Abstract: A fluid control valve for use in a system for inflating an anti-G garment. The valve includes an elongate chamber in which a valve member is moveable. The chamber has first and second axial ends. An inlet opening in a chamber wall provides for the flow of fluid into the chamber. A valve edge is provided at the second end of the chamber to form an outlet. The valve member has a first portion which closes the first chamber end and is moveable in the chamber between the inlet opening and the first chamber end, an intermediate portion which has a cross sectional area less than that of the chamber wall to permit the inflow of fluid to the chamber, and a second portion including a flow control device which co-operates with the valve edge to control fluid flow from the valve.

Abstract: A pressure regulated flow valve which compensates for the decreasing internal pressure inside a pressurized product dispensing container using substantially insoluble compressed gas. Where the internal pressure within the pressurized product dispensing container decreases below a certain threshold pressure, the pressure regulated valve provides for an increase in the flow of the product being dispensed from the pressurized container via the pressure regulated flow valve.

Abstract: Valve trim retention apparatus for use with valves are described. An example valve trim retention apparatus includes a liner to retain a valve seat within a valve body. The liner includes an outer surface having first external threads to engage a first threaded opening of the valve body. A ring retainer engages the liner and has second external threads to engage a second threaded opening of the valve body. The first and second threaded openings cause the liner and the ring retainer to move in opposite directions when the liner and the ring retainer are rotated in same direction.

Abstract: A temperature control system for a gas appliance utilizes an improved variable orifice gas flow modulating valve capable of direct modulation of gas flow through an orifice directly into a gas burner to provide a constantly maintained temperature in an appliance working compartment, as selected by human interface via a temperature selector. An actuator attached to a gas fitting body of the valve provides for linear movement of a metering pin into the taper inside the orifice, accomplishing the variable controlled modulated flow of gas directly into the burner. The actuator is controlled by an input signal from a programmable controller whose output is determined by calculations based on inputs from a temperature selector and a temperature sensor located in the gas appliance working compartment.

Abstract: Apparatuses to control a fluid flow characteristic of fluid regulator bypass valves are described. An example apparatus includes an insert having a body sized to be inserted in a passage of a bypass valve. The body includes an opening to fluidly couple a bore of the body to an outer surface of the body. The opening being shaped to produce a predetermined flow characteristic in response to at least a portion of a restrictor of the bypass valve moving relative to the opening to vary a fluid flow through the opening and the bypass valve.

Abstract: The production of purified water from a residential reverse osmosis drinking water system is limited by the pressure build up in the holding tank or reservoir. While the pressure in the tank increases the brine or waste water continues to flow at a constant rate. This condition makes an undesirable out of proportion relationship between the purified water and the waste water. The production of product water is controlled by the differential pressure across the purification membrane, as the tank pressure increases the differential pressure decreases and reduced production of product water results. The purpose of the device is to utilize the increasing tank pressure as a force to actuate the valve that proportions the waste water in a direct relationship with the product water. The ratio between the product water and the waste water remains constant during the period that purified water is being delivered to the holding tank.

Abstract: An electric motor for driving an inertia separator is provided, including a stator and a rotor. The stator is arranged in a stator space enclosed by a stator housing. The rotor is arranged in a rotor space concentrically with the stator with regard to an axis of rotation. A ring gap is formed radially between the rotor and the stator such that it separates the stator space from the rotor space. A housing bottom includes a nonmagnetic section extending through the ring gap. An inertia separator includes a second rotor operably connected to the rotor. A separator housing encloses a void containing the second rotor, wherein the housing bottom is arranged on the separator housing on a side facing the electric motor such that the nonmagnetic section of the housing bottom defines an opening in the rotor space that is oriented towards the void.

Abstract: A plug for use in a valve system comprising a generally elongate elastically deformable plug body having a longitudinal axis and a first end and an opposing second end, said body forming a blind hole disposed extending in a longitudinal direction downwards from said first end, a flange juxtaposed with said first end and extending radially outboard, wherein said plug forms at least one orifice at least partially formed in said plug body, whereby said plug is longitudinally elastically elongatable.

Abstract: A fluid control valve includes a valve housing having an inlet and an outlet. A metering plug is located within the valve housing, and is configured to move linearly within the valve housing along a valve axis between an open position to allow fluid flow between the inlet and the outlet, and a closed position to block fluid flow between the inlet and the outlet. A reference plane is oriented perpendicular to the valve axis. The metering plug includes a nose portion having a sensing port in fluid communication with fluid flow at the outlet. The sensing port is oriented perpendicular to the valve axis and generally parallel to the reference plane.

