Abstract: A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body includes a rigid piston and solenoid configuration.

Abstract: A purging device is provided for an assembled unit for a vehicle, having both a wheel including a rim and a tire. The purging device has a body connected to the inflation tube of the assembled unit, the body being designed to be subjected to the inflation pressure of the assembled unit, and a piston able to move inside the body. The piston operates an open/close element, fixed to the piston, between a closed position and a purging position of the body, the open/close element being normally closed, the open/close element and the piston each having a face designed to be exposed to the inflation air inside the body in the closed position. The open/close element is opened by the action of an operating force on the piston. Also disclosed is a method for deflating an assembled unit.

Abstract: A hydraulic actuating device for a sliding stem control valve assembly is mounted between a control valve and an actuator housing. The hydraulic actuating device is connected to one of a control valve stem, an actuator stem, and a stem connector and the hydraulic actuating device moves either the control valve stem, the actuator stem, or the stem connector in response to varying hydraulic pressure within the hydraulic actuating device. The hydraulic actuating device may be used to override an actuator of the sliding stem valve during emergency operations, or to provide a backup actuator in the case of a primary actuator malfunction.

Abstract: In one featured embodiment, a piston for a valve comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end. The cylindrical body has a piston bore configured to receive a spring assembly. The cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, and the cylindrical body is defined by a first length that is less than the overall length. A ratio of the first length to the maximum outer diameter is between 1.0 and 1.2.

Abstract: A fluid flow valve includes a movable valve piston positioned in a valve body, the valve piston configured to flow a fluid therethrough. A metering window is interactive with the movable valve piston to meter flow through the movable valve piston. A flow meter is positioned at the valve piston to measure a flow rate of fluid through the valve piston. A valve controller is operable connected to the flow meter and the movable valve piston to control position of the valve piston based on flow rate measured at the flow meter.

Abstract: Fluid control valves having adjustable valve stem and piston assembly are described herein. An example fluid control valve includes a piston to control a flow of fluid through a valve body, a bonnet with a threaded bore coupled to a bonnet yoke to be coupled to the valve body and a housing having a first portion to pivotally mount a roller assembly to move the piston and a second elongated portion with a threaded outer surface to couple to the threaded bore of the bonnet. A valve stem moves through the housing to control the movement of the piston.

Abstract: Methods and systems for operating an integrated actuator are provided. The integrated actuator comprises an actuator body, an extension rod coupled to the actuator body. The extension rod includes a piston valve and is configured for selective movement between a first position in a first mode of operation where the piston valve is fully open and a second position in a second mode of operation where the piston valve is less than fully open. The integrated actuator further comprises a flow body coupled to the actuator body such that the flow body houses the piston valve and a modulation device coupled to the extension rod. The modulation device is operable by movement of the extension rod and is configured to be fully open in the first mode of operation and is configured to be less than fully open in the second mode of operation.

Abstract: Needleless access port valves are generally discussed herein with particular discussions extended to needleless access port valves having a pliant valve piston and/or plug that exudes silicone oil when stressed or squeezed while providing antimicrobial agents within and on the surface of the piston and/or plug. The pliant valve piston may have an integrally formed plug and one or more ports or a separately formed plug located inside a plastic housing. The plug cooperates with a nozzle on the inlet connector assembly to form a slip port or a Luer inlet, which can open when exerted by force to permit flow or closes when the force is removed.

Abstract: A valve skirt is connected to a shaft. The shaft extends in a rearward direction away from the skirt and has rack teeth at a location spaced away from the skirt. A tab is positioned between the skirt and the rack teeth, and has at least one flat surface. A rack support supports the rack for axial movement, and the rack support has a support ear that has a flat surface engaging the flat surface on the rack to prevent relative rotation of the rack when driven by a pinion gear. An air starter valve, a gas turbine engine and a method are also disclosed.

Abstract: A valve is provided for controlling flow along a fluid line that includes an outer shell and an inner housing slidably disposed therein that includes connector threads surrounding a boss on one end and a passage through the boss. A backing member is coupled to the outer shell and has a sealing pin extending into the passage. The inner housing is movable helically relative to the outer shell from a closed position wherein a sealing pin engages an outlet opening at the distal end of the boss to seal the opening and an open position in which the inner housing is directed away from the sealing pin to open a fluid path through the valve. A torque limiter mechanism between the outer shell and inner housing resists movement from the valve closed position to the valve open position until a selected torque level is reached.

