Abstract: A flow control device comprising a spindle having a disk at its lower end and a handle at its upper end and spring-biased to bring the disk into pressing contact with a disk seat within a case, a closure having a top wall, and at least one rollable member resting on the upper surface of the closure top wall and mounted on the spindle at an upper end portion thereof projecting upward from the upper surface of the closure top wall. The closure is formed in the upper surface of its top wall with a lower recessed portion for the rollable member to partly fit in, an upper recessed portion for the rollable member to partly fit in and a slanting guide face between the two recessed portions. The rollable member is movable by the rotation of the handle to partly fit into the lower recessed portion to thereby hold the disk in pressing contact with the disk seat or to partly fit into the upper recessed portion to thereby hold the disk away from the disk seat.

Abstract: A flue restrictor to control air flow in a combustion apparatus having an exhaust system that includes a flue. The restrictor has a housing to be attached in the flue. There is a first valve member located in the housing and a second valve member located in the housing. Each valve member is composed of open and closed areas, and cooperates with the other valve member to act as a valve. Movement of one valve member relative to the other controls air flow in the restrictor, and thus in the combustion apparatus. The restrictor provides sensitive control and ease of adjustment in position.

Abstract: A two-stage flow controller for use in a vehicle heating circuit including a housing defining an inlet and an outlet and a flow control chamber disposed between the inlet and outlet. A spring biased flow controller is disposed for sliding movement within the chamber towards and away from a valve seat. The flow controller includes an annular segment defining a through aperture and a plurality of axially extending legs which support the segment for sliding movement within the chamber and in predetermined alignment with the valve seat. Projections are defined on a face of the annular segment. When the fluid flow exceeds a predetermined level, the projections initially engage a valve seat surface such that a variable orifice is formed by clearance regions between a confronting face of the element and the seat. The element deforms to diminish the clearance space between the face and the seat as a function of fluid flow rate.

Abstract: A flow-regulated drip emitter, including a housing provided with an inlet connector connectable into a relatively high-pressure liquid-line and an outlet opening, a flexible diaphragm retained along a peripheral portion thereof in the housing and dividing the interior of the housing into an inlet chamber and an outlet chamber, a flow-regulating valve comprised of a valve head accessible to the high pressure and a valve stem one end of which is attached to the valve head. The emitter further includes at least one flow-attenuating element disposed in the path of the liquid flowing from the inlet chamber into the outlet chamber, a valve seat associated with the valve head and located in a high-pressure region upstream of the inlet chamber, the valve seat and the valve head defining between them a gap through which the liquid passes on its way from the high-pressure line into the inlet chamber.

Abstract: An apparatus for the control of velocity and pressure of hot gases flowing through a conduit wherein generally spherically shaped objects of refractory material are disposed within such conduit during the operation thereof to provide a constriction of the cross-sectional area of the conduit through which the gases are flowing. A particular embodiment of the apparatus employed in the present invention comprises a pair of generally spherically shaped refractory objects secured together by means of a length of flexible steel cable.

Abstract: In a setting member for controlling the quantitative flow of a fluid, particularly for the regulating of the idling speed of an internal combustion engine, having an electromagnet and an armature which is movable by the electromagnet in opposition to the force of a spring, a first hollow space to which the fluid can be fed and a second hollow space from which the fluid can be removed are connected to each other by a constriction through which a piston attached to the armature passes upon movement between a position in current-less state and the greatest deflection of the armature. In the case of the failure of the current fed to the electromagnet a medium quantity of flow is established.

Abstract: A flow controller apparatus having few moving parts that may be inserted directly into a flow line to be responsive to flow pressure and maintain the flow rate constant. The flow controller consists of a tubular frame section having an internal bore that is a revolutional chamber having a maximum cross-sectional diameter at the inlet end and tapering, either linearly or non-linearly, toward a minimum cross-sectional area across a throat portion. A control rod and differential pressure plate supported axially movably in said chamber is spring biased toward the inlet end of the chamber, and is movable in response to upstream flow pressure to adjust the cross-sectional fluid flow area to maintain a constant flow rate.

Abstract: A water saving device is provided in the form of a plastic compressable flow control tube with a pinch clamp which may be installed as a substitute for the refill tube for the toilet bowel of a water closet, and which may be adjusted to establish the proper amount of refill water to flow into the toilet bowl after each flush so as to avoid wastage.

