Abstract: A valve assembly has a stationary valve body and a valve member that is movable relative to the valve body at least from a closed position, in which the valve member cooperates with a valve seat to completely obstruct a fluid path formed through the valve body, to an open position, which allows fluid to flow through the fluid path. The valve member has a disc- or ball-shaped rigid component that is overmolded with a flexible component and at least partially encompasses the rigid component in a circumferential direction to form a ring gasket section.

Abstract: A valve assembly has a stationary valve body and a valve member that is movable relative to the valve body at least from a closed position, in which the valve member cooperates with a valve seat to completely obstruct a fluid path formed through the valve body, to an open position, which allows fluid to flow through the fluid path. The valve member has a disc- or ball-shaped rigid component that is overmolded with a flexible component and at least partially encompasses the rigid component in a circumferential direction to form a ring gasket section.

Abstract: Valves for gas engines are disclosed, in particular for wastegates arranged upstream of a turbocharger. Accordingly, a valve for a gas engine, comprises a metal housing having an opening for providing a fluid flow out of the valve, and a metal valve member configured for adjustably restricting the fluid flow through the opening, wherein the housing is made of a first material comprising a steel and wherein the valve member is made of a second material having a thermal expansion coefficient being lower than the first material. By providing the valve member and the valve housing with materials with different thermal expansion coefficients, the expansion of the valve member may be reduced during a rapid temperature increase or heating up of the valve member e.g. when the gas engine is started or accelerated.

Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.

Abstract: The present invention relates to an optical connection device for optically connecting a first connector (42) of a first optical fiber device (44) with a second connector (46) of a second optical fiber device (48) along an optical axis, which comprises a plug part (40) having an elongated shaft (58) having a longitudinal shaft axis (62) and a lumen (60) extending through the shaft (58) along the shaft axis (62) for receiving the first connector (42), the plug part (40) further having a cap (64) at a first end of the shaft (58) which has an insertion opening (66) for insertion of the first connector (42) into the lumen (60), the opening (66) being aligned and communicating with the lumen (60), the plug part (40) having an optical window (68) having a solid body element (69), wherein the plug part (40) is at least in part deformable; and a clamp part (18), wherein the plug part (40) is configured to be at least partially inserted into the clamp part (18), and the clamp part (18) is configured to, when the plug

Abstract: An offset butterfly valve comprising a butterfly disc which receives a splined valve stem is disclosed. The butterfly disc is positioned for sealing an annulus formed in the valve housing when the valve stem is rotated from an open position to closed position. Provision of the spline towards the center of the valve stem and the butterfly disc allows the butterfly disc to move along the valve stem. In a particular embodiment a valve seal is secured to the butterfly disc using a securing disc which is threaded into a threaded cylinder concentric with the butterfly disc.

Abstract: A valve including: a flow channel and a closure member. A first sealing surface is provided along walls of the flow channel and a second sealing surface is provided along outer edges of a sealing section of the closure member. A rotation axis is offset from the sealing section by a first predetermined distance and from a centerline of the closure member by a second predetermined distance. To ensure smooth operation of the closure member at least one of the first and second sealing surfaces has a non-conical shape that is at least in one area asymmetric with respect to the center axis of the closure member.

Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.

Abstract: Example seal glands for butterfly valves are disclosed herein. An example butterfly valve disclosed herein includes a valve body and a valve retainer mounted to the valve body, where the valve body and the valve retainer define a circumferential cavity. The example circumferential cavity includes a first surface substantially perpendicular to a longitudinal axis of a flow path of process fluid through the butterfly valve, a second surface substantially perpendicular to the longitudinal axis, where the second surface offset from the first surface, and a third surface extending between the first surface and the second surface. In the example butterfly valve, the first surface, the second surface, and the third surface enable a seal to translate within the cavity in a direction substantially parallel to the first surface.

Abstract: A valve system may include a valve having a housing with a bore and a valve member positioned within the bore. The valve member may include a valve shaft with a recess. The valve system may also include an actuator having an actuator shaft with an end portion. An adapter may couple the valve shaft and the actuator shaft. The adapter may include a body having a shape corresponding to a shape of the recess of the valve shaft for fitting the adapter within the recess and an aperture extending into the body. The aperture may have a shape corresponding to a shape of the end portion of the actuator shaft for press fitting the adapter onto the actuator shaft. The adapter may fit within the recess and press fit coupled to the actuator shaft.

