Abstract: In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes pressure reduction chambers for reducing fluid pressure in an incremental manner together with a porous insert associated with the pressure reduction chambers for acoustically damping noise generated during the pressure reduction. The flow control valve includes a valve housing having a valve chamber in direct fluid communication with a fluid inlet and having a plurality of spaced openings through which the fluid inlet communicates with the fluid outlet.

Abstract: This check-valve assembly, adapted to close a fluid flow circuit without creating overpressures or hammering in this circuit, comprises a tubular body (1) connected at both of its ends to a respective pipe section (2, 3), a closure member (4) mounted to be movable inside the body (1) between an open position in which the fluid may circulate in the direction of arrow F1 and a closed position in which the closure member bears against a seat (21) so as to cut off any circulation of this fluid in the direction of arrow F2. According to the invention, the closure member (4) is axially slidably mounted in the body (1) and delimits a cylinder (4a) cooperating with a fixed piston (11) so as to constitute a restraining device which becomes more effective when the closure member approaches its closed position. Simultaneously, the reverse flow of the fluid (direction F2) is progressively limited by passage in a path (24, 25) having a relatively high pressure drop.

Abstract: In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes a pressure reduction chamber for reducing fluid pressure in an incremental manner together with a valve member having a porous insert for acoustically damping noise generated during the pressure reduction. The flow control valve includes a valve housing having a valve chamber intermediate a fluid inlet and a fluid outlet through which the fluid inlet communicates with the fluid outlet. By utilizing these components in the valve, the pressure reduction chamber can be disposed generally intermediate the fluid inlet and valve chamber, and the hollow valve member can be disposed in communication with the pressure reduction chamber, whereby the porous insert in the hollow valve member will further reduce fluid pressure in an acoustically damped manner upstream of the fluid outlet.

Abstract: Low frequency noise and turbulence are reduced in a damper structure by providing a perforate screen extension onto the damper blade so as to extend across the flow path when the damper is open. Additionally, a perforate screen is located immediately downstream of the damper and spaced from the wall so as to define a chamber therewith as well as defining a boundary of the flow path.

Abstract: A plurality of angularly offset orifices (29) are disposed within a fuel line (13) to meter a flow of fuel therethrough. A first set (23) of orifices each have a length (L) (27) and a diameter (D) (31) having a first L/D ratio. A second set (35) of orifices each have a second L/D ratio.

Abstract: A low-noise control valve in which a noise-dampening element (9) is arranged inside of the valve housing (1) in the passageway of the medium. A built-in element, in which lamellas touching one another are arranged over the entire cross section of passage parallel to each other and parallel to the direction of flow serves as noise-dampening element. These lamellas exhibit a linear corrugation, with the directions of the corrugations proceeding obliquely with respect to the direction of flow and the directions of the corrugations of two adjacent lamellas at a time intersecting each other. Favorable sound level reductions are achieved in small installation dimensions. In upper valves, the built-in element can be arranged at the valve cone. In rotary cone valves, it can be designed as a valve seat.

Abstract: Valve which consists of a body (1) provided with a flow passage, of a closing member (2), such as, e.g., a flap, fitted in the flow passage (3) pivotably or turnably and having no passage opening, and, if necessary, of jointly operative sealing members (6) fitted between the closing member (2) and the valve body (1). In the flow passage (3) in the valve body (1), after the closing member (2), at the outlet side of the flow, one or several attenuation member or members (9) are fitted, which are placed one after the other at a distance from each other and from the closing member (2), which the closing member is in the closed position, and which reduce the cross-sectional area of the flow passage (3). The attenuation member or members (9) may be provided with holes or openings (12) passing through them.

