Claims:1. A seal ring 100 for a valve for establishing a seal along a seat of said valve, said sealing ring 100 comprising:
an annular body 102 having an alternating stack of layers of at least one metal member 104 and at least one non-metal member 106, said body having at least one aperture 108 extending through said alternating stack of layers of said metal member 104 and said non-metal member 106; and
at least one pin 110 configured to be received in said aperture 108,
wherein
said body 102 includes a top metal layer with a first flat surface at top face and a first serrated surface at bottom face,
said body 102 includes a bottom metal layer with a second flat surface at bottom face and a second serrated surface defined at top face,
said alternating stack of layers of said metal member 104 and said non-metal member 106 are disposed between said top metal layer and said bottom metal layer,
said metal member 104 includes at least one serration 114 defined on both top face and bottom face of said metal member 104 to hold said non-metal member 106,
said pin 110 is configured to lock said alternating stack of layers of said metal member 104 and said non-metal member 106.
2. The sealing ring 100 as claimed in claim 1, wherein said pin 110 is welded to said body 102 of said sealing ring 100.
3. The sealing ring 100 as claimed in claim 1, wherein said metal member 104 is selected from a group consisting of stainless steel, copper, aluminium and all combination of stainless steel thereof.
4. The sealing ring 100 as claimed in claim 1, wherein said non-metal member 106 is selected from a group consisting of expanded graphite, and polytetrafluoroethylene (PTFE), and mica.
5. The sealing ring 100 as claimed in claim 1, wherein said alternating stack of layers of said metal member 104 and said non-metal member 106 are aligned by means of an indentation 112.
6. The sealing ring 100 as claimed in claim 1, wherein said metal member 104 includes a plurality of serrations 114 defined at both top face and bottom face.
7. The sealing ring 100 as claimed in claim 1, wherein said metal member 104 includes a plurality of serrations 114 defined concentric to said body 102 of said sealing ring 100.
, Description:TECHNICAL FIELD
[001] The embodiments herein generally relate to seal assemblies, more particularly but not exclusively to a laminated seal ring for use with valves handling high pressure, and high temperature.

BACKGROUND
[002] Process control plants or systems often employ valves, such as ball valves, butterfly valves, eccentric-disk valves, eccentric-plug valves, etc., to control the flow of process fluids. Triple offset valves typically include a fluid flow control member (e.g., a disc, a ball, etc.) within a flow control aperture of the valve and rotatably coupled to the body of the valve via a shaft. For example, a butterfly valve may be a double offset valve (also known as a high-performance butterfly valve) or a triple offset valve. Triple offset valves are similar in design to double offset valves except that the control member has an eccentrically shaped circumferential surface to sealingly engage the valve seal. The angled geometry of the control member of a triple offset valve reduces contact area between the control member and the seal during closure, thus reducing wear in any application (e.g., throttling or on-off).
[003] Several embodiments for gaskets are known, however all have limitation regarding sealability at high temperature / pressure causing the slipping of the layers with consequent loss of seal and reduction in the locking torque, another limitation is the rejection of the gasket during the machining process of the blanks that breaks due to low mechanical resistance of the set. The material selected for a seal may vary depending on the requirements of the process control environment in which the seal is to be used. For example, seals may be made of metal, polytetraflouroethylene (PTFE), or laminated graphite. A metal seal is well suited for use with high temperature and high pressure process applications but is generally more susceptible to wear. A PTFE seal provides excellent sealing performance compared to metal seals and requires less torque to unseat a disc from the seal. PTFE seals also provide a relatively long seal life but are limited to process applications that maintain temperatures below 450 degrees Fahrenheit. A graphite laminated seal can withstand much higher temperatures than a PTFE seal and provides excellent shutoff and the ability to maintain tight shutoff after a large number of cycles.
[004] Therefore, there exists a need for a laminated sealing ring for use with valves which eliminates the aforementioned drawbacks.
OBJECTS
[005] The principal object of an embodiment of this invention is to provide a laminated sealing ring for use with valves. The innovation is a new unique product that eliminates the aforementioned drawbacks allowing the gasket to service in high temperature / pressure requirements as well allowing a smooth machining process of the blanks without risk of the layers opening apart The gaskets are manufactured having alternating layers of metal and non metal member where the faces of the metal layers are equidistant serrated to hold and support the non metal member. All set of metal and non metal layer are hold with engineered cross pins welded such that the sealing ring does come to disassembly when subjected to high temperatures, above 300ºC further 450ºC, further 650ºC. The same pins, and radial serration also prevent the seal damage during the machining process of the blank improving productivity and reducing wastage of rejected pieces
[006] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF DRAWINGS
[007] This invention is illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[008] FIG. 1a represents a top view of the seal ring, according to an embodiment of the invention as disclosed herein;
[009] FIG. 1b represents a sectional view of the seal ring, according to an embodiment of the invention as disclosed herein;
[0010] FIG. 2 represents a sectional view of the seal ring having pin assembled in an aperture, according to an embodiment of the invention as disclosed herein; and
[0011] FIG. 3 represents a sectional view of the seal ring assembled to a valve seat, according to an embodiment of the invention as disclosed herein.