Abstract: A fluid switchover device includes a housing having at least three ports leading into an interior space; a valve flap rotatably arranged within the housing and having a rotational axis that is mounted to the housing at first and second locations; and a circumferential seal mounted to the valve flap and having first and second evasion portions at first and second locations, respectively, which are configured to evade the rotational axis on the same side of the valve flap, and the valve flap is configured to slidingly engage a boundary of the interior space by means of the circumferential seal, so that at a first position of the valve flap, the first and second ports are connected, and the first and third ports are mutually sealed off, and in a second position, the first and third ports are connected, and the first and second ports are mutually sealed off.

Abstract: An improved butterfly valve having (a) a valve housing, (b) a valve-plate having a peripheral edge located in a central plane when in a fully-closed position, (c) a valve stem configured to rotate the valve-plate about an axis parallel to the central plane to control flow through the valve, and (d) a valve seat configured to engage the peripheral edge to form a seal when the valve-plate is in closed positions, the improvement wherein the valve seat comprises (1) a resilient sealing member having an inward valve-seating surface engaging the peripheral edge therearound and an opposite outward surface; and (2) a ring structure: (i) having an inner surface adjacent to the outward surface; (ii) having the valve stem passing therethrough along the axis; (iii) divided into two sub-ring portions adjacent to each other with valve-stem-adjacent ends; and (iv) sized to permit central-plane-parallel relative sub-ring-portion displacement perpendicular to the axis, thereby lowering valve actuation force.

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 valve member supported by the valve body through valve stems to be rotatable about a rotation axis perpendicular to the flow passage axis, and a seat ring attached to an inner periphery of the internal flow passage. The valve stems include a first valve stem and a second valve stem. The valve body is formed therein with a stem through-hole through which the first valve stem is inserted and a stem bottomed-hole supporting the second valve stem. The valve member is provided with a fitting hole and an engagement groove. A fitting portion provided at the first valve stem is fitted into the fitting hole and an engagement portion provided at the second valve stem is inserted into the engagement groove.

Abstract: An exhaust gas heat recovery system includes a housing, a heat exchanger and a valve assembly. The valve assembly is disposed within the housing and includes a monolithic valve body, a moveable valve plate and a rotatable valve shaft. The valve body includes a bore, a valve seat surrounding the bore and trunnions integrally formed with the valve seat. The trunnions are diametrically opposed to each other and laterally extending outside of the housing. The valve plate coupled for rotation with the valve shaft between a first position allowing exhaust gas flow through the bore and the first exhaust gas passageway, and a second position allowing exhaust gas flow through the second exhaust gas passageway and preventing exhaust gas flow through the bore and the first exhaust gas passageway. The valve shaft being supported for rotation by the trunnions.

Abstract: An exhaust gas heat recovery system includes a housing assembly, a valve assembly and a heat exchanger. The valve assembly is disposed within the housing assembly and includes a shaft and a plate. The plate is rotatable between a first position whereat exhaust gas flow through a first fluid passageway is allowed and exhaust gas flow through a second exhaust gas passageway is prevented, and a second position whereat exhaust gas flow through the second fluid passageway is allowed and exhaust gas flow through the first gas passageway is prevented. The heat exchanger assembly includes a heater core having a working fluid circulating therein. The working fluid is in thermal communication with fluid in the heater core. The housing assembly includes first and second shells attached to each other at a joint. An axis of the shaft being at the joint of the first and second shells.

Abstract: A turbine engine air control valve including a valve body having a fluid flow passage and a valve member disposed in the valve body. The valve member is configured to rotate about a rotation axis between a maximum flow position and a minimum flow position. The valve member includes a vane and a floating member operatively coupled to the vane. The floating member is configured to float relative to the vane, such that when the valve member is in the minimum flow position, the floating member is spaced apart from the valve body to form an annular flow gap that provides a controlled amount of minimum fluid flow across the valve member as the fluid flows through the annular flow gap.

Abstract: A bushing having a shaft seal is disclosed herein. An example apparatus includes a fluid valve body, a valve shaft disposed in the fluid valve body, and a bushing disposed on the valve shaft between the valve shaft and the fluid valve body. The bushing includes a first groove disposed on an inner surface of the bushing and a second groove disposed on an outer surface of the bushing. A first seal is disposed in the first groove to seal against the valve shaft and a second seal is disposed in the second groove to seal against the valve body.