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: A control organ for gaseous and liquid media. Inside of a housing, two shut-off elements are arranged in the passageway of the medium. These shut-off elements are designed as pipes (4, 5) arranged in a manner concentrical in each other and at the cylindrical surfaces in leading manner. In each case, one of the pipes (4) is fixedly connected to the housing, while the other pipe (5) is movable in the longitudinal direction. In specified zones of their cylindrical surfaces, the pipes (4, 5) are provided with passage slots (6, 7) which take a parallel course with respect to each other. The passage slots (6) of the pipe fixedly connected to the housing (1) are at an angle which differs from 0.degree. with respect to the passage slots of the immediately adjacent movable pipe (5). The arrangement of the slots (6, 7) in the spherical surfaces is such that in the closed position, the zones of the spherical surfaces of the two pipes (4, 5) provided with slots (6, 7) do not overlap at any place.

Abstract: The rotary control valve comprises a casing having a pair of axially-opposed ports. A valve chamber is rotatably mounted in the casing. A stem adjustably rotates the valve chamber for controlling the flow through the ports. The valve chamber has a pair of axially-opposed, off-center orifices, each being contiguous to and movable into and out of partial and full registration with its associated port. An off-center tube is disposed inside chamber and extends between the orifices. A pressure-reducing medium in the valve chamber. The medium includes a plurality of stacked, axially-spaced discs, each having a pattern of axial holes for dividing the flow thereacross.

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 ballcock is constructed with upper and lower housing members which are joined by a bayonet-type fitting. The juncture of the upper and lower members defines a valve chamber which sits atop the orifice of a vertical inflow tube carrying water from below the lower housing member. A valve in the valve chamber controls the flow of water out of the orifice. The valve includes separate, spaced upper and lower resilient valving members that provide a pressure chamber. Pressure in the chamber is controlled by a spherical-head metering pin passing through apertures in the upper and lower members. A slip-on silencer telescopes over the orifice and defines, with the exterior of the inflow tube, a quieting passage. The quieting passage has an annular intake at the top and terminates below in a pair of downward directed nozzles. The spherical-head metering pin makes a ball-and-socket connection with a lever. The lever is resiliently connected to the upper housing member and operated by a metal rod connected to a float.

Abstract: A control valve includes a valve body with a fluid inlet and a fluid outlet. A valve seat is mounted within the valve body between the inlet and outlet. A valve plug is reciprocally mounted within the valve body to engage the valve seat. A plurality of valve cages are removably mounted on the valve seat and surround the valve plug. The valve cages are mounted to define axial flow galleries. One of the valve cages includes a plurality of apertures and fins that extend radially into a gallery between the first cage and a second cage. The second valve cage is adjacent to and surrounds the first valve cage. The second valve cage includes a plurality of apertures and fins that extend into the gallery area between the second cage and a third cage. The third cage surrounds and is adjacent the second cage. A plurality of apertures are defined in an upper portion of the third cage member.

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: A mixer valve in which a fixed hard material plaque has passage openings which communicate with two feeding pipes, a plastic material control slide is connected to a valve operator, and a movable hard material plaque, rigidly connected to the control slide, cooperates through a portion of its peripheral edge with the passage openings of the fixed plaque, in order to control the delivered liquid flow rate and the mixing ratio of the liquids fed to the valve; the plastic material slide has a series of blades disposed in a comb-like fashion, which extend up to the vicinity of that edge portion of the movable plaque, and at least a part of which corresponds, on the side which is axially opposite the fixed plaque, to a window communicating with the space situated behind the control slide. Preferably, the control slide is guided for a diametrical displacement in a rotary guide ring, and this guide ring in its turn is provided with a series of blades disposed in register with the blades of the control slide.

Abstract: A fill valve for controlling liquid level in a toilet water tank or other tank includes a valve head assembly positioned at a selected level in the tank by a telescoping riser assembly with liquid inlet and outlet conduits extending toward the tank bottom. An adjusting nut on a stationary riser engages thread structures on inlet and outlet conduits for raising or lowering the valve head assembly and adjusting the liquid level. A main valve in the head assembly is controlled by a non-horizontal diaphragm separating a vent chamber and a control chamber. The control chamber is pressurized as liquid rises to the selected level by a standpipe extending downwardly in the tank. The valve closing and opening levels are offset by partly filling the vent chamber with liquid when the main valve is open to hydraulically load the diaphragm. A vacuum breaker valve obstructs backflow through the valve, vents the flow path when the valve is closed, and regulates flow into the vent chamber when the valve is open.

