SE1930340A1 - A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valve - Google Patents
A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valveInfo
- Publication number
- SE1930340A1 SE1930340A1 SE1930340A SE1930340A SE1930340A1 SE 1930340 A1 SE1930340 A1 SE 1930340A1 SE 1930340 A SE1930340 A SE 1930340A SE 1930340 A SE1930340 A SE 1930340A SE 1930340 A1 SE1930340 A1 SE 1930340A1
- Authority
- SE
- Sweden
- Prior art keywords
- valve
- seat
- bypass valve
- steam
- gasket
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000001351 cycling effect Effects 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004326 stimulated echo acquisition mode for imaging 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
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K1/42—Valve seats
- F16K1/427—Attachment of the seat to the housing by one or more additional fixing elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
-
- 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
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
-
- 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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
-
- 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
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
-
- 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
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
- F16K47/14—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths the throttling member being a perforated membrane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
- F22G5/123—Water injection apparatus
- F22G5/126—Water injection apparatus in combination with steam-pressure reducing valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a bypass valve (10) for a steam turbine with an axially extending valve body (16) having a steam inlet (12) and a steam outlet (14), and a cage (18) with perforations for allowing steam to enter the interior of the valve body (16). A plug (28) is reciprocally movable in the interior of the valve body (16). The valve further comprises a detachable, substantially annular valve seat (34), a compression ring (22) arranged so that it rests against an internal lip (24) provided in the valve body (16) and an annular seat gasket (35) made in compressible material. The gasket (35) is arranged between the valve seat (34) and the compression ring (22), and the valve seat (34) is rendered immobile between the cylindrical cage (18) and the seat gasket (35). The invention also relates to a replacement kit for a bypass valve.
Description
Case P203_SE A BYPASS VALVE FOR A STEAM TURBINE BEING PART OF A PQWER PLANT AND A REPLAQEIVIENT KIT FQR A STEAIVITURBINE BYPASS VALVE FIELD OF THE INVENTION On a general level, the invention concerns a bypass valve for use in a power plant comprising a steam turbine.
BACKGROUND OF THE INVENTION ln a steam-based power plant, a bypass valve typicallyroutes the working medium around the steam turbine. Workingmedium of such plants is normally superheated steam, i.e. ahigh-temperature, high-pressure vapor generated by further heating of the steam obtained by boiling water.
When in operation, the turbine bypass valve must reducepressure as well as temperature of the superheated steam.Typically, steam pressure at the valve inlet is about 200 bar andits temperature may be up to 600°C. Pressure reduction isnormally accomplished by a multi-stage trim in the interior of avalve body. lf desired, temperature reduction may be achievedthrough a subsequent controlled injection of water into the steam flow - a process called desuperheating.
A turbine bypass valve permits operation of the plantboiler independently from the steam turbine during start-up,commissioning and shut down. Accordingly, these valves are required to handle severe process conditions. ln a related context, bypass valves are very useful in cycling power plants.ln these, valve components are typically exposed to significantstress cycles several times a day. Here, plant cycling may bedefined as changing the output of a power plant, for instanceduring ramp-up or ramp-down. The harsh operating conditionscombined with frequent plant cycling entail that it is difficult toprovide bypass valve components that are reliable over the long-term.
One such component is a valve seat - a ring-shaped partof a valve body against which a sealing element, typically amoving valve plug, rests when the valve is closed. Whenassembling the valve, the valve seat is traditionally joined to therest of the valve body by means of welding. Here, the valve seatis typically made in a more resistant steel alloy than the rest ofthe valve body. As is known in the art, a welding process thatjoins two rather different steel alloys normally presents numerous challenges.
Moreover, heat generated during the welding processcould structurally damage either steel alloy and cause reducedmechanical stability and/or degraded heat resistance of the entire bypass valve. ln a related context, welding of these advanced steelalloys is subject to rigorous standards. The compliance withwelding procedure according to any such standard entails amore complex production process and results in reduced production rate.
