CN107461503A - A kind of special regulating valve of HTHP - Google Patents
A kind of special regulating valve of HTHP Download PDFInfo
- Publication number
- CN107461503A CN107461503A CN201610385373.4A CN201610385373A CN107461503A CN 107461503 A CN107461503 A CN 107461503A CN 201610385373 A CN201610385373 A CN 201610385373A CN 107461503 A CN107461503 A CN 107461503A
- Authority
- CN
- China
- Prior art keywords
- valve
- bonnet
- cage
- plug
- hthp
- 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
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 19
- 239000010439 graphite Substances 0.000 claims abstract description 19
- 238000012856 packing Methods 0.000 claims abstract description 14
- 210000004907 gland Anatomy 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 14
- 238000009825 accumulation Methods 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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
- 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
-
- 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
-
- 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
-
- 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
- F16K27/12—Covers for housings
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
Abstract
The invention discloses a kind of special regulating valve of HTHP, and it includes valve body, bonnet, valve seat, valve cage, valve plug and valve rod, is provided with bonnet above the valve body, a built-in space is formed between bonnet and valve body, valve seat is provided with the bottom of built-in space；Valve cage is provided between valve seat and bonnet, valve cage includes the upper valve cage from top to bottom set and lower valve cage, upper seal is provided between upper valve cage and lower valve cage；Valve plug is provided with inside valve cage, valve plug is provided with lower seal on valve seat between valve plug and valve seat；Valve rod is provided with inside valve plug, is preposition positioning and locking threaded connection between valve plug and valve rod, valve rod top is arranged in bonnet central, graphite packing is provided between valve rod and bonnet, and the top of bonnet is additionally provided with gland.The special regulating valve of HTHP of the present invention can sealing effectively at a high temperature of poppet, bear high pressure, reliability and versatility；Can be extensively using in the HTHP regulation occasion of various automations.
Description
Technical field
The present invention relates to automatic control technology field, more particularly to the good seal performance of a kind of controllable flow rate, temperature, pressure, reliability are high, the long-lived special regulating valve of HTHP.
Background technology
In industrial automatic control, often need to use regulating valve to control flow, temperature, pressure.Existing regulating valve, as shown in Figure 1, it includes valve body to its structure（01）, bonnet（02）, valve seat（03）, valve element（04）, sleeve（05）, balanced seal ring（06）, valve rod（07）, filler group（08）, gland（09）, dust ring（010）.This class formation has the following disadvantages：
1st, valve seat（03）Sealed with being used at seal spool at two, be metal sealing at one, another place is soft seal, and because soft seal is sealed from plastic products, its poor flexibility, not resistance to high temperature, maximum operation (service) temperature are 200 degree；
2nd, valve element（04）Inwall is too thin, when running into high temperature, the easy high temperature deformation of heat expansion principle, and easily with producing leakage, easy and sleeve at the valve seat metal sealing of bottom（05）Locking, influence performance；
3rd, balanced seal ring（06）Material functional plastics, high temperature and particle operating mode are not overcome equally；
4th, valve rod（07）And valve element（04）After connection screw thread, Type of Welding is carried out, can not be changed online, plant maintenance is cumbersome；
5th, filler group（08）Combine short, seal that relative distance is relative to be shortened, it farther out, guide effect is not had to valve element apart from valve element；
6th, gland（09）And bonnet（02）Using threaded form, easily killed under worst hot case, do not have secondary compression sealing function.
In a word, for the conventional regulating valve of current ambient temperature, due to standardization, modularization deficiency, its temperature in use is low, pressure difference is low；Can not be solved under the high operating mode of temperature plus existing regulating valve, the problem of its sealing effectiveness is poor, pressure difference is low, frictional force is big, and its ambient adaptability is not strong, reliability is low, is not durable.
To sum up, need that one kind can high temperature high voltage resistant, ambient adaptability be strong, good seal performance, reliability are high, long-lived regulating valve at present, to meet production and living demand.
The content of the invention
The present invention be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of special regulating valve of HTHP, its is simple in construction, high temperature and high pressure environment seal performance energy is good, reliability is high, durable in use.
To solve problems of the prior art, the concrete technical scheme that the present invention uses is：
A kind of special regulating valve of HTHP, it includes valve body, bonnet, valve seat, valve cage, valve plug and valve rod, it is characterised in that：Bonnet is provided with above the valve body, a built-in space is formed between bonnet and valve body, valve seat is provided with the bottom of built-in space；Valve cage is provided between the valve seat and bonnet, the valve cage includes the upper valve cage from top to bottom set and lower valve cage, upper seal is provided between the upper valve cage and lower valve cage；Valve plug is provided with inside the valve cage, valve plug is provided with lower seal on valve seat between valve plug and valve seat；Valve rod is provided with inside the valve plug, is preposition positioning and locking threaded connection between the valve plug and valve rod, the valve rod top is arranged in bonnet central, graphite packing is provided between the valve rod and bonnet, and the top of the bonnet is additionally provided with gland.
