Abstract: A pressure reducer assembly (100) includes a pressure reducer body (110) defining at least one pressure reducer chamber (120) along a central axis (X-X?). The pressure reducer chamber (120) includes an inlet section (122) and an outlet section (124) fluidly coupled with the inlet section (122). The pressure reducer assembly (100) further includes a spring-operated hollow piston rod (121) having a center (X) along the central axis (X-X?), a cylindrical inner peripheral surface comprising an inner diameter (A), and a cylindrical outer peripheral surface comprising an outer diameter (B). A diaphragm (128) made of elastic material is adapted to be operatively coupled with the piston rod (121). The diaphragm (128) includes a central hole (150) having a center (Y) along a central axis (W-W?) and a diameter (C).

Abstract: A valve subassembly includes a body plug, a poppet, and a seat carrier. The body plug includes a tubular side wall defining a central cavity and one or more lateral flow apertures in the side wall. The poppet includes axially extending upper and lower stem portions and a radially extending poppet sealing portion between the upper and lower stem portions, with the lower stem portion and the poppet sealing portion being received in the central cavity of the body plug. The seat carrier is assembled with the body plug and includes a central bore receiving the upper stem portion of the poppet therethrough, the seat carrier retaining a seat seal in radial alignment with the poppet sealing portion.

Abstract: A regulator valve has an anti-seize feature when in the hard stop position. The valve is providing with a biasing force away from the hard stop position when in the hard stop position sufficient to prevent seizure of the drive screw in the hard stop position. This biasing force may be provided by a resilient member and/or a plastic, instead of a metal, adjusting screw which may provide sufficient resiliency to prevent seizing in the hard stop position. A resilient member could be a washer such as a spring washer, a wave washer, or even a compressible flat.

Abstract: An actuator for a separator for separating contaminants from a fluid stream which includes entrained contaminants. The actuator is arranged to move along an actuator axis to adjust an open cross-sectional area of at least one aperture of the separator, and comprises a flexible diaphragm, and a support assembly for the flexible diaphragm. The support assembly is movable along the actuator axis carrying the flexible diaphragm and has an upper support member mounted on a lower support member. A portion of the flexible diaphragm is located between the upper and lower support members. The lower support member comprises an axially extending support portion coupled to a radially extending support portion. The upper support member comprises a diaphragm anti-inversion feature coupled to a radially extending support portion. The diaphragm anti-inversion feature extends such that it axially overlaps at least part of the axially extending support portion of the lower support member.

Abstract: A method for aquaculture including a fastener that allows for a float to be easily detached from and securely reattached to an aquaculture cage. The method provides multiple toolless approaches to submerse an aquaculture cage that is buoyant in water when attached with a fastener to a hollow float defining a volume filled with air. The method includes in a first approach, detaching the hollow float from the aquaculture cage by releasing the fastener without using a tool to allow the cage to sink in the water and in a second approach, with the hollow float attached to the aquaculture cage, at least partially filling the float with fluid to fully submerse both the cage and the hollow float beneath a surface of the water.

Abstract: A pressure relief valve for a gas pressure regulator includes: a deformable and gas-tight, laminar element; an outflow channel that allows the passage of the gas between one side and the other of the laminar element including a precisely-sized hole; a shutter removably associated with the laminar element through a coupler that defines, for the shutter, a closed position of the outflow channel and an open position of the outflow channel; an elastic element interposed between the shutter and the laminar element in order to push the shutter towards the closed position. The couple includes a through hole belonging to the laminar element and a shaft slidingly inserted in the through hole, and the shutter is operatively connected to the shaft. The outflow channel is distinct from the through hole, as sealing is provided to prevent the passage of the gas between the through hole and the shaft.

Abstract: A pressure regulator includes a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and a regulated fluid volume outlet passage, a regulated fluid pressure piston having a first surface side exposed to the regulated fluid volume, and a second surface side exposed outwardly of the body, an external biasing member contactable with the piston and providing a force on the piston inwardly of the body, a gate connected to the piston, a dampening piston disposed in the dampening piston bore, the dampening piston disposed between a dampening and regulated fluid volumes and including a recess including a band therein having at least one gap therethrough, the gap in the band forming a passage between the dampening piston and the piston bore communicable with a volume exterior to the region between the dampening piston and the piston bore.

