrument valve according to claim 1, characterized in that the inlet and outlet of valve body, which are equipped with, takes over, take over into
The connection version of outlet is set to there is flange, and sealing ring is equipped between importing and exporting and taking over, and is equipped with union nut, and the vertical of union nut cuts
Face is door shape, and the inlet and outlet of valve body are tubulose, and the outside of pipe is matched equipped with external screw thread with the internal thread of union nut, take over spiral shell
Mother, which will take over, to be fixed in inlet and outlet.
7. bellows instrument valve according to claim 1, characterized in that be equipped with clamp nut, the longitudinal section of clamp nut
It is door shape, upper cover top is equipped with the matched screw thread of clamp nut screw thread, and packing press ring is fixed on upper lid by clamp nut.
8. bellows instrument valve according to claim 1, characterized in that be equipped with jam nut, the longitudinal section of jam nut
It is door shape, valve body is equipped with the matched screw thread of jam nut screw thread, and upper cover is fixed on valve body by jam nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810538174.1A CN108591484A (en) | 2018-05-30 | 2018-05-30 | A kind of multi-sealed bellows instrument valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810538174.1A CN108591484A (en) | 2018-05-30 | 2018-05-30 | A kind of multi-sealed bellows instrument valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591484A true CN108591484A (en) | 2018-09-28 |
Family
ID=63629764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810538174.1A Withdrawn CN108591484A (en) | 2018-05-30 | 2018-05-30 | A kind of multi-sealed bellows instrument valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591484A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681683A (en) * | 2019-01-09 | 2019-04-26 | 中国原子能科学研究院 | A kind of flexible graphite sealing injection device for sodium-cooled fast reactor |
| CN110594501A (en) * | 2019-09-23 | 2019-12-20 | 宁波天生密封件有限公司 | Thread clamping and pressing type pipe fitting structure and using method thereof |
-
2018
- 2018-05-30 CN CN201810538174.1A patent/CN108591484A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681683A (en) * | 2019-01-09 | 2019-04-26 | 中国原子能科学研究院 | A kind of flexible graphite sealing injection device for sodium-cooled fast reactor |
| CN109681683B (en) * | 2019-01-09 | 2023-09-29 | 中国原子能科学研究院 | Flexible graphite sealing injection device for sodium-cooled fast reactor |
| CN110594501A (en) * | 2019-09-23 | 2019-12-20 | 宁波天生密封件有限公司 | Thread clamping and pressing type pipe fitting structure and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103244696A (en) | External-pressure type bellows globe valve with non-rotating valve rod | |
| CN108591484A (en) | A kind of multi-sealed bellows instrument valve | |
| CN203442144U (en) | External-pressure type bellows stop valve with non-rotating valve rod | |
| CN105003655A (en) | High-pressure connecting rod type bellows globe valve | |
| CN108775406A (en) | High-performance nano coating corrugated tube valve special for chlorine | |
| CN203857059U (en) | Novel stop valve | |
| CN208804229U (en) | A kind of multi-sealed bellows instrument valve | |
| CN202118294U (en) | High-pressure hard seal ball valve | |
| CN208670159U (en) | A kind of three valve of filtering cut-off non-return | |
| CN208565571U (en) | A kind of multi-sealed bellows stop valve | |
| CN205401791U (en) | Sealed ball valve | |
| CN108426038A (en) | A kind of high-pressure resistant corrugated pipe shut-off valve | |
| CN104791505A (en) | Flexible anticorrosion stainless steel casting valve | |
| CN108533761A (en) | A kind of multi-sealed bellows stop valve | |
| CN204828680U (en) | High -pressure connecting rod formula bellows stop valve | |
| CN203248751U (en) | Anti-leakage butterfly valve | |
| CN208885983U (en) | A kind of high-pressure resistant corrugated pipe shut-off valve | |
| CN208670090U (en) | A kind of filtering cut-off is unified into valve | |
| CN206816949U (en) | The valve group of HTHP bellows five | |
| CN206592638U (en) | A kind of new butterfly valve | |
| CN204372223U (en) | A kind of lining fluorine membrane valve protecting diaphragm and lost efficacy | |
| CN209540118U (en) | Check-valves is opened in a kind of rotation of axis hole packing seal | |
| CN108181050A (en) | A kind of test splice tooling for fuel tank sealing performance | |
| CN2927018Y (en) | Valve-lever sealing structure of pressure gage valve | |
| CN205423861U (en) | Welding butterfly 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180928 |
|
| WW01 | Invention patent application withdrawn after publication |