Abstract: A valve plug adapted for sealing engagement with a seat ring. The valve plug includes a cylindrical body with an annular flange having a groove. A pair of bores is disposed in the body, each bore having a first diameter, a first end, and a second end disposed within the body. Each bore is also adapted to receive a fastener to couple the valve plug to a mounting portion, and a recess is disposed at the second end of the bore, forming a stepped portion. The recess is adapted to receive at least one of a portion of a retainer or a portion of the fastener. A sealing disk is disposed within the groove of the annular flange and is one of a machined sealing disk or a molded sealing disk.

Abstract: In a pressure reduction valve device, a valve body and a distal end portion of a support member are accommodated in a valve accommodation hole of a body. The distal end portion is inserted through an urging member accommodation hole. An inner introduction passage is formed between an outer peripheral surface of the distal end portion and an inner peripheral surface of the urging member accommodation hole. An outer introduction passage is formed between an outer surface of the valve body and an inner surface of the valve accommodation hole. The support member is provided with communication holes that establish communication between a gas inlet provided through the body and the valve accommodation hole in an axial direction. The inner introduction passage and the outer introduction passage are opposed, in an axial direction thereof, to the communication passage.

Abstract: A minimal lubrication device including a lubricating fluid storing tank, conduit for supplying the lubricant pressurized to at least one modular element. The at least one modular element including a lubricating fluid conduit intercepted by flow regulator and compressed air conduit, such conduits fluidically connected to air and lubricant mixing element. The flow regulator including a shutter that can be at least partially housed in calibrated hole and movable between upper and lower stroke position ends. The calibrated hole in fluid communication, on one side, with pressurized lubricant delivery and, on the other side, with the mixing element. The shutter having at least one conical profile portion insertable in the calibrated hole. The conical profile portion has a surface groove facing a surface defining the calibrated hole at least when the shutter is in an intermediate position between the lower and upper stroke position ends.

Abstract: A valve plug adapted for sealing engagement with a seat ring. The valve plug includes a cylindrical body with an annular flange having a groove. A pair of bores is disposed in the body, each bore having a first diameter, a first end, and a second end disposed within the body. Each bore is also adapted to receive a fastener to couple the valve plug to a mounting portion, and a recess is disposed at the second end of the bore, forming a stepped portion. The recess is adapted to receive at least one of a portion of a retainer or a portion of the fastener. A sealing disk is disposed within the groove of the annular flange and is one of a machined sealing disk or a molded sealing disk.

Abstract: A balanced port pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway, an orifice being disposed between the fluid inlet and the fluid outlet. A valve seat is disposed within the fluid passageway. A valve plug is also disposed within the fluid passageway. A piston is disposed within the valve body, the piston separating the fluid passageway from a balancing chamber. A sleeve extends away from the piston, the sleeve forming a balancing passage that fluidly connects the fluid passageway with the balancing chamber. The sleeve includes an open end that terminates within the orifice. By terminating within the orifice, the open end of the sleeve generates boost only towards the end of a valve opening cycle when the valve plug approaches a fully open position, which is where boost is most needed.

Abstract: A humidifier for a fuel cell includes a membrane module which accommodates therein a humidifying membrane, a first cap unit coupled to one side of the membrane module and supplies supply air to the membrane module, a second cap unit coupled to another side of the membrane module and discharges humidified air introduced from the membrane module, and a bypass tube provided in the second cap unit and bypasses condensate water introduced into the second cap unit to the membrane module.

Abstract: A pressure relief valve includes a valve element having, at one end, a flow restricting head and, at an opposed end, a damping head. The damping head includes a damping channel formed therein to allow fluid flow between an inlet chamber and a damping chamber of the valve.