Preferable scheme, it is that symmetrical bolt presses mode connects between the bonnet and valve body.
Further preferred scheme, the upper seal and lower seal are the metal spring accumulation of energy sealing ring that High-temperature resistant alloy material makes.
Scheme still more preferably, the metal spring accumulation of energy sealing ring are provided with the inner lining spring made using alloy material, and the inner lining spring surface is provided with scuff-resistant coating.
Scheme still more preferably again, it is that symmetrical bolt presses mode connects between the bonnet and gland.
The valve seat is standardization, modularized design, is provided with a groove among it, and the lower seal realizes the sealing of valve plug outer rim in groove by lower seal between the valve seat and valve plug.
The inner ring of the valve seat and the bottom of valve plug are equipped with a pair of inclined-planes to contact with each other, realize the sealing of valve plug inner edge between valve seat and valve plug by the inclined-plane.
The middle part of the graphite packing is provided with the support set for being used for compensator or trimmer pressure and reducing friction, and the graphite packing is located at the upper and lower ends of support set.The graphite packing is highdensity 304 winding graphite.
The lower valve cage is provided with multiple equally distributed metering orifices.
By using such scheme, compared with prior art, it has technical effect that the special regulating valve of a kind of HTHP of the invention：
1st, dismantle using compressing from the snap-in structure of centering between valve body and bonnet and be not required to frock, be easy to field maintenance and replacing；And valve seat is using the versatility that product can be lifted after standardization, modularized design.
2nd, valve plug valve rod is threadedly coupled using preposition positioning and locking, and valve rod intensity is high, is several times of traditional regulation valve, not flexible, severe operating mode preferably.
3rd, valve plug and valve cage are suitable for different operating modes; with longer service life; higher anti-cavitation and noise-reducing performance; the needs that valve cage is just applicable to different operating modes only need to be changed; and valve cage not only plays the function that power transmission compresses valve seat; it can also be effectively protected valve body and exempt from cavitation erosion, the destruction of air, and play the role of to reduce noise.
4th, stuffing-box is safer, more reliable using compression Seal Design；Stuffing-box system increases support set, can effectively reduce frictional force, prevent stuffing-box locking, and graphite packing also has good positioning and guiding to act on by being sealed with valve stem contacts to valve plug；Sealing effectively can overcome high temperature to influence using highdensity 304 winding graphite at valve rod.
5th, using Dual-sealing balance principle, it is that valve plug and valve seat inclined-plane add metal spring accumulation of energy sealing ring to be combined sealing at one, another place is sealed by valve cage metal spring accumulation of energy sealing ring, regulation valve insertion balance type structure is set to bear bigger pressure difference, metal spring accumulation of energy sealing ring selects special resistant to elevated temperatures alloy material, normal sealing effectiveness can be kept in the range of 920 degree of temperature, and same angle seals are used between valve plug and valve seat, permanent service life and sealing effectiveness can be kept.
6th, symmetrical bolt presses mode is used between gland and bonnet, it is therefore prevented that the locking to bonnet.
Brief description of the drawings
Fig. 1 is the overall structure diagram of regulating valve in the prior art；
Fig. 2 is a kind of overall structure diagram of the special regulating valve of HTHP of the present invention；
Fig. 3 is the A portions enlarged drawing in a kind of overall structure diagram of the special regulating valve of HTHP of the present invention；
Fig. 4 is the B portions enlarged drawing in a kind of overall structure diagram of the special regulating valve of HTHP of the present invention；
Fig. 5 is a kind of lower valve cage metering orifice layout viewing of the special regulating valve of HTHP of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to instantiation and referring to the drawings, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring idea of the invention.
In industrial automatic control, governor valve control flow, temperature, pressure need to be often used；Poppet of the present invention sealing in high temperature environments, bear high pressure, flow regulating ratio；And because high-temperature high-pressure regulating valve uses Dual-sealing balance principle, at one, valve bottom is that valve plug and valve seat inclined-plane add metal spring accumulation of energy sealing ring to be combined sealing, and another place passes through valve cage metal spring accumulation of energy sealing ring and sealed；Metal spring accumulation of energy sealing ring selects special resistant to elevated temperatures alloy material, can keep normal sealing effectiveness in the range of 920 degree of temperature.Have on valve cage and precisely uniformly adjust metering orifice, medium prepares control valve characteristic and noise-reducing effect by metering orifice.Sealing can overcome high temperature using highdensity 304 winding graphite at valve rod.
As shown in Figures 2 to 5, the special regulating valve of a kind of HTHP, including valve body 1, bonnet 2, valve seat 3, valve cage 4, valve plug 5 and valve rod 6.