Abstract: A flapper valve having a valve body which includes first and second ends, a flow bore which extends between the first and second ends, and an enlarged diameter cavity which is formed coaxially within the flow bore; a valve seat which comprises a through bore that is aligned with the flow bore; a retainer which is positioned radially outwardly of the cavity; and a flapper which is pivotally connected to the retainer. The flapper includes a sealing side which is configured to engage the valve seat when the flapper is in a closed position, a core which is made of a rigid material, a circular stop ring which is connected to or formed integrally with the core on the sealing side of the flapper and is configured to engage the valve seat when the flapper is in the closed position, and a resilient coating.

Abstract: A multiway valve, comprising integrally connected first and second valves. Each valve comprises a valve body comprising a user port, a source port and an intermediate chamber placed therebetween, and a shutter inside the intermediate chamber, having a passage orifice for fluid to pass therethrough. The multiway valve comprises movement means allowing the shutters to move between a closed position where each passage orifice faces the inner walls of the respective intermediate chamber to an open position allowing the passage of the fluid between the user and source ports through the passage orifice. The first valve comprises a bypass duct formed in the shutter opening in fluid communication with the passage orifice. The bypass duct allows fluid communication between the intermediate chamber, the passage orifice, the duct, and the user and source ports of the first valve when the shutter is in its closed position.

Abstract: An air-conditioning register includes a retainer having an airflow passage, and a shut-off damper, which is pivoted about a damper shaft between opening and closing positions for the airflow passage. The shut-off damper has opposed side sections, which are opposed to each other with the damper shaft located therebetween, and a distal sealing portion. The distal sealing portion includes a curved surface and a planar surface. The curved surface is arranged on the trailing side in a pivoting direction of the shut-off damper towards the closing position. The planar surface is arranged on the leading side in the pivoting direction in a manner defining an acute angle with respect to an opposing direction of the opposed side sections. At least the planar surface is a textured surface having raised features each having a height of 110 ?m±50 ?m.

Abstract: This valve device is provided with: a body (10) that has at least one passage (11, 12) for passing a fluid and valve shaft holes (13, 14, 15); a valve shaft (20), which is passed through the valve shaft holes so as to be rotatable; and butterfly valves (30, 40), which are fixed on the valve shaft and are for opening and closing the passages (11, 12). The butterfly valves (30, 40) are disposed so as to close the passages (11, 12) on a downstream side or an upstream side of the valve shaft holes (13, 14, 15) in a flow direction of the fluid. As a result, it is possible to prevent fluid leakage and achieve effective utilization of exhaust heat in an exhaust heat recovery system.

Abstract: A seat ring for a butterfly valve is mounted on an inner peripheral surface of an internal flow passage extending along the flow passage axis in a valve body of the butterfly valve, so that an outer peripheral edge surface of a valve element supported to be rotatable in the internal flow passage by a valve stem supported by the valve body abuts on the seat ring. The seat ring includes a ring body having a cylindrical shape and extending in the center axis direction, and the ring body is formed at positions opposite to each other in a radial direction of the ring body with a pair of through-holes for allowing the valve stem to pass through. On an outer peripheral surface of the ring body, arcuate projections extending in a circumferential direction are formed apart from the pair of through-holes.

Abstract: A seal for a coupling joining pipe elements has angularly oriented ramp surfaces on an outer surface. The ramp surfaces are arranged in diametrically opposite pairs which are positioned at the three o'clock and nine o'clock positions at the interface between segments forming the coupling. The ramps are expected to mitigate pinching of the seals between the segments as the segments are drawn together, compressing the seals to form a fluid tight pipe joint.

Abstract: A rotatable valve assembly (20) is disclosed. In one embodiment, the rotatable valve assembly (20) includes a valve body (22) and a valve plug (24). The valve plug (24) includes a seal configured to form a fluid-tight barrier with an interior surface of the valve body. The rotatable valve assembly may include additional seals, including a seal (96) provided in the valve body (22). The rotatable valve assembly (20) further may be used with a release mechanism (40) to control the pressure at which the valve plug (24) rotates into an open position.