Abstract: A pressure-regulating valve has a valve piston (10) subjected to the action of an energy store and guided longitudinally in a valve housing (12). The valve housing has a supply port (14), a utility port (16) and a tank port (18) actuated by a control part (20) closing with a sealing action. In connecting from the supply port to the utility port, a pressure reduction function is realized. In a fluidic connection from the utility port to the tank port, a pressure-limiting function is realized. The control part (20) has a control rod (22) with two control bodies (24, 26) spaced apart from one another. One control body (24) controls the connection between supply port (14) and utility port (16). The other control body (26) controls the connection between utility port (16) and tank port (18).

Abstract: An aerosol dispenser having a valve cup. The valve cup has an internal interlock, for attachment of a valve assembly thereto. A seal is disposed below the interlock. This arrangement provides the benefit that components of the dispenser may be inserted past the interlock, and still seal product therein under pressure. The interlock may comprise threads or a bayonet fitting. The valve cup may be injection molded as a preform.

Abstract: A pressure retaining valve (1) has a main control piston (39) guided longitudinally displaceably in a single-piece or multiple-piece valve housing (29) and a non-return piston (43). In a pressure retaining position, a fluid-conducting connection between connection points (37a, 37b, 21) is shut off by the two pistons (39, 43). Connection point (37a) serves to feed media. Connection point (37b) discharges media. Connection point (21) leads to a hydraulic consumer. In a load-raising position, the two pistons (43) move relative to one another into a release position, in which the connection between the medium feed (37a) and the consumer is established. In a load-reducing position, the two pistons (39, 43) assume a spacing from one another such that the connection between the medium discharge (37b) and the consumer is established. A monitoring device (75) determines the individual switching positions of the pistons (39, 43) to ensure reliable functioning of the pressure retaining valve (1).

Abstract: An air pressure control device includes first and second housings, a diaphragm partitioning an inner space of the housings into a first air chamber (one air chamber) and a second air chamber (the other air chamber), a valve seat supported by the diaphragm, a valve member arranged in the first air chamber and closing or opening a through-hole in the valve seat, a pressure adjusting mechanism (including a pressure adjusting bolt and an upper seat) that adjusts a force applied to the diaphragm from a side including the second air chamber, and a main spring (compression coil spring) disposed in the second air chamber and applying a spring force to a lower seat (spring receiving member) disposed on the valve seat. A bearing is interposed between the valve seat and the lower seat.

Abstract: An electropneumatic switch valve includes a pneumatic circuit to a pressurized fluid source, an electromagnetic circuit coupled to the pneumatic circuit, and a control module connected to the electromagnetic circuit. The control module provides a first control signal inducing a first state of the pneumatic circuit, a second control signal inducing a second state of the pneumatic circuit, a third control signal inducing a third state of the pneumatic circuit, and a fourth control signal inducing a fourth state of the pneumatic circuit.

Abstract: An actuator of a regulator is connected to one end of a valve rod. The actuator includes a shell, a limiting component, a diaphragm assembly, and an elastic element. The diaphragm assembly is movably sleeved on the valve rod. Further, the elastic element is coupled to the diaphragm assembly and is movably sleeved between the diaphragm assembly and a tip of one end of the valve rod, in a compressed state. An inner diameter of a portion of the limiting component is smaller than an outer diameter of an upper portion of the diaphragm assembly. The limiting component is located above the diaphragm assembly.

Abstract: A pressure regulator device, particularly a dome-loaded pressure regulator, regulating a blowing pressure in a blowmolding machine, including a regulator chamber. The regulator chamber includes a primary pressure port for introduction of primary medium into the regulator chamber with primary pressure, and a secondary pressure port for discharging primary medium from the regulator chamber with secondary pressure. A regulator piston is mounted displaceably inside the regulator chamber, movable into an open and a closed position by a switch position of a valve control device for controlling and/or setting the primary and/or secondary pressure. The valve control device includes a control chamber, and a sealing device arranged at a lower movement stop inside the control chamber between the secondary pressure port and the control means, such that contact of the primary medium with the control means is prevented at least partly, preferably completely, independently of the control pressure and/or primary pressure.