Abstract: A valve trim cage assembly for anti-cavitation control valves comprises a plurality of concentrically nested, cylindrical sleeves with fluid flow constricting annular channels defined between adjacent sleeves. Each sleeve has an indentical multiplicity of radial plenum holes contained therein which serve as expansion chambers, each plenum hole intersecting at least one flow constricting channel to provide tortuous fluid flow paths of alternating expansion plenum holes and constricted annular channels radially through the cage assembly. The cross sectional area of the channels increase from sleeve to sleeve in the direction of fluid flow to provide staged and gradually decreasing pressure reduction as the flow proceeds through the cage assembly. The area of the plenum holes is much greater than the total cross sectional area of all annular channels intersecting the plenum hole such that the channels are always flow restricting and the plenums are expansion chambers.

Abstract: The invention relates to a device for the step-wise pressure release on the expansion of, in particular hot, gases with highly different volume streams. In a device of this type, reaching or even exceeding the speed of sound is to be safely prevented. This is achieved in that at least two adjustable plate valves are arranged in series one behind the other, that the orifice of each plate valve is arranged eccentrically in relation to its central longitudinal axis, with the orifices of successive plate valves each arranged on opposite sides in relation to the rectilinearly extending, continuous central longitudinal axis common to all the plate valves and that the adjustment of the plate valves is effected as a function of the accumulated volume stream.

Abstract: A ballcock is constructed with upper and lower housing members which are joined by a bayonet-type fitting. The juncture of the upper and lower members defines a valve chamber which sits atop the orifice of a vertical inflow tube carrying water from below the lower housing member. A valve in the valve chamber controls the flow of water out of the orifice. The valve includes separate, spaced upper and lower resilient valving members that provide a pressure chamber. Pressure in the chamber is controlled by a spherical-head metering pin passing through apertures in the upper and lower members. A slip-on silencer telescopes over the orifice and defines, with the exterior of the inflow tube, a quieting passage. The quieting passage has an annular intake at the top and terminates below in a pair of downward directed nozzles. The spherical-head metering pin makes a ball-and-socket connection with a lever. The lever is resiliently connected to the upper housing member and operated by a metal rod connected to a float.

Abstract: A throttling ball valve with an array of closed spaced horizontal plates secured across the flow passage through the ball. The leading edges of the plates are streamlined so that the flow stream will be divided into a plurality of laminar flow streams, each with a boundary layer across a surface of the plate. Energy is absorbed in the boundary layer phenomenon. The array of horizontal plates is preferably contained in a cylindrical sleeve which is inserted and secured into the cylindrical flow passageway through the valve ball.

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: The invention concerns a regulator valve for stabilizing volume flow, especially in ventilation systems, with an adjustment flap (4) which is pivotable mounted in a flow conduit (2) and can be adjusted by a variable adjusting motor (12) and with a measuring probe (14) located in the flow conduit (1 resp. 2). In order that a reliable regulation and stabilization of the volume flow is possible independently of the arrangement and of the configuration of the conduit system upstream from the regulator valve, a turbulence grate (6) should be located upstream from the adjustment flap (4).

Abstract: An auxiliary controlled valve including a valve body (8) displaceable against a valve seat (9) disposed in a drilling string (6) to produce pressure pulses in drilling fluid renders possible a selective closing or opening of a low-resistance transmission section (12) which lies parallel to a main throttle section (10). The valve has a central passage which permits the passage of measuring instruments through the valve regardless of the particular position of a valve body (8). The valve body (8) is largely balanced out with regard to dynamic flow forces so that only a comparatively small actuating force is necessary.

