DE202019102087U1 - Valve seat cage assembly - Google Patents

Valve seat cage assembly

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Publication number
DE202019102087U1
DE202019102087U1 DE202019102087.3U DE202019102087U DE202019102087U1 DE 202019102087 U1 DE202019102087 U1 DE 202019102087U1 DE 202019102087 U DE202019102087 U DE 202019102087U DE 202019102087 U1 DE202019102087 U1 DE 202019102087U1
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DE
Germany
Prior art keywords
valve
valve seat
cage
sealing
cage assembly
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.)
Active
Application number
DE202019102087.3U
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German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samson AG
Original Assignee
Samson AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samson AG filed Critical Samson AG
Priority to DE202019102087.3U priority Critical patent/DE202019102087U1/en
Publication of DE202019102087U1 publication Critical patent/DE202019102087U1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/42Valve seats
    • F16K1/422Valve seats attachable by a threaded connection to the housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243Packings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/246Combination of a sliding valve and a lift valve

Abstract

A valve seat cage assembly (18) comprising a valve cage (20) and a valve seat (22), the valve seat (22) being threadable into the valve cage (20) in a threaded area (32), the valve cage (20) and the valve seat (22) each have a sealing surface (39, 38) for fluidic sealing, via which they are interconnected, wherein the valve seat (22) has a radially outwardly extending projection (34), wherein between the projection (34) and Valve cage (20) has a free space is formed in which a sealing element (24) is received, which has a larger outer diameter than the maximum outer diameter of the valve seat cage assembly (18) in the region from the front end of the threaded portion (32) of the valve seat (22) the diameter of the projection (34), characterized in that the sealing surface (39, 38) of the valve cage (20) and the valve seat (22) is in each case conical, wherein the valve cage (20) and d he valve seat (22) in the assembled state over the threaded portion (32) and via the sealing surfaces (38, 39) are in contact with each other.

