Abstract: A valve apparatus includes a valve shaft, a body, a bearing housing, a fixing device, and an actuator. The body has a flow path therein, and the flow path has an opening degree that is operated by rotation of the valve shaft. The bearing housing rotatably supports the valve shaft, and the bearing housing has a predetermined attachment portion. The fixing device fixes the bearing housing to the body by fastening the predetermined attachment portion of the bearing housing to an outer surface of the body. The actuator is provided to cover the fixing device from outside, and the actuator is fixed to the body and the bearing housing. The actuator applies a driving force to the valve shaft.

Abstract: A butterfly valve comprises: a body including a valve opening; and a flapper rotatably mounted about a rotation axis so as to be movable relative to the valve opening. The flapper is rotatable at least 180° about the rotation axis so that the flapper is movable to at least one fully opened position, at least one fully closed position 90° apart from the fully opened position, and a third position, either fully opened or fully closed, 180° from the other like position. In one embodiment the flapper is rotatable at least 360° about the rotation axis so that the flapper is movable to each of two opened positions 180° apart, and two closed positions 180° apart from each other and 90° and 270° apart from each of the fully opened positions. The valve can be easily calibrated and controlled, and cleaned to extend the useful service life between cleanings.

Abstract: A straight shaft sealing valve assembly includes a valve body, a shaft, a valve element, and a seal element. The valve body has an inner surface that defines a flow channel. The shaft is rotationally mounted on the valve body and extends across the flow channel. The shaft includes a first seal opening and a second seal opening. The first and second seal openings are spaced apart from each other and extend through the shaft. The valve element is coupled to the shaft and is rotatable therewith, and has an outer periphery. The seal element is coupled to the valve element, extends from the outer periphery, and extends through the first and second seal openings.

Abstract: A control valve assembly that utilizes a butterfly valve having a valve body and a valve disk movable between a closed position and an open position. The control valve assembly includes a flow control device positioned downstream from the butterfly valve. The flow control device includes a series of teeth spaced by a series of flow control channels such that as the valve disk moves from the seated position to the fully open position, the outer sealing edge of the valve disk passes over the series of teeth to gradually expose the flow control channels. The control device aids in reducing cavitation, offers reduced dynamic torque and allows the control valve assembly to be inserted between an inflow pipe and an outflow pipe.

Abstract: A hydraulic manifold has features adapted to the needs of hybrid vehicle applications. In one embodiment, multifunction valves selectively regulate fluid flow among primary and auxiliary flow paths. A normally closed butterfly valve is biased by a relatively small secondary biasing force against rotation in first and second (opposite) directions, and by a relatively large principal biasing force against rotation in the first direction past a transitional angular position at which the principal biasing force takes effect. An actuator selectively controls the transitional angular position and the magnitude of the principal biasing force. In the first direction, flow must overcome only the secondary biasing force to pass the valve. In the second direction, any flow sufficient to overcome the secondary biasing force but not the principal biasing force will divide into a first flow passing the valve and a second flow induced to enter an auxiliary path upstream.

Abstract: A flapper valve assembly and a method of making the same. The flapper valve assembly is mountable to a manifold as a unit. The flapper valve assembly can include bearings that do not require assembly on a shaft of the flapper valve. More particularly, the flapper valve can include a shaft having one or more flap portions and one or more bearing portions molded in place on the shaft as a unitary structure. The bearing portions are separated from adjacent flap portions and/or the shaft thereby forming a bearing that rotates independently of flap portions on the shaft. The flapper valve is mounted to a flapper valve carrier that can include sealing members for facilitating a tight seal between the flapper valve and the carrier and/or the carrier and a manifold.

Abstract: A butterfly valve-type throttle valve 10 includes a valve shaft 12 extending across an intake air passage 5 of an internal combustion engine, and a butterfly-type valve body 14 for adjusting a flow rate of an intake air flowing through the intake air passage 5 by rotating in unison with the valve shaft 12. The valve body 14 is constituted by two split members 20, and is configured such that the split members 20 are coupled to each other by a welding 36, which is a coupling that uses no screw, and such that an axial hole 34 for fitting with the valve shaft 12 is formed through the coupling. A gap closing member 16 is provided on a circumferential edge portion of the valve body 14 for closing a gap between the valve body 14 positioned at a fully closed position and a passage wall surface 5a of the intake air passage 5.