Abstract: A valve includes: a valve body defining a shaft bore therethrough, an axis of the shaft bore defining a vertical axis; a valve shaft positioned within and configured to rotate within the valve body; a valve disc coupled to the valve shaft and positioned within the valve body, the valve disc configured to rotate within the valve body between an open position and a closed position; and a valve seat positioned within the valve body, the valve seat including an outer surface in contact with the valve body and an inner surface in contact with the valve disc, the inner surface of the valve seat defining a sealing ridge extending radially inward with respect to the vertical axis, the sealing ridge having an annular shape about the valve shaft, the sealing ridge concentric with the valve shaft.

Abstract: A damper assembly having a main body defining a continuous fluid path extending between a first opening and a second opening and a damper door rotatable within the main body to control the flow of fluid through the main body. The main body including an engagement edge extending circumferentially on an inner surface of the main body. The damper door can be rotated relative to the main body to sealingly engage an outer edge of the damper door with the engagement edge. The engagement edge of the main body can be oriented on the inner surface such that the surface area of the outer edge such that engagement of the engagement edge gradually increases as the damper door is rotated to seal the damper door to the main body.

Abstract: A butterfly valve assembly for use in a fluid flow containing particles of debris is provided including a valve element. The valve element has a seal groove that extends about a periphery and defines an upstream side and a downstream side of the valve element. A seal is disposed within the seal groove. A clearance exists between the seal and an edge of the seal groove. Also, a relief is formed in either the valve element or the seal. The particles of debris accumulate in the relief and not the clearance.

Abstract: There is provided an apparatus for controlling fluid flow, comprising a first component for holding or conveying fluid, the first component having a port for the passage of fluid, a fluid passageway (18) from the interior of the first component to the exterior of the first component through the port, a contact valve (1) located in the fluid passageway (18), a second component having an abutment means, and connecting means for connecting the second component to the first component, the contact valve (1) comprising a first valve arm (8) extending into the fluid passageway (18), the first valve arm (8) being movable between an open position in which fluid flow through the fluid passageway (18) is substantially permitted, and a closed position in which fluid flow through the fluid passageway (18) is substantially prevented, wherein, when the second component is connected to the first component, the abutment means moves the first valve arm (8) into the open position.

Abstract: Shaft is rotationally driven, and a valve body rotates together with the shafts and has a cylindrical surface on an outer peripheral surface. A housing has a valve chamber in which the valve body is rotatably accommodated, and the valve chamber has an opening opened or closed by the valve body. The outer peripheral surface is provided to be in a non-contact with the housing. The valve body has a valve seal surface for closing the opening by abutting on a predetermined part set in the housing when the opening is fully closed, and the valve seal surface is directed in the circumferential direction. The valve body has a core metal made of a metal, and the shafts are provided on both ends of the core metal, and a valve seal surface is made of a resin.

Abstract: A butterfly valve includes a valve element that turns with a shaft to control open/closed states of a passage or adjust an opening degree of the passage. The valve element includes a plate and an elastic member provided along an outer circumference of the plate. The elastic member has seal parts that touch and leave an inner surface of the passage to close and open the passage. The plate has specific shapes on both sides with respect to an axis of the shaft, the specific shapes narrowing gaps between the plate and the inner surface on lower-pressure sides of seal centers of the seal parts in a valve closed state.

Abstract: An air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in Ha side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

Abstract: A seat ring for a butterfly valve provided at an inner circumferential surface of a valve body so as to create a seal between the inner circumferential surface of a valve body and the valve disc when closing the valve, and a sealing projection continuously protruding inwardly provided between a pair of bosses formed around a pair of opposite valve stem holes for inserting valve stems positioned radially outwardly of a flow passage direction. The sealing projection consists of a contact surface and an adjacent semi-elliptic surface, wherein the contact line of the contact surface and top portion of the adjacent semi-elliptic surface is a semi-elliptic edge displaced by an offset “h” from a plane defined by a vertical valve centerline and a transversal valve centerline in disc closing direction.

Abstract: An air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in Ha side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

Abstract: An intake device includes: an intake port; and a valve body which is disposed in the intake port and is rotated around a rotation axial line between an open/closed position, in which the valve body includes a valve body main body made of a resin, an elastically deformable seal portion formed to extend along an outer circumferential portion of the valve body main body, and a projection which is provided at a surface part adjacent to a region in which the seal portion is formed in the valve body main body, and has a shape that gradually becomes tapered toward a tip end side.