Abstract: An exhaust gas pressure regulator for a combustion engine includes a regulator housing and an inner diffuser assembly arranged inside the regulator housing so that an exhaust gas flow duct is formed between an inner surface of the regulator housing and an outer surface of the inner diffuser assembly. The inner diffuser assembly includes a front portion and a regulating piston that is moveable relative to the front portion and the regulator housing between an idle position in which the exhaust gas flow duct is open, and a pressurized position in which the regulating piston at least partly closes the exhaust gas flow duct. The inner diffuser assembly includes at least one throttled flow passage between the gas flow duct and an exhaust gas pressure chamber defined by the regulating piston and an interior surface of the front portion.

Abstract: A pressure independent control valve (10) for controlling the flow of a liquid medium includes a valve body having a side wall defining a conduit that extends from an inlet to an outlet. The side wall of the valve body include a first side opening (23) and a second side opening (24) extending into the conduit. A first insert element (21) is placed into the first side opening (23) and a second insert element (22) is placed into the second side opening (24). At least part of a pressure control device (18) is accommodated by said first insert element (21), and at least part of a flow rate adjustment device (19) is accommodated by said second insert element (22).

Abstract: Systems, methods, and apparatuses for a regulator are provided. The regulator includes a reducing valve, an accumulator, an accumulator line, and a regulated line. The reducing valve is operable between a closed position and an open position. The reducing valve includes a first opening inlet configured to receive fluid to bias the reducing valve towards the open position, a first closing inlet configured to receive fluid to bias the reducing valve towards the closed position, and a first spring configured to transmit a first spring force to the reducing valve to bias the reducing valve towards the closed position. The accumulator is configured to store fluid at a first pressure. The accumulator line is configured to receive fluid from the accumulator and to provide the fluid to the first opening inlet at the first pressure. The regulated line is connected to the first closing inlet at a second pressure.

Abstract: An improved structure of an energy-saving precision pressure adjusting valve includes a main body in an interior of which a main membrane and a balance membrane are arranged. The main membrane is operable by an overflow tube and the balance membrane is operable by a pressure-adjusting stein, so that when pneumatic fluid enters the main body, through a channel, a feedback channel and a pressure regulation channel that communicate with each other, together with a feedback channel flow regulation hole and a steel ball arranged in the feedback channel, the pneumatic fluid is allowed to flow in one direction, in combination with stein covering rubber provided on the pressure-adjusting stein and membrane covering rubber provided on the main membrane, the flowing of the pneumatic fluid is made faster and the purpose of fast increase and decrease of pressure and high precision pressure output can be achieved.

Abstract: A liquid flow device includes a container and a lid. When the lid is mounted on the container, the container supports a gas supply passage, a pressurization passage, an evacuation passage, and a liquid passage. A control valve is located between the gas supply passage and both the pressurization passage and the evacuation passage. In one configuration, the control valve provides communication between the gas supply passage and pressurization passage to pressurize the container and dispense liquid from the container through the liquid passage. In another configuration, the control valve provides communication between the gas supply passage and evacuation passage to create a vacuum pressure inside the container for evacuating liquid into the container through the liquid passage.

Abstract: A pneumatic liquid dispenser includes a container and a lid. When the lid is mounted on the container, the container supports passaging defining a gas supply inlet for receiving pressurized gas, a gas outlet for delivering pressurized gas to the container, and a gas flow path between the inlet and the outlet. A pressure valve is located between the gas supply inlet and the gas outlet. The pressure valve is configured to automatically permit gas flow along the gas flow path when pressure in the interior of the container is less than a threshold pressure and to automatically block gas flow along the gas flow path when pressure in the interior of the container is greater than the threshold pressure. When gas flows freely through the gas flow path, the gas pressurizes the container to dispense liquid in the container through a liquid passage.