Abstract: A valve for injecting fuel includes a valve carrier having a valve seat and an inflow orifice, a valve positioning member, and a flow limiting element that is disposed on the valve positioning member. The inflow orifice includes a step having a peripheral annular edge, and the flow limiting element is disposed on the valve positioning member in such a way that when the valve is opened, a flow area between the annular edge and the flow limiting element is reduced from a first flow area to a second flow area.

Abstract: The invention relates to a device (1) for complete or partial closing-off of a fluid-conveying pipe (2) which is under elevated pressure, wherein the device comprises the following: a pipe connector (3), a close-off element (6), and an actuating apparatus (8) for the close-off element, wherein the close-off element is a solid, unchangeable element which in the non-closing state is received in an extension (5) attached to the pipe connector in order to receive the close-off element, and is movable in a linear manner out of the extension into the pipe connector for the closing state.

Abstract: A vacuum valve includes a valve housing (1) with at least one valve opening (2, 3), at least one valve plate (10, 11) and a carrying unit (9), which carries the at least one valve plate (10, 11). The at least one valve plate (10, 11) is connected to the carrying unit (9) via at least two connecting devices, each having a connecting part (45), with a neck portion (47) and an enlarged head portion (48), which projects in relation to the neck portion (47), and having a receiving part (46, 56?), with a respective receiving slot (49) into which the neck portion (47) of the connecting part (45). In order to prevent the connecting parts (45) from moving out of the receiving slots (49), at least one of the receiving parts (46?) of the connecting devices can be rotated about an axis of rotation (80) from an introduction position, in which the associated connecting part (45) can be introduced into the receiving slot (49), by way of its neck portion (47), as far as the end position, into a blocking position.

Abstract: A vacuum valve includes a valve housing with first and second valve openings, which have parallel axes, a first and a second valve plate, adjustable between an open position, an intermediate position and a closed position, and a carrying unit, which carries the valve plates between the intermediate position, in which the valve plates cover over the respective valve openings, but are raised up from the valve seat, and the closed position, and each include a cylinder, having at least one cylinder space, and at least one piston, arranged in the cylinder space and has a piston rod, connected to one of the valve plates. The carrying unit has at least first and second carrier rods, to which the cylinders of the drive elements are connected. The cylinders each span an interspace located between the carrier rods, arranged on opposite sides laterally alongside the piston rods of the drive elements.

Abstract: A gas pressure control valve having a valve body with a gas inlet and a gas outlet is described. An inner cap is provided bounding in part a chamber within the valve body in communication with the gas inlet. The valve body contains a spring loaded piston. comprising a piston head and a piston rod. The piston rod includes a conduit providing communication between the chamber bounded in part by the inner cap and a chamber adjacent the piston head and the gas outlet. The piston is operable to move between a closed configuration in which the piston rod prevents communication between the gas inlet and the chamber bounded in part by the inner cap and an open configuration in which the piston rod permits communication between the gas inlet and the chamber bounded in part by the inner cap.

Abstract: A female quick-connect coupling element for releasably joining pipes for pressurized fluid having a fluid flow duct and a valve for controlling the flow of fluid through the duct, wherein the valve has a first piston and a second piston that are mounted to move along a common axis (Y-Y?) relative to a body of the female element and wherein the first piston cooperates with a valve seat within the body of the female element, so as to close the valve, while the first and second pistons are interconnected via a mechanical link assembly and each of the pistons defines one of two opposite surfaces in contact with the fluid when the valve is open and wherein the mechanical link assembly is disposed outside the fluid flow duct.

Abstract: The present invention relates to a process for the sterile transfer of fluids, be they liquids or gases. It uses a presterilized device comprised of a body having a bore formed through at least a portion of its interior. Contained within the bore is a movable plunger. The body has a first and a second end. The first end contains a face designed to be attached to the upstream component. The second end is connected to a downstream component such as a filter, pipeline, sample bag and the like. The plunger has corresponding first and second ends. The first end of the plunger when it the closed position is in alignment with the face of the body which combined form a steamable surface and a sterile barrier against the environment to the rest of the interior of the body, the plunger and downstream components. The device is attached to an upstream component and the face and the first end of the plunger are steam sterilized in place.