Furthermore, exposure to wet steam and residual particlestypically leads to erosion of parts of the valve trim. lf erosiontakes place at a sealing surface of the valve trim, such as valveseat and valve plug, it might result in undesirable steam Ieakage. This is particularly common in the context ofsupercritical pressure drop, i.e. when the steam and the residualparticles it carries have very high velocity, and/or when the valve is operating with a small opening of the valve plug.
On the account of above-discussed severe conditions inthe valve interior, steam leakage frequently occurs at the valveseat of the turbine bypass valve such that the steam passesacross the valve seat although the valve plug is in closedposition. Once this leakage becomes substantial it becomesnecessary to replace the valve seat. The valve seat replacementis a complex and time-consuming process that involves use ofdedicated cutting tools in order to detach the valve seat fromthe rest of the valve body.
On the above background, one objective of the inventionat hand is to at least alleviate above-identified and otherdrawbacks associated with the current art.
SUMMARY OF THE INVENTION The above stated objective is achieved by means of abypass valve which includes the features defined in theindependent claim 1. Particular embodiments of the bypassvalve are defined in the dependent claims 2 to 9. The inventionfurther encompasses a replacement kit for a steam turbine bypass valve in accordance with claim 10.
By providing an easily detachable valve seat, it becomespossible to execute a rapid and simplified valve seatreplacement. Accordingly, the down-time of the bypass valve is greatly reduced. ln a related context, the valve seat replacement may be carried out as soon as a valve Ieakage is detected.
Further, the bypass valve in accordance with the presentinvention obviates the need for welding when installing a bypassvalve in a steam-driven power plant. As discussed above, thisentails significant benefits, e.g. preserved structural and thermal properties of the used steel alloys.
Finally, for any individual bypass valve, the plant ownermay consider successive valve seat replacements as it becomeseconomically viable to repeatedly replace the valve seat andthereto associated components instead of exchanging the entirebypass valve. Obviously, this results in significant positive impact on the economy of the power plant.
The claimed replacement kit further reduces costs anddown-time as it only requires replacement of certain components of the bypass valve.
BRIEF DESCRIPTION OF THE DRAWINGS The objects, advantages and features of the invention willappear more clearly in the following description made withreference to the non-limiting embodiments, illustrated by the drawings, in which: Fig. 1 shows a perspective view of a bypass valveaccording to one embodiment of the present invention. A portionof a valve body is removed so that a valve trim can appear in greater detail.
Fig. 2 is a longitudinal, cross-sectional view of the bypass valve shown in Fig. 1.
Fig. 3 is an exploded view of the bypass valve shown inFig. 1.
Fig. 4 illustrates use of a coating of wear resistant material provided on a valve seat respectively on a valve plug.
DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described more fullyhereinafter with reference to the accompanying drawings, inwhich preferred embodiments are shown. This invention may,however, be embodied in many different forms and should notbe construed as limited to the embodiments set forth herein;rather, these embodiments are provided so that this disclosurewill be thorough and complete, and will fully convey the scope ofthe invention to those skilled in the art. ln the drawings, like reference signs refer to like elements.
For the purposes of this application, terms like ”axial”,”radial” and "longitudinal" are in reference to the different directions of the valve body.
Fig. 1 shows a perspective view of a bypass valve 10according to one embodiment of the present invention. A portionof a valve body 16 is removed so that a valve trim can appear ingreater detail. A substantially axially extending valve body 16 isshown. The valve body 16 is substantially cylindrically-shapedand provided with a steam inlet 12 used for connection to asteam supply (not shown) and a steam outlet 14. A perforated,cylindrical cage 18 is arranged in vicinity of the steam inlet 12.A valve plug (not visible in Fig. 1) is enclosed by the cage 18.One of the purposes of the cage 18 is to hold the plug in place.