Description

  • The invention relates to a valve seat cage assembly for use in a valve, which can be used in particular at very low or very high fluid temperatures of a process fluid according to the protection claim 1.
  • In a generic valve for controlling a process fluid, a valve cage is introduced in the transition from an inflow and outflow side of a valve, in which an axially movable piston is guided, which determines the opening width of the cage via its position. In known manner, the piston is connected linearly movable to a drive of the valve for changing the position. Furthermore, such a valve in addition to the valve cage also includes a valve seat which seals the valve in a closed position in which the piston comes into contact with the valve seat.
  • Valves that operate at extreme fluid temperatures have a large gap between the actual valve and the actuator. Therefore, it is advantageous to connect the valve seat with the valve cage, so that they can be used together during assembly as a valve seat cage assembly in the valve housing.
  • From the DE 10 2015 009 421 A1 For example, a valve is known which comprises a valve housing in which a valve cage is inserted. At the valve cage a valve seat is arranged. The valve housing has a portion with a radially inwardly extending shoulder, which forms, together with a radially outwardly facing shoulder of the valve seat an annular groove-shaped seal receiving, in which a seal is arranged, which prevents leakage between the valve cage / valve seat and the valve housing , The seal receiver is axially limited by the respective shoulder of the valve housing and the valve cage / valve seat.
  • The US 2014/0264135 A1 discloses a valve with a valve seat cage assembly comprising a valve cage and a valve seat screwed into the valve cage. The valve seat is centered opposite the valve cage. For this purpose, a centering portion is provided on the valve seat, which is arranged between a threaded portion and a cylindrical sealing portion. This arrangement has the disadvantage that the thread is accessible in the screwing-in direction for the process fluid, with the result that the thread is exposed to the process fluid, as a result of which, especially when aggressive media are used, the thread becomes less easily releasable.
  • It is the object of the invention to provide a valve seat cage assembly which is easier to manufacture over the prior art and easier to assemble.
  • In a known manner, a valve seat cage assembly comprises a valve cage and a valve seat, wherein the valve seat is screwed in a threaded portion in the valve cage. The valve cage and the valve seat each have a sealing surface in order to connect them to one another in a fluid-tight manner. The valve seat is formed at its end opposite the valve cage with a radially outwardly extending projection. Between the projection and the valve cage, a free space is formed, in which a separate sealing element is received. The sealing member has a larger outer diameter than the maximum outer diameter of the valve seat cage assembly in the range from the front end of the threaded portion of the valve seat to the diameter of the projection.
  • According to the invention the sealing surface of the valve cage and the valve seat is each formed conically, wherein the valve cage and the valve seat in the assembled state over the threaded portion and the conical sealing surface are in contact with each other. The conical sealing surface serves as a metallic seal between the valve cage and the valve seat. It is advantageously resistant to media used as well as temperature and pressure fluctuations. Furthermore, the conical design of the sealing surface during assembly of the valve seat cage assembly for centering the valve seat in the valve cage contribute. The simultaneous centering and sealing simplifies the assembly of the valve seat with the valve cage.
  • According to one embodiment, the conical sealing surface of the valve cage and the valve seat between the threaded portion and the projection of the valve seat is arranged. By this arrangement, a reliable centering between valve cage and valve seat is given during the screwing of the valve seat with the valve cage, whereby the merging of valve seat and valve cage is facilitated.
  • According to a preferred embodiment, the threaded portion between the shoulder and the conical sealing surface of the valve cage and the valve seat is arranged. The valve seat can be screwed so far into the valve cage until the corresponding conical sealing surface of the valve seat and the valve cage are pressed together, whereby a metallic seal between valve seat and valve cage takes place. This configuration results in an improved seal on the valve cage end facing the valve seat.
  • Preferably, the sealing element surrounds the valve seat circumferentially. This arrangement allows the sealing member to be slid onto the valve seat prior to assembly of the valve seat with the valve cage. When mounting the valve, the sealing element is advantageously limited axially by the projection of the valve seat, so that the entire valve seat cage assembly comprising the valve cage, the valve seat and the seal assembly can be incorporated as a unit in the valve housing and also removed again. This arrangement simplifies both the assembly and maintenance tasks of the valve and ensures a seal between the valve seat and the valve housing in a transition region where the valve seat cage assembly and the valve housing face each other.
  • According to an alternative embodiment, the valve cage is formed from its outer wall radially inwardly rebounding with a reduced wall thickness, so that the sealing element partially encloses the valve cage or partially the valve cage and the valve seat circumferentially. By reducing the wall thickness of the valve cage creates a radially inwardly recessed exception between the valve cage and the valve housing in the transition region, the exception is limited in the axial direction on one side by the valve cage and on the other side by the projection of the valve seat. An outer wall of the radially inwardly recessed portion has a smaller outer diameter than the maximum outer diameter of the valve cage and thereby allows easy mounting of the seal member. It is therefore possible to arrange both soft, flexible sealing elements and rigid sealing elements, which are used in particular at very high or very low temperatures, in a simple manner on the valve cage.
