Abstract: A valve with a valve seat and a valve disk has the valve disk configured such that it can be brought into a first position in which it is in contact with the valve seat where the valve is closed, and can be brought into a second position in which the valve is open. The valve has at least one spring element, and the valve seat can be displaced against a force exerted by the at least one spring element by bringing the valve disk from the second position into the first position and thereby deforming the spring element.

Abstract: A diverter valve which includes a valve body, an inlet, a plurality of outlets, an internal cavity to which the inlet and the outlets are connected, and a valve member which is movably positioned in the cavity. The valve member includes a through bore which is configured to connect the inlet with a corresponding one of the outlets for each of a plurality of operative positions of the valve member. In operation of the diverter valve, the valve member is movable between its operative positions to selectively connect the inlet with any one of the outlets.

Abstract: The present invention provides a gate valve assembly having a valve body with a channel extending from a distal end to a proximal end, a gate configured to be moved from a first position to a second position, the second position being when the gate is positioned in the channel of the valve body between the distal end and the proximal end of the valve body. A seat insert is also provided to be threaded into a pocked of the valve body and a seat is configured to be positioned within the seat insert. A seal is adapted within a groove of the seat insert positioned between the valve body and the seat insert, wherein the seal is a fixed static seal providing no gaps and/or spaces between the seal insert and the valve body allowing no debris to corrupt the seals.

Abstract: An embodiment includes a gate valve comprising: a valve body including a cavity coupled to a channel having proximal and distal portions; a gate to seal and unseal the channel; proximal and distal seats adjacent the gate; wherein (a) the proximal seat traverses towards the gate and stops at a first position when the gate is closing and the proximal channel portion is more highly pressurized than the cavity, and (b) the distal seat slides away from the gate and stops at a second position when the gate is closing and the cavity is more heavily pressurized than the distal channel portion. Other embodiments are described herein.

Abstract: Valve comprising a body (2), a centred butterfly (1), mounted with the ability to rotate inside the body (2) from an open position revealing the passage to a closed position covering said passage, and a seal (3) arranged inside a housing which is delimited by the seat and by a face, opposite the seat in the closed position, of the butterfly, the seat and the face converging towards the inside in the axial direction. The seal (3) moves freely in the housing.

Abstract: A method of sealing a coolant control valve of a cooling system for a power device which generates heat as a by-product of operation. The cooling system includes a pump, a heat exchanger, and coolant. The valve includes: an internal channel in fluid communication with the exchanger; a sealing package in contact a surface of the coolant control valve and bounding a portion of the cooling system and the channel; and a rotary element in the channel and rotatable to open and close the valve. The portion is bounded in part by the valve and the sealing package. The method includes: starting-up the device; creating a pressure differential of at least 0.2 bar between the coolant in the portion of the cooling system, and the coolant in the internal channel; rotating, using a motor, the rotary element; opening the valve; and pumping, using the pump, the coolant through the internal channel.

Abstract: A top entry ball valve a pipeline mainly used in Oil and Gas Industry, Chemical and pharmaceutical Industries. The system allows for replacing all the ball valve components and seals while the valve body is still in the pipeline. The ball valve assembly has four main components: the body, gearbox, ball, and seats. Disassembly and reassembly may be performed utilizing various tools to allow removal and reinstallation of the ball, seats, seals, or other components therein without the need to remove the ball valve assembly from a pipeline.

Abstract: A control valve includes: a port, which is shaped in a tubular form; a valve element; and a metal seal, which contacts the valve element. A gap is formed between a tubular portion of the metal seal and the port in a perpendicular direction that is perpendicular to an axial direction of a flow passage of the port. Thereby, when the valve element is displaced in the perpendicular direction, the valve element urges the metal seal to displace the metal seal in the perpendicular direction in the state where the metal seal contacts the valve element.

Abstract: A valve actuation mechanism comprises a housing, an actuation pin rotatably mounted within the housing and at least one torque spring coupling the actuation pin to the housing for biasing the actuation pin from a first, inoperative rotational position towards a second, operative rotational position. The mechanism further comprises an actuation pin retaining element for selectively retaining the actuation pin in its first position, the retaining element being engageable with the actuation pin and the housing when the retaining element is in a retaining position so as to prevent rotation of the actuation pin towards its second position, and selectively disengageable from the housing to permit rotation of the actuation pin towards its second position. A locking element is provided for selectively preventing disengagement of the retaining element from the housing.