DETAILED DESCRIPTION
[0012] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0013] The embodiments herein achieve a sealing ring for use with valves. Further, the embodiments herein achieve a laminated sealing ring having alternating layers of metal member and non-metal member. Referring now to the drawings, and more particularly to FIGS. 1a-3, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0014] For the purposes of this description and ease of understanding, the embodiments of this invention are explained considering the sealing ring for a triple offset valve and a butterfly valve. However, it is also within the scope of this invention to use the sealing ring to any other types of valves.
[0015] FIG. 1a represents a top view of the seal ring, according to an embodiment of the invention as disclosed herein. In an embodiment, the sealing ring 100 includes an annular body 102 having an alternating stack of layers of at least one metal member 104 and at least one non-metal member 106, at least one aperture 108 and at least one pin 110, an indentation 112, at least one serration 114, and an interior opening 116.
[0016] The sealing ring 100 includes the body 102. The body 102 is an annular member having a predetermined size and thickness. Further, the body 102 includes an alternating stack of layers of the at least one metal member 104 and the at least one non-metal member 106. In an embodiment, the body 102 may include a plurality of metal member 104 and a plurality of non-metal member 106 which are stacked above one another. The plurality of metal member 104 and a plurality of non-metal member 106 are attached to each other by an adhesive. However, it is also within the scope of the invention to implement/practice the adhesion of the plurality of metal member 104 and a plurality of non-metal member 106 in any other form without otherwise deterring the intended function of attaching as can be deduced from the description and corresponding drawings. Further, the body 102 has an interior opening 116 that is defined in accordance with the application in which the sealing ring 100 will be used to seal two members (not shown). The shape of the sealing ring 100 is also defined and limited only by its application. The sealing ring 100 has a planar configuration as shown in FIG. 3.
[0017] FIG. 1b represents a sectional view of the seal ring, according to an embodiment of the invention as disclosed herein. The body 102 includes the metal member 104. Each metal member 104 is made of predetermined size and thickness as required for particular application. The metal member 104 includes a top face (not shown) and a bottom face (not shown). The top face and the bottom face of the metal member 104 includes the at least one serration 114. In an embodiment, the top face and the bottom face may include plurality of serrations 114. The serrations 114 defined in the top face and the bottom faces are concentric to the body 102. The serrations are defined on the metal member 104 to hold or support the non-metal member 106. The metal member 104 is selected from a group consisting of all combinations of stainless steel, copper and aluminium and the like.
[0018] The body 102 further includes a top metal layer (not shown) which is made up of same material and shape as that of the metal member 104. The top metal layer includes a first flat surface (not shown) defined at top face and a first serrated surface (not shown) defined at bottom face. Furthermore, the body 102 includes a bottom non-metal layer (not shown) which is made up of similar material and shape as that of the non-metal member 106. The bottom non-metal layer (not shown) includes a second flat surface (not shown) defined at bottom face and a second surface (not shown) defined at top face. The alternating layers of the metal member 104 and the non-metal member 106 are disposed between the top metal layer and the bottom non-metal layer.
[0019] The body 102 further includes the plurality of non-metal layers 106. Each non-metal member 106 is made of predetermined size and thickness as required for particular application. The plurality of non-metal layers 106 is held in a predetermined position by the plurality of serrations 114 defined in the plurality of metal members 104. The plurality of serrations is configured to radially support the alternating metal member 104 and non-metal member 106. The non-metal member 106 is selected from a group consisting of expanded graphite, and polytetrafluoroethylene (PTFE), mica and the like.
[0020] FIG. 2 represents a sectional view of the seal ring having pin assembled in an aperture, according to an embodiment of the invention as disclosed herein. The sealing ring 100 further includes the at least one aperture 108. The aperture 108 extends throughout the body 102 of the sealing ring 100 i.e. each of the metal members 104 and the non-metal members 106 include at least one aperture 108. The sealing ring 100 includes the aperture 108 to receive the at least one pin 110. The pin 110 is passed through the aperture 108 to lock the alternating stack of layers of the metal member 104 and the non-metal member 106. In an embodiment, the body 102 may include a plurality of apertures 108. Each of the aperture 108 formed in the body 102 of the sealing ring 100 is configured to receive the pin 110. The pin 110 is welded to the body 102. However, it is also within the scope of the invention to implement/practice the mounting of pin in any other form without otherwise deterring the intended function of supporting the sealing ring as can be deduced from the description and corresponding drawings. The pin 110 (also referred as welded pin in this description) is made up of predetermined shape, size and thickness. The pin 110 is aligned in the sealing ring to axially support the sealing ring 100 such that the sealing ring does not get damaged when the sealing ring 100 is subjected to high pressure and high temperature. The pin 110 may be selected from a group consisting of a fastener, rivet and the like.
[0021] The sealing ring 100 further includes an indentation 112 defined in the body 102. The indentation 112 is provided in each of the metal member 104 and the non-metal member 106. The indentation 112 facilitates in aligning each of the metal member 104 and the non-metal member 106. Further, the indentation 112 may be of any shape and size.
[0022] The technical advantages provided by the embodiments herein include preventing the seal to open at high temperatures, to machine blanks without breaking them apart during any operation, and avoid usage of additional gasket thereby saving additional expenses on gasket.
[0023] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.