  • In the recessed exception, the sealing element is used, whose inner diameter is adapted to the outer diameter in the range of reduced wall thickness. By the sealing element, the seal between the valve housing and the valve cage or between the valve housing and the valve cage and the valve seat is made. The limited in the axial direction of the valve cage and the valve seat sealing element can be used in this way together with the valve seat and the valve cage in the valve housing and removed.
  • According to a preferred embodiment, the sealing element has a first diameter, which is matched to the outer diameter in the region of the recessed exception of the valve cage, and the sealing element has a radially inwardly extending flange portion, which serves to seal the axial expansion between the valve cage and the Valve seat is compressed. The flange-like region of the sealing element allows the sealing element to be arranged in the expansion between the valve seat and the valve cage. Since the flange portion of the seal member is compressed between the valve cage and the valve seat, the seal member may act as an axial seal between the valve cage and the valve seat. The soft seal protects the threaded area especially against aggressive media. Since the threaded portion is disposed between the flange portion of the sealing member and the conical sealing surface, an improved double-sided protection of the thread is achieved. The thread is hardly exposed to the process fluid and the connection between the valve cage and valve seat can be solved more easily even after the use of aggressive media.
  • According to one embodiment, the sealing element has a U- or V-shaped cross-section, wherein an opening of the sealing element is aligned in the direction of the valve cage. Alternatively, the opening of the sealing element facing away from the valve cage. The sealing element is annular and in particular has a U- or V-shaped cross-section. The position is determined depending on whether the valve is intended for a so-called "flow-to-close" or "flow-to-open" application. The opening is directed against the flow direction.
  • According to a further aspect of the invention, this relates to a valve comprising a valve housing cover and a valve housing, wherein the valve housing has an inflow and an outflow connection and a transition region with a central recess between inflow and outflow connection, wherein a valve seat described above Cage assembly is inserted into the valve body.
  • The valve cage is inserted into the valve housing in such a way that the transition area of the valve housing overlaps with a sealing area, which is designed to receive a sealing element. Within the valve cage, a piston is guided, which can assume a sealing position together with the valve seat.
  • Preferably, the valve cage is bolted to a retaining ring, which in turn is bolted to the valve housing, the retaining ring centering the valve cage, and holding it so that the sealing region of the valve seat cage assembly lies in the transition region of the valve housing.
  • Furthermore, the valve housing may have a shoulder in the region of the transition region. At this shoulder, the valve seat with its valve cage facing away from the end can be supported in the axial direction, so that the valve seat cage assembly between the shoulder and a valve housing cover can be clamped. The valve seat cage assembly can for example be clamped directly through the valve housing cover or by a screwed into the valve housing retaining ring.
  • Further advantages, features and possible applications of the present invention will become apparent from the following description in conjunction with the embodiments illustrated in the drawings.
  • In the description, the claims, and the drawing, the terms and associated reference numerals used in the list of reference numerals below are used. In the drawing:
    • 1 a sectional view of a valve with a valve seat cage assembly according to the invention;
    • 2 an enlarged detail of a valve seat cage assembly according to the invention in a valve, according to a first embodiment;
    • 3 an enlarged detail of a valve seat cage assembly according to the invention in a valve, according to a second embodiment; and
    • 4 an enlarged detail of a valve seat cage assembly according to the invention in a valve according to a third embodiment.
  • 1 makes a valve 10 This is a valve housing 12 , a valve housing cover 14 as well as a drive 16 includes. In the valve 10 is a valve seat cage assembly according to the invention 18 used a valve cage 20 , a valve seat 22 and a separate sealing element 24 includes. The valve housing 12 has a transition area in its transition from its outflow to inflow side 26 on top of both the valve cage 20 as well as the valve seat 22 comprises circumferentially. The valve seat cage assembly 18 is on a housing shoulder 28 in the transition area of the valve body 12 is introduced, supported and by a clamping screw 30 kept in position.
  • 1 shows a valve 10 that is used for process fluids with extreme temperature. In that regard, the valve housing extends 12 in the direction of the drive 16 over a wide area, so the drive 16 in particular at least four times the transition region diameter is spaced from the transition region.
  • In the following figures, the valve seat cage assembly is described in more detail. The same components are given the same reference numerals although they relate to different embodiments.
  • So shows 2 an enlarged view of the transition area 26 and the design of the valve housing provided there 12 , as well as sections of the valve cage 20 , the valve seat 22 and the separate sealing element 24 ,
  • When assembled, the valve seat is 22 in the valve cage 20 screwed in, with the valve seat 22 and the valve cage 20 over a threaded area 32 connected to each other. The valve seat 22 is with a radially outwardly extending projection 34 educated. In the present case, the valve cage 20 and the valve seat 22 essentially the same outer diameter D1 on and are in the transition area 26 of the valve housing 12 plugged in. The valve housing 12 has radially inward an insertion bevel 27 for easier insertion of the valve seat cage assembly 18 in the valve body 12 ,