The top of the valve body 1 is provided with bonnet 2, is that symmetrical bolt presses mode connects between the bonnet 2 and valve body 1, and the top of valve body 1 is provided with groove, and boss is provided with below bonnet 2, does not need frock by being caught in mode from centering, during dismounting, is easy to field maintenance and replacing.
A built-in space is formed between bonnet 2 and valve body 1, valve seat 3 is provided with the bottom of built-in space；Valve cage 4 is provided between the valve seat 3 and bonnet 2, the valve cage 4 includes the upper valve cage 41 from top to bottom set and lower valve cage 42, the perisporium of the lower valve cage 42 is provided with multiple equally distributed metering orifices 13, and upper seal 7 is provided between the upper valve cage 41 and lower valve cage 42.
The inside of valve cage 4 is provided with valve plug 5, valve plug 5 is on valve seat 3, and lower seal 8 is provided between valve plug 5 and valve seat 3, the upper seal 7 and lower seal 8 are the metal spring accumulation of energy sealing ring that High-temperature resistant alloy material makes, the metal spring accumulation of energy sealing ring is provided with the inner lining spring made using alloy material, and the inner lining spring surface is provided with scuff-resistant coating.
The inside of valve plug 5 is provided with valve rod 6, it is preposition positioning and locking threaded connection between the valve plug 5 and valve rod 6, the top of valve rod 6 is arranged in the center of bonnet 2, graphite packing 9 is provided between the valve rod 6 and bonnet 2, the middle part of the graphite packing 9 is provided with the support set 10 for being used for compensator or trimmer pressure and reducing friction, the graphite packing 9 is located at the upper and lower ends of support set 10, and the graphite packing 9 is highdensity 304 winding graphite.
The top of the bonnet 2 is additionally provided with gland 11, is that symmetrical bolt presses mode connects between the bonnet 2 and gland 11.
The valve seat 3 is standardization, modularized design, is provided with a groove among it, and the lower seal 8 realizes the sealing of valve plug outer rim in groove by lower seal 8 between the valve seat 3 and valve plug 5.The inner ring of the valve seat 3 and the bottom of valve plug 5 are equipped with a pair of inclined-planes 12 to contact with each other, realize the sealing of valve plug inner edge between valve seat 3 and valve plug 5 by the inclined-plane 12.
The valve seat of the special regulating valve of HTHP of the present invention is dismantled using compressing from the snap-in structure of centering and is not required to frock, is easy to field maintenance and replacing；Using the versatility that product can be lifted after standardization, modularized design；Valve plug valve rod is threadedly coupled using preposition positioning and locking；Super thick valve rod intensity is several times of traditional regulation valve, not flexible, severe operating mode preferably；Valve plug and valve cage design are suitable for different operating modes, have longer service life, higher anti-cavitation and noise-reducing performance, only need to change the needs that valve cage is just applicable to different operating modes；Stuffing-box is safer, more reliable using compression Seal Design；Stuffing-box system increases support set, can effectively reduce frictional force, prevent stuffing-box locking.Valve plug, sealing surface of seat use same angle seals, can keep permanent service life and sealing effectiveness.Valve cage not only plays the function that power transmission compresses valve seat, and it can also be effectively protected valve body and exempt from cavitation erosion, the destruction of air, and plays the role of to reduce noise.
The foregoing is merely illustrative of the preferred embodiments of the present invention, the protection domain being not intended to limit the invention, and within the spirit and principles of the invention, any modification for being made, equivalent substitution, is all contained within protection scope of the present invention.
Claims (10)
1. a kind of special regulating valve of HTHP, it includes valve body, bonnet, valve seat, valve cage, valve plug and valve rod, it is characterised in that：Bonnet is provided with above the valve body, a built-in space is formed between bonnet and valve body, valve seat is provided with the bottom of built-in space；Valve cage is provided between the valve seat and bonnet, the valve cage includes the upper valve cage from top to bottom set and lower valve cage, upper seal is provided between the upper valve cage and lower valve cage；Valve plug is provided with inside the valve cage, valve plug is provided with lower seal on valve seat between valve plug and valve seat；Valve rod is provided with inside the valve plug, is preposition positioning and locking threaded connection between the valve plug and valve rod, the valve rod top is arranged in bonnet central, graphite packing is provided between the valve rod and bonnet, and the top of the bonnet is additionally provided with gland.
A kind of 2. special regulating valve of HTHP according to claim 1, it is characterised in that：It is that symmetrical bolt presses mode connects between the bonnet and valve body.
A kind of 3. special regulating valve of HTHP according to claim 1, it is characterised in that：The upper seal and lower seal are the metal spring accumulation of energy sealing ring that High-temperature resistant alloy material makes.