Abstract: A two function tank valve according to this invention includes a vertically oriented supply tube or conduit with an upper opening. A valve seat surrounds the opening, and a valve seal is movable against it and away from it. Water level responsive means determines this valve setting so the valve can be opened to fill the tank, and can be closed when the tank is full.

Abstract: A flow selector device whose fluid flow is regulated by the rotational setting of a rotor body in a housing; and a split retainer form of an abutment, releasably held between opposed abutments of the rotor body and the housing body, serves to restrain the rotor body against movement axially of the housing as otherwise would be urged by the axial force result of the actuation of a spring pressed rotor-indexing detent feature and of a sealing feature, both of which are carried by the housing and have an effect of pushing the rotor body axially of the housing due to their compressive nature.

Abstract: A flow regulator is disclosed having a body with a central bore and a dished shaped surface with a tapered groove from the bore to the periphery, a diaphragm is fastened to the periphery of the body with a passage extending around the periphery providing fluid communication between the upstream side of the diaphragm and the tapered groove, a spring is provided to bias the diaphragm towards the upstream side, the diaphragm is inelastically deformable against the dish shaped surface solely in accordance with the resistance to deformation of the spring and the fluid pressure on the upstream side of diaphragm to regulate the volume flow of fluid through the central bore.

Abstract: A valve arrangement for regulating the idling speed of internal combustion engines by controlling the quantity of air on the intake side of an intake manifold 1 leading to the internal combustion engine. The valve arrangement has an electromechanical control member which has a solenoid 7 by which a closure member 4 can be moved, via a control element, in opposition to the force of a return spring 8. The closure member 4 is movable relative to the control element between a position of rest and an operating position and, in the position of rest, is in a well-defined partially open position of the valve passage.

Abstract: A hydrocarbon vapor recovery storage system including a charcoal canister for storing hydrocarbon vapor and a control valve for establishing the rate of flow of the vapor into the intake manifold of an engine. The system further includes a regulator (30) comprising an inlet passage (52,54) for receiving the vapor from the canister and an outlet passage for communicating the vapor to the control valve (22). The regulator further includes a device for regulating the maximum flow rate of the vapor comprising a piston (120) movable relative to a control orifice (64) to regulate the flow therethrough. The piston (120) is movable by a material, such as a silicon rubber compound that is capable of changing its physical size in accordance with the concentration of hydrocarbons in the vapor communicated thereto.

Abstract: The present invention concerns a way and a means for rendering equal the effect of gravity independent of the mode of installation in flow regulators for gaseous substances, particularly for air in air-conditioning and ventilation installations, and for maintaining the volumetric flow of the gaseous substance at desired magnitude with sufficient accuracy when the differential pressure acting across the flow regulator varies within given limits. The flow regulator comprises an envelope and a regulating member turnably disposed in the flow passage confined by the envelope. The torque produced by the flow of gaseous substance on the regulating member and on the other hand a countertorque dependent on the position of the regulating member cause the regulating member turning in the flow passage to assume a position of equilibrium such that the requisite pressure drop is obtained for maintaining the volumetric flow rate at predetermined magnitude. The regulating member is first balanced, e.g.

Abstract: A flow regulator for drip infusion, comprising a rigid main body in which a rigid flow path is integrally formed. The flow path is substantially omega-shaped, and has a V-shaped cross section in its middle section, of which the upper side is open and closed by a flexible disc which has a ridge extending perpendicular to the flow path and can be pressed to change the effective size of an orifice formed between the ridge and the V-shaped flow path, thereby allowing for a stable control of the flow rate.

Abstract: The present invention relates to a variable orifice device for modulating a clutch oil pressure of a power transmission. The device includes a body member having a pocket and a first and a second port. The pocket is open to one side of the body member with the first port connecting the pocket to an oil pump and the second port connecting the pocket to a modulator valve device. A plate member is arranged in the pocket and has a passage and a plurality of orifices. Each of the orifices has a different diameter. A selected one of the orifices communicates with the second port and the passage communicates with the first port. A cover member is arranged in the pocket and has a recess for connecting the passage to the selected one of the orifices.