Abstract: A butterfly valve comprises a valve body, a seat ring mounted on a flow passage of the valve body, a disc rotatably mounted to the valve body and configured to open and close the flow passage by being attached to the seat ring; and a driving device configured to linearly move and rotate the disc so as to prevent interference between the disc and the seat ring when the flow passage of the valve body is open and closed.

Abstract: An object of the present invention is to provide a butterfly valve device made of resin, the butterfly valve device being little susceptible the secular change in gas flow (in particular, the minimum flow) or random changes. According to the present invention, when a butterfly valve is located at a full-closed position facing a peripheral lower surface of a semicircular portion with respect to a rotating shaft of the butterfly valve made of a resin material, a partial annular projection is adapted to radially inwardly extend towards an inner wall surface of a fluid path, the partial annular projection including a plane that contacts the peripheral lower surface of the valve to form a fluid seal.

Abstract: A compressor bleed air valve in an auxiliary power unit (“APU”) modulates bleed air flow both for accessory pneumatic systems powered by the bleed air and for reducing or removing surge in the compressor.

Abstract: The shut-off system for large pipe cross-sections comprises a flap housing which is provided with pipe connections, a pivot flap which can be pivoted back and forth therein between two end positions and a drive device having a drive shaft which is connected to the pivot flap by means of a toggle lever system, the drive shaft being constructed in the manner of a lattice tower.

Abstract: A butterfly valve (1) for media under pressure includes a housing (2) having a passage (4) for the medium and a butterfly (6), which is positioned as a shut-off member within the passage (4). The butterfly (6) is pivotable by means of a shaft (10), which is rotatably mounted at two ends and extends transversely through the passage (4), about an axis of rotation (12) in such a manner that, in an open position, it is orientated with its disc plane approximately corresponding to the direction of the passage and in a shut-off position, lying transversely relative to the passage direction, interacts with a sealing seat (16) on the housing so as to provide a circumferential seal.

Abstract: Butterfly valves assemblies are provided that include a flowbody, a butterfly plate, an actuator and an upper chimney and a lower chimney disposed within the flowbody. The flowbody has an inner surface defining a channel. The butterfly plate is disposed in the channel, is rotationally mounted to the flowbody, and has an outer periphery. The actuator has an actuator output shaft that is coupled to the valve shaft via a serrated spline coupling. The upper chimney and the lower chimney are configured to include bearing assemblies that constrain radial loads and thrust loads exerted upon the valve shaft and minimize misalignment of the serrated spline coupling.

Abstract: A valve for adjusting the air flow rate in an internal combustion engine; the valve presents: a valve body; a cylindrical tubular pipe obtained within the valve body and in which an air introduction channel is defined; a valve seat obtained along the air introduction channel of the tubular pipe; an actuation system; a shutter, mobile under the bias of the actuation system; and a connection flange, which is integral with a first end of the tubular pipe and presents a plurality of through holes which are crossed in use by corresponding fastening screws for rigidly fixing the valve body; the connection flange is provided with a lower plate and an upper plate, which are reciprocally parallel, facing and distanced and are arranged radially with respect to the cylindrical tubular pipe, and a number of ribs, which reciprocally connect the plates, are arranged perpendicularly to the plates, and are arranged axially with respect to the cylindrical tubular pipe.

Abstract: A noise suppression wedge for a butterfly valve comprises a wedge-shaped structure having a plurality of fingers and a plurality of slots. The noise suppression wedge is positioned in contact with the butterfly plate and reduces noise by disrupting the flow through the valve.

Abstract: A valve assembly having a body, a valve, a contact surface of the valve, and a gap surface of the valve. The body has an interior surface that defines a flow passage. The valve is positioned in the body. The valve is positioned at an angle with respect to the interior surface of the body when the valve is in a closed position in order to prevent the valve from sticking to the body. The contact surface contacts the interior surface of the body when the valve is in a closed position. The gap surface is spaced apart from the interior surface when the valve is in the closed position.

Abstract: An outflow valve for an aircraft has a frame for arrangement in an opening of an outer shell of the aircraft, a first flap pivotably arranged in the frame for controlling a flow cross-section of at least one first inflow opening and at least one outflow opening. To achieve a simplified construction of the ventilation system of the aircraft, the outflow valve has a second inflow opening configured to be closable by means of a drivable adjustable member.

Abstract: Throttle valves often have the problem that the throttle must be precisely positioned with and fixed to the throttle shaft. In the throttle valve (2) proposed by the invention, hardening filler material (10) is inserted into the intermediate space (22) between the throttle (6) and the throttle shaft (8). After said filler material (10) has hardened, the throttle (6) is precisely positioned relative to the throttle shaft (8) and fixed in a torque-proof manner. The throttle valve may be used for controlling the output of an internal combustion engine.