  • Between the projection 34 of the valve seat 22 and the valve cage 20 is a circumferential free space 36 in the area of the valve seat 22 educated. In this free space 36 is the sealing element 24 used. The sealing element 24 encloses the valve seat 22 circumferentially and has a larger outer diameter than the maximum outer diameter, in this case the outer diameter D1 of the valve cage 20 and the valve seat corresponds. The sealing element 24 is presently designed as a sealing ring which has a U-shaped cross-section and with its opening in the direction of the valve cage 20 is aligned. The sealing element 24 is in axial contact with the valve body 12 , This way is in the transition area 26 the transition between the valve body 12 and the valve seat cage assembly 18 sealed, so that leakage between the inflow and outflow area is avoided.
  • According to the invention, the valve cage 20 and the valve seat 22 each a conical sealing surface 38 . 39 on, they are fluid-tight with each other in the plant. The conical sealing surface 38 at the valve seat 22 is present between the threaded area 32 and the lead 34 arranged. When assembling the valve seat 22 with the valve cage 20 serves the conical sealing surface 39 the valve cage as an insertion slope for the valve seat 22 , whose conical sealing surface 38 towards the valve cage 20 rejuvenated. Through the conical sealing surface 38 of the valve seat 22 and the conical sealing surface 39 of the valve cage 20 is a smooth transition when centering the valve seat 22 in the valve cage 20 provided with sharp edges when Assembly of the valve cage 20 and the valve seat 22 are reduced. The conical sealing surface 39 of the valve cage 20 and the conical sealing surface 38 of the valve seat 22 serve advantageously as a radial centering, which the merging of valve seat 22 and valve cage 20 facilitated during the screwing.
  • When the valve seat 22 completely in the valve cage 20 is screwed in, pushes the valve seat 22 in the area of the conical sealing surface 38 against the valve cage 20 , The conical sealing surface 38 forms an axial stop between the valve seat 22 and valve cage 20 , By this arrangement is in the screwed state of the valve seat 22 such with the valve cage 20 connected to a metallic seal between the valve seat 22 and the valve cage 20 forms, with this seal between the sealing element 24 and the threaded area 32 is arranged.
  • Furthermore, the valve seat 22 so far into the valve cage 20 be screwed until the conical sealing surface 38 of the valve seat 22 and conical sealing surface 39 of the valve cage 20 pressed together. Due to the attack results in a gap 46 between the valve seat 22 and the valve cage 20 , The size of the gap 46 is compared to the inner diameter of the valve cage 20 very low, therefore, the process fluid penetrates only badly into the gap due to the Venturi effect 46 one while the valve 10 is open.
  • 3 shows a further embodiment of a valve seat cage assembly according to the invention 18 , In contrast to 2 grab the valve cage 20 and the valve seat 22 in this embodiment in a threaded area 32 into each other, between the conical sealing surface 38 of the valve seat 22 and the lead 34 is arranged. In the area of the valve seat 22 is the sealing element 24 in the surrounding free space 36 used to prevent leakage between the valve body 12 and the valve seat cage assembly 18 to avoid. When assembling the valve seat 22 with the valve cage 20 forms the conical sealing surface 39 of the valve cage 20 a stop for the valve seat 22 , In bolted condition is the valve seat 22 such with the valve cage 20 connected to the conical sealing surfaces 38 . 39 a metallic seal between the valve cage 20 and the valve seat 22 result.
  • 4 shows a further embodiment of a valve seat cage assembly according to the invention 18 , The present is the threaded area 32 between the conical sealing surface 38 and the lead 34 arranged. As a result, the thread of the threaded area 32 is separated on both sides of the process fluid, whereby contamination or damage to the thread is reduced, as in 3 is described.
  • In contrast to 2 and 3 In this embodiment, the opening of the sealing ring 24 aligned in the direction of the valve seat. The seal 24 is between the valve cage 20 and the valve housing 12 added. The lead 34 of the valve seat 22 forms an axial extension between the valve seat 22 and the valve cage 20 , According to this special design, the seal points 24 a flange-like waistband 42 which extends radially inward and in the axial extension between the valve seat 22 and the valve cage 20 is arranged. This arrangement on the one hand ensures that the sealing ring 24 is set not only in the radial direction, but also in the axial direction and on the other hand for improved sealing of the transition between the valve cage 20 and the valve seat 22 , The soft seal 24 protects the threaded area 32 especially against aggressive media. Because of the threaded area 32 between the flange area 42 of the sealing element 24 and the conical sealing surfaces 38 . 39 is arranged, an improved double-sided protection of the thread in the threaded area 32 reached. The thread is hardly exposed to the process fluid and the connection between the valve cage 20 and the valve seat 22 Can be easily solved even after the use of aggressive media.
  • LIST OF REFERENCE NUMBERS
  • 10
    Valve
    12
    valve housing
    14
    Valve cover
    16
    drive
    18
    Valve seat cage assembly
    20
    valve cage
    22
    valve seat
    24
    sealing element
    26
    Transition area
    27
    Insertion slope of the valve housing
    28
    housing shoulder
    30
    clamping screw
    32
    threaded portion
    34
    head Start
    36
    circumferential free space
    38
    conical sealing surface of the valve seat
    39
    conical sealing surface of the valve cage
    40
    Recess on the valve cage
    42
    flange-like collar
    46
    gap
    D1
    Outer diameter valve seat cage assembly
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 102015009421 A1 [0004]
    • US 2014/0264135 A1 [0005]