Abstract: A self-adjustable valve or flow control device for controlling the flow of a fluid from one space or area to another by exploiting the Bernoulli principle, to control the flow of fluid, such as oil and/or gas including any water, from an oil or gas reservoir and into a production pipe of a well in the oil and/or gas reservoir, from an inlet port on an inlet side to an outlet port on an outlet side of the device. The valve includes a movable valve body arranged to be acted on by a temperature responsive device. The valve body is arranged to be actuated towards its closed position by the temperature responsive device in response to a predetermined increase in temperature in the fluid surrounding and/or entering the valve. The temperature responsive device includes an expandable device including a sealed structure at least partially filled with an expandable material.

Abstract: A metering and well selection valve group, comprising a rotary type metering distributor with multiple shells; after entering the shells, an elbow extends from one side of shells; the part of elbow positioned in the shells is provided with filtering holes. Filtered fluid outlets are provided on the shells. Multiple check and stop dual purpose angle valves are corresponding to the quantity of shells, each one has a valve with an inlet pipe, a valve stem, a valve base, a valve element is provided on the inside of valve base, a handwheel is mounted on the outer end of valve stem. A first spring is mounted between the spring stop and the valve element. The outlet pipe of filtered fluid is communicated with the outlet of filtered fluid on the case body on the rotary metering distributor. Through the first valve, the extended part of elbow is communicated with the blocking removal fluid outlet chamber on the case body on the rotary metering distributor.

Abstract: A pressure regulator (100) is provided. The pressure regulator (100) includes various features that reduce the risk of internal leaking The pressure regulator (100) includes a regulator body (101) including a fluid inlet (107) with a valve seat (106) and a fluid outlet (108) and a cap (102) coupled to the regulator body (101). The pressure regulator (100) also includes a diaphragm (103) with a first side (103a) exposed to the fluid inlet (107) and the fluid outlet (108) and a second side (103b) exposed to the cap (102). The diaphragm (103) can frictionally engage the regulator body (101) to form a fluid tight seal. Additionally, the diaphragm (103) may include a socket (118) formed in the diaphragm (103) and a valve member (105) including a valve stem (110) with a ball (118) that is adapted to engage the socket (118) formed in the diaphragm (103) in order to couple the valve member (105) to the diaphragm (103).

Abstract: A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.

Abstract: A valve plug comprising a cylindrical body having an annular flange with a top surface, a bottom surface, and a circumference is disclosed. The valve plug further comprises an annular recess disposed in the bottom surface of the flange, and a plurality of holes disposed in the top surface of the flange. Each hole extends into the recess to create a plurality of channels extending between the bottom and top surfaces of the flange. Each channel of the plurality of channels includes a stepped portion. A polyurethane sealing member is disposed within each channel and includes: a top portion forming a continuous bond on the top surface and along the circumference of the flange; a central portion forming a horizontal bond on each stepped portion; and a bottom portion forming a sealing surface adapted to sealingly engage a seating surface of the seat.

Abstract: An irrigation sprinkler and sprinkler nozzle assembly including a self contained pressure regulator and flow control ring, which can be assembled with a desired spray deflector, shrub bubbler or rotating stream distributor on the top of the nozzle assembly. The pressure regulator housing is incorporated into the center of the nozzle assembly and includes a reference pressure chamber connected to atmospheric pressure with a spring bias enclosed to bias a pressure responsive movable member that is connected to an upstream pressure balanced flow throttling valve. A combination deflector pop-up pressure regulating mechanism housed in the filter of the nozzle housing assembly is also shown.

Abstract: A device (1; 101) for controlling the flow of a fluid through a conduit (2; 102; 402; 602; 702) from an upstream side (3; 103; 703) to a downstream side (5; 105; 405; 605; 705), the device (1; 101) comprising: a valve having a valve member (14; 114; 414; 514; 614) arranged to move reciprocally selectively to open and close one or more valve apertures (10; 110; 412; 512; 611, 612), thereby controlling flow of the fluid from the upstream side (3; 103; 703) to the downstream side (5; 105; 405; 605; 705); and means for introducing a reference pressure (24; 124; 324; 424; 524; 624); wherein said valve member (14; 114; 414; 514; 614) is acted on by the pressure of the downstream side (5; 105; 405; 605; 705) and the reference pressure so as to be moved by the difference between said pressures.