Abstract: A silencer attached to a toilet cistern float valve or the like includes damping elements disposed between two cavities with ports communicating between the two cavities. A cylinder beneath a lower one of the two cavities communicates therewith through an apertured partition wall while the lower cavity includes a water outlet disposed at a level above that of the ports leading to the lower cavity to eliminate any air gap during refilling of the cistern. After refilling, water in the lower cavity drains through the apertured partition wall into the cylinder, the latter of which includes a bottom opening providing a siphon-breaking air gap.

Abstract: A flow regulator for use in medical apparatus for adjusting the flow of fluid in which there is a valve body with a valve member having a helical flow passage through which the fluid must flow. In order to facilitate quick adjustment of the fluid, the pitch and depth of the groove both progressively change from one end of the flow regulating device to the other, the depth of the groove becoming less as the pitch of the groove becomes finer. The valve member is longitudinally movable with respect to the valve body, and provision is made for adjusting the longitudinal position either by rotation of a threaded valve stem or by longitudinal movement of the valve stem to quickly adjust the flow rate. The helical groove may be either rectangular in cross-section, or V-shaped in cross-section. Suitable means are provided for sealing against leakage through the valve adjusting means.

Abstract: A constant airflow control apparatus is connected to an air duct of an air conditioning system to keep the flow rate of air fed from the air duct constant. The apparatus comprises a rectangular pressure receiving plate slidably mounted on a guide shaft extending in one direction inside a passage of a housing. The plate extends substantially at right angles to the central axis of the housing so as to block part of the cross section of the passage. The apparatus further comprises a coil spring for urging the plate against the flow of the air, and two swinging plates swingably attached to two opposite side edges of the pressure receiving plate, individually. The swinging plates are adapted to change the cross-section area of an air passage defined between the swinging plates and the inner surface of the housing in a mode represented by a quadratic curve in accordance with a rectilinear change of the pressure of the air.

Abstract: A control stop for a flushing system including a metering flush valve connected to supply liquid to a toilet fixture. The control stop is in series flow relation between a source of pressurized liquid and the metering flush valve and serves the several functions of controlling flow to the metering flush valve for reducing noise and maintaining desired flushing action, preventing reverse flow and trapping pressure at the metering flush valve in the event of loss of inlet pressure, and shutting off the flow path for installation, service or replacement of the metering flush valve. The control stop includes a regulator having a valving portion engageable with a valve seat communicating with the outlet of the control stop and acts as a low pressure cut-off rather than a check valve. A spring biases the regulator toward the valve seat and the regulator is normally held open by liquid pressure.

Abstract: Vanes operatively attached to external sleeves are provided in a conduit to implement on the outside of the conduit change in the swirl angle of incoming fluids.

Abstract: A pressure compensated emitter for irrigation systems and the like includes a generally tubular hard plastic support body for mounting in a port or opening in an irrigation line with a flexible tubular flow control member mounted within the housing with a seal end sealingly engaging a seat in the outlet end of the housing with an inlet port extending toward the inlet opening in the housing with the flow control device being a flexible tubular member having an inlet section of a generally teardrop cross-sectional configuration of a first diameter and a tubular barrel of a second diameter of a generally cylindrical tubular cross section with the inlet section responsive to a first range of pressures and the barrel section responsive to a second range of pressures for regulating and maintaining a substantially uniform flow rate over a range of pressures.

Abstract: Gas mixing and flow smoothing apparatus for use in for example an anaesthesia system comprises a mixing chamber (8) which receives the flow of two or more gases via control valves (6,7). The mixing chamber (8) is adapted to absorb fluctuations in the pressure of the gases therein through the provision of for example a spring-loaded piston (not shown) which forms one wall of the chamber, and the pressure at the outlet (30) from the chamber (8) is maintained at a substantially constant pressure by means of a valve (9). If desired, further attenuation of the gas flow may be achieved through the provision of a second series arrangement of surge damper (11) and back pressure valve (10) located downstream from the valve (9).

Abstract: An adjustable slow closing valve assembly includes a valve body having a bore to receive a valve cartridge with inlet and outlet ports communicating with the bore, the valve cartridge having a tubular retainer providing means defining a valve seat and means reciprocably mounting a valve stem with the stem carrying an operating handle at one end and a valve member adjacent the other end to cooperate with the seat.