Abstract: A piston regulator of a type that seals on the low-pressure side of a valve seat (10) includes a mechanism by which the valve can be shut off, for example for transport or storage, without risk of overloading the seat (10). Two exemplary mechanisms are disclosed. The first involves applying a closing load to a regulating piston (6) via a closing piston (17) with a surface that is acted on by secondary pressure to press it away from the regulating piston (6). The second arrangement is based on a nested regulating element: an inner sealing element (901) and outer slidable casing (900) are separable when a closing force is applied. This allows the casing (900) to transfer forces arising from secondary pressure and excessive closing force; the sealing element (901) is pressed onto the seat through a load supplied by a closing spring (903). In both cases, the load on the seat is limited.

Abstract: Gas regulating means (22), to regulate the flow of gas so as to achieve a desired pressure set by a user, is provided. The gas regulating means (22) is located within a gas flow path between a gas inlet and a gas outlet, characterised in that the gas regulating means (22) comprises an encapsulated valve (24; 410) with a lever (26; 426) that can be actuated by a proximate movable piston arrangement (20). In an embodiment, the encapsulated valve (24, 410) of the gas regulating means (22) comprises a valve body (50; 412) having an inlet side (52; 416) and an outlet side (54; 420), the lever (26; 426) being pivotally fitted at the outlet side (54; 420) with a pivot pin (56; 430), the lever (26; 426) having an actuating cam (66; 432), proximate the pivot pin (56; 430). The encapsulated valve (24, 410) of the gas regulating means (22) comprises a capsule valve pin (68; 434) for abutting against the actuating cam (66; 432) of the lever (26; 426).

Abstract: A valve has a housing with inlet and outlet ports for a liquid, a connector fitting between the ports, a controller in the connector fitting, and first and second flow regulators in the connector fitting. Connection formations on the connector are engaged by an adjuster acting on the first flow regulator while an actuator acts on the manually operable second flow regulator. The controller maintains a differential pressure constant via the first and second flow regulators. The first flow regulator is downstream of the inlet port in a flow direction, followed by the second flow regulator, the controller, and the outlet port. A spindle axially displaceable in the connector fitting has an actuating part that projects out of the connector fitting and a choke element fastened to the spindle and forming part of the first flow regulator. This spindle extends axially through the controller and the second flow regulator.

Abstract: A regulator assembly having a main body is provided. The main body includes a first passage extending from a first end and a second passage extending from the first passage towards a second end. The main body also includes a seat defined between the first passage and the second passage. The regulator assembly also includes a valve element. The valve element includes a head portion having a projection. The projection includes a plurality of apertures provided therethrough. The valve element further includes an internal channel. The regulator assembly further includes a spring element. Direct fluid communication between the plurality of apertures of the valve element and the first passage of the main body is discontinued when the head portion is in contact with the seat; and is in direct fluid communication with the first passage of the main body when the valve element is not in contact with the seat.

Abstract: An air pressure controller having an inlet and an outlet, the controller may be configured to reduce air pressure between the inlet and the outlet and includes an exhaust port configured to exhaust air if a pressure at the outlet rises above a predetermined level.

Abstract: A pressure reducer, comprising an outer cylinder with a first air supply connector on a first end side of the outer cylinder and a second air supply connector on a second end side of the outer cylinder is provided. A piston can be guided movably in the outer cylinder. A first air chamber is arranged between the first air supply connector of the outer cylinder and the first front surface of the piston, and a second air chamber is arranged between the second air supply connector of the outer cylinder and a second front surface of the piston. The surface areas of the two front surfaces of the piston are of different size. The pressure reducer is suitable for reducing a second air pressure which prevails in the second air chamber in a pulsed manner proportionally to a first air pressure which prevails in the first air chamber, by a first air connection.

Abstract: A liquid supply mechanism includes a lower cover, an upper cover, a plunger, at least one resilient member and at least one damping member. The lower cover has a liquid outlet and the upper cover is connected to the lower cover. A chamber is formed between the lower cover and the upper cover. The chamber communicates with the liquid outlet and contains a cooling liquid. The upper cover has an axial hole. The plunger is movably disposed in the chamber. The plunger has an axial rod and the axial rod is inserted into the axial hole. The resilient member is disposed in the chamber. Opposite ends of the resilient member abut against the upper cover and the plunger. The damping member is disposed on the axial rod and abuts against an inner wall of the axial hole.