A kind of 4. special regulating valve of HTHP according to claim 3, it is characterised in that：The metal spring accumulation of energy sealing ring is provided with the inner lining spring made using alloy material, and the inner lining spring surface is provided with scuff-resistant coating.
A kind of 5. special regulating valve of HTHP according to claim 1, it is characterised in that：It is that symmetrical bolt presses mode connects between the bonnet and gland.
A kind of 6. special regulating valve of HTHP according to claim 1, it is characterised in that：A groove is provided among the valve seat, the lower seal realizes the sealing of valve plug outer rim in groove by lower seal between the valve seat and valve plug.
A kind of 7. special regulating valve of HTHP according to claim 1, it is characterised in that：The inner ring of the valve seat and the bottom of valve plug are equipped with a pair of inclined-planes to contact with each other, realize the sealing of valve plug inner edge between valve seat and valve plug by the inclined-plane.
A kind of 8. special regulating valve of HTHP according to claim 1, it is characterised in that：The middle part of the graphite packing is provided with the support set for being used for compensator or trimmer pressure and reducing friction, and the graphite packing is located at the upper and lower ends of support set.
A kind of 9. special regulating valve of HTHP according to claim 1, it is characterised in that：The graphite packing is highdensity 304 winding graphite.
A kind of 10. special regulating valve of HTHP according to claim 1, it is characterised in that：The lower valve cage is provided with multiple equally distributed metering orifices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385373.4A CN107461503A (en) | 2016-06-03 | 2016-06-03 | A kind of special regulating valve of HTHP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385373.4A CN107461503A (en) | 2016-06-03 | 2016-06-03 | A kind of special regulating valve of HTHP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107461503A true CN107461503A (en) | 2017-12-12 |
Family
ID=60545463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610385373.4A Pending CN107461503A (en) | 2016-06-03 | 2016-06-03 | A kind of special regulating valve of HTHP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107461503A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469681A (en) * | 2019-09-17 | 2019-11-19 | 上海兰宝环保科技有限公司 | A kind of RTO leakproof switching valve |
| CN110657248A (en) * | 2018-06-28 | 2020-01-07 | 费希尔控制产品国际有限公司 | Valve trim apparatus for control valve |
| CN112923072A (en) * | 2021-02-02 | 2021-06-08 | 山东中力高压阀门股份有限公司 | Balanced sleeve cut-off valve |
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| CN202327264U (en) * | 2011-09-15 | 2012-07-11 | 西姆流体技术（上海）有限公司 | Adjusting valve with C-shaped sealing ring |
| CN203258146U (en) * | 2013-05-24 | 2013-10-30 | 上海铂嘉控制阀门有限公司 | Sleeve adjusting valve |
| CN203272818U (en) * | 2013-05-07 | 2013-11-06 | 航天长征化学工程股份有限公司 | Balanced cage type single-seat adjusting valve |
| CN203627966U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Cage type double-base adjusting valve with metal elastic C-shaped sealing ring component |
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| US20150108378A1 (en) * | 2013-10-18 | 2015-04-23 | Fisher Controls International Llc | Fluid flow device that provides an improved seal by exploiting differential thermal expansion |
| CN105257886A (en) * | 2015-11-13 | 2016-01-20 | 航天长征化学工程股份有限公司 | Corrosion-resistant and scouring-resistant regulating valve |
| CN205663900U (en) * | 2016-06-03 | 2016-10-26 | 上海范雨实业有限公司 | Special governing valve of high temperature high pressure |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202327264U (en) * | 2011-09-15 | 2012-07-11 | 西姆流体技术（上海）有限公司 | Adjusting valve with C-shaped sealing ring |
| CN102330842A (en) * | 2011-10-22 | 2012-01-25 | 无锡智能自控工程有限公司 | Valve rod sealing structure for cryogenic butterfly valve under ultralow temperature working condition |
| US20140264135A1 (en) * | 2013-03-14 | 2014-09-18 | Fisher Controls International Llc | Valve seat apparatus for use with fluid valves |
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| US20150108378A1 (en) * | 2013-10-18 | 2015-04-23 | Fisher Controls International Llc | Fluid flow device that provides an improved seal by exploiting differential thermal expansion |
| CN203627966U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Cage type double-base adjusting valve with metal elastic C-shaped sealing ring component |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657248A (en) * | 2018-06-28 | 2020-01-07 | 费希尔控制产品国际有限公司 | Valve trim apparatus for control valve |
| CN110657248B (en) * | 2018-06-28 | 2023-12-26 | 费希尔控制产品国际有限公司 | Valve trim apparatus for a control valve |
| CN110469681A (en) * | 2019-09-17 | 2019-11-19 | 上海兰宝环保科技有限公司 | A kind of RTO leakproof switching valve |
| CN112923072A (en) * | 2021-02-02 | 2021-06-08 | 山东中力高压阀门股份有限公司 | Balanced sleeve cut-off valve |
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