Abstract: A gasket for sealing between the open end of a manway nozzle body of a containment vessel and an associated cover comprising a resilient annular ring member having a bail including a plurality of rigid arcuate inserts spaced about the bail that extends between radially inner and radially outer depending legs. The bail includes at least one annular upstanding chevron extending about an upper surface and at least one annular depending chevron extending about a lower surface. The inserts and bail have about the same thickness. A method includes compressing the gasket between the manway nozzle and cover, and the rigid inserts limit the compression of the gasket.

Abstract: Provided is a spiral wound gasket that makes it less likely that gaps that are in communication with each other in a spiral shape will remain between layers of a filler member exposed at a gasket face in a state before the gasket is clamped and that is capable of exhibiting sufficient sealability for flanges provided at pipe joints. The present invention provides a spiral wound gasket in which a laminate of a hoop member made of metal and a filler member is wound around an opening and integrated, and which has gasket faces at respective end portions, wherein, at each of the gasket faces, an end portion of the filler member protrudes past an end portion of the hoop member, and the gasket faces have a surface roughness Rz of 30 ?m to 200 ?m.

Abstract: The present invention is for sealing gaskets applicable to pipes, valves and boiler equipment. In this context, the present invention provides a sealing gasket for piping systems comprising (i) a core (10) formed by a plurality of concentric metal rings (10a), each ring (10a) comprising a substantially rectangular cross-section, wherein the height of the rectangular cross-section is the same for all the rings (10a), and (ii) surface coating (12) of flexible material applied to the upper and lower surfaces of the core (10). The present invention also provides the manufacturing process of said sealing gasket. Thus, the present invention provides a sealing gasket (i) that eliminates the need for an external rigid ring, (ii) that is easy to conform for reduced-diameter sealing gaskets and (iii) can be easily formed into different shapes, such as an oval shape, which is particularly useful for sealing between the body and the gate valve bonnet.

Abstract: An isolation gasket for use between facing flanges of two flow conduit sections for fluid passage therethrough. The isolation gasket includes non-conductive layers and coatings that cover a flat metal core ring to provide electrical isolation, and a fire resistant layer adjacent another non-conductive layer wherein this side by side arrangement uniquely maintains a seal during a fire. In one form, a serrated ring portion of the flat metal core ring has a convex profile.

Abstract: The invention relates to a method for producing a sealing element, in particular a sealing ring, for sealing a connection of two flanges, of which at least one has a non-plane sealing surface, wherein at a plurality of circumferential positions (UP1 to UPn) lying in the circumferential direction of at least one flange, preferably of both flanges, in particular circumferential positions that are equidistant from each other, a distance value between the sealing surfaces of the flanges facing each other is determined at several locations that lie one behind the other in a direction perpendicular to the circumferential tangent, in particular in a radial direction, for each of the circumferential positions and a single thickness value is determined from the several distance values of each circumferential position and a sealing element is produced in dependence on all thickness values, which depend on the circumferential position, which sealing element has a thickness that depends on the circumferential position, w

Abstract: An engine includes a V-shaped cylinder body, first and second exhaust manifolds inside a V-shaped line, and an exhaust pipe. The exhaust pipe includes a first upstream end portion into which exhaust gases discharged from first cylinders to the first exhaust manifold flow, and a second upstream end portion into which exhaust gases discharged from second cylinders to the second exhaust manifold flow. A spiral wound gasket seals a gap between the first exhaust manifold and the first upstream end portion.

Abstract: The present invention has an object of providing a spiral gasket that is less influenced by thermal deterioration of a part of members thereof in high-temperature and high-pressure conditions than a conventional spiral gasket and thus is guaranteed to have stable sealing performance for a long time. A spiral gasket includes a sealing portion including a metal hoop member that has a cross-sectional shape including bent parts and is spirally wound around to have a plurality of winds such that the bent parts of the winds overlap one another; and a filler member located between the winds of the metal hoop member in a radial direction. At least a part of the filler member in a spiral direction is formed of a non-iron metal material having high deformability.