Abstract: A pressure relief device comprising a valve configured to resiliently deform in response to a predetermined pressure; and a sound dampener configured to dampen a sound generated by the valve when the valve resiliently deforms in response to the predetermined pressure.

Abstract: A gas pressure regulator (10) is disclosed, comprising a body (12) fitted with a gas inlet stem (14), at a first end of the body (10), for receiving gas from a gas source at a first pressure, and a gas outlet stem or adaptor (16) at a second end of the body (10), for supplying gas at a desired pressure at the gas outlet stem (16). A pressure adjusting mechanism (18) is provided to enable a user to adjust and set the desired pressure, the pressure adjusting mechanism (18) comprising a movable piston arrangement (20). The gas pressure regulator (10) further comprises gas regulating means (22), to regulate gas flowing out of the gas outlet stem (16) to achieve the desired pressure set by the user.

Abstract: A filter regulator improved in efficiency of assembling and detaching a filter element and a valve spring at the time of maintenance is disclosed herein. A valve is disposed so as to face a valve seat provided to an opening end of a communication hole through which a primary port and a secondary port communicate with each other, and a valve spring applies a spring force to the valve in a direction of closing the communication hole. A plurality of retaining bars are provided to a port block, elastically-deformable front ends thereof are radially displaced between a closed steady state and an opened state, and with the valve spring disposed, engaging claws are provided to the front ends of the retaining bars, and engage with the other end of the valve spring disposed. A filter element is attached to the outside of the retaining bars.

Abstract: A device for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, having a control module that includes a valve body having a stepped through-opening, and a control piston guided axially in the through-opening of the valve body, and a control valve that influences the movement of the control piston, the valve body having at a first end a closable medium inlet opening having a valve chamber. The control valve and the control module are situated in a common housing sleeve, the valve body of the control module being pressed into a first end of the housing sleeve until it comes to a stop on a housing shoulder, and the control valve being introduced into and fixed in a second end of the housing sleeve.

Abstract: A valve assembly includes a sensing device, a main spring, a bonnet located below the sensing device, a piston with a through hole, and a valve stem connected with the sensing device and having a penetrating part through the through hole. The sensing device drives the valve stem to drive the piston. The valve assembly also includes an auxiliary spring arranged between the bonnet and the piston. The penetrating part is longer than the depth of the through hole and the valve stem is slidably coupled in piston. The valve assembly can prevent the valve stem from transferring the force of the main spring to the piston, so as to avoid damaging the valve port, the valve stem, and the piston when the force of the main spring is too large.

Abstract: A separation chamber type anti-surge valve may include a valve body formed with a charge air passage inlet and a charge air passage outlet, and a valve cover coupled to the valve body by a fastening member to define an empty inner space between the valve body and the valve cover, in which the inner space is divided into a diaphragm chamber and a bypass chamber by a valve guide, one side tip of a valve rod being fixed in the diaphragm chamber, a valve disc fixed to another side tip of the valve rod, and the diaphragm chamber is divided into a control pressure chamber and a normal static pressure chamber.

Abstract: A device for providing an output fluid at a regulated output pressure includes a pressure control unit controlled via a pilot control pressure and a pilot control unit that provides the pilot control pressure. The pressure control unit includes an inlet chamber for an input fluid having an input pressure, an outlet chamber for the output fluid having the regulated output pressure and a first valve unit that acts between the inlet chamber and the outlet chamber. A first diaphragm of the pressure control unit is acted upon by the pilot control pressure. A second diaphragm, which is mechanically coupled to the first diaphragm is acted upon by the output fluid having the output pressure acts. At least the second diaphragm mechanically acts on the first valve unit.

Abstract: A piston type hydro pneumatic accumulator with internal leak detection, having a gas chamber and a liquid chamber, the piston type hydro pneumatic accumulator comprising a cylindrical barrel, a floating piston, a gas end cover, a liquid end cover, a leakage detection construction having a first cylindrical channel reducing to a conical channel and further reducing to a second cylindrical channel, a floater device, the gas end cover and the liquid end cover hermetically disposed into the cylindrical barrel, a first pressure meter disposed so as to measure a pressure in the first cylindrical channel and a second pressure meter disposed so as to measure the pressure in the second cylindrical channel, the readings in the two pressure meters used for inferring a gas leakage or a liquid leakage.