Abstract: A gas pressure regulator is disclosed that includes a reciprocating piston that engages and disengages from a seat to open the higher pressure and lower pressure sides of the regulator to one another. The regulator includes an elastomer seal between the seat and the piston that has an ignition rating sufficient to avoid combustion in the presence of oxygen at pressure differentials that are a factor of between 5 and 10 between the higher pressure and lower pressure sides of the regulator.

Abstract: A pressure regulator is disclosed having a body, a valve seat dividing a cavity of the body into first and second portions, and an end stop movable against a bias to selectively engage the valve seat and isolate the first and second portions. The pressure regulator may also have a first inlet port in the first portion, a first outlet port in the second portion and in fluid communication with the first portion via the valve seat, and a second inlet port in the second portion. The fuel system may also have a valve element in the second portion and movable against a spring bias based on a pressure difference between an open position and a restricted position against the end stop. The fuel system may additionally have an actuator biased to urge the valve element toward the second position and selectively actuated to move away from the valve element.

Abstract: A control valve configured to control a pressure of a passing fluid includes: a valve seat having a seat portion where the fluid passes; a poppet valve inserted into the valve seat to regulate a pressure of the fluid passing through the seat portion; and a fluid rectifying unit provided in the valve seat to rectify the fluid having a pressure regulated by the poppet valve.

Abstract: A regulating valve includes a regulating-valve-high-pressure connector, a regulating-valve-low-pressure connector, and a regulating-valve-pressure-reducing device. The regulating-valve-pressure-reducing device includes a regulating-valve-high-pressure chamber coupled to the regulating-valve-high-pressure connector, a regulating-valve-low-pressure chamber coupled to the regulating-valve-low-pressure connector, and a regulating-valve-high-pressure regulator coupled to the regulating-valve-high-pressure chamber and the regulating-valve-low-pressure chamber to maintain the regulating-valve-low-pressure chamber at a constant pressure. The regulating valve further includes a pressure gauge coupled to the regulating-valve-low-pressure chamber.

Abstract: It is proposed to design a fluid flux regulating unit, comprising a first fluid port, a second fluid port and a valve comprising a movable valve part and at least one fluid pressure balancing means, wherein the fluid pressure balancing means comprises a surface in fluid communication with the first fluid port, which has a surface normal vector at least partially in parallel to the moving direction of the movable valve part.

Abstract: A method of collecting data in a field device includes receiving indications of variables for which data is collected, receiving indications of trigger events to trigger collection of data, receiving threshold values associated with each of the trigger events, monitoring the trigger events, and initiating data collection when at least one of the trigger events crosses one the threshold values associated with the corresponding trigger event. A method of tuning a PID controller in a field device includes setting a limited range for selecting a value for a control parameter of the PID controller, selecting the value of the control parameter, wherein the selected value is constrained to be within the limited range, transmitting the selected value to the field device, obtaining, from the field device, a measurement of a response of the field device to a setpoint change, and displaying the obtained response measurements to a user.

Abstract: The present disclosure provides a spring controlled valve including a spring being movable between an expanded position wherein coils of the spring are spaced apart from one another thereby permitting gas flow through the valve and a compressed position wherein the coils are in contact with one another thereby substantially preventing gas flow through the valve.

Abstract: An aircraft refuelling system of an aircraft is provided. The refuelling system comprises a refuelling connector (34) mounted as part of the aircraft and configured to detachably connect to the fuel outlet (2) of a fuel supply apparatus separate from the aircraft, and a fuel pressure regulator (36) having an inlet in communication with a fuel inlet (35) of the refuelling connector (34) and having an outlet in communication with refuelling pipework (39) of the aircraft. The fuel pressure regulator (36), regulates the pressure of fuel in the refuelling pipework (39) when fuel is being passed into the refuelling pipework (39) from the fuel inlet (35) of the refuelling connector.

