Abstract: At the time of expansion and accompanying kinetic degradation of a flowing stream of fluid, the flow is stabilized by forming at least two contiguous flow streams which consist of the same fluid but have a different velocity distribution and the two streams are then mixed. When applying the method to a valve provided with a so-called "hemispherical" closure member for compressible fluids, subsonic discharge nozzles are formed by cutting recesses in the valve seat downstream of the zone in which the valve closure member bears on the valve seat in the closed position. The subsonic discharge nozzles are disposed in alternate sequence with supersonic discharge nozzles formed by the opposite surfaces of the valve closure member and of the valve seat outside the recesses. When the method is applied to a multi-bore pressure reducer for compressible gases, a pressure-reducing plate is provided with low-discharge ducts in adjacent relation to high-discharge ducts.

Abstract: Disclosed is a valve trim design for use in reducing valve cavitation. Valve and seat are axially movable and have frustoconical facing surfaces which form an annulus therebetween to control flow. The seat has an external frustoconical surface and a plurality of pairs of ports communicating with an internal bore. The ports are aligned so that flow from the ports impinge upon each other within the interior chamber of the valve seat to reduce cavitation.

Abstract: The invention relates to a gas flowrate adjustment and limitation device for a liquefied-gas lighter of the type having at least one compressible element traversed by the gas, and means of compressing this element to a greater or lesser degree depending on the desired flowrate. This device is characterized by having a permeable disk 12, the periphery of which is in contact with a coaxial permeable crown 7, by the gas passage in disk 12 and crown 7 being substantially radial, and by essentially the total surface area of each of the outer surfaces of said disk 12 and said crown 7 being in contact with some element of the device or lighter.

Abstract: The valve assembly for the control of flow of liquid from a source of liquid at high pressure to a place of use has at least one restrictive orifice adjacent a movable valve member and valve seat to provide pressure drops in series in the liquid each of which pressure drops is of a magnitude sufficient to maintain the liquid pressure above the vapor pressure of the liquid at the inlet of the valve assembly so that cavitation does not occur. The restrictive orifice varying in flow area automatically in direct proportion to the variable flow area between said movable valve member and the valve seat.

Abstract: In a choke valve having flow restricting stages for controlling fluid under relatively high pressure, a rising stem axially moves a valve toward and away from a valve seat opening and closing a fluid passageway through the valve. A plurality of superposed flow restriction members, each closely surrounding the valve stem and having a recess loosely surrounding the valve stem, are disposed on the upstream side of the valve seat. Slots, formed in the valve stem wall, mate and mismate with the flow restriction recesses in response to axial movement of the valve stem and control fluid under relatively high differential pressure across the valve.

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: A flow control apparatus for use primarily in plug-type valves provides means for continuously varying the flow rate of fluid through the valve while using the same operator that is used to control the open and closed position of the valve. The invention utilizes a globe valve-type throttling plug which requires no special mechanism to coordinate the throttling motion of the valve. Only the plug and lower plate of the valve body are modified relative to existing plug valves to achieve a unique flow control capability. The plug of the invention provides distinct inlet and outlet channels separated by a flow control passage which may be selectively obstructed by a fixed flow control element which is an integral portion of an inverted lower trunnion extending from the bottom plate of the valve body. The vertical position of the plug with the plug rotated for alignment with the inlet and outlet of the valve, determines the degree of flow through the plug.

Abstract: A shut-off valve has a sealing cone which in a closed position of the valve abuts against a conical sealing seat and is formed as a part of a cylindrical throttling piston, a sealing surface of the sealing seat cooperates at its one end with a cylindrical receiving opening for the throttling piston, and the outer diameter of the throttling piston is selected with respect to the inner diameter of the receiving opening so that a throttling gap is formed between the receiving opening and the the throttling piston.

Abstract: An attenuator valve is provided by utilizing a closure member having a fluid passage therethrough and an attenuator device disposed in the passage of the closure member which protrudes therefrom and which provides a variable degree of attenuation dependent upon the degree to which the valve is opened. The degree of attenuation is proportional to the degree to which the valve is opened. The closure member in combination with the attenuator device provides an optimal attenuation in the full range of valve settings with decreasing attenuation as the valve is opened, and so that at full open position the attenuator device does not significantly restrict the flow of fluid.