Abstract: A valve assembly includes a first piston member displaceably disposed within a first chamber. A second piston member is coupled to a valve closure element, such as a diaphragm, and the second piston member is disposed within a second chamber. A longitudinal displacement of the first piston member relative to the first chamber causes hydraulic fluid disposed within the first chamber to longitudinally displace the second piston member such that the valve closure element engages a valve seat to close the valve assembly. The area of the second piston member is greater than that of the first piston member to multiply the force provided by an actuator that displaces a valve stem coupled to the first piston member.

Abstract: An arrangement of a valve in a bore of a duct housing includes the duct housing comprising the bore with a stepped design. A valve housing with a stepped outer diameter comprises an inlet and at least one outlet, and is plugged into the bore of the duct housing. A translational valve rod is arranged in the valve housing. At least one valve-closure member is arranged on the translational valve rod. The at least one valve-closure member corresponds with at least one valve seat. A bore diameter of the bore decreases when viewed from a plug-in direction of the valve housing. The stepped outer diameter forms an interference fit with the bore diameter in regions radially surrounding the at least one valve seat. Other regions of the stepped outer diameter have an outer diameter which is smaller than the respective radially surrounding bore diameter.

Abstract: A flow control valve and method for controlling fluid flow includes a valve housing defining a valve chamber. A port member mounted within the valve chamber receives a reciprocally movable piston/spool assembly. The assembly is engageable with a valve seat for blocking fluid flow through the chamber. The assembly includes a piston body defining an annular recess for receiving an annular seal and a compression bonnet received by the piston body which is operatively engageable with the annular seal. When the assembly is not engaging its associated valve seat, the seal is relaxed and thus reciprocal movement between the assembly and the port member is not substantially hindered or resisted.

Abstract: Apparatus for controlling a pressurized fluid. In accordance with some embodiments, a valve assembly includes a piston moved between closed and open positions. A sealing member is disposed within an annular recess of the piston and characterized as an endless annular ring extending about a central axis of the piston. The sealing member has an elongated circle cross-sectional shape when the sealing member is in an uncompressed state prior to installation in said recess. The cross-sectional shape is defined by parallel top and bottom surfaces having a length L in a direction perpendicular to and intersecting the central axis, and having opposing inner and outer surfaces of a radius R, the inner and outer surfaces respectively facing toward and facing away from the central axis, and wherein the dimensional value of L is at least five times greater than the dimensional value of R.

Abstract: A valve assembly for a dispenser for fluids comprising: a housing having at least an inlet opening and an outlet opening and a further opening connected or connectable to a fluid displacement mechanism, and a valve member comprising two parts translatably disposed within the housing, a first part for closing and opening the inlet and a second part for opening and closing the outlet.

Abstract: The invention relates to a valve comprising a thimble (3), with an opening (3.1) at one end thereof and a plunger (4) arranged inside the thimble (3) and provided with a stopper (4.1) capable of stopping said opening (3.1). The ratio between the diameter (Do) of the passage surface (So) and the depth (P) of said opening is by far higher than 1, and the stopper is capable, in the stopping position, of coming flush with the outer surface (9) of the thimble in the vicinity of said opening.

Abstract: An air valve includes a valve body and a disc configured to engage a seat. An inlet port is upstream from the seat, and an outlet port is downstream from the seat. A stern is connected to the disc, and a piston is connected to the stern, wherein the piston has first and second positions. A chamber is defined at least in part by the piston and the valve body. A clearance between the valve body and the stem has a first cross-sectional area. One or more relief ports provide fluid communication from the chamber through the valve body and have a combined second cross-sectional area that is greater than or equal to the first cross-sectional area. A method for refurbishing the air valve, as previously described, includes increasing the second cross-sectional area greater than or equal to the first cross-sectional area.

Abstract: The invention relates to a lift valve (1; 1.1; 1.2; 1.3), particularly for process technology. The aim of the invention is to design a process valve of the type in question which acts as a lift valve, has a uniform (monolithic or multi-piece) closing part or member, is altogether shorter than all previously known, comparable valves, has a very simple design, and can be used for various embodiments such as check valves, tank bottom valves, or reversing valves. Said aim is achieved by the fact that the closing part (4; 4.1) opens towards the actuator (3; 3*) while the ends of the driving spring (7; 7.1, 7.2) directly or indirectly rest against the actuation rod (4a/4b) and a cover part (3b), respectively, said cover part (3b) delimiting the driving housing (3a) on the side of the driving piston (5; 5*) that faces away from the closing part (4; 4.1).