Abstract: The gasket includes a sealing strip comprising a resilient material, the resilient material comprising a chemically exfoliated vermiculite (CEV) component in a proportion of at least 25% w/w of the sealing strip, the said CEV component being at least partially derived from dry CEV, wherein the sealing strip does not include a carrier strip, made by the process of the application of a wet sealing strip material to a forming sheet to form a layer; partially drying the wet sealing strip layer on the forming sheet; removing the layer from the forming sheet; and (d) cutting the layer into strips suitable for use in the formation of a spirally wound gasket.

Abstract: A spiral gasket includes: a gasket body having a body portion, an inner peripheral empty winding portion, and an outer peripheral empty winding portion. An inner ring having an outer peripheral surface on which an inner ring pawl portion engageable with the inner peripheral empty winding portion and an outer ring having an inner peripheral surface on which an outer ring pawl portion engageable with an outer peripheral surface of the outer peripheral empty winding portion are formed. The number of turns of the inner and outer peripheral empty winding portions are set to 5 to 10. Respective gaps are formed between the inner/outer peripheral surface of the inner/outer peripheral empty winding portion and a portion of the outer/inner peripheral surface of the inner/outer ring except for the inner/outer ring pawl portion.

Abstract: A spiral wound gasket for sealing flanged joints. The spiral wound gasket has improved sealability with a spiral sealing element that includes a metallic strip and a relatively soft filler material, wherein the axial width of the relatively soft filler material is greater than the axial width of the metallic strip. The spiral wound gasket also has improved sealability with a controlled gasket density and in which the metallic strip has a uniform and symmetrical “V” or “W” cross-sectional shape.

Abstract: A spiral wound gasket (20) is disposed between joint members (22, 24) of a hot fluid joint to seal a gap (48) therebetween. The spiral wound gasket (20) includes a first high temperature performance metallic strip (28) formed of a thermally conductive alloy, including, Ni Cr, and Fe, spirally wound around a central axis (A) to present a first high temperature performance metallic winding (30) exposed to hot fluids. A first non-metallic filler strip (32) formed of a mica material is spirally wound outwardly of the first high temperature performance metallic winding (30) to form a first non-metallic filler winding (34). A second high temperature performance metallic strip (36) formed of a stainless steel material is spirally wound outwardly of the first non-metallic filler winding (34). A second non-metallic filler strip (40) formed of a graphite material is spirally wound outwardly of the second high temperature performance metallic winding (38).

Abstract: A spiral wound gasket includes a resilient sealing element including spirally wound, alternating layers of metal banding and winding fill material that incorporates a significant quantity of talc with quantities of fiber and binder. Either or both of an outer guide ring and inner guide ring may extend from peripheral outer and inner surfaces of the sealing element. Embodiments of the gasket overlay one or both axial faces of the sealing element with a layer facing material that incorporates a significant quantity of talc with quantities of fiber and binder.

Abstract: A spherical annular seal member includes a spherical annular base member defined by a cylindrical inner surface, a partially convex spherical outer surface, and large- and small-diameter-side annular end faces and of the partially convex spherical outer surface, as well as an expandable annular coating layer formed integrally on the cylindrical inner surface of the spherical annular base member. The coating layer consists of a mixture of acid-treated graphite and wax.

Abstract: A helical backup element includes a tubular body of material and a helical opening in the tubular body.

Abstract: A sealing element including a tube-shaped body of metallic material and first and second male sealing members arranged at a respective end of the body. At least two intermediate members are arranged in series in the body between the first and second male sealing members. Each one of the intermediate members is compressible so as to be capable to store elastic energy when the body is subjected to axial compression and includes a protuberance arranged in the body and extending around the center axis of the body. A coupling device provided with such a sealing element.

Abstract: An enlongated stopper device for flow-control of molten metal from a vessel, containing molten metal, said device comprising: a) a body (10) made of a refractory ceramic material, b) a bore hole (12), having a longitudinal axis (A) and extending from an upper surface (10u) of said body downwardly, c) a rod (14), penetrating with one end (14l) into said bore hole (12) and being fixedly secured within said body (10), d) a sealing member (18), being arranged within a space adjacent to or being part of said bore hole (12), said space being defined at least partly by unlike surface sections (12a, 12i, 14s) of said rod (14) and said body (10) respectively.

Abstract: A spiral-wound gasket for use in a HF alkylation unit and positioning between facing conduit flanges includes an outer ring, an inner ring, and low-compression spiral-wound portion positioned between the outer ring and the inner ring.