Abstract: A high pressure multi-stage valve having a pair of opposing plates, one of which has a central flow port, the plates having annular interdigitated teeth and grooves and providing for sinuous path for flow of fluid from the port to the peripheries of said plates to provide for multi-stage expansion in a single pass between the interdigitated teeth. The magnitude of interdigitation can be adjusted. The teeth are of annular form and are of truncated triangular shape in cross section and the grooves are of complementary shape. In one form of the invention, at least a substantial number of the teeth are of the same cross sectional dimensions, and the angles of the side of each tooth to the vertical are the same to provide for equal depth flow legs between the opposing sides of adjacent teeth. In another form of the invention the angularity of the sides of the teeth change in a regular pattern from the axis outward.

Abstract: An orifice valve is disclosed comprising a valve body having a cylindrical upstream chamber, a downstream chamber having an oblong cross-sectional configuration adjoining and coaxial with the upstream chamber, and a shoulder comprising a pair of blind holes at the juncture of the upstream and downstream chambers. A downstream disk having a pair of fluid openings is mounted in the upstream chamber against the shoulder and comprises a pair of blind holes aligned with the blind holes in the shoulder. Rigid pins extend from the blind holes in the shoulder into the blind holes in the downstream disk to prevent rotation of the downstream disk. A rotatable upstream disk having a pair of fluid openings is mounted against the downstream disk and comprises a pair of blind holes. An operator member is provided comprising a forked turning member with a pair of tines, each having a blind hole in alignment with a blind hole in the upstream disk.

Abstract: The invention relates to a device for regulating the flowrate of a liquefied-gas lighter of the type having an elastic permeable disk (11) through which the gas passes and two compression elements able to compress respectively two different zones of this disk, an annular zone and a central zone, one of the compression elements (5) being composed of an annular compression screw rotationally integral with a control element (7) while the second compression element (17) passes through said annular compression screw to ensure compression of the central zone of the disk and is translationally integral with a control element (19). According to the invention, each of these control elements is accessible independently, from the outside of the lighter.

Abstract: A flow-control valve assembly particularly useful in fire fighting apparatus comprising a contoured valve seat mounted axially within a valve body and a balanced tubular valve member reciprocably movable in the valve body coaxially with said valve seat for providing proportional flow control, manual valve actuating means for reciprocably moving the tubular valve member including a disc rotatably mounted in a bore formed in a lateral surface of the valve body on a pivot member on which a handle is pivotally mounted and a pin spaced from the pivotal member extending through the handle and the disc which engages in a circumferential groove formed in the outer surface of the tubular valve member for effecting reciprocable movement of the valve member when the handle is reciprocably moved. The disc can be made of deformable material and provided with means for expanding the disc to impart a braking action on the movement of the handle.

Abstract: A homogenizer with the system designed to jet out emulsions and dispersed solutions from inter-valve microgaps, under high pressure. The microgaps for jetting out the homogenizing liquid are disposed in series at a plural number of locations. Also, it is designed such that the homogenizing liquid passes through two types of gaps, that is, narrow and wide microgaps in consecutive order. Furthermore, discharge ports are constructed with a design such that the homogenized liquid is discharged smoothly without interrupting the homogenization process. In this manner, a large quantity of the liquid can be treated with low homogenization pressure.

Abstract: A power brake booster, in which the valve piston is slidably supported in the control hub and cooperates with the poppet valve, that is formed of any rubber-elastic material. The poppet valve is designed as a cone valve. Thus when the valve passage is opened, atmospheric air enters the working chamber from the air chamber through the opening, that is arranged in the control hub transversely to the booster's longitudinal axis, to flow in almost undisturbed and without turbulence. To ensure a reliable sealing seat, the peripheral surface of the truncated-cone-shaped end of the valve piston is equipped with a curcumferential groove, the one lateral wall of the groove forming together with the peripheral surface a sealing edge which reliably abuts on the plane plate surface of the poppet valve when the valve is closed.