Abstract: The invention relates to a method for producing a metering valve (1) for a fluid, in particular for a liquid and/or gaseous fuel, comprising a preferably plate-shaped valve seat element (2) having at least one throughflow opening (3) for the liquid and/or gaseous fuel, a lift-movable valve disk (4) that sealingly interacts with the valve seat element (2) for releasing and closing the at least one throughflow opening (3), and a stroke stop element (5) having an annular stroke stop surface (6) for limiting the stroke of the valve disk (4). According to the invention, the stroke stop element (5) is axially pretensioned in the direction of a stroke adjustment ring (7) surrounding the valve disk (4). In order to finely adjust the stroke of the valve disk (4), the axial pretensioning force is altered, whereby the stroke stop element (5) is deformed. The invention further relates to a metering valve (1) for a fluid.

Abstract: A valve includes a valve body, a sleeve within the valve body and a rotatable valve element that has one portion within the sleeve to control flow of media through the valve and another portion extending from the valve body and coupled to an actuator that rotates the valve element. The valve element is rotatable to a first position to flow media to one port and to a second position to flow media to another port. The sleeve has a pair of side openings. Each side opening has an angled perimetrical edge and is aligned with a corresponding port member. A half dovetail shaped groove is formed by the angled perimetrical edge of each side opening, the corresponding port and the valve body. A seal is lodged within each groove to form a seal that exhibits reduced unswept volume and which wipes debris off the valve element as it rotates.

Abstract: A valve sealing arrangement, including a valve body, and a closing member including a closing member contact surface, and a seat, having a center axis, and provided with a sealing portion with a first sealing surface for making contact with the closing member and a back sealing portion with a second sealing surface for making contact with a surface of the valve body. The seat also includes a bellows between the first sealing surface and the second sealing surface wherein the bellows including bellow members wherein adjacent bellow walls form either inwardly open fold or outwardly open fold and wherein one or more of the bellow members extends in a direction that is oblique to the center axis of the seat.

Abstract: A motorized ball valve has valve body with an actuator bracket receiver. The actuator bracket receiver has a pair of rails. The ball valve also includes a valve stem extending through the actuator bracket receiver and an actuator operably connected to the valve stem. A mounting bracket is connected between the actuator and the valve body to support the actuator. The mounting bracket is captured between the pair of rails of the actuator bracket receiver to offset torsional forces generated by the actuator.

Abstract: A control valve includes a valve housing, a joint member, a valve body, and a sealing tube member. The sealing tube member has a biasing pressure receiving surface that receives a pressure of a liquid inside the valve housing and biases the sealing tube member to the valve body side. An area S1 of the biasing pressure receiving surface and an area S2 of a valve sliding contact surface of the sealing tube member are set to satisfy Expressions (1) and (2), S1<S2?S1/k ??(1) ??k<1 ??(2) where k is a pressure reduction constant of a liquid flowing through a minute gap between the valve sliding contact surface and the valve body, and ? is a lower limit value for the pressure reduction constant determined based on physical properties of a liquid.

Abstract: A system, in certain embodiments, includes an annular ball valve seat including an annular spring, which biases the annular ball valve seat axially. More specifically, in certain embodiments, the annular ball valve seat includes a main body section, a lip section extending from the main body section, and a seat groove between the main body section and the lip section, wherein the first annular spring is disposed within the seat groove. A first leg of the annular spring biases the lip section in a first axial direction and a second leg of the annular spring biases the main body section in a second axial direction opposite the first axial direction. The annular ball valve seat is configured to be disposed within a ball valve, on either side of a ball of the ball valve. The particular design of the annular ball valve seat enables pressure within a body cavity of the ball valve to be self-relieving.

Abstract: Valve seats may include an insert and a housing. The insert may comprise a first material and the housing may comprise a second material. The second material of the housing may exhibit a hardness that is greater than a hardness of the first material of the insert. Valve assemblies and related method may include valve seats.

Abstract: An eccentric butterfly valve includes a valve body formed therein with an internal flow passage extending in a direction of the flow passage axis, a disk-shaped valve member disposed in the internal flow passage and supported by the valve body through valve stems to be rotatable about a rotation axis R, and an annular valve seat portion provided on an inner periphery of the internal flow passage, and the internal flow passage is opened and closed by rotating the valve stem to bring a sealing surface of an outer peripheral edge portion of the valve member into and out of contact with the valve seat portion. The valve member is further provided in one of the principal surfaces with a groove portion extending in a direction across the rotation axis R, and both side walls of the groove portion are formed as convex curved surfaces extending in a convex shape.

