Abstract: A flanged fitting includes an annular fitting flange having an annular end face. A glass liner lines a radially inner annular portion of the annular end face of the annular fitting flange. A radially outer annular portion of the annular end face of the annular fitting flange is free from the glass liner. The radially inner annular portion and the radially outer annular portion of the annular end face of the annular fitting flange define an annular gasket abutment face configured to seat a gasket thereon. An annular gasket includes an annular gasket layer. The annular gasket layer includes a radially inner annular gasket segment including a first material suitable for forming a liquid-tight seal with an opposing flange. A radially outer annular gasket segment surrounds the radially inner annular gasket segment. The radially outer annular gasket segment is fire-rated for forming a fire-rated seal with the opposing flange.

Abstract: A seal for sealing an interface between a container and a lid of a process chamber. The seal comprises a first seal element and a second seal element that are arranged to seal the interface in series, with the second seal element being situated to encounter processing activity upstream of the fist seal element. The first seal element has a deflectable portion and a protrusion extending radially from the deflectable portion. The second seal element has a radially extending recess in which the protrusion of the first seal element is received. The protrusion and recess interlock to restrict separation and/or rotation of the first and second seal elements. Inclined surfaces of the first seal element interact with the second seal element to apply axial sealing forces to sealing surfaces of the second seal member.

Abstract: A sealing part that is inexpensive and enable excellent durability to be secured without the need for a predetermined sealing space as would be required for a double sealing structure. A sealing part seals an inside of a reduced pressure vessel from an outside, in which a high-elasticity polymeric material-eroding eroding substance is present and which is comprised of a substrate processing apparatus carrying out predetermined processing on a substrate housed in the reduced pressure vessel. The sealing part has a radical sealing member and a vacuum sealing member. The radical sealing member is disposed on an inside side of the reduced pressure vessel and is resistant to the eroding substance. The vacuum sealing member is made of the high-elasticity polymeric material and is disposed on an outside side of the reduced pressure vessel. At least one refuge space is formed through at least part of the radical sealing member and at least part of the vacuum sealing member being separated from one another.

Abstract: A fuel injector tip seal is provided including improved resistance to the heat and pressures of combustion gas. According to one aspect, the tip seal is formed from polytetrafluoroethylene and between 10 and 35 percent carbon fiber. The material offers improved surface finish and deformation resistance as well as improved thermal conduction and keeps thermal expansion low as compared to conventional fuel injector tip seal designs. According to a further aspect, a revised seal groove design is provided that allows for expansion and deformation of the tip seal and creates more pressure to the outside diameter face when pressure is applied at the tip. According to another aspect, the tip seal is formed of a flat disk-shaped seal body that can be assembled on the fuel injector by an assembly cone device that allows the disk-shaped seal body to be flipped to a ring-shaped configuration in its assembled position.

Abstract: The invention concerns an electrowetting device comprising first and second immiscible fluids, the liquids being sealed within a structure comprising a cap portion, a base portion, a gasket formed of a first material positioned between a first contact surface on said cap portion and a second contact surface on said base portion, and a first film formed of a second material between said gasket and one of said first contact surface and said second contact surface.

Abstract: A surge relief valve comprising a main valve body having a dome port and an inlet port. The inlet port is in fluid communication with a first fluid. The invention further includes a dome reservoir connected to the main valve body via the dome port and arranged to hold a second fluid, a piston located in the main valve body, the piston in fluid communication with the reservoir, and a dampening ring positioned around the circumference of the piston operatively arranged to dampen the piston, wherein the first fluid exerts an upward force on the piston, the second fluid exerts a downward force on the piston, and the piston is arranged to move in response to a differential in the upward and downward forces, wherein the first and second fluids are isolated from one another.

Abstract: A flexure endurant composition of an elastomer reinforced with a continuous phase of microporous, expanded polytetrafluoroethylene (ePTFE) having a ratio of elastomer to PTFE of approximately 1:1 to 50:1 on a volume basis. The composite is prepared by a coating process and the final articles are prepared by molding or vulcanizing. Such materials can be used to fabricate pump tubing, pump diaphragms, gaskets, bellows and other mechanical devices.