Abstract: A gap is formed between a small diameter powder feed supply orifice and a throttling "needle" which is flattened at its working tip end. The needle is vertically adjustable to vary size of the gap. The powder is a finely divided abrasive material which is delivered to a handpiece in the form of a powder/air mixture for use in abrasive jet machining operations, for example. The powder throttling mechanism cooperates with pressurized air directed at the gap from an internal nozzle to entrain the powder for the mixture. The apparatus is vibrated by a ball and raceway mechanism, the ball being propelled therearound by pneumatic pressure. The apparatus is compact; easy to maintain, operate and clean; and requires no electrical power source of any kind.

Abstract: A low-noise valve has a body with a fluid inlet to receive pressurized fluid, an outlet and a fluid passageway extending between the inlet and outlet. Located in the passageway are a number of spaced throats. The valve also includes a movable stem with a number of plugs each adapted to be closely received by a corresponding throat. Each plug includes a plurality of circumferential alternating grooves and lands, the lands being closely spaced within the throats to create a plurality of flow restrictions each incrementally restricting fluid flow when the stem is at a minimum flow position. Movement of the stem toward a full open position sequentially removes the lands from the throat to reduce restriction of such fluid flow in stages.

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: An attenuator valve is provided by utilizing a closure member having a fluid passage therethrough and an attenuator device disposed in the passage of the closure member which protrudes therefrom and which provides a variable degree of attenuation dependent upon the degree to which the valve is opened. The degree of attenuation is proportional to the degree to which the valve is opened. The closure member in combination with the attenuator device provides an optimal attenuation in the full range of valve settings with decreasing attenuation as the valve is opened, and so that at full open position the attenuator device does not significantly restrict the flow of fluid.

Abstract: A thermostatic valve assembly having a rotatably adjustable insert for varying the throttle resistance of the valve. The insert has a skirt with a spiral shape to effect a first varying cross section for the valve chamber in which the insert is disposed and the skirt also has an inclined section to effect a second varying cross section for the valve chamber.

Abstract: A power steering gear for controlling the dirigible wheels of an automotive vehicle comprising steering gear elements and a fluid motor adapted to drive the steering gear elements to supplement the manual steering effort comprising a rotary valve assembly for controlling distribution of steering pressure from a pressure source to the fluid motor including a sleeve element and a spool element, each valve element having cooperating lands for controlling distribution of pressurized fluid therethrough to effect a pressure buildup in a pressure supply port that communicates with a working chamber of the fluid motor and chamfered surfaces on the valve lands of the internal valve element whereby pressure drop in the pressurized fluid circulated through the valve system and fluid noise is reduced and response of the valve system to steering maneuvers is improved.

Abstract: The delivery of charge material to the hearth of a pressurized blast furnace under the influence of gravity is accomplished without the necessity of changing the direction of material flow at a point exterior of the furnace. The rate of flow of the charge material, which moves in a vertical stream, is controlled by a metering device including a pair of overlapping register elements which define a variable size aperture which remains generally symmetrical with respect to the stream axis.

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 multiple stage valve wherein the valve body provides plural axially spaced seats defining at least in part a flow passageway. A valve member is disposed in said passageway and has plural spaced valve elements cooperatively related to said plural seats. One or more webs on said valve member establish a guided relationship of said valve member to said seats at assembly, during operation, and in relation to fluid flow.

Abstract: A valve constructed such that the part of the valve member actuating mechanism, which is located within the valve, is sealingly isolated from the flow passageway by an arrangement including a chamber whose volume changes upon movement of the valve member. A movable interface is provided between the chamber and the flow passageway, and is moved upon increases or decreases in the volume of the chamber, in the appropriate direction, to compensate for such volume changes. The valve may have a device for injecting a lubricant into the chamber and for contact with the interface.

Abstract: A vent valve for steam radiators fired by intermittent furnaces is disclosed. The valve includes a conduit with two portions. Two blocking rods form constricted areas within the two portions to throttle air escaping from the radiator.