Abstract: The present invention provides a flow channel switching valve with a reduced number of components as well as a reduced weight, and a method for assembling the same. A valve shaft adapted to be coupled to a valve element so as to transmit torque of a rotary drive portion to the valve element is inserted through a vertical through-hole, which penetrates through the valve element in the direction of the rotation axis O (i.e., vertical direction), and through a fit-insertion hole provided in a valve body. Then, a drive gear that forms the rotary drive portion is fixed to the upper coupling portion of the valve shaft protruding from the fit-insertion hole so that the valve shaft is rotatably supported with respect to the valve body.

Abstract: According to an embodiment of the disclosure, a jig for assembling a fully welded ball valve includes a fastening end having a projecting insertion pipe inserted through the first end piece pipe to an inside of the second end piece pipe and configured to support the first end piece pipe to stably maintain a state of the first and second end piece pipes being inserted through the insertion holes of the valve body, a pressurizing plate configured to pressurize the second end piece pipe to the first end piece pipe, a pressurizing device configured to press the pressurizing plate to pressurize the second end piece pipe, a load cell configured to measure a pressure applied by the pressurizing device, and a controller configured to output the pressure measured by the load cell.

Abstract: A firesafe bidirectional floating ball valve comprising: a housing; first and second annular seats that hold between them a ball that is rotatable to open and close the valve to fluid flow; an annular spring on one side of the ball that operates to seal both of the seats to the ball; and an annular ridge coaxial with the first seat; wherein with the valve closed, net pressure on the ball in a direction from the second fluid flow port to the first fluid flow port operates to displace the ball and apply force to the first annular seat that closes a narrow clearance space between the ball and the first annular seat.

Abstract: Valve comprising a valve body having an upstream conduit for the inflow of a fluid and a downstream conduit for the outflow of a fluid, said conduits being substantially aligned along a longitudinal axis (X-X), a rotative ball controlling the fluid passage and having a cavity with axis perpendicular to its rotating axis (Y-Y), a first upstream seat operating in conjunction with said upstream conduit and said rotative ball, a first downstream seat operating in conjunction with said downstream conduit and said rotative ball, a second downstream seat axially arranged between said first downstream seat and said downstream conduit, and an intermediate element axially arranged between said first downstream seat and said second downstream seat and axially moveable between said first downstream seat and said second downstream seat.

Abstract: Selectable control valves and mattress systems incorporating the same are disclosed. In one embodiment, an inflatable mattress system includes a pump, a selectable control valve in fluid communication with the pump, and a mattress pad having a plurality of inflatable chambers that are in fluid communication with the selectable control valve. The selectable control valve includes a valve case having an inlet port and a plurality of supply ports, a stepper motor having a motor body that is coupled to the valve case, a rotating plate having a passage and coupled to the stepper motor, and a plurality of seal cartridges positioned within the valve case. The seal cartridges each include an engagement spring and a compliant seal, where the engagement spring maintains a load on the compliant seal such that the compliant seal forms a fluid tight seal with the rotating plate.

Abstract: A cooling circuit for a vehicle may include a plurality of cylinder heads into which cooling water is continuously introduced from a plurality of cylinder blocks oppositely disposed parallel with each other, wherein a flow control valve may include a head port, through which the cooling water discharged from the plurality of cylinder heads is joined and the joined cooling water is introduced into the flow control valve, and wherein the flow control valve also may include a set of ports including a radiator port, a heat exchanger port, and a heater core port, through which the cooling water introduced into the flow control valve is discharged towards a radiator, an oil heat exchanger, and a heater core, respectively.

Abstract: An insert adapted for use in a plug valve includes a single-piece body having an inner sidewall adapted to interface with a sidewall of a valve plug. First and second opposing apertures are each defined through the single-piece body for selective alignment with a flow bore of the valve plug. First and second opposing slots are each defined through the single-piece body at an angle to the first and second opposing apertures for allowing the body to flex in the direction of the first and second opposing apertures.

Abstract: An ultrasonic surgical blade includes a body having a proximal end, a distal end, and an outer surface. The distal end is movable relative to a longitudinal axis in accordance with ultrasonic vibrations applied to the proximal end. At least a portion of the outer surface of the body comprises a lubricious coating adhered thereto. The lubricious coating has a coefficient of friction that is less than the coefficient of friction of the outer surface of the body.