Abstract: A temperature control system for a gas appliance utilizes an improved variable orifice gas flow modulating valve (10) capable of direct modulation of gas flow through an orifice (20) directly into a gas burner (54) to provide a constantly maintained temperature in an appliance working compartment, as selected by human interface via a temperature selector. An actuator (12) attached to a gas fitting body (14) of the valve provides for linear movement of a metering pin (16) into the taper inside the orifice, accomplishing the variable controlled modulated flow of gas directly into the burner. The actuator (12) is controlled by an input signal from a programmable controller (90) whose output is determined by calculations based on inputs from a temperature selector and a temperature sensor located in the gas appliance working compartment.

Abstract: An electromagnetic valve has a fixed core, a movable core, a coil attract the fixed core and the movable core each other, a valve body and a valve seat member including a funnel-shaped valve seat surface and an inlet path. The flow path is closable by retreat/advance of the valve body relative to the valve seat surface. The valve body includes a semi-spherical seal portion and a stem portion extending from the seal portion towards the movable core, a diameter of an end portion of the seal portion at the stem portion side is larger than a diameter of an end portion of the stem portion at the seal portion side. A space is defined in an area located on an extended line extending from a small diameter end portion to a large diameter end portion of the valve seat surface.

Abstract: A reverse flow valve for metering high pressure gaseous media, such as ignition media to the injectors of a scramjet engine in a hyerpsonic flight vehicle, has a metering member that moves parallel to the flow direction of the metered media and throttles the valve in a direction counter to the flow direction. This reduces side loading on the metering member and permits the use of a lighter and smaller actuating mechanism. The metering member can be a pintle having a uniquely configured pintle seat providing bubble tight shut off of the inlet flow without effecting the critical flow contour of the media. The pintle can be driven by a piston that is responsive to push-pull forces of pressurized drive fluid under servo control. The drive fluid is isolated from the gaseous media by a primary seal, which can be seated on the piston without deformation by a seal retainer.

Abstract: An expansion valve includes a valve body 1. The valve body 1 includes a first throttle 5 and a second throttle 6 arranged downstream from the first throttle 5. The second throttle 6 includes an outer surface of the second valve portion 16 and an inner surface of the second valve hole 13. A helical groove or a linear groove is formed in the outer surface of the second valve portion 16 or the inner surface of the second valve hole 13. Further, at least either one of the outer surface of the second valve portion 16 and the inner surface of the second valve hole 13 is tapered toward a distal end of a valve member 4.

Abstract: A capacity control valve where a valve section is caused to be in contact with and separated from a valve seat by a valve rod to control the flow rate of pressurized fluid. The capacity control valve includes a first valve rod having a valve section and having a first peripheral surface formed on its outer periphery, a first valve chamber having a valve seat that comes into contact with and is separated from the valve section and having a first path into which pressurized fluid flows, and a valve housing having a through-hole that is movably fitted on the first peripheral surface of the first valve rod. The through-hole of the valve housing has a first tapered surface diverging as it goes away in the axial direction from the first valve chamber.

Abstract: A tap having a body, a horizontal inlet, and primary and secondary downwardly-extending spouts, the tap having primary and secondary flow paths. The primary flow path is adapted to dispense a bulk portion of beverage and includes a horizontally oriented primary valve having a primary valve stem and a primary valve seal. The secondary flow path is adapted to dispense a foamed portion of beverage and comprises a flow restriction for inducing turbulence in a beverage flowing through the secondary flow path to produce foam, the secondary flow path including a horizontally-oriented secondary valve with a secondary valve stem and a secondary valve seal. The primary and secondary valves operate independently and have valve stems sliding on spaced apart axes.

Abstract: Some embodiments of the present invention provide a comestible fluid dispensing apparatus including a nozzle defining an interior space and having a fluid inlet through which fluid is received within the interior space and a fluid outlet through which fluid exits the interior space and a substantially conical valve movable relative to the nozzle between different positions with respect to the nozzle and shaped to reduce turbulence and/or provide improved dispensing control.

Abstract: A miniature needle valve having an improved internal body-to-bonnet metal-to-metal seal. The body seal incorporates a novel dovetail feature that improves the metal-to-metal contact forces as pressures increase. The space requirements of the seal are minimized in order to fit within a miniature valve body. The valve body can use dual outlet passageways to further minimize space requirements and improve the valve's flow characteristics. The body-to-bonnet seal improvements increase the pressure limits of the valve beyond similar-sized miniature needle valves of the prior art.