Abstract: A valve for a liquefied gas lighter, which includes an expander-evaporator and a flow limiter for limiting flow of the liquefied gas to the expander-evaporator, the flow limiter including a rigid member, a deformable sleeve of a gas permeable material surrounding the rigid member, an elastically deformable element in contact with the sleeve, and a compression member for compressing the elastically deformable element and deforming it radially in the direction of the sleeve and the rigid member. The rigid member includes a support member for supporting the sleeve and the expander-evaporator, the elastically deformable member is an O-ring surrounding the sleeve, and the expander-evaporator is a deformable and permeable element whose permeability is varied by movement of the rigid member, effected through an adjustment member.

Abstract: A fluid pressure equalizing valve adapted for use in hydraulic systems includes a valve body having fluid inlet, working and vent ports, a valve plug in the valve body having a working passageway and a vent passageway formed therein and communicating with the peripheral wall thereof, the plug being rotatable in the valve body between a working position wherein the working passageway is aligned with the inlet and working ports and a vent position wherein the vent passageway is aligned with the inlet and vent ports. The valve plug includes a plurality of orifice passageways formed therein communicating the peripheral wall thereof with the vent passageway, each orifice passageway having a substantially smaller diameter than the working passageway. Means are provided for preventing fluid flow through the orifice passageways when the valve plug is in the working and vent positions.

Abstract: An attenuator valve assembly includes a closure member having one or more attenuator plates associated with it. The closure member have the form of a ball with a bore, a ball calotte, or a butterfly valve disc, etc. The attenuating effect of the attenuator plates are called into play immediately when the closure member is first opened, with the attenuating effect greatest during initial opening of the closure member and diminishing as the closure member is moved toward the completely open position. When the closure member is in the form of a valve disc or ball calotte, the attenuator plates are mounted for rotation with the closure member spaced from the closure member.

Abstract: A series of hydraulic shock absorbers all using the same piston. This is attained by giving no damping function to the liquid passages in the pistons, by which all pistons can be provided with an equal number of passages with a fixed, relative large cross-section. Thus, all pistons are equal. The damping function is taken over by an annular damping member between the piston and the valve.

Abstract: An improved carbonated beverage mixing and dispensing valve (A) is illustrated as including a housing (10) having an entrance port (16) for the admission of carbonated mixing water and valve outlets (22a) for admitting flavored syrups. A valve (B) is carried in the entrance port for controlling the flow of carbonated water which includes an adjustable metering rod (20) carried in an internal bore (104a) of valve stem (104) which may be adjusted externally of housing (10). Flow of syrup is controlled through valve outlet (22a) by means of flow control device (C) which includes a raised ridge (44a) and valve plunger (46) between which a section of valve tubing (22) is pinched off intermediate a valve inlet (30a) and valve outlet (22a). A single operator lever (92) operates both the valve (B) and flow control device (C) in a single action.

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: A control component such as a valve or throttle member for a hydraulic system comprises an outer member, and a body portion disposed in the outer member and having an outside surface co-operable with an inside surface of the outer member, the outer member and body portion being movable relative to each other. The flow duct extending between the inlet and outlet of the component includes at least one flow passage which opens at the outside surface of the body portion, and the mouth opening of the flow passage communicates with a curved duct portion which extends at an inclined angle relative to a radial plane through the body portion. The flow section of the or each duct portion decreases towards the tip thereof, to provide finely adjustable control of the flow of fluid through the component.

Abstract: A non-chattering, float-controlled, pilot-operated diaphragm valve for controlling the flow of liquids from a conduit under pressure to a tank where the surface is in turbulent condition. The lightweight float and pilot valve follow the relatively high frequency fluctuations of level and the diaphragm valve responds causing a rapid opening and closing of the main flow through the conduit into the tank. The chattering is eliminated by the insertion of operative means between the float closure means and the movable diaphragm. A small diameter rod of selected length is positioned between the diaphragm and the closure means so that when the main flow through the conduit starts, the movement of the diaphragm away from the conduit forces the pilot valve to open and submerge the float to a considerable depth.