Abstract: An apparatus for bi-directionally regulating flow of an actuation fluid includes a conduit and a plurality of baffles. The conduit includes a conduit flow channel that extends longitudinally along a centerline between a first conduit end and a second conduit end. The baffles are sequentially non-coaxially arranged in the conduit. Each of the baffles includes a baffle flow channel that laterally tapers and extends, in a longitudinal direction towards the second conduit end, from a first baffle end to a baffle orifice at a second baffle end. The first baffle end is connected to the conduit, and extends laterally across the conduit flow channel.

Abstract: A piston for a needleless valve system comprising a head portion configured to be disposed in the needleless valve system and controlling fluid flow through the needleless valve system. The head portion comprising a continuous top surface, and an opening disposed proximate the continuous top surface, wherein the continuous top surface is non-planar when the opening is in an open position.

Abstract: In accordance with various embodiments, a plug head assembly is provided comprising a ceramic plug head having a frustroconical geometry, wherein the ceramic plug head has a proximal terminus and a distal terminus, wherein the ceramic plug head has a first coefficient of thermal expansion (CTE), a sleeve having a frustroconical geometry conforming to the ceramic plug head and a second CTE, wherein the second CTE is greater than the first CTE, a distal retainer having a frustroconical geometry conforming to the sleeve, the distal retainer having a first engagement portion for engaging the a proximal retainer, the proximal retainer having a second engagement portion for engaging the distal retainer, and a base that couples with the proximal retainer. In addition, thick banded plug heads are provided.

Abstract: In accordance with various embodiments, a plug head assembly is provided comprising a ceramic plug head having a frustroconical geometry, wherein the ceramic plug head has a proximal terminus and a distal terminus, wherein the ceramic plug head has a first coefficient of thermal expansion (CTE), a sleeve having a frustroconical geometry conforming to the ceramic plug head and a second CTE, wherein the second CTE is greater than the first CTE, a distal retainer having a frustroconical geometry conforming to the sleeve, the distal retainer having a first engagement portion for engaging the a proximal retainer, the proximal retainer having a second engagement portion for engaging the distal retainer, and a base that couples with the proximal retainer.

Abstract: The present disclosure is directed to systems and methods which provide a seal-less high temperature and pressure valve for use in many applications.

Abstract: A vacuum relief valve includes: a housing with a central cavity, the housing having a system branch, a vacuum branch, a pilot branch, and an exhaust branch, each of the branches in fluid communication with the central cavity and having a respective port; a piston assembly comprising a first disk located in the pilot branch, a second disk located adjacent the exhaust branch, and a connecting member to which the first and second disks are mounted; and an actuator attached to a pilot seal, the actuator configured to move the pilot seal between a closed position, in which the pilot seal is positioned in and seals the pilot port, and an open position, in which the pilot seal is spaced from and does not seal the pilot port. When the pilot seal is in the closed position, the second disk is positioned on and seals the exhaust port, and when the pilot seal is in the open position, the second disk is spaced from and does not seal the exhaust port.

Abstract: A gas inlet valve (1) for a compressor (64), comprising: a housing (2); a valve device (6) arranged between a gas inlet portion (3) and a gas outlet portion (4), a valve body (57) resting against a valve seat (56) in a sealing manner when the valve device (6) is in a closed operating state, and the valve body (57) being lifted from the valve seat (56) when the valve device (6) is in an open operating state; a piston device (42) which comprises a first piston portion (43) and a second piston portion (44) which is different from the first piston portion (43), the first piston portion (43) being displaceably guided in a first cylinder portion (22) of the housing (2) and the second piston portion (44) being displaceably guided in a second cylinder portion (27) of the housing (2) which is different from the first cylinder portion (22); and a piston rod (38) which is displaceably mounted in the housing (2) and mechanically couples the valve body (57) of the valve device (6) to the piston rod (38), a fluid line (39)

Abstract: A media control valve includes a body, a plunger assembly of multiple components housed in the body with a plunger control valve cap assembly secured to the body for housing a control knob. The body and the plunger assembly include resilient seals between adjacent multiple components of the body and the plunger assembly, respectively, to permit relative movement therebetween. A diaphragm physically isolates and seals the chambers above and below. All of the plunger seals and bushings held within the sleeve. Replacement seals and bushings can be replaced and inspected with relative ease due to the accessibility at both ends of the sleeve. Component parts are assembled using resilient seals to facilitate assembly and repair.