Abstract: Hydraulic valve having a valve body and housing, which has a first, second and third cutout. A hydraulic medium is fed via the first cutout. The hydraulic medium is fed to a pressure consumer via the second cutout and to a pressure sink via the third cutout. The valve body moves to and fro between two end positions. From a second end position, the hydraulic medium passes from the first to the second cutout. In a first end position, the hydraulic medium passes from the second to the third cutout. Owing to the valve body, a constant flow cross section for the hydraulic medium, released by the first cutout, arises during a switching operation from the first into the second end position in a fixed time span, resulting in a maximum flow cross section being achieved when the valve body is in the second end position.

Abstract: A method for oxidizing an organic material includes the steps of (a) forming a preoxidation mixture comprising the organic material and water, and (b) causing the preoxidation mixture to react with a liquid oxidizer in a continuous flow reactor supercritical conditions for water, including a pressure of at least 3206 psia and a temperature of at least 705° F., to form a post-oxidation mixture containing condensible material and non-condensible material, wherein substantially all of the organic material has been oxidized.

Abstract: A flow rate regulation valve comprising a housing (11) formed with a valve hole (13), a needle valve (60) moved relative to the valve seat (16) in the housing, and a flow rate adjust knob (40) mounted at the proximal end of the needle valve extending from the housing, wherein the needle valve is moved relative to the valve seat by rotating the flow rate adjust knob thereby regulating the flow rate of fluid flowing through the valve hole, the flow rate regulation valve further comprising a knob fixing means (35) for stopping the rotation of the flow rate adjust knob. As a result, the flow rate is prevented from being changed accidentally by a user or the like. Further, the value may have a seal adjust means (20) adjusting the sealed state between the housing and the needle valve. The seal adjust means may be formed as a part of the housing, and may be fixed to the housing by a fixing pin (15).

Abstract: An apparatus for controlling medium flow, especially for controlling dilution liquid flow in connection with the headbox of a paper-making machine or a cardboard-manufacturing machine, which apparatus comprises a valve which controls dilution flow, which valve consists of a valve housing, a stem part and a flow channel between an inlet and an outlet of the valve. The stem part is movable in the housing between at least two positions, a first position in which the flow path between the inlet and the outlet is open, and a second position in which the flow path is closed, and the stem part and/or housing is designed to direct the medium flow at least in the vicinity of the outlet opening.

Abstract: The present invention concerns a valve (1), a valve closing body (14) and use of a valve (1) and a valve closing body (14) of the type used for injecting dry powder which is mixed with liquid, and where the dry powder is supplied under the liquid surface in a mixing vessel (11) in which a vacuum is typically maintained. The novel feature of a powder valve (1) according to the invention is that a closing body (14) of the valve in the closed position extends through the valve seat (13) of the valve and into the wet environment. It is hereby achieved that when the valve (1) is opened, powder or dust from powder is not deposited on the valve closing body (14). This is in spite of the valve closing body (14) being wet, due to contact with the liquid to which the powder is added. Due to its elongated shape, the valve closing body (14), which in the withdrawn position opens for inflow of powder, has the property that the inflowing powder dries the valve closing body (14) at first and keeps it dry subsequently.

Abstract: A fluid control device comprises a valve body, a valve plug, a valve cage, and a sealing ring. At least a portion of the sealing ring is disposed within a gap between the valve plug and the valve cage to provide a seal therebetween when the valve plug is in the closed position. The sealing ring includes an L-shaped cross-section that provides an effective seal regardless of the port diameter of the fluid control device, and thus, reduces the number of types of seals required to be stored in inventory for various applications.

Abstract: A compact flow control valve with high flow stability is arranged to comprises: a valve body made of resin including; a first passage formed in the valve body; a valve port communicating with the first passage; and a valve seat formed around the valve port; a valve element movable into contact with and away from the valve seat; a valve chamber formed around the valve seat; a second passage communicating with the valve chamber; and a flow adjustment rod for adjusting a flow rate of a fluid allowed to flow in the valve chamber, wherein the flow adjustment rod is adjustable in position to change an opening degree of the valve element relative to the valve seat for adjusting the flow rate, and the flow control valve further comprises an annular recess formed in an inner periphery of the valve seat formed surrounding the valve port and configured to prevent radial deformation of the valve port when the valve element is moved into contact with the valve seat.