Abstract: A spirally wound gasket is described. The gasket includes a sealing strip (11) wound into a spiral and a support strip (10) wound into a spiral in such a manner that the spiral of the sealing strip is formed interposed between the coils of the supporting strip. The sealing strip comprises a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing strip. The CEV component is at least partially derived from dry CEV, and the sealing strip does not include a carrier strip in one aspect. In another aspect, the CEV component is at least partially derived from dry CEV, and the sealing strip has a moisture level of between 3–20% w/w of the sealing strip resilient material during winding into the said gasket. A method of producing a sealing strip is also described.

Abstract: A spiral wound gasket made of an elongate band with a portion of the elongate band jacketed by a resilient filler material, the jacketed elongate band wrapped in a plurality of overlapping turns to define a radially thick reinforcing member with the band in each turn enclosed by resilient filler material that abuts contactingly to the resilient filler material in an adjacent turn, the overwrapped portions of the elongate band defining opposing sealingly resilient lateral surfaces, with a leading portion and a trailing portion of the elongate band lacking the jacketing resilient filler material and adjacent turns of the leading portion secured together to fix an inner diameter and adjacent turns of the trailing portion secured together to fix an outer diameter. A method and apparatus is disclosed to wind an elongate band jacketed by a filler material around the perimeter of a die until a desired radially thick spiral wound gasket is formed.

Abstract: A spiral wound gasket made of an elongate band jacketed by a sealing material, with the elongate band wrapped in overlapping turns to define a radially thick gasket with an inner diameter for being exposed to a material to be sealed and an outer diameter, in which the jacket of the sealing material defines interior portions of the gasket having the sealing material with a first density between adjacent overlapping turns of the elongate band and defining opposing flange sealing faces of the sealing material with a second density lower than said first density, for use in sealing applications.

Abstract: A gasket having a plurality of superposed windings of a profiled metal strip spirally wound upon itself around a central axis, a plurality of windings of a strip of graphite interposed between at least some of the superposed windings of the metal strip, and a solid ring of graphite on the O.D. Two or more of the radially intermost windings on the I.D. are in surface-to-surface contact with each other without interposed sealing material.

Abstract: A closed annular seal made by joining the two lengthwise end portions of a stretched porous polytetrafluoroethylene band-shaped body, wherein the length w from the internal peripheral portion to the external peripheral portion of the seal is greater than the width t of the external peripheral surface, the annular portion of the seal may be slanted, and the angle of elevation of the annular portion in relation to a horizontal plane formed at one edge of the internal peripheral surface is 0 to 45°.

Abstract: A spirally wound gasket is described. The gasket includes a sealing strip (11) wound into a spiral and a support strip (10) wound into a spiral in such a manner that the spiral of the sealing strip is formed interposed between the coils of the supporting strip. The sealing strip comprises a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing strip. The CEV component is at least partially derived from dry CEV, and the sealing strip does not include a carrier strip in one aspect. In another aspect, the CEV component is at least partially derived from dry CEV, and the sealing strip has a moisture level of between 3-20% w/w of the sealing strip resilient material during winding into the said gasket. A method of producing a sealing strip is also described.

Abstract: A gasket having a plurality of superposed windings of a profiled metal strip spirally wound upon itself around a central axis, a plurality of windings of a strip of graphite interposed between at least some of the superposed windings of the metal strip, and a solid ring of graphite on the O.D. Two or more of the radially intermost windings on the I.D. are in surface-to-surface contact with each other without interposed sealing material.

Abstract: A spiral-wound gasket includes a plurality of tightly wound metal windings to form a core. The windings each have a Chervon cross-section, wherein V-notched undulations of each winding registers with an adjacent winding at said notches. The edges of the windings are welded to form a pre-assembled integral composite that is installed into a J-shaped outer wrap or cover. Finally, the cover is closed about the core so as to entirely cover and encapsulate the core. In a preferred form, both the core and outer cover are formed of stainless steel materials.