Abstract: An EGR valve (20) comprises three gear parts (40, 42, 44) that provide a variable ratio drive system through which an electric actuator (34) operates a movable valve element (26). Each of the gear parts (40, 42, 44) is a single unitary part, with one part (42) containing two sets of gear teeth (46, 48) each associating with a set of gear teeth of a respective one of the other two parts. Limit stops (56, 58, 60; 68, 70) are integrally formed in two parts (42, 44).

Abstract: A throttle body (2) includes a resin main body (3) defining a bore (7) through which intake air flows, a valve body (60) having a shaft part (20) rotatably supported by the resin body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3), and a resin cover body (40) attached to the main body (3). The cover body (4) is attached to the main body (3) by welding.

Abstract: An exhaust brake has a body with a passageway for exhaust gases therein. A valve member is movably located within the passageway for selective movement between an open position where the valve member opens the passageway and exhaust gases are free to move through the passageway and a closed position where the valve member blocks the passageway and the passage of exhaust gases through the passageway. The valve member has an aperture therethrough to permit a limited flow of exhaust gases through the aperture when the aperture is open. An exhaust valve actuator mechanism is coupled to the valve member for moving the valve member between the open position and the closed position. A closure member is positioned adjacent to the aperture.

Abstract: A drain valve used on an at least partially dielectric container has a valve housing made of electrically nonconductive plastic, fixed to the container, and forming a passage opening into the container so that fluent contents of the container can flow out of the container through the passage. A valve body formed at least partially of an electrically conductive material is movable in the passage between a closed position blocking flow through the passage and an open position permitting flow through the passage. An actuating element outside the housing is connected to the body for shifting same between its positions.

Abstract: Various exemplary embodiments of a butterfly-type valve that provide a reduction in the unseating torque are disclosed that include a valve body defining a flow passage therein, and a closure disc disposed in the flow passage that has an axis of rotation about which the closure disc rotates between open and closed positions. The valve includes a cylindrical body liner disposed within the valve, which includes a circumferential sealing surface that is engaged by the closure disc to establish a seal when the closure disc is rotated to a closed position. At least one resilient band is at least partially interposed between the valve body and the cylindrical body liner, and at least a portion of the resilient band is tapered to a reduced thickness. The taper reduces the forces associated with the engagement by the closure disc, to thereby reduce the unseating torque required to open the closure disc.

Abstract: A flap (21) having a flap encompassing frame (11) and provided with first (22) and second (26) flap bearings, in which at least one top part of a housing (16) is fixed to the flap frame by a snap-in connection. A support arm (24) pivotable about the flap axis is arranged on the top part of the housing, and at least one front face (31) of the flap axis is brought into contact with a support surface (30) of the support arm, and a slight air gap of the bearing is adjusted between support surface and the front face, thereby assuring a practically play-free axial mounting of the flap.

Abstract: The present invention relates to a valve device (13) for controlling a gas flow in a fresh air system (6) of an internal combustion engine (2), in particular of a motor vehicle, with a housing (17) which encloses at least one duct section (19) through which the gas flow (14) can pass transversely to the main flow direction (18), with at least one flap (15) which can be rotated about an axis of rotation (21) which runs transversely with respect to the main flow direction (18) in the duct section (19). In order to improve the fail-safety of the valve device (13), at least one rotary frame (24) is provided, which can be rotated about an axis of rotation (25) which runs transversely with respect to the main flow direction (18) in the duct section (19) and has a frame opening (26) through which the gas flow (14) can pass.

Abstract: A butterfly valve comprises a valve shaft placed across a flow passage and a plate-like valve element provided on the valve shaft so as to be rotatable about the valve shaft to regulate a flow rate of fluid in the flow passage. The valve element has a section that gradually decreases in thickness from the valve shaft toward an outer edge in a direction nearly perpendicular to the valve shaft. The valve element further includes a plurality of inclined surfaces on each side so that the corresponding inclined surfaces on both sides of the valve element are identical in section in a direction parallel to the valve shaft. The valve element is provided on each side with a plurality of flow straightening ribs each extending in a direction perpendicular to the valve shaft and inclining along each inclined surface.

Abstract: A valve assembly comprises a flow control valve including a valve shaft, an electrical actuator comprising an actuator output shaft, and a torsion spring coupling the valve shaft and the actuator output shaft.