Abstract: A braking device for a vehicle comprises a main brake cylinder, which provides, in response to the actuation thereof, an operating brake pressure in at least one operating brake circuit for the actuation of an operating brake. A hydraulic fluid pressure intake is connected to a hydraulic circuit, which contains a hydraulic fluid having a built-up hydraulic circuit pressure. Through the hydraulic fluid pressure intake, the hydraulic fluid is provided at the hydraulic circuit pressure. The braking device further comprises a valve device, which actively controls a main brake cylinder actuation pressure and/or a parking brake release pressure by means of the hydraulic fluid that is provided. The main brake cylinder is actuated by means of the main brake cylinder actuation pressure for an active brake engagement. Alternatively or additionally, a parking brake is hydraulically released by means of the parking brake release pressure.

Abstract: A valve with proof of closure includes a valve body with a first port and a second port separated by a valve member that is biased toward a closed position. A piston is mounted within a pressure chamber with a pressure fluid port for connecting to a source of pressurized fluid. Piston is biased toward a retracted position and is moved to an extended position in response to pressurized fluid entering through pressurized fluid port. A control member is attached to valve member and is engaged by piston as it is moved a first distance from retracted position toward extended position. A valve position indicator with a closed state and as open state is biased toward the closed state and is actuated by piston as piston moves a second distance from retracted position toward extended position to move valve position indicator from closed state toward open state.

Abstract: A pressure regulator assembly comprising a pressure regulator arranged to regulate the flow rate of a gas source from a gas cylinder. The pressure regulator comprises a restriction device located in the pressure regulator, positionable to restrict the flow of gas therethrough, a biasing arrangement to apply a predetermined bias to the restriction device, a selection device operable to select a configuration of the biasing arrangement and restriction device to provide a selected gas pressure at said outlet, and a rotatable handle rotatable about an axis of rotation. A rotary control member and said rotatable handle are operable to move a control device between maximum and minimum linear positions in a direction substantially parallel to the axis of rotation. The bias from said biasing arrangement is dependent upon the linear position of the control device.

Abstract: A fuel system 10 includes a fuel tank 11, a demand valve 12, a primer pump 13, and an internal combustion engine 14. The demand valve 12 closes and prevents fuel flow to the engine and potential fuel spillage when the engine is not running, even if a positive pressure condition exists in the fuel tank 11. The demand valve 12 is opened to allow fuel flow to the engine 14 only when the engine is to be started or is running. This opening of the demand valve is caused by a vacuum in a central cavity 31 of the demand valve 12. The vacuum causes a diaphragm 43 to move laterally and act through a connector 44 against a pin 39 connected to a valve member 37, to tilt or rotate the valve member 37 relative to a valve seat 34.

Abstract: A valve includes: a first chamber; a second chamber adjacent to the first chamber, and having a fuel discharge opening from which the fuel is discharged; an opening/closing hole configured to communicate the first chamber with the second chamber; an opening/closing member configured to open and close the opening/closing hole; a first contact spring having one end contacting an end of the opening/closing member at a side of the first chamber; a first control knob mounted to another end of the first contact spring; a diaphragm mounted to an end of the opening/closing member at a side of the second chamber; a second contact spring having one end connected to the diaphragm; and a second control knob coupled to another end of the second contact spring.

Abstract: A pre-charged pneumatic air rifle air tank adapter lowers an air tank relative to the pre-charged pneumatic air rifle. The lowered air tank facilitates aiming. The adapter also provides a substrate for mounting accessories including a quick disconnect refill plug and a pressure gauge. The adapter includes a female rifle fitting with a threaded central conduit, a male air tank fitting with a central conduit and external threads parallel to, coplanar with and about 0.75 to 1.5 inches apart in elevation from the central conduit of the female rifle fitting, measured vertically from centerline to centerline. A body of the adapter has an internal conduit extending from the female rifle fitting to the male air tank fitting.