Abstract: An electro-hydraulic proportional control valve includes an electro-hydraulic pilot valve, an inlet pressure reducing valve, and a directional control valve. The electro-hydraulic pilot valve receives an electrical input signal and provides a hydraulic signal to the directional control valve in response to the electrical signal. The inlet pressure reducing valve modulates fluid flow from a pump to the directional control valve to maintain a constant pressure drop across the directional control valve under all conditions. The directional control valve includes a directional control valve spool which shifts between a neutral position, a leftward displaced position, and a rightward displaced position in response to the hydraulic signal from the electro-hydraulic pilot valve. The directional control valve spool includes a range adjustment device for adjusting and setting the flow rate through the directional control valve.

Abstract: Low flow control valve having contoured cylindrical plug means cooperating with a semi-elastic sleeve, the latter being suitably retained within a valve orifice capable of providing not only tight shut-off, but also no clearance between said valve plug and orifice when the plug is retracted so that all fluid passes by a profiled portion of said plug. Said sleeve type sealing means is further pressure assisted by line fluid to enhance the aforementioned sealing capability.

Abstract: An hydraulic system: a power assisted vehicle steering system which includes such an hydraulic system and a method of alleviating noise in an hydraulic system. The hydraulic system as applied to a vehicle steering gear (1) has an open center valve (3) which directs hydraulic fluid under pressure derived from a pump (12) and in response to a steering maneuver through a shaft (4) to a servo motor of the gear (1). Downstream of the open center valve (3) is a restrictor (8) through which hydraulic fluid from the valve (3) passes to a reservoir (11). The restriction effected by the restrictor (8) to fluid flow from the valve (3) to the reservoir is variable to provide a throttling action and a back pressure in the line (6) to alleviate noise in the valve (3).

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 valve to control flow between outside and inside a tubular member. The valve is housed concentrically in an annular body around a tubular member and may be utilized mounted on an outside mandrel or in a side pocket mandrel which may be included in a well tubing string to control injection or lift gas flow from the well annulus into the tubing. Variable and staged flow restrictors upstream and downstream protect the resilient valve seal from flow cutting and opening closing stresses. The valve is balanced and is not urged to open by increasing outside pressure. The balanced valve minimizes difference between open and close pressures as opening pressure is very near closing pressure. An operating piston, in communication with outside and inside pressures, senses differential pressure and moves the valve axially to open when outside pressure is sufficiently higher than inside pressure. A compressed spring holds the valve closed and opening and closing pressures may be adjusted.

Abstract: A valving arrangement for use in the production of an aerated product such as chocolate, in which the product is pressurized with a gas, preferably a soluble gas such as carbon dioxide, wherein the valving arrangement includes a first valve plate (22) having a tapered orifice (22A) therein, a second valve plate (25) which is adjustable relative to the first plate in a plane transverse to the axis of the tapered orifice, and having a corresponding tapered orifice (25A) therein, the axis of which is parallel to the first axis, whereby the flow passage through these orifices can be preadjusted. Means are provided to close off the flow passage through the orifices abruptly without altering the preadjustment of the flow passage. This can be achieved by inserting a rod (16, 30) into the upstream orifice or by moving the valve plate a greater distance than the diameters of the orifices.

Abstract: A valve assembly includes a stack of valve members which define a number of annular valve slits between knife-edge valve seats and opposing valve surfaces. The valve members are rings having grooves formed therein to define a low pressure liquid chamber. A ridge between the central hole in each ring and the chamber groove forms the knife edge valve seat. Homogenizing pressure can be controlled by flexing a bearing plate at the end of the stack of valves. Spring elements between the valves bias the valves apart when they are released by the hydraulic valve actuator to enable cleaning of the valve slits.

Abstract: A throttle valve assembly for controlling flow of air through a passage. A housing is provided having a straight flow passage extending therethrough. The housing also has a bore formed therein in intersecting relationship to the passage. A valve is movably positioned within the bore for adjustably restricting the flow of air through the passage. The valve includes an elastomeric sleeve coaxially aligned with and positioned within the bore and being axially movable therealong into a position wherein the sleeve means extends across the passage. Relatively movable abutments coact with the sleeve when the latter is in said position for resiliently deforming the sleeve into at least partial sealing engagement with the housing for restricting or preventing flow of air through the passage.