Abstract: A flow regulator comprises a sleeve fixed within a body member and formed with an opening serving as a metering passageway, a second sleeve displaceable with respect to the fixed sleeve so as to vary the effective size of the metering passageway, a spring biasing the displaceable sleeve in the direction to enlarge the met metering passageway, and a flow sensor element carried by the displaceable sleeve and impinged by the flowing fluid so as to displace the second sleeve in the direction of restricting the metering passageway. Also described is a spray nozzle including the above flow regulator, and a deflector floatingly mounted so as to be impinged by the jet issuing from the spray nozzle.

Abstract: An inflatable plug adapted to be inserted into a pipe and inflated so as to plug the pipe and form a water tight seal. The inflatable plug is comprised of an inflatable bag of flexible sheet material forming an elongated cylinder having opposite ends. The material at the opposite ends of the cylinder is pleated or folded and wrapped around cylinders. Metal collars are placed over the folded material and swaged so as to clamp the material in fluid tight relation against the cylinders.

Abstract: A liquid flow regulator has a housing formed by two parts that snap together. The housing defines an axial bore, an inlet, an outlet and a plurality of axial grooves opening endwise of the inlet and laterally of the housing into the bore. The grooves taper axially so that the cross-sectional area of each groove gradually decreases from the inlet to nothing at a pont where the groove merges with the bore. The grooves have different axial lengths. An elastomeric sock fits within the bore. Means for expanding the sock radially outward into sealing engagement with the housing adjacent the bore is axially movable within the bore. Flow through the grooves and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial grooves at the axial location where the sock seals the bore. Axial adjustment of the sock expanding means sequentially opens and closes passage from the grooves through the bore to the bore outlet.

Abstract: Apparatus for supplying gas under pressure and distributing it between a plurality, n, of outlets (15) comprises a piston (1) slidably mounted in a cylinder (2), with the piston (1) being fixed to a rod (6) which serves to position the piston in the cylinder, and with the cylinder including a base (3) provided with a gas inlet (16) and a side wall (5) having n openings, each of which is connected to a corresponding gas outlet; said piston, when in a base end postion, serving to block communication between the inlet and the outlets; the improvement wherein the openings in the side wall are constituted by grooves (13) which extend over a shorter length than the axial extent of the piston, and whose depth in the thickness of the wall increases with distance from said base, the furthest end of each groove from said base being connected to an associated gas outlet, and each groove constituting together with the piston a convergent-divergent nozzle.

Abstract: A valve device to control fluid through a passageway under a pressure head which may vary, has at least one vane which lies in the passageway to restrict the fluid flow. The vane is effectively flexible and resilient to deflect under fluid flow and so increase its restricting effect on increase in the pressure head and decrease its restricting effect on decrease in the pressure head so as to maintain a substantially constant flow output through the passageway.The valve device may be incorporated in a nozzle for insertion as one of a series along the length of an irrigation pipe, and the nozzle may be provided with a pointed head part and an outlet tube or cap.The device also has application in other forms of fluid control.

Abstract: A wall hydrant is described herein comprising a hollow tube having an inlet end and outlet end. The inlet end is adapted to be connected to a source of fluid under pressure and has a valve means adjacent its inlet end. The inlet valve means comprises a cylindrical body portion having an inward end terminating in an arcuate nose portion. A plurality of spaced apart tab elements extend outwardly from the body portion and bear against the inward surface of the hollow tube. A longitudinally extending groove is located on the outer surface of the body portion. A valve seat portion is provided in the inlet end of the tube. A valve control rod is connected to the valve means and extends through the opposite end of the hollow tube to permit remote control of the valve means and to selectively permit the valve means to slide inwardly to a closed position on said tabs, and outwardly to an open position. A drain valve is positioned on the rod and bears on a second valve seat portion when the valve means is open.

Abstract: The invention relates to a flow regulator in which a diaphragm of elastically deformable material is disposed between a pressure chamber at supply pressure and an end face of a base member having open radially extending grooves. A supply passage extends from the regulator inlet circumferentially around the diaphragm into fluid communication with the grooves and a discharge passage is axially disposed in the base member in fluid communication with the radially inward ends of the grooves. Pressure variations in the supply passage cause the diaphragm to cover varying lengths of the grooves to vary the throttling effects of the grooves. The regulator is adapted for different ranges of flow quantities by providing two or more grooves in the face of the base member and by providing valving apparatus for selectively connecting one or more of the grooves to the supply passage.