Abstract: A pressure reducing valve has a seal member, which is mounted on a side wall of a piston. The seal member is arranged between a first ring and a second ring. Consequently, depending on the direction of displacement of the piston, the first ring or the second ring is positioned on one of a displacement direction upstream side or a displacement direction downstream side of the seal member. The first ring and the second ring are made of a resin material, for example a polytetrafluoroethylene resin or a polyetheretherketone resin, having lower coefficient of friction compared with that of the seal member.

Abstract: A pressure reducing valve has a valve rod with a valve element member fitted over the valve rod. A fluid discharging structure is defined in an outer wall surface of the valve rod, or in an inner wall surface of the valve element member that surrounds the outer wall surface of the valve rod, for thereby discharging a fluid that has entered between the valve rod and the valve element member, into a valve hole.

Abstract: A drain valve comprising: a head; and a cantilevered spring coupled at one end to the head and at an opposite end to a portion of a drain system such that when the cantilevered spring is biased to a normally closed position, the head obstructs a hole. In some embodiments, the drain valve is installed in an aircraft fire suppression system. In yet other embodiments, the cantilevered spring has a variable radius serpentine cross section.

Abstract: A back pressure valve comprises a pressure regulator housing affixed to a pressure controller housing and a diaphragm disposed between the pressure regulator housing and the pressure controller housing. In one aspect, the back pressure valve includes a valve member moveable between a fully open position and a fully closed position. The pressure regulator housing includes an inlet chamber communicating with an outlet chamber through at least one fluid passage in a sleeve. The valve member includes a stem connected to a valve head. The valve head includes an outer surface that is received and guided during movement by an inner surface of the sleeve. The outer surface of the valve head includes an upper outer surface and a lower outer surface separated by a cavity adapted to receive a sealing element. Upper and lower outer surface of the valve head provide stability to the valve member during opening and closing of the back pressure valve.

Abstract: A gas vent for a landfill includes a sub-surface gas collection manifold for collecting sub-surface gas from beneath a geomembrane. Preferably, the collection manifold includes a plenum for receiving sub-surface gas. A conduit is connected to and extends upwardly from the plenum, with the conduit communicating with the interior volume of the plenum and having an upper discharge end. The conduit is adapted and provided for communicating sub-surface gas from within the interior volume of the plenum through the geomembrane. A low-pressure relief valve is operative for opening when positive pressure exists within the conduit. The low-pressure relief valve comprises a valve membrane normally resting upon a seat and which is lifted off the seat by low positive pressure.

Abstract: A pressure regulator includes a housing having an upper housing portion and a lower housing portion, the lower housing portion defining an annular recess and the upper housing portion having a bottom surface, an annular protrusion extending from the bottom surface, a diaphragm disposed between the upper housing portion and the lower housing portion, the diaphragm including an outer lip having a first thickness, a flexible connecting section connected to the outer lip and having a second thickness smaller than the first thickness, and an annular inner section connected to the flexible connecting section, the outer lip having a bottom surface disposed in the annular recess and a top surface, and the protrusion being pressed into the top surface so that the outer lip seals between the upper housing portion and the lower housing portion.

Abstract: An irrigation sprinkler is provided having a nozzle and a flow control device for reducing fluid flow through the sprinkler when the nozzle is removed, such as might occur due to vandalism. The flow control device is coupled to the nozzle and is moveable between a first irrigating position and a second signaling position. In the first position, the sprinkler discharges fluid for irrigation. In the second position, the sprinkler discharges a reduced amount of fluid and signals that the nozzle has been removed and should be replaced. The flow control device also allows sufficient fluid flow for flushing debris out of the sprinkler when a flush cap is mounted to the sprinkler, instead of the nozzle.