Abstract: Apparatus for determining and displaying the temperature of a mixture of two liquid streams, such as hot and cold water mixed in a shower supply line, includes a flow control valve for varying the flow rate of the mixed water independently from adjustment of temperature mixing and control valves. The apparatus includes structure for more uniformly mixing the two streams and for providing improved homogeneity of temperature in the mixture. A baffle is provided at the inlet of the device for redirecting the incoming mixture to a mixing chamber prior to exposure of a thermometer thereto. The flow control valve increases back pressure at the outlet thereby further to improve temperature uniformity of the outlet stream. The apparatus may be installed intermediate existing plumbing connections and does not require the use of specialized shower heads.

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 homogenizer device, in particular for the production of whipped cream, comprising in combination, the following components: an external sleeve and an internal sleeve between which is formed a convoluted labyrinth, the internal sleeve housing a valve element which forms with it a chamber communicating with said labyrinth and with the delivery tube for the base mixture, said valve element consisting of a stem bearing a valve at one of its ends and a valve at its opposite end, the former being a valve for controlling the dispensing of the whipped cream and the latter being a valve for controlling the conduction of the mixture through said labyrinth, said valve element being also translatable against a counteracting spring.

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 fluid flow restrictor for use in a high pressure valve or the like which comprises a series of closely interfitting concentric cylinders alternately attached to the valve seat and an axially movable valve plug of the valve. In one advantageous embodiment of the invention, various arrangements of slot openings are formed through the several cylinders. The slot openings may be of any geometric shape, for example, rectangular or trapezoidal, and are of sufficient volume to act as expansion chambers for a compressible fluid. The openings of each cylinder communicate with the openings of an adjacent cylinder by various overlapping relationships between openings or by viscous friction flow paths between the cylinders to form restricting flow paths therebetween. Axial displacement of the valve plug will move the interfitting cylinders with respect to one another to vary the flow path dimensions between the slot openings of the cylinders.

Abstract: A flexible, resilient anti-contamination baffle having a plurality of interleaved sheets of material. The sheets of material are secured at one end thereof to a surface adjacent an opening to be sealed and have the capability of not only substantially preventing the passage of gaseous contaminants through the opening when the regions adjacent the openings are of substantially the same pressures but also capable of allowing the rapid venting of gases from a region of higher pressure to a region of lower pressure. Additionally, the sheets of material are formed so as to provide a "breakaway capability" allowing the passing of an object through the opening without encompassing or entangling the object as it passes therethrough.

Abstract: An electrohydraulic pressure-regulating valve has a valve housing formed with a chamber and with an intake passage and an outlet passage opening at spaced-apart locations into the chamber, a valve member in the chamber between these locations and formed with a bore through which fluid can flow between the locations, this bore forming adjacent the outlet passage with a valve seat, a valve body in the chamber engageable with the valve seat to block flow through the bore, and means for urging the body against the seat. The valve has a laminar flow throttle in the bore between the seat and the intake passage. With this system substantially greater noise and vibration reduction is achieved in the range about 400 Herz than has been hitherto possible. Since the throttle is constituted as a laminar-flow throttle and is positioned immediately upstream of the valve body and valve seat, it only makes a nominal pressure drop, so that it does not interfere with operation of the valve.

Abstract: A flow control valve having a flow-dividing cage surrounding its plug. The cage includes stacked plates spaced by dependent legs and annular screens in the spaces between adjacent plates.

Abstract: A pressure letdown valve includes a housing with a bore passing therethrough which may be tapered and adaptable of receiving internally a coaxial central tube with tapered outside diameter and also two concentric sets of circular baffles frictionally secured in place within the tapers in an interjacent relationship therebetween and so arranged as to provide an alternating valve and baffle structure with multitude of flow reversals fluid passing through the valve must complete with accomplished throttling of high pressure fluid entering valve bore via a fluid supply port located in the center to proceed by way of central tube into the region of peripherally spaced alternately attached baffles respectively sealing on said bore and said central tube for a large pressure reduction through a process of energy conversion when flowing over the plurality of such baffles to exit at substantially lower pressure via a fluid exhaust port including internal valving means and means for a modular baffle assembly and dis-ass

Abstract: In combination with a reactor for a coal utilization system, a pressure letdown device for accepting from a reactor, a polyphase fluid at an entrance pressure and an entrance velocity, and discharging the fluid from the device at a discharge pressure substantially lower than the entrance pressure and at a discharge temperature and a discharge velocity substantially equal to the entrance temperature and entrance velocity. The device 10 is characterized by a series of pressure letdown stages 28a through 28x including a plurality of symmetrical baffles, designated 30, disposed in coaxially nested alignment, each baffle having defined therein a plurality of ports or apertures 32 of uniform dimensions.