Abstract: A control valve for controlling a pressure fluid, said control valve comprising: a valve housing (10) comprising a valve inlet (P) for the pressure fluid, a control port (A, B) for connecting to an assembly which is to be operated using the pressure fluid, and a valve outlet (TA, TB); a valve piston (20) which can be moved in the valve housing (10) along an axis (R) and which comprises a hollow space (21) through which the pressure fluid can flow from the valve inlet (P) to the control port (A, B); and a filter device (30) which is arranged in the control valve and comprises a filter cross-section (35) which filters the pressure fluid as it passes through it, wherein at least a part of the filter cross-section (35) of the filter device (30) is situated in the hollow space (21) of the valve piston (20).

Abstract: A discharge valve including a tubular, valve seat and a valve guide disposed above the valve seat. The valve guide has a discharge passage plug and a guide rod that is affixed to, and projects downwardly from, the bottom of the plug. The valve guide also has an interiorly threaded, lifting sleeve that is affixed to, and projects upwardly from, the top of the plug. A piston is disposed between the valve seat and the valve guide. The piston has a conical, head portion for engaging the top of the valve seat, and a stem portion that is affixed to, and extends upwardly from, the head portion. The stem portion has a longitudinal socket within which the guide rod is slidably received. The stem portion also has a number of apertures that intersect the socket for providing pressure relief to the socket. A compressed spring is disposed between the valve guide and the head portion of the piston for normally retaining the head portion in engagement with the valve seat.

Abstract: A drain valve includes an inlet plenum, a first orifice downstream from the inlet plenum, a second orifice downstream from the first orifice, and a fluid passage between the first and second orifices. A piston having a first position and a second position has a first surface area exposed to the fluid passage when the piston is in the first and second positions and a second surface area exposed to the inlet plenum when the piston is in the second position.

Abstract: A purge valve for a mounted assembly for a vehicle consisting of a wheel comprising a rim and of a tire, the valve comprising a body associated with the rim and a piston able to move with respect to the body between a closed position and a purge position and the valve being normally closed. The opening of the valve is obtained by the moving of the piston into the space radially external to the rim, the opening being obtained by action of a control force on the piston, exerted from the space radially internal to the rim, and provided by compressed air led from the space radially internal to the rim to the radially interior surface of the piston and the compressed air led from the space radially internal to the rim to the radially interior surface of the piston being at a pressure lower than or equal to that of the mounted assembly.

Abstract: A piston-type flush valve comprises a housing configured with a fluid inlet port and a fluid outlet port being in flow communication with one another through a flow port, and a piston assembly axially displaceable between a normally closed position in which the flow port is sealed, and an open position. The piston assembly comprises a control chamber which responsive to pressure differential is configured for displacing a sealing assembly from an open position in which fluid flow is facilitated through the flow port, into the normally closed position, and an actuator configured for selectively draining the control chamber into the fluid outlet port, resulting in displacement of the piston assembly into the open position. The control chamber is sealed from the fluid inlet port by a control chamber seal, sealingly displaceable against an anti-friction sleeve articulated to the housing.

Abstract: Fluid valves having dynamic valve trim joints are described. An example apparatus for use with a fluid valve includes a body configured to retain a cage of a fluid valve. Additionally, the example apparatus includes a plurality of projections projecting from and radially spaced about an exterior surface of the body. Each of the plurality of projections is to provide one or more contact points between the body and an inner surface of a bonnet coupled to the fluid valve.

Abstract: A valve signature diagnosis and leak testing device includes a spool valve operatively connected to a pilot valve, the pilot valve being configured to position the spool valve to one of an open position and a closed position. A blocker valve is fluidly connected to a control fluid outlet of the spool valve. An electrical module is operatively connected to the pilot valve, a supply of control fluid, and the blocker valve, the electrical module being capable of sending pulsed electrical signals to the pilot valve and the blocker valve to selectively position the spool valve and the blocker valve to an open or closed position.

Abstract: A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.

Abstract: A constant volume combustion chamber, combustor, and method for constant volume combustion involve combusting a fuel in a chamber sealed by a pintle having a conical portion fitted into a conical nozzle throat and pulling the pintle away from the nozzle throat to allow combustion products to exhaust through a nozzle outlet. The shapes and surfaces of the pintle and nozzle throat provide for sealing the chamber at high pressures while resisting surface wear. Operational parameters for the combustor may be computer controlled in response to measured pressures and temperatures in the combustor.