Abstract: A valve assembly may include a valve body, a valve member, and a valve shaft. The valve body may include an inlet, an outlet, and first and second fluid paths in fluid communication with the inlet. The first fluid path may extend axially through at least a portion of the valve body. The second fluid path may be defined by first and second annular walls and may at least partially surround the first fluid path. The valve member is disposed in the valve body and may be movable between a first position preventing fluid flow through the first fluid path and a second position allowing fluid flow through the first fluid path. The valve shaft may be fixed to the valve member and mounted to the valve body for rotation relative to the valve body.

Abstract: A valve assembly comprises a housing (1) defining a conduit (2) through which fluid may flow and a butterfly plate (8) rotatably mounted within the housing (1) so as to control the flow of fluid through the housing; the plate incorporating oppositely located projections which extend beyond the conduit; the plate and projections being of one piece and wherein each of the projections extends beyond said conduit into a respective one of two end recesses (9) located in oppositely facing rotatable shafts (7) so that the plate rotates within the housing together with the rotatable shafts; characterised in that the projections are held in place within the recesses, solely by the interfit between the valve components once the valve is assembled for use (e.g. with no screw of other auxiliary clamping means securing the projections to the shafts).

Abstract: An electronic throttle device includes a throttle body, a bulge, and a ring. The throttle body includes a bore part having an approximately cylindrical shape. The bore part is connected to an upstream air hose such that the upstream air hose is located on an outside of the bore part and is fastened with a fastening member from an outside of the upstream air hose. The bulge is discontinuously located along an outer circumference of the bore part and has a groove along an outer circumference of the bulge. The ring has a cross-sectional dimension larger than a depth of the groove in a radial direction of the bore part, and is located into the groove to configurate a protruding part that protrudes radially outwardly and extends entirely on the outer circumference of the bore part.

Abstract: An apparatus is provided for a valve actuator assembly comprising an actuator housing, a piston, and a spring. The piston is disposed within the actuator housing. The piston is configured to couple to a valve element, and includes an inner cylindrical section and an outer cylindrical section. The outer cylindrical section of the piston is spaced apart from the inner cylindrical section to define a recess. The piston is further configured to move within the actuator housing in a first direction and a second direction, to thereby move the valve element toward a first position and a second position, respectively. The spring is disposed within the actuator housing, and is configured to supply a bias force that urges the piston to move in the first direction. The spring is at least partially disposed within the recess, and at least partially surrounding the inner cylindrical section.

Abstract: An throttle body for rotating a valve shaft of an air-intake throttle valve through a decelerating mechanism by a motor and change the opening area of an air-intake passage by rotating the valve shaft is equipped with a lever portion that is disposed so as to be interlocked with the decelerating mechanism and regulates the opening degree of the air-intake throttle valve under the full-open state, and an adjusting screw that is threadably inserted from the outside of the body portion and abuts against the lever portion in the body portion to change the opening degree of the air-intake throttle valve under the full-open state.

Abstract: A plastic outlet valve for containers for liquids has a valve housing having an inlet socket and a union nut for securing the inlet socket on an outlet socket of a container. An anti-twist device in the form of an outer annular cam arrangement with locking cams is arranged on the inlet socket of the valve housing. The locking cams interlock with locking cams of an inner annular cam arrangement of the outlet socket of the container. As an alternative, an adapter ring with inner and outer locking cams is provided. The adapter ring is slipped onto the insertion end of the inlet socket of the valve housing. The inner locking cams engage matching external longitudinal grooves of the inlet socket of the valve housing, and the outer locking cams engage matching inner longitudinal grooves provided on the outlet socket of the container.

Abstract: A valve system includes a conduit having a flow of fluid therethrough, and a butterfly valve assembly. The butterfly valve assembly includes a shaft extending obliquely within the conduit, a butterfly disk, and a first bearing assembly positioned on an external surface of the conduit. The butterfly disk includes a passage sized to receive the shaft therethrough, wherein the butterfly disk is operable to restrict the fluid flow through the conduit when the butterfly valve assembly is in the closed position. The first bearing assembly is configured to receive a first end of the shaft therethough, wherein the first bearing assembly includes a plurality of tapered roller bearings circumferentially-spaced within a bearing race and configured to maintain the butterfly disk at a substantially constant axial position when the butterfly valve assembly is in the closed position.