Abstract: A valve system for metering fluid flow to an engine of a work machine is disclosed. The valve system may include a valve body which defines an annular inlet, an annular outlet, and a substantially spherical valve chamber therebetween to form a passageway. The valve system may have a spherical valve member with a fluid passage therethrough which is configured to rotate within the valve chamber to selectively meter fluid from the inlet to the outlet. The valve system may have a seat ring with a longitudinal bore with an elliptical cross-section and a sealing face hemispherically contoured to match the spherical valve member surface.

Abstract: A connection fitting (8) of a heat management module (1) of an internal combustion engine can be inserted into a receptacle hole (9) in a housing (2) of the heat management module. The aim is to be able to bias a sealing ring (16) of the nozzle against a rotary valve (3) using a compression spring element (13). The connection fitting is to be provided with a stop (24) that limits the longitudinal movement of the sealing ring in the direction of the rotary valve.

Abstract: A ladder stabilization support assembly for lateral and vertical stabilization support to ladders in general and long span extension ladders in particular preventing the ladders from lateral movement such as tipping, overturning or slipping off the supporting grounds. The assembly is built to take advantage of a light-weight t-slotted aluminum profile and comprises two telescopic support legs pivotally mounted on opposite sides of a ladder to effectively support and level the ladder on any uneven supporting grounds. An adjustable sliding mechanism provides for a smooth, low tolerance and wobble-free telescopic sliding function with numerous length adjustments positions. A pivot joint provides for endless number of pivotal and swivel adjustment positions. The assembly can quickly and easily be mounted onto the ladder, remain permanently attached to the ladder or be taken off the ladder when not in use. The assembly also allows extension ladders to operate in a self-supporting stand-alone mode.

Abstract: A device (1) for controlling the flow of a fluid through a conduit (3) from an upstream side (8) to a downstream side (10). The device includes a housing (4) having one or more valve apertures (6) through which the flow of fluid is selectively controlled. A valve member (12) is mounted on the housing and arranged to move reciprocally to selectively open and close the one or more valve apertures. A seal (20) is arranged at or beyond a position the valve member reaches when the one or more valve apertures are all closed. The device also includes a resilient member (26) that acts to bias the seal towards the valve member.

Abstract: The valve (1) comprises a body (2) delimiting a conduit (4) and having a connection portion (6) where one end of the conduit (4) opens, the connection portion (6) being intended to be connected to the storage tank (100). In addition, said valve (1) comprises a clamping member (22) movably mounted on the connection portion (6) in order to keep the connection portion (6) attached to the storage tank (100), sealing member (10) able to rotate in the conduit (4) between a closed position in which the sealing member (10) seals the conduit (4) and an open position in which the sealing member (10) opens a passage through the conduit (4), two seats (24) interposed between the sealing member (10) and the valve body (2), and elastic return means configured to keep the seats (24) and the sealing member (10) pressed together. The conduit (4) has an angled portion (42) arranged between the connection portion (6) and the sealing member (10).

Abstract: Provided is a rotary type valve device capable of being easily assembled and securing desired sealing performance. The rotary type valve device includes a rotor having an internal passage formed around an axis and an opening portion which opens outward from the internal passage to an outer contour surface in a radial direction, a housing supporting the rotor to be rotatable around the axis and defining an axial passage communicating with the internal passage and a radial passage facing the outer contour surface and capable of communicating with the opening portion, a passage member disposed in the housing to define a part of the radial passage, and a biasing spring biasing the passage member toward the outer contour surface. The housing comprises a housing body accommodating the rotor, and a holding member coupled to the housing body and having a tubular portion holding the biasing spring and the passage member.

Abstract: A control valve includes a casing that has a port in which an outflow opening is formed, a joint that is joined to an opening end surface of an outflow opening in the port, a rotor that is rotatably accommodated inside the casing, a slide ring that has a slide surface for sliding on an outer circumferential surface of the rotor, a sealing ring that is interposed between an inner circumferential surface of the port and an outer circumferential surface of the slide ring, and a holder that is disposed between the inner circumferential surface of the port and the outer circumferential surface of the slide ring and holds the sealing ring from an outer side in a port axial direction with respect to the sealing ring. The holder is disposed to be separated from at least any of the joint and the port.