Abstract: An improved variable volume air controller for use in conjunction with a conditioned air distribution system is disclosed which comprises an insulated lined housing having an inlet, an outlet, and a control assembly operative to vary the volume of air flowing therethrough. An air flow diffuser is also provided being positioned in overlying relationship to the inlet opening which operates to substantially improve air flow distribution over the cross sectional area of the housing whereby the control assembly may operate to provide improved relatively noise-free modulation of air flow. Additionally, a stop assembly is provided which cooperates with a portion of the control assembly to limit movement thereof beyond a true full open position as well as to inhibit air flow induced vibration thereof when the control assembly is in a full open position.

Abstract: The invention comprises an injection tank for cleaning boilers and heat exchangers. The tank is pressurized by connection to a potable city water supply. The filling, pressurization and injection of cleaning of treatment materials are carefully controlled by the provision of control and check valves on the inlet and outlet of the tank. An interior perforated tank baffle assures that the treatment materials are fully cleared from the tank during injection and thoroughly mixed with pressurized incoming water. The tank is light and portable without requiring separate powered pressurization means.

Abstract: The improved flow control valve includes a hollow valve body having an inlet and an outlet and a valve member movable therein to control the flow through the valve. The valve also includes an orifice assembly located in the valve body encircling the valve member. The orifice assembly includes a perforated cylindrical member encircling the valve member and a plurality of annular discs encircling the cylindrical member. The discs include both orifice discs and spacer discs. The orifice discs are located between the spacer discs and each orifice disc is provided with a plurality of orifices. Each spacer disc is provided with a plurality of flow ports that are arranged to aligned serially with the orifices which provide a long curvilinear or spiral flow path through the orifice assembly.

Abstract: A device for attenuating noise of fluid in non-axisymmetric turbulent flow which comprises a conduit and a plurality of parallel aligned nested tubes in said conduit. The nested tubes are of varying cross-sectional size and have approximately the same cross-sectional shape. The tubes are eccentrically aligned with respect to each other such that a lower surface of each tube is in closely spaced relationship or is in substantially line contact with a surface of an adjacent tube along their longitudinal lengths, the line contact between all of the tubes being substantially at a common line, allowing for the thickness of the tube walls. A brace extends through and interconnects the nested tubes. In one embodiment, the noise attenuating device is spaced closely downstream from a reverse flow ball valve to provide a smooth transition from the non-axisymmetric flow discharging from the valve to substantially axisymmetric flow (or fully developed pipe flow) in the conduit downstream of the valve.

Abstract: The valve includes a perforated cage and a perforated closed end tube operating as two sequential stages of restriction and pressure drop for the fluid flowing through the valve. A movable plug cooperates with the cage to control the net amount of flow restriction presented to the fluid, and hence to control the pressure drop across the valve and the rate of fluid flow through the valve. The tube perforations are sized to turn back the practical maximum of the first stage noise into the tube, and the latter is lined with material which absorbs a maximum of the turned-back noise. As a result, the level of the noise passing downstream of the valve is minimized.

Abstract: A pinch valve sleeve for reducing the pressure of fluid flowing therethrough with or without actuation of the valve's pinching mechanism. The valve sleeve features an elongated hollow flexible resilient elastomeric sleeve body having an inner surface circumferentially bounding a flow-through passage and peripheral flanges at both ends suitable for attachment to a section of a pipeline or conduit system. The sleeve body has an ingress section adjacent to the inlet opening of the valve sleeve, an egress section at the outlet opening which permits fluid egress, and a pinchable intermediate section situated between the ingress and egress sections. The inner surface of the sleeve body has thereon a plurality of radially-extending, inwardly-directed protrusions operative for impeding fluid flow through the flow-through passage of the sleeve, thus reducing the pressure so that the pressure of the fluid which exits through the outlet opening is lower than the pressure of the fluid entering the inlet opening.