Abstract: The composite material for a metal gasket includes a metal plate; a rubber layer fixed on the surface of the metal plate; and a solid lubricant layer fixed on the rubber layer. The solid lubricant layer contains polytetrafluoroethylene and a resin as main components, and has a friction coefficient equal to 0.15 or lower. Thus, the seal durability of the metal gasket is improved by effectively preventing fretting wear.

Abstract: This invention relates to a method of repairing a moisture barrier separating a paper machine dryer drum from the dryer journal. Such processes of this type, generally, involve filling the cavity between the dryer drum steam intake pipe and the dryer journal with a flowable moisture barrier material. The flowable moisture barrier seals leaks in the dryer journal moisture barrier.

Abstract: In a quick connector for piping 10 for detachably connecting a male member 12 to a female member 11, an O-ring 15 is interposed between the female member 11 and the male member 12 so as to form a seal therebetween, and the O-ring 15 is subjected to a low-friction treatment so that the O-ring can be moved in a direction of an axis of the quick connector 10 by a pressure of an employed fluid.

Abstract: A sealing ring, including a support ring made of an impact-resistant material, and a lip ring made of PTFE, where the lip ring has a holding segment and a sealing segment, and where the holding segment is connected with the support ring by an intermediate layer made of a polymer material. The holding segment and the sealing segment are made of two different PTFE compounds, each adapted to their purpose of use.

Abstract: A piston sealing ring assembly (70) for sealing the piston/cylinder interface of a double-acting gas compressor including a first and second cut piston sealing ring (54,72) each bounded by first and second planar surfaces (6,8), the first piston sealing ring (54) having an overlapped cut with generally circumferentially extending inner and outer overlapping portions (56,58) which contact each other to form a continuous seal extending from the first surface (6) to the second surface (8) of the first piston sealing ring (52) and separating an inner ring gap (62) from an outer ring gap (64). The periphery of the outer ring gap (64) of the first piston sealing ring (54) at the first surface (6) is sealed by the second surface (8) of the second piston sealing ring (72). The second piston sealing ring (72) is similarly disposed in relation to the first piston sealing ring (54) so its outer ring gap (64) is sealed at the second surface (8) by the first surface (6) of the first piston sealing ring (54).

Abstract: An improved seal for a rotary valve for high temperature and high pressure fluids. A removable seal member adapted for disposition between a valve body and a valve member rotatably disposed in the valve body is provided. In one aspect of the invention, the seal member is adapted so that pressure exerted by the valve is sufficient to induce cold flow in the seal member. In another aspect of the invention, the seal member includes a pair of longitudinally disposed slots.

Abstract: A sealing ring, in particular for a piston rod with a circular cross-section, which has a height in the axial direction as well as a surface oriented towards a sliding surface, with the surface being executed to extend cylindrically over a part of the height in order to form a sealing surface and being executed to become wider along a further part. The sealing ring has a high sealing action in the axial direction so that a majority of the gas flows out between the piston rod and the sealing surface so that a gas storage arises.

Abstract: An improved rotary shaft seal assembly is disclosed herein. The seal assembly is disclosed in combination with an example of transmission components with which it may be used. The assembly provides a rotary seal for fluid flow between a stationary cylinder and a shaft which rotates within the cylinder. The shaft includes a porting groove and seal grooves on each side of the porting groove. The seal grooves each include a cast iron and a polymeric (such as Teflon®) seal which form seals between the shaft and cylinder on both sides of the porting groove.

Abstract: A multilayer sheet having high compressive strength, high heat resistance and low permeability relative to fluids, includes layers of graphite foils and metal foils disposed alternating one upon another and parallel, with the graphite foils joined to the metal foils. Each of two layers forming an upper and a lower boundary of the multilayer sheet is a metal foil having a flat outwardly-directed surface completely covered with and joined to a gas-tight foil made of an organic polymer having a long-term temperature stability of at least 150° C. Preferably, no adhesives are used for joining the foils. The multilayer sheet is preferably used for producing flat gaskets.