Abstract: Certain types of riser tensioner arrangements include a high-pressure accumulator; a pusher-type hydraulic cylinder; a first flow path coupling the high-pressure accumulator with a first volume of the cylinder to enable a first high-pressure fluid to flow therebetween; and a second flow path coupling the high-pressure accumulator with a second volume of the cylinder to enable a second high-pressure fluid to flow therebetween. The piston includes a seat and a hollow extension that defines part of the second volume of the cylinder.

Abstract: A valve for regulating the pressure of a gas flow in a duct according to two pressure levels includes a gate whose position is controlled by an actuator with two chambers and a first control means with a first set point pressure P1 making it possible to position the gate in a first regulated position by comparing a pressure Pav downstream of the gate and the first set point pressure P1. The valve further includes a second control means with a second set point pressure P2 making it possible to position the gate in a second regulated position by comparing the pressure Pav downstream of the gate and the second set point pressure P2 and permutation means for making the first control means or the second control means communicate alternately with one of the chambers of the actuator.

Abstract: A multi-stage fluid pressure regulator, including a first stage valve arranged to open and close a fluid flow path to control flow of fluid through the valve, a first stage piston arranged for movement to open and close the first stage valve, the piston having an inner side and an outer side, a gas delivery conduit having a proximal end attached to the first stage piston and a distal end extending away from the first stage piston, the gas delivery conduit having a passage in fluid communication with the inner side of the first stage piston, and a second stage valve in fluid communication with the gas delivery conduit, the second stage valve including a second valve chamber into which the distal end of the gas delivery conduit is positioned.

Abstract: A tool for resetting a gas regulator valve after an over-pressure event.

Abstract: A valve assembly comprises a closure element disposed in a flow control duct, a fluid-driven actuator assembly, a shaft operable to translate linear movement of the actuator assembly into rotation of the closure element, and an integral filter and pressure regulator unit disposed in line with an actuator fluid supply passage. The actuator fluid supply passage extends between the flow control duct and the actuator assembly. The integral filter and pressure regulator unit includes a regulator housing having at least one cylindrical wall surrounding a vent cavity and a regulator cavity. Filter media is secured to the regulator housing and is disposed across a regulator orifice in communication with the regulator cavity.

Abstract: A balanced port control assembly includes a control element with a valve plug coupled to a valve stem and a pressure sensing labyrinth defined at least partly by the valve plug. The pressure sensing labyrinth provides for fluid communication between a sealing surface of the valve plug and a balancing diaphragm carried internally of the control element. The pressure sensing labyrinth includes at least one pressure sensing passage extending from the sealing surface and into the valve plug along a central longitudinal axis of the control element. So configured, fluid pressure resident on the sealing surface of the valve plug is also resident on the balancing diaphragm such that equal and opposite forces are applied to the control element.

Abstract: A pressure relief assembly may include an actuator stem having a plurality of retaining grooves. A relief plate may be operatively connected to the actuator stem and a diaphragm plate may be operatively connected to the actuator stem. A diaphragm may be least partially disposed between the relief plate and the diaphragm plate. A relief spring seat may be releasably attached to the actuator stem at one of the plurality of retaining grooves. The relief spring may be adjusted by moving the attachment point from one retaining groove to another retaining groove.

Abstract: The present invention relates to a throttling structure for use in a fluid pressure device. A nozzle passage is formed between a primary side port and a nozzle back pressure chamber. A throttling mechanism made up from a plurality of orifice plates is disposed in the nozzle passage. Small diameter opening holes, which are smaller in diameter than the nozzle passage, are provided in the orifice plates. Outer edge portions of the orifice plates are retained in a second body part via seal members. Further, the orifice plates are separated mutually from each other by a predetermined distance along the direction of extension of the nozzle passage.

Abstract: Systems and methods for venting gas from a gas regulator in the event of overpressurization of the gas regulator are provided. A bonnet for a gas regulator that includes one or more apertures through which gas may vent. The bonnet may be made of a moldable synthetic plastic material, such as glass filled nylon.