A valve seat 34 is sandwiched between the cage 18 and a seat gasket 35. When the valve 10 is open, i.e. steam is flowingthrough the valve trim, the valve plug isn't abutting the valveseat 34. Steam pressure reduction takes place across theperforated cage 18. Accordingly, the steam having reducedpressure passes across the valve seat 34 and exits the valve 10via the steam outlet 14. A hereby conferred benefit is that asignificant pressure drop is taken at a distance with respect tothe sealing surfaces of the valve seat. Accordingly, the sealing surfaces are protected from prohibitively high steam pressures. ln certain embodiments, the bypass valve furthercomprises spray nozzles (not shown) for injecting cooling waterinto the steam downstream of the steam outlet. The furthercomponents and operation of the bypass valve 10 will be discussed in greater detail in connection with Figs. 2 and 3.
Fig. 2 is a longitudinal cross-sectional view of the bypassvalve 10 shown in Fig. 1. With reference to Fig. 2, a plug 28,reciprocally movable in the interior of the valve body 16, is alsoshown. The bypass valve 10 is closed since the plug 28 abutsagainst a valve seat 34. The valve body 16 and the plug 28 aretypically manufactured in hardened stainless steel. The plug 28is firmly coupled to a valve stem 29. The valve stem 29 movesthe plug 28. The movement of the valve stem 29 is controlled bythe actuator (not shown) that may be either hydraulic, pneumatic or electric.
Fig. 3 is an exploded view of the assembled bypass valve10 shown in Figs. 1 and 2. ln a lower portion of Fig. 3, acompression ring 22, typically made in steel, is arranged so thatit rests against an internal lip 24 provided in the valve body 16.An annular seat gasket 35 made in compressible material isarranged between the compression ring 22 and a valve seat 34.
The gasket 35 prevents steam Ieakage. The substantiallyannular valve seat 34 is detachable. The seat 34 is normallymade in hardened Stainless steel. lt is further shown a fixedlyarranged, cylindrical cage 18 provided with a plurality ofperforations for allowing steam to enter the interior of the valvebody 16. The valve seat 34 is rendered immobile between thecylindrical cage 18 and the seat gasket 35. The immobilizationof the valve seat 34 is achieved by a clamping force exerted bythe cage 18. ln one embodiment, the seat gasket material isgraphite. ln consequence of the clamping force, the graphitegasket 35 is compressed. ln the compressed state, the graphitedensity doesn't exceed 1,5 g/cubic cm. ln the same context, theheight of the graphite gasket 35 is reduced by 1,5 mm due tocompression forces and the pressure on the gasket side facingthe cage is 40 MPa.
By providing an easily detachable valve seat 34, itbecomes possible to execute a rapid and simplified valve seatreplacement. Accordingly, the down-time of the bypass valve 10 is greatly reduced.
Further, the bypass valve 10 in accordance with thepresent invention obviates the need for welding duringinstallation. This entails significant benefits, e.g. preserved structural and thermal properties of the used steel alloys.
The valve further comprises a bonnet 20 and theretoassociated bonnet gaskets 21. The bonnet 20 is attached to thevalve body 16 by means of bolts 23. A spacing element 39 isalso shown. Furthermore, a segment ring 25 that keeps thecomponents located below biased and in place may be seen. Acover plate 33 is also shown. The bypass valve 10 furthercomprises a stem guide 41 for guiding the valve stem (not shown in Fig. 3) and stem packing rings 19. A gland 27 preventswater Ieakage. The gland 27 is kept in compression by means of a gland yoke 29 and stud bolts 31. ln an embodiment (not shown), a lowermost section of thecage is devoid of perforations. Accordingly, a deadband isprovided and initial opening of the valve plug doesn't result insteam flow. Consequently, the plug is already significantly openwhen the steam passes across the cage via the perforations. Asa result, the steam entering the interior of the valve body hasreduced velocity and may cause less damage to the valve trim. ln another embodiment of the present invention, areplacement kit for a bypass valve is disclosed. Thereplacement kit comprises a substantially axially extendingvalve body 16, a fixedly arranged, cylindrical cage 18 providedwith a plurality of perforations for allowing steam to enter theinterior of the valve body 16, a plug 28, reciprocally movablewithin the interior of the valve body, a detachable, substantiallyannular valve seat 34, a compression ring 22 being arranged sothat it rests against an internal lip 24 provided in the valve body10, and an annular seat gasket 35 made in compressiblematerial and being arranged between the valve seat 34 and thecompression ring 22, wherein the valve seat 34 is renderedimmobile between the cylindrical cage 18 and the seat gasket35. ln another embodiment of the present invention, havingonly a few structural differences compared to the bypass valveshown in Figs. 1-3, the plug 28 is at least partially hollow andits outer wall is provided with a plurality of perforations along atleast 30 % of its height H. ln this embodiment, the pressuredrop is also taken at the perforated plug, i.e. at a distance with respect to the interface of the valve seat and the valve plug.Advantageously, the sealing surfaces are protected from prohibitively high steam pressures.