Abstract: The valve passes incoming pressurized fluid through a pair of orifices arranged in opposite side walls of a hollow tubular plug to form two fluid jets which impinge upon one another in the plug interior prior to exiting. The orifices are elongated and selectively covered by an adjustable sleeve which is positioned by manipulation of a valve stem extending outwardly of the valve housing. Further pairs of orifices are angularly arranged with respect to the first pair and the sleeve includes parts which cover the other orifices when a first pair are operative. The valve stem is selectively rotatable to position the sleeve to expose another pair of orifices to the pressurized fluid.

Abstract: A valve adapted to control liquid pressure by sliding within a valve housing a bottomed tubular valve closure member having a porous peripheral wall. The pores are subjected to reverse flush by moving the valve closure member to a closed position and also by closing an open end of the valve closure member. The valve housing includes a passage for discharging the liquid from the valve at times of the reverse flush.

Abstract: A high pressure multistage valve in which a multiflanged plug is shiftable vertically within a passage provided by a stack of encircling rings, which can be readily exchanged or replaced. A turnable stem effects linear movement of the plug via a motion converting mechanism located in the interior of the valve. A lubricating system for the mechanism has a movable interface with the fluid being controlled.

Abstract: A flow control mechanism for high pressure wells comprises a body structure having inlet and outlet passages and adapted for connection to a wellhead in such manner that a metering device meters the flow of production fluid through the inlet and outlet passages. The body structure defines an access opening that is ordinarily maintained closed by a closure element received within the access opening. An annular sealing element is received within an annulus defined between the body structure and the closure element and is formed to define a frusto-conical sealing surface that engages a frusto-conical seat surface defined by the closure element and establishes a high pressure seal between the body structure and closure element.

Abstract: A back pressure control choke operates to automatically control and maintain a desired back pressure on the fluid passing through the choke. The choke housing has an inlet channel which intersects with an axial bore, part of which bore constitutes the discharge channel. An annular choke seat concentrically arranged in the discharge channel of the axial bore is adapted to receive an annular choke element. The choke element is affixed to a shuttle which is mounted on a fixed mandrel extending into the axial bore of the choke housing. The shuttle is dynamically sealed against the housing and mandrel such that a closed chamber is created in that portion of the axial bore opposite the discharge channel. The shuttle element is constructed to be fluid balanced such that it will move to achieve an equilibrium of pressure on its forward and rear surfaces.

Abstract: It has been determined that homogenizing efficiency can be increased substantially by expressing the fluid through a valve in which the valve seat has a knife edge configuration and the valve gap has an optimum height of less than 0.003 inch. To provide the high flow rate required in most industrial applications, the total length of slits within a valve assembly, each having the optimum gap, is selected for given homogenizing and back pressures. In a preferred embodiment, in order to provide the extended slit length necessary within such a valve assembly, a plurality of annular valve slits are provided between stacked valve members within the assembly.

Abstract: A ballcock assembly adaptable for use in a variety of sizes and types of toilet flush tanks. The ballcock assembly comprises a standpipe having a ballcock valve at its upper end and having an adjustable height mechanism for varying the height of the ballcock valve in a toilet flush tank. The ballcock valve is a positive closing valve which includes a valve element movable to an open position against the pressure of the supply water by means of a valve actuating member that is pivotally connected to the standpipe and that is also connected to a float unit which surrounds the standpipe unit. The standpipe includes a hush tube which conveys water to the bottom of the toilet flush tank. The hush tube carries water distribution control means which functions to control the proportion of water delivered to the toilet flush tank and to the bowl refill.

Abstract: A fluid control valve and its method of use, the valve having a plurality of annular fluid control elements stacked within a housing, and resilient means for biasing the fluid control elements in a spaced apart relationship in order to provide for fluid flow between the fluid control elements, the fluid control elements forming a seat adapted to receive the resilient means and also including means for producing an interference fit about the periphery of the fluid control elements adjacent the center space within the annular stack of fluid control elements.