Abstract: A control damper for a housing of an air-handling unit includes a rigid main body rotatable about a first rotational axis. A sealing element extends radially outwardly from a first side of the rigid main body. The sealing element is formed of a resilient material. The sealing element further includes a resilient lip extending outwardly from a distal end thereof. The lip has a first series of undulations formed in an outer edge thereof, wherein the undulations form a wave-shaped profile in the outer edge of the lip.

Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece together includes several steps. In one step a workpiece stack-up is provided. The workpiece stack-up includes a steel workpiece and an aluminum or aluminum alloy workpiece. Another step involves providing a first welding electrode that confronts the aluminum workpiece, and providing a second welding electrode that confronts the steel workpiece. The first welding electrode has an electrode body and an insert that functions to limit or eliminate heat flux into the electrode body. Other steps of the method involve bringing the first and second welding electrodes into contact with opposite sides of the workpiece stack-up and resistance spot welding the stack-up.

Abstract: A self-sealing butterfly valve includes a valve body, wherein a fluid passage is provided in the valve body, a valve plate of which an outer surface is covered with an elastic sealing layer is provided within the fluid passage, an upper portion of the valve plate is dynamically connected with a driving shaft which is rotatably connected to the valve body, a lower portion of the valve plate is rotatably connected with a supporting shaft which is connected to the valve body, the elastic sealing layer—at outer edges of two end faces of the valve plate axially protrudes outwardly, forming two ring lips attached to an inner wall of the fluid passage, and the ring lips are gradually thicker from outside to inside, so that inner ring faces of the ring lips are inclined faces.

Abstract: The invention is a butterfly valve assembly for above-ground pipelines wherein the valve assembly is inserted between adjacent pipe sections, the pipe sections terminating in a pipe flange. The invention has a valve body which can be directly attached to the pipe flanges of adjacent pipe sections by welding, for example. The valve body includes first and second flange abutment members which align with the flanges of the adjacent pipe sections and can be permanently fastened to the flanges. The butterfly valve and valve seal can be removed from the valve body and replaced or serviced without having detach the remainder of the valve body from the pipeline.

Abstract: A substrate processing apparatus includes: a process container where a substrate is processed; a process gas supply unit configured to supply a process gas into the process container; a substrate placing table installed in the process container; a shaft penetrating a hole at a bottom portion of the process container and coupled to the substrate placing table; a bellows surrounding the shaft and disposed outside of the process container wherein an inner space thereof is in communication with a space of the process container; an inert gas supply system configured to supply an inert gas into the inner space of the bellows disposed outside of the process container; and a component falling prevention unit including at least a first structure disposed along a first portion of the hole at the bottom of the process container and a second structure disposed along a second portion of the hole adjacent to the first structure.

Abstract: Flexible seals for process control valves are disclosed. An example disclosed seal includes a seal for use with a butterfly valve. The example seal includes a substantially flexible ring-shaped carrier configured to be moveably fixed within the butterfly valve and to surround a flow control aperture therein. The example seal includes a seal stiffener adjacent the substantially flexible ring-shaped carrier to increase the stiffness of the substantially flexible ring-shaped carrier in a first flow direction. The example seal includes a substantially rigid seal ring to engage an opposing surface.

Abstract: A plurality of concave portion to be spaced apart from each other in a circumferential direction through a pillar portion is formed in an inner circumferential side of a side surface of a seal ring mounted in a shaft groove formed in an outer circumferential surface of a shaft. The concave portion including a deepest portion, and two inclined portions, connects the inclined portion positioned at an opposite side in a rotational direction and the adjacent pillar portion with a curved surface having a shape convex, and further, makes a width in the circumferential direction of the inclined portion of the rotational direction side smaller than a width in the circumferential direction of the inclined portion of the opposite side in the rotational direction.

Abstract: A composite structure of a rotary valve includes a valve body including a containing hole of the disc, and a metal valve body corresponding to the shape of the valve body and formed in the valve body and covered by the valve body, wherein the metal valve body improves the explosion-proof, pressure-proof, and acid/base-resistant strength and circularity of the valve body in the manufacturing process of the rotary valve, the circularity of the valve body is suitable for connecting with a pipe line. A stem is mounted on the disc, wherein the stem is extended upwardly and combined with a handle/gear/electric/pneumatic/hydraulic, or chain operation component, such that the disc can be opened or closed.