Abstract: A tap suitable for dispensing a gaseous beverage comprising a body, a horizontal inlet, and primary and secondary downwardly-extending spouts, the tap having primary and secondary flow paths. The primary flow path is adapted to dispense a bulk portion of beverage and comprises a horizontally oriented primary valve, the primary valve comprising a primary valve stem which is axially-slidable relative to the horizontal inlet, between closed and open positions and a primary valve seal, the primary downwardly-extending spout being positioned downstream of the primary valve, such that, in a closed position of the primary valve, beverage entering the horizontal inlet is prevented from flowing through to the primary downwardly-extending spout.

Abstract: A present invention is advantageously applied to a purge valve for purging evaporated fuel stored in a canister to an intake pipe of an engine. The purge valve has a fluid passage connecting an inlet port and an outlet port, and a normally closed valve port that is selectively opened by operation of an electromagnetic actuator is disposed in the fluid passage. A barrier pillar is disposed in the fluid passage between the inlet port and the valve port to suppress transmission of pulsating waves generated in the purge valve to the canister. Flow resistance of the barrier pillar is higher in a reverse flow direction from the valve port to the inlet port than in a normal flow direction from the inlet port to the valve port. The transmission of the pulsating waves is well suppressed by the barrier pillar while allowing a smooth flow from the canister into the purge valve.

Abstract: A needle valve with a hollow needle effective for permitting a portion of the fluid passing through the valve to flow throughout the valve and exit through any leaks in the valve, whereby any environmental fluid within the valve is displaced by the fluid passing through the valve.

Abstract: Disclosed herein is an inline valve. The inline valve includes, a housing, a choke member in operable communication with the housing, a portion of the choke member being substantially immobile relative to the housing and a portion of the choke member being mobile relative to the housing. The inline valve further includes, an actuator in operable communication with the movable portion of the choke member, the actuator selectively causing the choke member to deform radially.

Abstract: A valve member for use in a dispensing gun and a dispensing gun. The valve member has a valve body, a metering portion located downstream of the valve body, and a seal located downstream of the valve body. The dispensing gun includes a body, a passageway formed in the body, an inlet at an upstream end of the passageway, a valve seat at a downstream end of the passageway, a valve member that engages the valve seat at a metering interface, and a seal that blocks the passageway downstream of the metering interface when the valve member is in the closed position.

Abstract: A flow rate regulation valve (10) comprises a housing (11) formed with an axial hole (14) and a valve hole (13) communicating with the axial hole, a needle valve (60) adapted to move within the axial hole relative to a valve seat located between the axial hole and the valve hole, and a flow rate adjust knob (40) mounted at the proximal end of the needle valve extending from the housing. The needle valve is moved relative to the valve seat by rotating the flow rate adjust knob thereby to regulate the flow rate of the fluid flowing through the valve hole. A first valve body (67) is arranged at the forward end of the needle valve and a second valve body (65) extends from the end surface (67a) of the first valve body.

Abstract: Certain embodiments of a fluid control valve include one or more ceramic components that operate substantially free of tensile stress concentrations along the control surfaces. In some embodiments, a fluid control valve includes a ceramic plug having a set of longitudinal grooves milled in the cylindrical surface of the plug to define control surfaces. The plug is disposed in an internal longitudinal cavity of the valve body such that the fluid flows over the plug's control surfaces in a direction substantially parallel to the control surfaces. The ceramic plug and other ceramic components may be manufactured using relatively simple machining techniques to reduce the overall production costs.

Abstract: In a manual switching valve, which enables a valve plug to be opened and closed manually, a piston is threadedly engaged with a shaft that is inserted through a housing, wherein a handle having a switching mechanism therein is installed on an upper end of the shaft. After a valve plug is seated on a valve seat, any further turning force applied to the handle is interrupted without being transmitted to the shaft owing to the fact that balls disengage from tooth portions of the shaft.

Abstract: A compact flow control valve with high flow stability is arranged to comprises: a valve body made of resin including; a first passage formed in the valve body; a valve port communicating with the first passage; and a valve seat formed around the valve port; a valve element movable into contact with and away from the valve seat; a valve chamber formed around the valve seat; a second passage communicating with the valve chamber; and a flow adjustment rod for adjusting a flow rate of a fluid allowed to flow in the valve chamber, wherein the flow adjustment rod is adjustable in position to change an opening degree of the valve element relative to the valve seat for adjusting the flow rate, and the flow control valve further comprises an annular recess formed in an inner periphery of the valve seat formed surrounding the valve port and configured to prevent radial deformation of the valve port when the valve element is moved into contact with the valve seat.