Abstract: Collets for coupling rotary actuators to valves are disclosed. An example collet includes a plurality of flexible members configured to be coupled to an elongated member and each having an inner surface that forms at least a portion of a substantially rectangular bore configured to receive a rectangular shaft. The plurality of flexible members form an involute outer surface for engaging an involute inner surface of an opening of a lever. The opening of the lever is configured to cause the plurality of flexible members to be displaced toward an axis of the elongated member to cause the inner surface of each of the plurality of flexible members to engage one or more surfaces of the rectangular shaft.

Abstract: A wafer-style valve assembly adapted to be coupled between opposing pipeline components having a common centerline secured together by a plurality of longitudinal fasteners includes a substantially cylindrical valve body, a seat retaining plate, and at least one clip. The valve body has a peripheral edge portion and an axial end surface. The seat retaining plate is disposed on the axial end surface. The at least one clip is also disposed on the axial end surface and extends radially outward of the peripheral edge portion. The clip has a radially inward portion and a radially outward portion. The radially inward portion secures the seat retaining plate to the to valve body. The radially outward portion has an edge defining a first recess and a second recess. The first and second recesses are each adapted to accommodate a longitudinal fastener to locate the valve assembly relative to the centerline of the pipeline.

Abstract: The present invention relates to a method for the production of flap mechanisms in air distribution pipes of combustion engines, wherein the flap mechanisms essentially comprise a frame and a flap rotatably mounted within the frame. To fulfill the demands in regard to the tolerances of the components, the frame and the flap is molded with an injection molding tool out of the same material, such that the flap is placed securely into the frame after the injection molding process. In a further operation, bearings are inserted between frame and bearings.

Abstract: Provided is a throttle valve device for an internal combustion engine which is favorably protected from icing, and enables a favorable control of the intake flow rate by avoiding an abrupt increase in the flow rate particularly in a small opening angle range. An upstream recess (21) and a downstream recess (22) are formed in a lower part of the throttle bore (11) of the throttle valve device. Moisture that may deposit on the inner wall of the throttle bore is allowed to be drained to the recesses. A cross sectional area of one of the recesses over which the lower edge of the throttle valve member sweeps as the throttle valve member (30) opens from the fully closed position is smaller than that of the other recess so that an abrupt change in the intake flow rate can be avoided in a small opening angle region.

Abstract: A butterfly valve including a housing having a hollow passage defining a flow path and a shaft mounted to the housing and extending transversely across the flow path. The shaft defines an axis of rotation for a butterfly valve element carried on the shaft. The valve element can be rotated about the axis between an open position permitting flow along the flow path and a closed position restricting flow along the flow path. The butterfly valve element includes a thin, substantially disc-shaped, flow-regulating plate having front and rear faces and a flow-straightening vane extending from one of the faces transversely relative to the shaft. The vane is solid and extends substantially to the wall of the hollow passage thereby defining separate non-communicating flow channels on opposite sides thereof for reducing flow turbulence and for straightening and accelerating flow across the plate.

Abstract: A butterfly valve comprises a housing defining a fluid flow conduit and a butterfly valve member supported on a shaft for rotation about an axis extending across said conduit to control fluid flow through said conduit. A portion of the shaft extends into a shaft bore provided in the housing and which extends laterally from said conduit. An annular bush is located around the shaft within the bore and is coupled to the butterfly valve member for rotation therewith about the shaft axis.

Abstract: An engine intake system is provided that includes a sensor unit (16) formed by mounting a throttle sensor (18) and a negative pressure sensor (20) on a sensor housing (17) mounted on a mounting face (15) on one side of a throttle body (1), and a negative pressure transmission path (35) providing communication between an intake path (2) and the negative pressure sensor (20) is formed in a crank shape from a first passage (35a) having one end opening on a peripheral face of an upper half of the intake path (2) in proximity to a horizontal plane (H) containing the axis of the intake path (2), a groove-shaped second passage (35b) formed between mating faces of the throttle body (1) and the sensor housing (17) so as to extend while bending upward from the other end of the first passage (35a) at substantially right angles, and a third passage (35c) formed in the throttle body (1) so as to extend from the upper end of the second passage (35b) in a direction opposite to the first passage (35a) and reach the negative

Abstract: A valve shaft support structure is closed to improve its durability, lower its manufacturing cost and improve its quality, in which a valve shaft interposed between runners is formed as an eccentric shaft integrally formed with a valve. A valve and a valve shaft are formed in a body to support the valve. An eccentric circular protrusion is formed in a center portion of the valve shaft, and divided manifold bodies support the eccentric circular protrusion. The valve shaft and the manifold bodies are repeatedly in contact or non-contact with each other when the valve is opened or closed.