Fig. 4 illustrates use of a coating of wear resistantmaterial provided on a valve seat 34 respectively on a valveplug 28. Here, the plug 28 is at least partially hollow and itsouter wall is provided with a plurality of perforations. A firstcoating 13 of wear resistant material is arranged on the valveplug 28. A second coating 15 of wear resistant material isarranged on the valve seat 34 enclosed by a valve body 16.When the plug 28 abuts against the valve seat 34, the valve isclosed and the first and the second coatings are in contact. Byway of example, the wear resistant material is a cobalt-basedalloy. The coating contributes in improving the resistance of thevalve seat to particulate and water drops carried by the steam. ln the drawings and specification, there have beendisclosed typical preferred embodiments of the invention and,although specific terms are employed, they are used in ageneric and descriptive sense only and not for purposes oflimitation, the scope of the invention being set forth in the following claims.
Claims (10)
1. A bypass valve (10) for a steam turbine, the bypass valve (10) comprising: - a substantially axially extending valve body (16) having a steam inlet (12) and a steam outlet (14), - a fixedly arranged, cylindrical cage (18) provided witha plurality of perforations for allowing steam to enter the interiorof the valve body (16), - a plug (28), reciprocally movable in the interior of thevalve body (16), - a detachable, substantially annular valve seat (34), - a compression ring (22) being arranged so that itrests against an internal lip (24) provided in the valve body (16), - an annular seat gasket (35) made in compressiblematerial, the gasket (35) being arranged between the valve seat(34) and the compression ring (22), wherein - the valve seat (34) is rendered immobile between thecylindrical cage (18) and the seat gasket (35).
2. A bypass valve (10) according to claim 1, wherein the seat gasket (35) material is graphite.
3. A bypass valve (10) according to claim 2, wherein, inthe assembled state of the bypass valve (10), the graphite ofthe seat gasket (35) is compressed so that its density doesn't exceed 1,5 g/cubic cm. ll
4. A bypass valve (10) according to any of the precedingclaims, wherein the immobilization of the valve seat (34) is achieved by a clamping force exerted by the cage (18).
5. A bypass valve (10) according to any of the precedingclaims, wherein a first coating (13) of wear resistant material isarranged on the valve plug (28) and a second coating (15) ofwear resistant material is arranged on the valve seat (34) and,when the plug (28) abuts against the valve seat (34), the first (13) and the second (15) coatings are in contact.
6. A bypass valve (10) according to claim 5, wherein anyone of the first (13) and the second (15) wear resistant materials is a cobalt-based alloy.
7. A bypass valve (10) according to any of the precedingclaims, wherein a lowermost section of the cage (18) is devoidof perforations.
8. A bypass valve (10) according to any of the precedingclaims, wherein the plug (28) is at least partially hollow and itsouter wall is provided with a plurality of perforations along atleast 30 % of its height.
9. A bypass valve (10) according to any of the claims 2-8,wherein, in the assembled state of the bypass valve (10), theheight of the annular seat gasket (35) is reduced by 1,5 mm due to compression forces.