Abstract: A nozzle design and method for designing such a nozzle being adapted for three phase slurry flow from the choke into the flash tank during pressure let-down in autoclave mining operations that uses a selection of the expansion ratio in the choke to select a nozzle dispersion angle to select a spread of the flow over the slurry pool in the flash tank, to generally maximize the use of the pool for energy dissipation without causing undo wear and tear on the tank walls.

Abstract: A valve including a valve body, the valve body providing an inlet and an outlet, a valve seat between the inlet and the outlet, a valve member, the valve member and valve seat being relatively movable to control flow through the valve, the valve member engaging the valve seat to prevent flow through the valve and disengaging from the valve seat to permit flow through the valve.

Abstract: A high recovery metering valve includes an inlet, outlet and a plenum. An internal valve trim places the plenum in communication with the outlet. A valve poppet is moveably positioned within the internal valve trim. In one embodiment, the valve poppet includes a distal portion that is tapered. In another embodiment, the distal portion is characterized by a double radius. In some embodiments the inlet and the outlet are orientated about ninety degrees with respect to each other.

Abstract: A variable orifice valve for balancing the flow of particulate coal in an air stream relative to other parallel conduits. The valve comprises a section of conduit which changes in area along its flow axis and a variable position valve element mounted within the conduit section. The valve element has a shape which proximates that of the conduit section and is movable axially to vary the annular area of the flow path around the valve element. There is no valve seat and, therefore, the valve is always open to some degree.

Abstract: A faucet comprises a valve body having a bore, an inlet port and an outlet port. A plunger is disposed in the valve body and is reciprocated in the bore. The inlet port opens into a fluid passage adapted for connection to a pressurized source, and the outlet port opens into a dispensing spigot adapted to discharge materials from the faucet. A handle having a pivotal lever is disposed in the valve body and engages the plunger to reciprocate longitudinally through the bore. A plug is mounted on the plunger and has axial and radial sealing surfaces. The plug is forced against the axial valve seat when the valve is closed to deform in both axial and radial directions.

Abstract: A high recovery sonic gas valve design with the inlet flow entering transverse and orthogonal to the outlet flow is presented. The configuration cancels the effects of the inlet flow entering orthogonal to the axis of the nozzle and diffuser. The inlet passage is curved in a manner to let the flow enter along the centerline of the nozzle and diffuser. The nozzle is contoured and provides upstream flow impedance. The diffuser is contoured with the area gradient varying from a low positive value at the nozzle throat then to a maximum value and finally dropping off significantly to near zero prior to the nozzle exit. The diffuser is nearly cylindrical and may extend past the valve outlet flange and protrude into adjacent piping.

Abstract: An annular valve seat is formed in a connecting path connecting a first main port and a second main port, a circular flow path wall having a diameter greater than a seat diameter is formed around the valve seat so as to surround the valve seat, a circular outer peripheral wall having a diameter greater than the seat diameter and smaller than a diameter of the flow path wall is formed at a disc-shaped valve member, and a restricted flow path is formed between the flow path wall and the outer peripheral wall when the valve member is fitted in the flow path wall.

Abstract: A proportionally adjustable pressure limiting valve wherein a valve cone may be actuated via an armature of a proportional solenoid. The valve cone is cardanically supported in the armature. Additional guidance of the valve cone is effected through the intermediary of a housing-side guide, wherein the play between valve cone and housing-side guide is designed to be less than the play between valve cone and armature.

Abstract: When a valve body of a coupling member is moving toward a fluid passage closed position, if the valve body becomes inclined, the present invention prevents a sealing ring of the valve body from coming into friction engagement with a conical wall surface of the fluid passage and coming to a stop. The valve body has a valve head provided with a disk-shaped portion, a sealing ring, and a sealing ring support that supports this sealing ring against the valve head; and an angle that a line tangent to a disk-shaped member of the valve head and sealing ring makes with respect to the axis of the valve body is less than or equal to an angle that the conical wall surface, forming the valve seat of the fluid passage, makes with respect to the axis of this fluid passage.