Abstract: A double disc variable orifice valve is provided for fluid solids service in a petroleum process conduit wherein each disc thereof is provided with a plurality of equally spaced and equally sized apertures extending therethrough. One of the discs of the valve is fixed relative to the surrounding valve conduit. Adjacent to the fixed orifice disc or plate, there is provided an adjustable orifice plate having a similar number of sized and spaced orifices. The adjustable orifice plate is supported at its center from the fixed orifice plate in a pivotal mounting arrangement which may include a central fixed aperture.

Abstract: A polyjet valve has an inlet opening into an inlet chamber normally communicating through a movable polyjet sleeve in variable amounts and in one direction with an outlet chamber having an outlet. There is a block to close the outlet and a conduit to establish backflow from the outlet chamber through the polyjet sleeve in the reverse direction and then to waste.

Abstract: A fluid system is disclosed having a passage with a reduced diameter orifice. A wire extends into the orifice and is reciprocated therein to simultaneously clean and meter a predetermined fluid flow through the orifice. Automatic reciprocating movement of the wire is accomplished by differential pressures acting on the wire on opposite sides of the orifice.

Abstract: A valve is described having a ridge extending along a flat surface having holes therein and a base of elastic material compressed against the ridge and flat surface so as to define a channel of small cross-section communicating between the openings. A tab is connected to the side of the base of elastic material that is remote from the ridge and the flat surface so that a pull on the tab pulls the base away from the flat surface and enlarges the cross-section of the channel.

Abstract: YA flow proportioning control for proportioning flow from a water level sensing valve. A barrier is positioned downstream from the valve adjacent to a refill line. A restrictor ring is positioned on said barrier with a portion overlying the upper surface of the refill line. It is interchangeable so that by substituting rings of various sizes, various proportions of flow can be selected.

Abstract: An anti-surge valve for installation in a cylindrical chamber permits a fluid to flow at low velocity into and out of a port that opens into the cylindrical chamber and is located on the concave wall of the cylindrical chamber, the valve preventing a high velocity flow of the fluid from the cylindrical chamber into the port. The valve includes a sealing tube that is positioned within the cylindrical chamber in juxtaposition with the port and coaxial with but spaced radially inward from the portions of the concave wall that surround the port. The sealing tube is maintained in this position by spacers surrounding the sealing tube and extending radially outwardly to the inner surface of the cylindrical chamber. The anti-surge valve is a unitary structure molded of rubber.

Abstract: A hot-water safety valve for preventing scalding of children and invalids when cold water supply to a mixing valve for a shower is interrupted, includes a thermostatic cup freely resting on a perforate transverse platform in a supply pipe upstream from a shower nozzle when the water temperature exceeds a predetermined amount the thermostatic cup expands to constrict flow but always leaves a drip to permit flow of cooler water to be sensed and reset or re-open the valve for flow restoration.

Abstract: An adjustable slotted orifice assembly for controlling the feed rate and dispersion pattern of high pressure impinging liquid reaction injection molding materials. In a preferred embodiment vibration of the variable orifice, opening particularly useful with low through puts, provides improved results.

Abstract: The invention relates to an ancillary throttle (2) for gas bearings (1) which are exposed to such varying operational load conditions (F) as to change the magnitude of bearing clearance (S). The throttle (2) stabilizes the bearing clearance (S) by using the load-dependent internal pressure of the bearing (1) to regulate the cross section of the throttle.Inlet (13) and outlet (14) of the ancillary throttle are separated by a membrane (6) which displaceably carries an insert (9) having a slightly conical bore, and the insert (9) is adjustably preloaded by a spring (10).A pin (8), also conical, extends through the bore and coacts with the bore to establish a throttle path of variable cross section. The conical pin (8) is axially displaceable in order to adjust the flow of gas.

Abstract: An apparatus and process for restricting fluid flow in a pipeline. An improved inflatable sleeve flow restricting apparatus is disclosed which in one embodiment has restrictor arms extending from one or both ends of the flow restrictor cartridge for engagement with the pipeline side wall at their other ends restricting the inflation of the inflatable sleeve thereby allowing inflation to greater inflation fluid pressures providing pipeline fluid flow restriction in pipelines having pressures of up to about 125 psig. A combination boring-insertion tool is described which utilizes fluid pressure to provide force for the hole cutter.