Abstract: Embodiments of the invention provide a vibration damping system including a fixed element, a moveable element arranged to move linearly along an axis relative to the fixed element in response to a non-mechanical force, and an inerter element coupling the moveable element to the fixed element, and configured to convert the linear motion of the moveable element into rotational motion about the axis. The vibration damping system may be applied to many types of valves. In some embodiments, the vibration damping system may be applied to pressure relief valves. In some embodiments, the moveable element rotates to provide inertial damping. In other embodiments, the inerter element rotates to provide inertial damping.

Abstract: Embodiments of the invention provide a vibration damping system including a fixed element, a moveable element arranged to move linearly along an axis relative to the fixed element in response to a non-mechanical force, and an inerter element coupling the moveable element to the fixed element, and configured to convert the linear motion of the moveable element into rotational motion about the axis. The vibration damping system may be applied to many types of valves. In some embodiments, the vibration damping system may be applied to pressure relief valves. In some embodiments, the moveable element rotates to provide inertial damping. In other embodiments, the inerter element rotates to provide inertial damping.

Abstract: A pressurized gas containing system has a cowling and mounting ring which supports a valve and regulator on a cylinder containing gas under pressure.

Abstract: A hydraulically actuated regulating valve for a vehicle brake system includes a first fluid port, a second fluid port, and a control chamber. A longitudinally movable plunger with a sealing geometry is loaded with a spring force and held in an initial position by a compression spring. A pressure built up in the control chamber acts counter to the compression spring and moves the plunger with the sealing geometry from the initial position into an end position. The sealing geometry interacts with a valve seat which is positioned in a valve body in order to limit an effective pressure at the second fluid port to a predefined maximum pressure value. A fluid connection between the first and second fluid port is completely opened up to a corresponding vehicle brake system in a first end position of the plunger and is completely closed in a second end position of the plunger.

Abstract: A fluid pressure regulating device is i) provided with a pressure regulating member that forms a pressure regulating chamber inside a housing having introduction side and discharge side fuel passages, and communicates these passages according to introduced fuel pressure, and ii) is able to regulate the fuel pressure introduced into a fuel passage to a set pressure. The housing is provided with outer and inner annular valve seat portions that separate the fuel passages inside the pressure regulating chamber, and form another fuel passage inside the pressure regulating chamber. Different clearances are set between the pressure regulating member, and the outer annular valve seat portion and the inner annular valve seat portion, such that when the pressure regulating member abuts against one of the valve seat portions, a small gap is formed between the other valve seat portion and the pressure regulating member.

Abstract: A water pressure regulator includes a sealing member and a body having a diaphragm assembly. The diaphragm assembly is positioned and secured within the body to define first and second chambers. The diaphragm assembly has a force acting thereon from within the second chamber. The first chamber defines first and second zones and first and second passageways therebetween. An inlet of the body is configured to provide water to the first zone and an outlet of the body hi configured to deliver water out of the second zone. The sealing member is positioned within the first zone. The water pressure regulator further includes one or more plugging members for plugging/unplugging the first and second passageways, thereby controlling the operation of the water pressure regulator. The water pressure regulator may be used in a watering system.

Abstract: A disc assembly for a fluid flow control device includes an annular disc member, a disc holder, a relief bore, at least one branch passage, and an annular recess formed in the disc holder. The relief bore is formed in a first side of the disc holder along a central axis of the assembly. The annular recess is formed in the first side of the disc holder and is disposed coaxially with the relief bore for accommodating at least a portion of the annular disc member. The at least one branch passage is formed in the disc holder and provides fluid communication between the relief bore and the annular recess such that during use pressurized fluid that accumulates in the annular recess between the disc member and the disc holder can be relieved through the relief bore via the branch passage.