Abstract: A vehicle hand control brake valve includes a piston, positioned based on an engagement of a vehicle parking brake, a service brake actuation valve, and a control mechanism. The control mechanism mechanically interacts with the service brake actuation valve to set a position of the service brake actuation valve. A level of actuation of vehicle service brakes is set based on the position of the service brake actuation valve. The service brake actuation valve is set to a position to actuate the service brakes when the control mechanism is set to a latch position. The control mechanism only is latched in the latch position when the vehicle parking brake is engaged.

Abstract: A media control valve has a valve body having a media inlet and a media outlet and a plunger which is positioned within the valve body. The plunger is connected to a metering control assembly in the bore of the valve body and can be removed without disturbing the control assembly. A sleeve is positioned in the valve body between the valve body and the plunger. The sleeve includes an integral seal for sealing the valve to a flow device such as a base. The valve stem or post for housing the control knob may have metering marks for visually indicating the position of the plunger relative to the sleeve. The control knob on the valve is aligned with the metering marks on the valve body, whereby the valve opening may be calibrated by visual indication of the alignment of the metering marks with the lower edge of the control knob.

Abstract: The invention provides devices that are attached to an extruder making the operation thereof more efficient and convenient and allowing for a quick change over of parts used to make various products prepared in the extrusion process. A high pressure relief assembly is attached to the extruder that allows for the rapid release of pressure from the extruder at the end of the process by venting product under pressure from the extruder and the extruder also has attached thereto a quick assembly locking device that allows for the exchange of assemblies, such as a density control assembly and other assembles, without the removal of nuts, bolts, and clamps by attaching the assembly to an arm that can be moved in and out of place in front of the extruder and wherein the device has a locking mechanism that seals and releases the assembly from the extruder.

Abstract: A steam valve is provided including a chest, a lock, a spindle, and a strainer. Each of these components is made of specific Ni alloys combinations that enable the valve to operate at temperatures above 650° C. with a good service life.

Abstract: An air intake device for an engine is provided that includes a bypass (20) connected to an air intake path (2) while bypassing a throttle valve (5), and a bypass valve (V) for controlling the degree of opening of the bypass (20), the bypass valve (V) being formed from a tubular valve chamber (15) having its interior opening on the upstream side of the bypass (20) and having an inner face with a metering hole (16) opening toward the downstream side of the bypass (20), and a valve body (25) slidably but non-rotatably fitted into the valve chamber (15) and opening and closing the metering hole (16), wherein an inner face (A) of the valve chamber (15) on which the metering hole (16) opens and an outer face (B1) of the valve body (25) opposing the inner face (A) and covering the metering hole (16) are formed in the same shape so as to enable them to be in intimate contact with each other, and other inner (A) and outer faces (B2) of the valve chamber (15) and the valve body (25) are formed so that there is a gap (g

Abstract: A hydraulic pressure valve apparatus includes a housing of which a first chamber and a second chamber are formed therein, wherein a diameter of the second chamber is bigger than that of the first chamber, a first piston disposed within the first chamber, an elastic portion disposed within the first chamber for elastically supporting the first piston and a second piston disposed within the second chamber and connected to a valve.

Abstract: A flow control device is provided with a first body having a first port through which pressure fluid is supplied, and a second body which is installed on the first body. A valve mechanism which controls the circulation state of the pressure fluid that circulates from the first port to a second port is provided inside this first body. Furthermore, a first connecting section of the first body is inserted into and engaged with the inside of a second connecting section formed at the upper end of the second body, resulting in the first body and the second body being integrally connected together.

Abstract: A pressure relief valve for use in regulating discharge fluid pressure of a pump includes a casted, metal material housing including a passage therein along a longitudinal axis and inlet and outlet ports substantially perpendicular to the longitudinal axis and each having walls that are at an angle less than perpendicular to the longitudinal axis wherein the angle of the wall from being perpendicular to the longitudinal axis is substantially equal to the draft angle from the casting of the housing. A first wall of the outlet intersects with the wall of the passage of the pressure relief valve. A valve body disposed in the passage is movable in the passage against the biasing force of a spring biasing the valve body in a first or closed direction wherein the inlet port and the outlet port are disconnected, until the force at the inlet applied to the valve body overcomes the biasing Force of the spring and the inlet fluid is communicated through the passage and to the outlet.