Abstract: Single tube vehicle suspension strut with built-in shock absorber in which the piston rod is formed from tubing that provides a reservoir for shock absorber fluids and further featuring this type piston valving with the deflecting spring discs and cooperating metering pin construction which can readily reduce high pressure build-up and which can be adjusted to provide ride and level control. This unit can be used to provide a leveling feature with the gas spring in the piston tube operatively connected to suitable controls for pressurized gas and exhaust.

Abstract: A nozzle/valve device for a ducted rocket motor is provided. The nozzle/valve device employs a design in which a nozzle throat blockage element can be moved by rotational motion into and out of the nozzle throat section of the device. The blockage element is designed so that in the closed position the nozzle throat has a minimum cross-sectional flow area and therefore the nozzle throat is never fully closed. The seals employed in the nozzle/valve device are isolated from contact with reaction products of the gas generator and effective use of minimum amounts of erosion resistant materials is achieved.

Abstract: A reinforced expandable resilient plug for a flow regulator is disclosed, and the preferred and illustrated embodiment thereof incorporates a multiply wrap, each ply being independent of the other plies and coextensive with the outer surface of the plug to provide strength. Each ply is formed of lengthwise, nonyieldable fibers, and the several fibers which form a ply are collectively joined together into a sheath of yieldable, stretchable material. Each ply is, therefore, able to stretch in a dimension enabling the plug to expand while lengthwise elongation of each fiber prevents expansion in that dimension. This assists in maintaining the shape of the inner plug.

Abstract: This invention relates to a constant flow control valve comprising a main flow passage whose area is variable by fluctuation of a fluid dynamic pressure, thus permitting a constant flow rate and a by-pass passage which is mounted along an external periphery of the main flow passage, has a by-pass valve opening whose area can be varied as the area of the main flow passage is varied, and is closed and sealed, thus being made to be unusable as necessary.

Abstract: A fluid timing element, comprising a nozzle, a needle being at least partly insertable into the nozzle forming a choke gap therebetween, at least one of the nozzle and the needle being axially tapered, the nozzle and the needle being axially movable relative to each other for adjusting the choke gap, the nozzle and the needle having different cross-sectional shapes and having at least two wall sections distributed over the peripheries thereof projecting into and constricting the choke gap.

Abstract: A multiple orifice flow control valve has a set of similar disks mounted in the body of the valve. A downstream disk is mounted in a fixed position in the valve body and an upstream disk is rotatable in the valve body in concentric face-to-face engagement with the downstream disk. There are two holes in the downstream disk and two holes in the upstream disk for control of the flow of fluids through the valve. The two holes in each disk are at non-adjacent apexes of a regular pentagon. By rotating the upstream disk 72.degree. in one direction the valve changes from closed to one-half open. By rotating the upstream disk through the same angle in the opposite direction, the valve changes from closed to fully open.

Abstract: Disclosed is a liquid metering valve unit, particularly for water. The unit uses a dash-pot mechanism filled with metering liquid such as water, silicone oil or a mixture of water and glycerine. The dash-pot mechanism is a closed system. The unit comprises a sleeve member having an axial bore and a transverse bore communicating with the axial bore. One end of the axial bore connects to a liquid supply and the transverse bore connects to an outlet. A valve stem in the axial bore is slidable between an open position and a closed position in which a resilient seat washer seals the end of the axial bore. A spring biasses the stem toward the closed position and the stem can be manually moved to the open position. Movement of the stem to the closed position is controlled by a dash-pot mechanism or regulating means comprising a cup washer secured to the stem and disposed within a liquid-filled chamber betwen the stem and sleeve.

Abstract: A flexible duct for conveying a gaseous flow, with the duct useable as the flexible nozzle in a wind tunnel. The duct includes a flexible plate member which is attached at the downstream end to a frame support member, with the upstream end of the flexible plate member being slideable and pivotable upon a member attached to the frame support member. A plurality of swing link members in spaced-apart relationship are pivotally connected at one end to the flexible plate member, and pivotally connected at the other end to a translatable and rotatable cradle-like member which is supported by crank members from the frame support member. An actuator is used to selectively move the cradle-like member. The resultant movement of the cradle-like member causes the flexible plate member to deflect, resulting in predetermined contours (and profiles) of the flexible plate member.

Abstract: A cylindrical valve trim has holes in the valve trim wall that provide a fluid flow path through the valve. The holes pass through the wall at predetermined angles to create a plurality of counter-rotating vortices with parallel axes normal to the wall.