Abstract: A gasket (1) is made by repetitively spirally winding a fiber (3) back on itself in a closed path. The gasket (1) so made has a multi-layer spiral winding (1) formed in a loop (5). The fiber (3) can be wound at a constant wrap rate to form a gasket with a uniform cross-section around the loop. Alternatively, the wrap rate can be varied, increased to increase cross-sectional bulk, and decreased to reduce cross-section bulk around the loop (5). Also, the spiral winding (7) can be applied over a core (13) of either strands of the fiber (3) or a dissimilar material providing a desired property such as resiliency, stiffness or others. For high temperature applications, a ceramic fiber (3) can be used. The gasket (1) can have any of various geometric configurations with or without a core (13).

Abstract: A high pressure-high temperature gasket for high pressure-high temperature pipe is disclosed. The high pressure-high temperature gasket comprises a hollow annular member defining an interior tunnel. The interior tunnel is filled with a stuffing to enhance the axial resilience of the annular member such that the high pressure-high temperature gasket can seal the joint between two high pressure-high temperature pipes, and be reused so as to decrease the coat of using the gasket.

Abstract: The present invention relates to a gland packing which is made of a material configured by laminating an expanded graphite tape into a spiral shape by winding. The gland packing can prevent penetration leakage through minute gaps existing in the laminated parts, from occurring, can be sufficiently deformed so as to exhibit sure sealing properties even at a low tightening force, and has properties which result in a small amount of wear so as to ensure high sealing properties, so that high sealing performance can be maintained for a long term. In the gland packing, circumferentially projected parts are disposed on end faces of a die mold packing part made of an expanded graphite tape laminated into a spiral shape so as to be integrated with the part.

Abstract: In order to provide a spiral wound type gasket, in which centering of the gasket body is easy and a good sealing property at a low superficial pressure can be obtained, the spiral wound type gasket is constructed by winding a metal hoop member having an approximately V-shaped cross section and a filler member in a spiral, superposed on each other. In this gasket, an extremity bent portion of the V shape of the hoop member is directed towards the inner peripheral side and in this way it is possible to obtain a good centering and to prevent bulge-out of the filler member towards the interior of the pipe.

Abstract: An improved spiral wound gasket is disclosed that deters and redirects buckling. The invention includes the following: an integral inner ring, a gasket element, outer wraps and a outer guide ring. The integral inner ring is a winding of a thin strip of metal of at least seven revolutions that is overlapped over itself and secured to itself. The gasket element is wound around the integral inner ring and includes a second thin strip of metal and also a thin strip of filler material so as to form alternate layers of the thin strip of metal and filler material. The outer wraps are a winding around the circumference of the gasket element of a thin strip of metal. The invention also discloses a new outer guide ring that has a inside edge that, together with the outside circumferential edge of a spiral wound gasket, defines apertures. These apertures or expansion zones allow filler material to displace radially outwardly rather than radially inwardly to form buckles.

Abstract: A flange seal utilizing a spirally wound steel strip with a V-shaped central portion and a sealing strip between the turns of the steel strip has a pair of layers of soft sealing material on opposite sides of the sealing ring engaging projecting portions of the sealing strip so that the projecting portions of the sealing strip do not exceed 0.5 mm in width beyond the edges of the steel strip.

Abstract: A spiral wound gasket able to compress and seal under very low loads and provide sealing capabilities. The gasket generally includes a spiral wound metal portion and an outer guide ring to limit the compression of the gasket. For improved sealing capabilities a flexible graphite material is molded, extruded or layered onto the opposing faces of the gasket. In one embodiment, the graphite material is applied to substantially all of the gasket. In another embodiment, graphite sheets are applied to the outer guide ring while extruded graphite is applied to the outer surfaces of the metal winding. The spiral wound gasket provides a more durable gasket with low sealing load requirements and elimination of buckling under sealing loads.

Abstract: A spiral wound gasket able to compress and seal under various loads and provide sealing capabilities. The gasket generally includes a spiral wound portion and an outer guide ring to limit the compression of the gasket. The spiral winding is formed of interdisposed windings of a metal and an elastomer sealant. The metal winding has a non-planar cross-section to inhibit buckling under compression. The gasket is dimensioned such that the elastomer sealant winding has a width greater than the width of the metal winding which has a width greater than the thickness of the guide ring. In this manner, the sealant is compressed before compression of the metal winding which can be compressed until the outer guide ring is encountered.