Abstract: A valve (1), in particular a vacuum valve, with at least one closure member (2) which has a wedge-shaped closure region (3), and with at least one valve seat (5) which surrounds a valve opening (4) of the valve (1), wherein, in a closed position of the closure member (2), the wedge-shaped closure region (3) bears sealingly against the valve seat (5) and closes the valve opening (4) and, in an open position, opens up the valve opening (4) so that fluids and/or solids can be transported through the valve opening (4), wherein the closure member (2) with the wedge-shaped closure region (3) is mounted so as to be movable back and forth between the closed position and the open position along a movement path (6), wherein the movement path (6) is angled-off and/or bent.

Abstract: An annular safety valve sealing package comprises an annular safety valve comprising a tubular housing; a first annular sealing element comprising a first elastomeric material and disposed about the tubular housing of the annular safety valve; a second annular sealing element comprising a second elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the first annular sealing element; and a third annular sealing element comprising a third elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the second annular sealing element and on an opposite side of the second annular sealing element from the first annular sealing element. At least two of the first elastomeric material, the second elastomeric material, or the third elastomeric material have different compositions.

Abstract: A rotary fluid regulator (1, 300) has a housing (2) with at least one inlet opening (3, 4) and at least one outlet opening (5). A valve element (7, 100) is received rotatably in the housing (2) and is a hollow fluid duct (8). A drive element (19, 301, 401, 501) is provided to rotate the valve element (7, 100) so that a fluidic connection between the at least one inlet opening (3, 4) and the at least one outlet opening (5) can be adjusted or blocked. A brake element is provided for influencing or blocking the movement of the valve element.

Abstract: The technology of the present application provides a floating ball valve. The ball valve includes a valve body having a recess or chamber and a ball contained in the recess. A valve seat forms a sealing relationship between the ball and the fluid conduit. The valve seat has a resilient seat or member formed on the valve seat that confronts a surface of the ball. An energized spring seal on the opposite side forms a seal between the valve body and the valve seat and pushes the resilient seat towards the ball.

Abstract: The present invention relates to a sealing element (100) of an axial turbomachine for the sealing of regions at or in at least two static components of the turbomachine, wherein the components can be moved axially relative to one another. The sealing element (100) has a first radial region (1) with a first stiffness or rigidity and a second radial region (5) with a second stiffness or rigidity, wherein the first stiffness and the second stiffness are different from one another, and the sealing element (100) is configured as segmented in the peripheral direction of the turbomachine.

Abstract: A waterway switch and on-off mechanism includes a fixing portion, a switch mechanism, an on-off mechanism and a driving mechanism. The driving mechanism includes a rotating base, a first sliding sleeve and a second sleeve. The rotating base has a first incline section, a first flat section, a second incline section and a second flat section; the coupling of the first incline section and the first sliding sleeve corresponds to the coupling of the second flat section and the second sliding sleeve, the rotating base drives the first sliding sleeve, the second sliding sleeve couples to the second flat section; the coupling of the second incline section and the second sliding sleeve corresponds to the coupling of the first flat section and the first sliding sleeve, the rotating base drives the second sliding sleeve, the first sliding sleeve couples to the first flat section.

Abstract: A valve seat device including a valve seat and a seat stiffener, the seat stiffener formed from a non-elastomeric material and positioned on a radially outward-facing surface of the valve seat, an outer diameter of the radially outward-facing surface of the valve seat being greater than an inner diameter of the seat stiffener.

Abstract: A valve and a method for producing a valve for regulating a fluid, having a valve housing with a central part and with two connection ends, the connection ends extending away from the central part, wherein internally of the central part there is arranged a valve body including at least a shutoff part and a through-flow part. The valve seat is arranged in the valve housing and resiliently bears against the valve body, a resilient structural part has a spring action that acts in a direction substantially parallel with the flow direction of the valve and has at least one annular flange part adapted for bearing on the valve body. The resilient valve seat includes a fixing member for mechanical fixing of the valve seat in the valve housing. The fixing member has a flange part fixed in the valve housing by plastic deformation.

Abstract: Disclosed herein is a valve apparatus for vehicles that is configured such that the sealability of a valve body can be markedly enhanced. The valve apparatus includes a valve body, a valve member and a sealing unit. The valve body is provided with at least two ports and has an internal space communicating with the ports. The valve member is rotatably installed in the internal space so as to open or close the ports. The sealing unit is provided to seal at least one of the ports. The sealing unit includes a sealing body airtightly installed on an inner surface of the corresponding port, and at least one elastic element integrally provided on a first end of the sealing body. The elastic element axially applies elastic force to the sealing body so that a second end of the sealing body comes into airtight contact with the valve member.