Claims (10)

  1. A valve seat cage assembly (18) comprising a valve cage (20) and a valve seat (22), the valve seat (22) being threadable into the valve cage (20) in a threaded area (32), the valve cage (20) and the valve seat (22) each have a sealing surface (39, 38) for fluidic sealing, via which they are interconnected, wherein the valve seat (22) has a radially outwardly extending projection (34), wherein between the projection (34) and Valve cage (20) has a free space is formed in which a sealing element (24) is received, which has a larger outer diameter than the maximum outer diameter of the valve seat cage assembly (18) in the region from the front end of the threaded portion (32) of the valve seat (22) the diameter of the projection (34), characterized in that the sealing surface (39, 38) of the valve cage (20) and the valve seat (22) is in each case conical, wherein the valve cage (20) and the valve seat (22) in the assembled state over the threaded portion (32) and over the sealing surfaces (38, 39) are in contact with each other.
  2. Valve seat cage assembly according to Claim 1 , characterized in that the valve seat (22) is formed such that the conical sealing surface (38) between the threaded portion (32) and the projection (34) is arranged.
  3. Valve seat cage assembly according to Claim 1 , characterized in that the valve seat (22) is formed such that the threaded portion (32) between the conical sealing surface (38) and the projection (34) is arranged.
  4. Valve seat cage assembly according to Claim 2 or 3 , characterized in that the sealing element (24) abuts circumferentially on the valve seat (22) and / or on the valve cage (20).
  5. Valve seat cage assembly according to Claim 4 , characterized in that the valve cage (20) is formed from its outer wall radially inwardly rebounding with a reduced wall thickness, so that the sealing element (24) the valve cage (20) or the valve cage (20) and the valve seat (22) circumferentially surrounds ,
  6. A valve seat cage assembly according to any one of the preceding claims, characterized in that the sealing member (24) has a first diameter matched to the inside diameter of the recessed portion of the valve cage (20) and the sealing member (24) has a radially inwardly extending flange portion has, which is received compressed to the axial seal between the valve cage (20) and the valve seat (22).
  7. Valve seat cage assembly according to one of the preceding claims, characterized in that the sealing element (24) has a U- or V-shaped cross-section and an opening in the direction of the valve cage (20) is aligned.
  8. Valve seat cage assembly according to one of the preceding claims, characterized in that the seal U- or V-shaped and an opening facing away from the valve cage (20).
  9. Valve (10) comprising a valve housing cover (14) and a valve housing (12), said valve housing (12) having an inlet and a drain port and a transition region (26) with a central recess between inflow and outflow port, wherein a valve seat cage assembly according to any one of the preceding claims in the valve housing (12) is inserted, wherein the valve seat cage assembly (18) is inserted into the valve housing (12) such that the transition region (26) of the valve housing (12) with a A sealing area (B) adapted to receive a seal member (24) overlapping the valve seat cage assembly (18), a piston being guided within the valve cage (20) which is capable of sealing with the valve seat.
  10. Valve after Claim 9 , characterized in that the valve housing (12) in the region of the transition region (26) has a housing shoulder on which the valve seat can be supported in the axial direction, so that the valve seat cage assembly (18) between the housing shoulder and a valve housing cover (14) can be clamped or slippage of the valve seat through the transition region (26) is avoidable.
DE202019102087.3U 2019-04-11 2019-04-11 Valve seat cage assembly Active DE202019102087U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE202019102087.3U DE202019102087U1 (en) 2019-04-11 2019-04-11 Valve seat cage assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019102087.3U DE202019102087U1 (en) 2019-04-11 2019-04-11 Valve seat cage assembly

Publications (1)

Publication Number Publication Date
DE202019102087U1 true DE202019102087U1 (en) 2019-05-06

Family

ID=66629984

Family Applications (1)

Application Number Title Priority Date Filing Date
DE202019102087.3U Active DE202019102087U1 (en) 2019-04-11 2019-04-11 Valve seat cage assembly

Country Status (1)

Country Link
DE (1) DE202019102087U1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140264135A1 (en) 2013-03-14 2014-09-18 Fisher Controls International Llc Valve seat apparatus for use with fluid valves
DE102015009421A1 (en) 2015-07-20 2017-01-26 Samson Aktiengesellschaft Control valve for adjusting a process fluid flow of a process plant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140264135A1 (en) 2013-03-14 2014-09-18 Fisher Controls International Llc Valve seat apparatus for use with fluid valves
DE102015009421A1 (en) 2015-07-20 2017-01-26 Samson Aktiengesellschaft Control valve for adjusting a process fluid flow of a process plant

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