Abstract: A composite is provided for forming a sealing strip for use in a suction roll of a papermaking machine or other device for maintaining a seal when brought into contact with a surface and that has extended usability and wear. The composite is a blend of a nitrile rubber, graphite, carbon black, and at least one of a silicone oil or polytetrafluoroethylene as a lubricating agent, optionally with a phenolic resin. The sealing strip has silicone oil and/or polytetrafluoroethylene evenly distributed over the contact surface, and when installed into a suction roll or other device, provides a reduced frictional surface.

Abstract: A modified polytetrafluoroethylene resin membrane material is provided for a variety of medical or other applications. The material may be used as a bandage, tissue barrier, article covering or coating. Layers of the membrane may be combined to form tubes useful alone or tubes which can be combined with other tubes or manipulated.

Abstract: A valve with fire-resistant seal for use in industrial piping applications. The valve includes a valve body with a valve element therein. The valve is illustrated as a ball valve, but other valve configurations could also be used. A valve stem engages the valve element so that it can be rotated between open and closed positions. A conventional primary seal is used on the valve stem for normal conditions. The valve body defines a body bearing surface, and the valve stem defines a facing stem bearing surface. A thrust bearing is disposed between the body and stem bearing surfaces, and a fire-resistant seal is positioned radially inwardly from the thrust bearing. Initially, the fire-resistant seal is not engaged with at least one of the body or stem bearing surfaces, and the fire-resistant seal has a thickness less than an initial thickness of the thrust bearing.

Abstract: A hybrid gasket includes a core defining an aperture therein, the core having an outer edge portion and an inner edge portion immediately surrounding the aperture. The gasket further includes a chemically resistant material encapsulating the inner edge portion, and an expanded graphite material encapsulating the outer edge portion. A method of sealing two substantially parallel surfaces includes the steps of interposing between the surfaces a gasket, and securing the surfaces to one another. The gasket including a core defining an aperture therein, the core having an outer edge portion and an inner edge portion immediately surrounding the aperture. The gasket further including a chemically resistant material encapsulating the inner edge portion and an expanded graphite material encapsulating the outer edge portion.

Abstract: The present invention is an improved gasket for use in a wide variety of sealing applications. The gasket comprises a sheet of expanded polytetrafluoroethylene (PTFE) that is helically wrapped around itself and sealed in that orientation. This construction produces a gasket that has significant tensile strength in both its longitudinal and transverse axes. As such, the gasket of the present invention retains all of the operational advantages of PTFE while being quite resistant to creep.

Abstract: A sealing ring disk for a seal at a piston rod with a circular cross-section. The sealing ring disk includes a ring-shaped seal part with a sector-like cut-out as well as a closure part having a main part matched to the cut-out in such a manner that the main part extending in the peripheral direction of the seal part can be inserted into the cut-out in order to assemble the two parts into a single sealing ring disk.

Abstract: A gasket for high pressure, high temperature apparatus is disclosed which is of a generally frusto-conical shape. The smaller diameter portion of the gasket is made primarily from low friction material and the larger diameter portion of the gasket is made from a mixture of high friction material and low friction material, the low friction material being the major portion. The gasket may be made as two parts and joined or not joined together or by double filling a mold and pressing as a single unit.

Abstract: A composite fluoropolymer material contains outer layers consisting essentially of conformable porous polytetrafluoroethylene (PTFE) and interior layers consisting essentially of rigid fluoropolymer material which may be a densified expanded PTFE, wherein the composite layers may optionally contain electrically conductive fillers. The composite is bonded together to form a sheet material that is sufficiently conformable to provide good seal between surfaces and is sufficiently rigid to make the material easy to handle and install. The material of the present invention is particularly suitable for use as a gasket where rigidity is needed, customization or modification of gasket shape is desirable, and/or where a wide, even sealing surface is sought.

Abstract: Side channel compressor, in which the gap (7) existing between the rotor (2) and the housing parts (1) surrounding the rotor (2) is sealed off using a sealing tape (8) introduced into a peripheral groove (9) provided in the corresponding wall regions of the housing parts (1). An impairment of the operability of the side channel compressor by a sealing tape attached to the housing is largely ruled out, in that the sealing tape (8) is held by a solidifying compound (10) which is introduced into groove widenings (11) provided at a plurality of points located in a distributed manner over the circumference of the peripheral groove (9) and which makes a positive connection with the sealing tape (8).