Abstract: Severe service industrial valves having at least one valve ball and seat that can be repaired or replaced while the valve remains connected in-line with inlet and outlet pipe lines.

Abstract: A ball valve having an anti-rotational pressure plate that allows for a balanced pressure load on a valve member is provided. Additionally, the pressure plate can also fix the rotation of an adjacent flow disk, allowing for angular-orientation specific flow characterizing features to be used with the flow disk. By fixing the rotation of the flow disk, the ball valve can characterize flows using a greater variety of flow disk geometries, including angular-orientation dependent and angular-orientation independent flow disks. Further, the pressure plate could also be directly in the form of a flow disk that has anti-rotation features.

Abstract: Disclosed herein is a bellow for use in a ball valve, the bellow comprising: a metallic seat at an end of the bellow for providing a contact surface with a ball of a ball valve; and a metallic body integral with the seat; wherein the metallic body has a longitudinally elastic property such that, when the bellow is in use in a ball valve and the bellow is arranged within the housing of the ball valve so that it is always under longitudinal compression, substantially only the compression in the bellow causes the seat to apply a sealing force against the ball of the ball valve that maintains a mechanical seal between the seat and the ball valve. Advantageously, embodiments allow a new design of ball valve that maintains a high standard of performance in subsea environments over long time periods.

Abstract: The invention relates to a device for measuring the differential pressure in a flowing fluid. The invention has a housing having two coaxial openings and an inner space. The inner space can be accessed by at least one of the openings. A measuring nozzle is arranged in the housing and has a flow channel with a cross-sectional constriction, and a differential pressure sensor comprising two measuring inlets for sensing a difference between pressures at the measuring inlets. A first one of the measuring inlets is in connection with the flow channel. A second one of the measuring inlets is in connection outside of the measuring nozzle with the inner space, and with a shut-off body. The shut-off body includes the measuring nozzle and is rotatably mounted in the housing about a rotation axis. The shut-off body, in a first rotational angle position, connects the flow channel to the two openings, and in a second rotational angle position blocks a flow between the two openings.

Abstract: The present invention includes a variable sprinkler orifice device that can change orifice sizes using a rotating disk with multiple orifices along the circumference of the disk. According to first preferred embodiment, the implement preferably includes a conduit in which water is directed through a series of rotatable plates which preferably include incrementally sized orifices. According to a further preferred embodiment, the variable orifices are automatically and quickly adjusted based on VRI data to change the combination of orifices used.

Abstract: The present invention provides a thin film spacer for maintaining a gap between a slit valve door and a sealing surface of a slit valve, such as a metallic insert. The film spacer can extend the life of a seal by limiting the line of sight exposure of the seal to corrosive gases within a wafer processing chamber, for example, and by controlling the compression percentage of the seal. The spacer may be located on an outer ambient side of the slit valve away from any corrosive gasses that may exist in the chamber.

Abstract: The invention relates to a fluid valve, in particular for the exhaust gas from a motor vehicle, comprising: a body (30) defining at least one duct (32), and a movable flap that can rotate about a shaft between a closed position preventing the fluid from flowing through the duct (32) and an open position allowing the fluid to flow through the duct (32). According to the invention, the valve includes an opening clearance (E) between flap and a wall (62) of the body (30) for the passage of the fluid, said clearance (E) extending in a direction parallel to the pivot shaft of the flap over a length that varies according to the angular position of the flap.

Abstract: An assembly can include a valve seat for an exhaust bypass valve of a serial turbocharger system; and a gasket that includes a planar portion that defines a perimeter and that includes a tab that extends from the perimeter of the planar portion for engagement with the valve seat to secure the gasket to the valve seat. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: A rotative member has a first passage and a first surface. A tubular member has a second passage and a concave spherical surface. The second passage is communicable with the first passage according to a rotation angle of the rotative member. The rotative member is rotatable and slidable on the concave spherical surface to form a seal between the rotative member and the tubular member when the concave spherical surface is in pressure contact with the first surface on application of a biasing force. A biasing force application member applies the biasing force to the tubular member. The biasing force application member has a second surface, which is in contact with the tubular member and slidable relative to the tubular member.