10. A replacement kit for a bypass valve (10), thereplacement kit comprising: - a substantially axially extending valve body (16), 12 - a fixedly arranged, cylindrical cage (18) provided witha plurality of perforations for allowing steam to enter the interiorof the valve body (16), - a plug (28), reciprocally movable within the interior ofthe valve body (16), - a detachable, substantially annular valve seat (34), - a compression ring (22) being arranged so that it rests against an internal lip (24) provided in the valve body (16), - an annular seat gasket (35) made in compressiblematerial and being arranged between the valve seat (34) and the compression ring (22), wherein - the valve seat (34) is rendered immobile between the cylindrical cage (18) and the seat gasket (35).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1930340A SE1930340A1 (en) | 2019-10-20 | 2019-10-20 | A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valve |
| PCT/SE2020/051004 WO2021080485A1 (en) | 2019-10-20 | 2020-10-20 | A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1930340A SE1930340A1 (en) | 2019-10-20 | 2019-10-20 | A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE1930340A1 true SE1930340A1 (en) | 2021-04-21 |
Family
ID=73452254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1930340A SE1930340A1 (en) | 2019-10-20 | 2019-10-20 | A bypass valve for a steam turbine being part of a power plant and a replacement kit for a steam turbine bypass valve |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE1930340A1 (en) |
| WO (1) | WO2021080485A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1120790A (en) * | 1965-02-15 | 1968-07-24 | Schaffer & Budenberg Ges M B H | Improvements in or relating to valves for reducing the pressure and temperature of superheated steam |
| DE4422478A1 (en) * | 1993-06-28 | 1995-01-05 | M & Fc Holding Co Inc | Two-way valve and process for its manufacture |
| DE202015104151U1 (en) * | 2015-08-07 | 2015-10-08 | Samson Ag | Control valve |
| DE202017104280U1 (en) * | 2017-07-19 | 2018-10-29 | Samson Aktiengesellschaft | Valve component assembly and control valve with a valve component assembly |
| CN110345264A (en) * | 2019-08-09 | 2019-10-18 | 无锡市亚迪流体控制技术有限公司 | Heavy caliber superhigh pressure difference steam evacuation valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2570790B1 (en) * | 1984-09-26 | 1987-03-20 | Sereg Soc | VALVE VALVE WITH REMOVABLE SEAT AND FAST MAINTENANCE |
| US5156181A (en) * | 1991-07-22 | 1992-10-20 | Allied-Signal Inc. | Removable seats for a dual poppet valve |
| US7854239B2 (en) * | 2008-03-03 | 2010-12-21 | Fisher Controls International Llc | High temperature valve |
| US10344757B1 (en) * | 2018-01-19 | 2019-07-09 | Kennametal Inc. | Valve seats and valve assemblies for fluid end applications |
-
2019
- 2019-10-20 SE SE1930340A patent/SE1930340A1/en not_active Application Discontinuation
-
2020
- 2020-10-20 WO PCT/SE2020/051004 patent/WO2021080485A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1120790A (en) * | 1965-02-15 | 1968-07-24 | Schaffer & Budenberg Ges M B H | Improvements in or relating to valves for reducing the pressure and temperature of superheated steam |
| DE4422478A1 (en) * | 1993-06-28 | 1995-01-05 | M & Fc Holding Co Inc | Two-way valve and process for its manufacture |
| DE202015104151U1 (en) * | 2015-08-07 | 2015-10-08 | Samson Ag | Control valve |
| DE202017104280U1 (en) * | 2017-07-19 | 2018-10-29 | Samson Aktiengesellschaft | Valve component assembly and control valve with a valve component assembly |
| CN110345264A (en) * | 2019-08-09 | 2019-10-18 | 无锡市亚迪流体控制技术有限公司 | Heavy caliber superhigh pressure difference steam evacuation valve |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021080485A1 (en) | 2021-04-29 |
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