Abstract: An electromagnetic control valve having a permanent magnet and a needle are fitted in a cylindrical valve body, and a coil, and first and second yokes are mounted on an outside circumferential surface of the valve body. There are first and second ports in the valve body for making an outside space and an inside space of the valve body in communication. There is an orifice in the valve body for making the first and the second ports in communication. The needle is disposed at a position opposite to a side of the orifice, for moving in an up/down direction when a current is applied to the coil. Direction and amount of movement of the needle are dependent on a direction and an intensity of the current applied to the coil. When the needle moves, a tip of the needle varies an opened area of the orifice linearly, according to which a flow rate of the fluid passed through the orifice is controlled according to a position of the needle.

Abstract: A trim insert for a choke assembly is disclosed, wherein the trim insert is a tubular member with a substantially constant inner diameter. A first end of the device is positioned within an adjacent upstream sleeve and a second end is sealingly retained within the discharge channel of the choke assembly. A flange coaxially retains the tubular member between the sleeve and a shoulder of the choke body. The trim insert is made of an erosion resistant material, such as tungsten carbide, hardened steel, or a ceramic. Additionally, the inner surface of the tubular member may be coated with a hardening compound to provide additional erosion resistance.

Abstract: In a needle valve (1) for a high-pressure gas conduit system consisting of two units (2, 3) which are joined and one of which encloses a stepping motor (8) and the other includes gas flow passages and a gas flow control bore (17), a valve needle (10) is supported in the housing unit so as to be movable by the stepping motor and extends into the gas flow control bore (17) in the other housing unit through a guide passage (18) provided with seals to prevent gas from flowing to the housing unit including the stepping motor (8) between a region of the guide bore (18) and a low pressure region of the needle valve (1) a compensation connection is provided for relief of pressure at the sealing region (43) of the guide bore (18). The needle valve is particularly suitable as an expansion valve in an automotive CO2 air conditioning system.

Abstract: A flow control device includes an opening part through which an upstream side of a fluid flow passage is in communication with a downstream side of the fluid flow passage. A valve element closes the opening part and includes a large flow rate controlling valve element capable of adjusting an opening degree of the opening part, a sealing member provided with a valve hole having an open area smaller than the opening part and formed to be capable of being brought into tight contact with a peripheral wall part of the opening part and a small flow rate controlling valve element capable of adjusting an opening degree of the valve hole. A valve drive device rotates to drive the valve element in a closed direction for closing the opening part or in an opened direction for opening the opening part.

Abstract: A beverage dispenser to provide a plurality of different flavors with accurate mixing control comprises a housing (40, 42, 44) containing a diluent valve (46A, 46B) and at least two concentrate valves (48A, B, C, D), each valve having its own inlet (12) and outlet (14), characterized in that all the outlets (14) lead to a single dispense nozzle (50A, B, C), a flow rate sensor (16) is provided for each valve, the flow rate sensors (16) being connected to a controller (54), and a setting mechanism (52A, B, C, D, E, F) is provided to open and close each valve, the controller (54) operating the setting mechanisms whereby one concentrate valve and the diluent valve may be opened to dispense a particular beverage and, in response to the sensed flow rates through those opened valves, controlling the degree of opening of those valves to achieve a predetermined diluent to concentrate ratio for the beverage mixture in the dispense nozzle (50A, B, C).

Abstract: A precision modulating globe valve for controlling the flow of a fluid from zero to a maximum flow rate. The valve plug of the globe valve includes at least one flow modulating channel recessed from the outer surface of the valve plug. The outer surface of the valve plug engages a sealing member positioned along the inner surface of the valve port. The sealing member provides a fluid-tight seal between the outer surface of the valve plug and the valve port. The flow modulating channel is recessed from the outer surface of the valve plug from a minimum flow end to a maximum flow end. The radially recessed area of the flow modulating channel increases from the minimum flow end to the maximum flow end, such that as the valve plug moves past the stationary sealing member, an increased flow rate is created through the valve port.

Abstract: A variable orifice valve for balancing the flow of particulate coal in an airstream relative to other parallel conduits. The valve comprises a section of conduit which changes in area along its flow axis and a variable position valve element mounted within the conduit section. The valve element has a shape which proximates that of the conduit section and is movable axially to vary the annular area of the flow path around the valve element. There is no valve seat and, therefore, the valve is always open to some degree.

Abstract: An improved control valve in combination with a pressurized water closet having a housing, a spool rotatable within the housing, a valve stem threading engaging the spool but fixed from rotating relative to the housing and a needle valve extending from the valve stem and into the housing orifice, creating a self cleaning valve adjustable by rotating the spool, which adjusts the depth of the needle valve in the orifice, and thus adjusting the effective opening of the orifice.