Abstract: A control assembly for a fluid flow control device includes a control element, a load spring, and a spring clip. The control element can be movably disposed for controlling fluid flow, and the load spring biases the control element into a predetermined position. The spring clip contacts the load spring at a plurality of points to dampen vibrations experienced by the load spring, thereby reducing and./or eliminating resonance. The spring clip includes a body plate and first and second opposing arm plates extending away from the body plate. Each arm plate includes a proximal end adjacent the body plate, a distal end spaced away from the body plate, and a finger extending upwardly away from the distal end. A corner at an intersection between the finger and the distal end includes a contoured edge for facilitating attachment of the load spring to the spring clip.

Abstract: A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.

Abstract: A pressure regulating valve includes a housing having a valve inlet and a valve outlet. A movable piston is located in the housing, and a position of the piston is determined by a selected difference between and inlet pressure and an outlet pressure. The movable piston at least partially defines one or more flow channels between the valve inlet and the valve outlet. When the movable piston is in a fully open position, an axial inlet opening at an inlet end of the one or more flow channels is smaller than an radial depth of the one or more flow channels at the inlet end of the one or more flow channels.

Abstract: A pressure shut-off valve unit for a pressure accumulator vessel. A valve housing has a valve chamber with an accumulator region, an intake opening and an outlet opening facing the pressure accumulator vessel. A piston has at least one axial connecting channel, a first effective piston surface facing an inlet region of the valve chamber and a second effective piston surface adjacent to the accumulator region, the piston being axially movable via a change in pressure of the accumulator region of the valve chamber. Sealing elements are arranged in the valve chamber and which are configured to guide in an axially movable manner the piston. A sealing body of the at least two sealing elements or the valve housing form a valve seat, and a passage opening arranged between the intake opening and the outlet opening is reversibly closed and opened via a change in pressure of the accumulator region of the valve chamber. In a unpressurized state, the passage opening is kept open by at least one spring.

Abstract: A valve system designed to regulate the flow of fluids for pressure regulation systems. The valve is defined by a plurality of valve elements in the form of overlapping and interlocking valve blades that can retract and close on command, and defining a central aperture having an adjustable dimension dependent upon the relative positioning of the plurality of valve elements as they are selectively oriented between an open and closed position. The central aperture at least partially defines a free, unobstructed flow path of fluid in pressure regulation applications. The valve system can be driven mechanically or electronically. A mechanical valve control assembly can be comprised of any combination of components that facilitate the operation of said assembly. An electronic control assembly ideally comprises a plurality of sensors each transferring sensor signals to a central processing unit and Shutter Valve driver assembly for purposes of controlling the operation of the pressure regulation system.

Abstract: Shut-off valve for a pressure accumulator vessel for a medium, wherein a valve housing has a valve chamber with an intake opening and an outlet opening facing the pressure accumulator vessel, a movable piston, and at least one spring, wherein the piston has at least one axial connecting channel and is guided in an axially movable manner by at least two sealing elements arranged in the valve chamber, wherein a first effective piston surface of the piston, the first effective piston surface facing an inlet region of the valve chamber, and a sealing body form a valve seat, and wherein, by changing the pressure in an accumulator region of the valve chamber, the accumulator region being adjacent to a second effective piston surface, the piston is axially movable and a passage opening arranged between the intake opening and the outlet opening may be reversibly closed and opened, wherein, in the unpressurized state, the passage opening is kept open by the spring.

Abstract: A pressure regulator is disclosed having a body, a valve seat dividing a cavity of the body into first and second portions, and an end stop movable against a bias to selectively engage the valve seat and isolate the first and second portions. The pressure regulator may also have a first inlet port in the first portion, a first outlet port in the second portion and in fluid communication with the first portion via the valve seat, and a second inlet port in the second portion. The fuel system may also have a valve element in the second portion and movable against a spring bias based on a pressure difference between an open position and a restricted position against the end stop. The fuel system may additionally have an actuator biased to urge the valve element toward the second position and selectively actuated to move away from the valve element.