Abstract: A spherical annular seal member which has a cylindrical inner surface defining a through hole in a central portion thereof as well as an outer surface formed in the shape of a partially convex spherical surface, and which is used particularly in an exhaust pipe joint, includes: a reinforcing member made from a compressed metal wire net; a heat-resistant material filling meshes of the reinforcing member and compressed in such a manner as to be formed integrally with the reinforcing member in mixed form, the heat-resistant material and the reinforcing member being provided as principal components in an interior portion of the spherical annular seal member which extends from the cylindrical inner surface to a vicinity of the outer surface formed in the shape of the partially convex spherical surface, aluminum phosphate being also formed integrally with the reinforcing member and the heat-resistant material in mixed form; a sliding layer formed of a lubricating composition which is constituted of boron nitride an

Abstract: The composite gasket of the present invention has improved various properties which are different depending on use conditions, while ensuring sealing properties, by combining a seal material which is selected in accordance with the properties of certain sheet-like seal materials in a substrate. The composite gasket is configured by forming a plurality of slits in a surface of the sheet-like seal materials the slits extending in a thickness direction of the materials, and loading a seal material composed of a substance which is different from a material constituting the sheet-like seal material into the slits and the surface of the seal material.

Abstract: Expansion seal ring with an essentially torus shaped expansion seal (1) which is provided between two concentric positionable connection pieces (2, 3) to be sealed or the like, which include a sealing section (1a) which is pulled over the edge (3a) of one of the two connection pieces (3), and which includes an expandable section (1b), which is provided to be radially effective between the two connection pieces (2, 3), as well as a jacket (4) which essentially completely covers or envelopes the expansion seal (1) at least in the area of the expandable section (1b).

Abstract: An assembly consisting of at least one seal layer and a solid polymer ion exchange layer wherein the seal layer covers essentially only the region of the ion exchange layer which is to be sealed. The seal layer is made of porous polytetrafluoroethylene film having one surface coated and partially impregnated with a solid polymer ion exchange material. The seal layer provides support and masking functions for the solid polymer ion exchange layer during intermediate manufacturing steps, and reinforcement and effective sealing when assembled in an electrochemical apparatus.

Abstract: An oil-submerged sliding member which has a good sealability and wear resistance and low attack to the mating member and which can be used with either a soft or a non-soft mating member. It is made from a resin composition comprising 30-88% by weight of a crosslinked polyallylene sulfide resin having a melt viscosity of 2000-5000 poise at 300.degree. C., 10-45% by weight of a carbon fiber, and 2-25% by weight of recycled polytetrafluoroethylene resin powder, and if required, not more than 10% by weight of molybdenum disulfide. Also, oil seal rings comprising the oil-submerged sliding member.

Abstract: An improved, chemically resistant gasket is constructed from a composite containing outer layers consisting essentially of conformable expanded polytetrafluoroethylene (PTFE) and interior layers consisting essentially of a densified expanded PTFE, wherein the composite layers may optionally contain electrically conductive fillers. The composite is bonded together to form a sheet material that is sufficiently conformable to provide good seal between surfaces and is sufficiently rigid to make the material easy to handle and install. The material of the present invention is particularly suitable for use as a gasket where rigidity is needed, customization or modification of gasket shape is desirable, and/or where a wide, even sealing surface is sought.

Abstract: A composite is provided for forming a sealing strip for use in a suction roll of a papermaking machine that has extended usability and wear. The composite is a blend of a nitrile rubber, graphite, carbon black, and polytetrafluoroethylene, optionally with a phenolic resin. The sealing strip has polytetrafluoroethylene evenly distributed over the contact surface and when installed into a suction roll provides a reduced frictional surface.

Abstract: A seal for movable structural components, such as piston rods or shafts, includes a carrier body made of plastics and a sealing member made of polytetrafluoroethylene (PTFE) material and bonded to the carrier body. A plastic material may be mixed with the PTFE and fused to the plastic carrier body during injection molding.