Abstract: Provided is a seal ring which has low-friction characteristics and low-leakage characteristics, reduces drive loss of the automatic transmission of an automobile, and contributes to improvement in fuel consumption of the automobile. The seal ring is attached to a shaft groove on the outer peripheral surface of a shaft. A plurality of recessed sections circumferentially spaced apart from each other with pillar sections interposed therebetween are formed at least on the inner peripheral side of a side surface of the seal ring in contact with the shaft groove. The circumferential opposite ends of each of the recessed sections are formed as squeezing portions formed of curved surfaces convex toward the pillar sections. The depth “h” of a deepest portion in which the axial width of the recessed section is the largest is set in the range of 2 to 17 where the axial width of the seal ring is 100.

Abstract: A valve assembly (2) intended for use together with a pallet container (1) and a liner. The valve assembly (2) comprises a valve (3), a valve seal (4) and an outer lip seal (5). The valve assembly (2) further comprises a support member (6) which is constitutes of a lower guide member (61) and an upper guide member (62).

Abstract: A butterfly valve (100) is provided according to the invention. The butterfly valve (100) includes a valve body (103) including a valve bore (109) passing through the valve body (103) and a shaft bore (112), a valve shaft (121) located in the shaft bore (112) and extending through the valve bore (109), a thermal conductor ring (156) fitted over an end of the valve shaft (121), and at least one compression ring (152) mounted to the thermal conductor ring (156) and located within the shaft bore (112). The at least one compression ring (152) fits partially into and extends partially out of a corresponding at least one ring groove (153) in the thermal conductor ring (156), with the at least one compression ring (152) substantially sealing the thermal conductor ring (156) to an actuator-side shaft bore (112A).

Abstract: A valve assembly (2) intended for use together with a pallet container (1) and a liner. The valve assembly (2) comprises a support member (6). The support member (6) is provided with a guiding hole (63) intended to interact with a lower valve guide member (11).

Abstract: A triple eccentric valve with a symmetric drain-proof ring includes a valve body, a stem, a valve disk, a waterproof washer, and a drain-proof ring. The valve disk is formed as an asymmetric conical shape. The drain-proof ring is an O ring and is arranged in a stepped recess of the valve disk to seal the waterproof washer; the drain-proof ring is symmetric to the axis of the ring. In assembly state, a periphery of the drain-proof ring resists against an inner wall of the annular seat. The drain-proof ring is symmetrical. Furthermore, an inner side or a part of the valve seat has a shape matched to a sweeping track of an outermost point of the drain-proof ring so that when the drain-proof ring moves along the valve seat, only force tangent to the inner side of the valve seat is applied from the drain-proof ring to the valve seat.

Abstract: One embodiment may include an engine breathing system valve (10) for an internal combustion engine breathing system (12) including a valve body (60), a stem (62), and a valve member (64). The valve body (60) has a port (66) with a center axis (CP). The valve body (60) may have a seating surface (68) lying along a cone outer surface (CS) of an imaginary cone (C). The imaginary cone (C) has a cone center axis (CA). The stem (62) is carried by the valve body (60) so that it can rotate. The stem (62) has an axis of rotation (R-i) radially offset from the port center axis (CP). The valve member (64) is connected to the stem (62) and may have a valve member plane (M) axial Iy offset from the axis of rotation (R-i).

Abstract: A wear-resistant valve assembly includes a valve body; a stem penetrating through the valve body; a valve disk installed in the chamber of the valve body and contacting an inner wall of the valve body; a valve body wear-resistant layer formed at an inner annular area of the valve body, which is also at a position contacting the valve disk; and a valve disk wear-resistant layer formed on an outer annular area of the valve disk at a position contacting the valve body; and wherein the valve body wear-resistant layer and the valve disk wear-resistant layer are made of materials selected from carbon alloys and satellite alloys. Furthermore, the valve disk is a triple-eccentric structure; and a drain-proof-ring wear-resistant layer and a valve seat wear-resistant layer are further formed.

Abstract: A flow controller is provided. The controller includes a shell body, a first supporting member, a driving shaft and an elliptical valve. The shell body has a passage passed therethrough. The first supporting member is assembled to the shell body. The driving shaft is assembled to the first supporting member. The elliptical valve is pivotally assembled in the passage and is connected with the driving shaft. The elliptical valve is rotated by the driving shaft for opening or closing the passage. When the passage is closed by the elliptical valve, the elliptical valve tightly abuts against an inner circular wall of the shell body for completely closing the passage, so that the controller is suitable in a high temperature and high pressure environment.