Abstract: A pressure regulator is disclosed for use with a dual fuel engine. The pressure regulator may have a body, a cavity formed in the body, a first inlet port in fluid communication with a first end of the cavity, a first outlet port in fluid communication with the first end of the cavity, and a second inlet port in fluid communication with a second end of the cavity. The pressure regulator may also have a valve element movable based on a pressure difference between the first and second inlet ports to any position between a first fully open position at which fluid is allowed to flow from the first inlet port through the first outlet port substantially unrestricted by the valve element, to a second fully restricted position at which fluid flow from the first inlet through the first outlet port is blocked.

Abstract: A flow valve that maintains a constant flow valve despite varying pressures at its inlet, comprising: (a) an elongated cage with alternating axially-extending pockets and ridges on its inner surface; and (b) an elongated generally conical shaped elastomeric sleeve received within the elongated cage; wherein the sleeve flexes outwardly at higher pressures, thereby decreasing the size of the flow channel between the sleeve and cage, thereby restricting flow to maintain constant flow valve despite varying inlet pressures.

Abstract: A choke is provided. The choke includes a trim that includes, in one embodiment, a wedge-shaped member (“wedge”) and a cage with an opening for receiving the wedge. The wedge includes a first surface and a second surface that is angled with respect to the first surface. As the wedge is positioned into the opening of the cage, the space between the second surface and a third surface inside the opening forms a throttling orifice that restricts the flow of fluid. The size of the throttling orifice is variable depending on the position of the wedge relative to the cage. In another embodiment, the trim provides a positive shut-off point that is separate from the throttling area. Additional systems, devices, and methods are also disclosed.

Abstract: In one featured embodiment, a sleeve for a valve includes a sleeve body surrounding a center axis and defined by an overall length extending from a first end to a second end. The sleeve body has a central bore extending from the first end to the second end. The central bore has a first surface portion comprising a piston contact surface that is defined by a first inner diameter, wherein the piston contact surface is configured to slide against a piston to be received within the central bore. In one example, a ratio of the overall length to the first inner diameter is between 3.51 and 3.63.

Abstract: A high flow pressure regulator valve is disclosed having an integral pilot valve. The disclosed valve includes a pressure regulating portion including inlet and outlet ports, a valve seat, valve disc and a spring for biasing the valve disc into engagement with the valve seat. The valve also includes a pilot valve portion positioned on the flow regulating portion. The pilot valve portion includes a pilot spring, a diaphragm and a pusher post. One end of the pusher post is positioned toward the diaphragm and a second end is disposed within an annulus region. The valve further includes a pressure path that enables selective fluid communication between the outlet port, the annulus, an inner chamber region disposed beneath the diaphragm, and an intermediate chamber disposed above the valve disc.

Abstract: A brake cylinder maintaining may include spool valves or poppet valves. When the pressure in the brake cylinder drops below its original set pressure, such a maintaining valve may feed brake pipe (BP) pressure through a choke to replenish and maintain brake cylinder (BC) pressure up to a certain point. If the leak is too great (i.e., to the extent it exceeds the capacity of the choke), the brake cylinder will not be maintained. Such a maintaining valve may be either integrated into the control valve, or it may be mounted remotely to the brake system. If mounted remotely, it may be connected by multiple ways, including through a conventional 4-port access plate.

Abstract: A brake cylinder maintaining may include spool valves or poppet valves. When the pressure in the brake cylinder drops below its original set pressure, such a maintaining valve may feed brake pipe (BP) pressure through a choke to replenish and maintain brake cylinder (BC) pressure up to a certain point. If the leak is too great (i.e., to the extent it exceeds the capacity of the choke), the brake cylinder will not be maintained. Such a maintaining valve may be either integrated into the control valve, or it may be mounted remotely to the brake system. If mounted remotely, it may be connected by multiple ways, including through a conventional 4-port access plate.