Abstract: A valve for a combustion engine air intake circuit, where the valve includes a main pipe and a bypass duct with upstream and downstream ends opening into the main pipe. The valve also includes a heating member that is positioned in the bypass duct and a shut-off member mounted such that it can move between a first position in which airflow can pass through the main pipe and a second position in which airflow can pass through the bypass duct.

Abstract: The present invention relates to a switching valve (1) for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle, comprising a line section (2) for installation in the gas line, an actuator drive (3) for rotational adjustment of a butterfly valve (11) about an axis of rotation (13) running across the direction of flow inside the line section (2). In the closed position of the butterfly valve (11) a throttle sealing gap (17) is formed radially between a butterfly valve edge (16) and a sealing surface (14) facing the butterfly valve (11) and belonging to a sealing section encompassing the butterfly valve (11) along the butterfly valve edge (16) in the circumferential direction. To simplify the manufacture of a high quality throttle sealing gap (17), the sealing section may be formed by a sealing body (15) which is manufactured separately from the other line section (2) and can be added directly onto the line section (2).

Abstract: A butterfly valve includes a main body and a valve plate. The main body is provided with a valve port and a handle fixed with a shaft for connecting a handle with the valve plate that is received in the valve port of the main body. Before the valve plate is shaped, a sealing ring is deposited in the shaping cavity of a valve plate shaping mold, and after the valve plate is shaped, the sealing ring will be secured at the periphery of the valve face for achieving sealing effect and preventing liquid from leaking when the valve plate is closed. Further, the valve face has one side bored with a shaft hole at a location eccentric to the center of the valve face. Thus, when the handle is operated, the valve plate can be turned to open or close smoothly.

Abstract: The invention relates to a shut-off device comprising a housing which is to be connected to an adjacent conduit in a pressure-tight manner A tubular passage is defined in the housing for a medium flowing through the conduit. Said device also comprises at least one sealing body which can be displaced by an articulated mechanism, by means of an adjusting drive that can be moved vertically in relation to the direction of flow, from an open position into a closed position in which the sealing contour of the at least one sealing body comes into contact with the tubular passage in a radially sealing manner. The articulated mechanism is guided parallel to the direction of displacement of the adjusting drive and comprises a bearing body to which the at least one sealing body is pivotably applied.

Abstract: A throttle valve of the invention includes a clearance closing member provided along a peripheral edge of a valve body displaceably and elastically deformable in a direction extending along an axis of an intake passage, a direction perpendicular to the axis of the intake passage, and a direction inclined with respect to the axis of the intake passage, for closing a clearance between the peripheral edge of the valve body and an inner wall surface of the intake passage.

Abstract: A flapper valve and a method of making the same that does not require bearing assembly. More particularly, the flapper valve includes a shaft having one or more flap portions and one or more bearing portions molded in place on the shaft as a unitary structure. The bearing portions are separated from adjacent flap portions and/or the shaft thereby forming a bearing that rotates independently of flap portions on the shaft. Accordingly, the flapper valve with mold-in-place bearings does not require bearings to be separately assembled or installed prior to installation of the valve.

Abstract: A butterfly-type valve for controlling toner material flow to a toner container, including, a valve plate which is pivotally disposed in an elongate flow path defined by a passage way, wherein the valve plate is pivotal from a closed position which substantially closes a fluid communication along the path to an open position which maximally permitting fluid communication along the path, a gap area defined between the valve plate and the passage way when the valve plate is in the closed position which allows minimum toner material flow therethrough without compressing the toner material, and a pump for supplying air to the gap area when the valve plate is in the closed position to stop the minimum toner material flow.

Abstract: A method enables a gas turbine engine to be operated. The method includes directing fluid flow from a source into an inlet of a valve, channeling the fluid flow entering an inlet portion of the valve towards an outlet portion of the valve such that a direction of the fluid flow is changed within the inlet portion, and controlling the amount of fluid flow entering the outlet portion of the valve by selectively positioning a valve disk coupled within the inlet portion of the valve by a valve disk axle. The method also comprises channeling the fluid flow from the inlet portion of the valve through the outlet portion of the valve and into a fluid supply pipe, wherein the valve outlet portion has a substantially right cylindrical shape such that a direction of fluid entering the body outlet portion remains substantially constant therethrough.