Abstract: A method for attenuating a medium flow passing through a valve provided with a flow passage. Into the valve, a substantially ball-like or ball-segment shaped or conical or cylindrical plug-like closure member has been fitted turnably. The attenuating of the flow has been arranged as taking place in both flow directions mainly in the passage in the closure member or in a bore passing through the closure member. The attenuating effect is increased as the valve is being closed and the attenuating effect is correspondingly reduced as the closure member is being turned towards the open position. In the passage in the closure member or in the bore passing through the closure member, the length of the path of flow of the pressure medium is increased and the direction of the flow of the pressure medium is alternated.

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 lamellate type low noise fluid resistance device comprising a stack of identical segmented ring-shaped plates having alternate sectional openings which, when circularly displaced with one another, form narrow horizontal fluid passages between the inner and outer diameters of said plates; said stack being bolted together with upper means to close the interior stack passage and lower flange means having a central opening and extending radially outward from the stack outer diameter.

Abstract: A sound suppressing fluid handling device wherein a relatively high pressure fluid is conducted through a substantial pressure drop, relatively noiselessly, by passage of the fluid through a myriad of tortuous energy dissipating passages formed between adjacent turns of and opening through the ends of a sound suppressing reel comprising a relatively thin flexible spirally wound band. The preferred inventive embodiment described is a valve comprising a stack of annular discs seating coaxially against the inlet end of the sound suppressing reel and containing passages, formed partly between adjacent discs, for conducting the incoming high pressure fluid from the central opening in the disc stack to the inlet ends of the reel passages.

Abstract: A relief valve (10) having both spring biasing means (116) and air pressure biasing means (114). The spring biasing means (116) includes a plurality of spring washers (132) acting between the valve body (12) and a valve member (74). The air biasing means (116) includes an air cylinder defined by an intermediate portion (20) of the valve body (12), and a piston (118) disposed within the cylinder and acting on the valve member (74). An air inlet port (48) is provided above the piston (118) to permit the area above the piston (118) to be pressurized to add to the biasing force of the spring biasing means (116), and an air inlet port (52) is provided below the piston (118) to permit the area below the piston (118) to be pressurized to open the valve manually for testing and exercising. A "quiet" element (102) surrounds the valve member (74) to reduce the sound level of the fluid flowing through the valve when the valve opens.

Abstract: A sanitary water valve of the disc valve type is provided with a noise damping assembly which is arranged in the recess of a disc is disclosed. The noise damping assembly is preferably in the form of a screen, is arranged and constructed to be self-retaining or self-clipping and requires no latching members for mounting the noise damping assembly with the recess of the disc.

Abstract: A fluid control valve is equipped with a plurality of sleeves nested one within the other to form a cage for pressure reduction between the inlet and outlet ports of the valve housing. Each sleeve is provided with blind bores, through-bores and interconnecting grooves which cooperate to repeatedly divide the flow into more and more partial flows which keep colliding with one another. Volume control is achieved by a slidable piston cooperating with the cage.

Abstract: A valve having stacked disks with alternate circular grooves in the faces thereof to provide a high pressure drop surface in fluid flow transverse to said grooves and ridges. The disks are circular in shape with a circular center opening to provide a central fluid opening when the disks are stacked with the center openings in register. Fluid enters the center opening and flows radially between the adjacent faces of a pair of disks to flow transversely across the continuous circular grooves and ridges.

Abstract: High energy loss fluid control is attained by subdividing flow of high pressure fluid into a plurality of individual streams in respective passageways having a long length to diameter ratio to impart high frictional resistance losses to the fluid flow, the passageways being in and between laminar surfaces and configurated along their lengths. For extremely high efficiency the passageways are in labyrinth formation.