Abstract: An ingress-barrier assembly for use with pressure-operated downhole equipment can be used to limit hydraulic fluid flow in a wellbore environment for completions and operations through the life of a well. An assembly can comprise a first port to communicate hydraulic fluid with a first fluid conveyance line. The assembly can include a second port to communicate hydraulic fluid with a second fluid conveyance line. The assembly can further include a first-end stop, a second-end stop, and a moveable seal. The moveable seal can move within a bore of the assembly between the first-end stop and the second-end stop to communicate pressure between the first port and the second port.

Abstract: A gyroscopic stabiliser for stabilising motion of an object includes a support for attaching to the object, a gimbal rotatably supported by the support to be rotatable around a first axis, a flywheel rotatably supported by the gimbal to be rotatable around a second axis relative to the gimbal, orthogonal to the first axis, and a rotary damper. The rotary damper has a chamber containing a damping fluid a vane that is rotatable within the chamber and that is coupled to the gimbal and a flow passage allowing flow of the damping fluid from the chamber on one side of the vane to the chamber on the other side of the vane when the vane is rotated.

Abstract: Apparatus and methods pertaining to an adapter mechanically connecting a wireless actuator to an SCSSV subassembly that includes an SCSSV. The adapter mechanically connects to the SCSSV subassembly so that the adapter is situated uphole of the SCSSV subassembly when set in a tubular of a wellbore. An actuating piston is carried by the adapter. The actuating piston transfers an opening force to the SCSSV in response to receipt by the adapter of pressurized fluid from the wireless actuator, thereby opening a flapper of the SCSSV.

Abstract: A check valve may be used to enable desired flow rates of fluid in a particular direction. In some examples, the check valve may have a hollow cylindrical body and a threaded portion on an exterior wall of the hollow cylindrical body such that the check valve may be coupled with an assembly, such as an adapter for a vehicle engine. The check valve may include a plunger having a dome shaped portion (e.g., cone shaped, semi-hemispherical shaped, rounded cone shaped, etc.) that extends out of the hollow cylindrical body into free space when the check valve is in an open position and forms a seal with the hollow cylindrical body when the check valve is in a closed position.

Abstract: A vent valve flow fuse includes a valve cap with a valve cap cavity defined by one or more valve cap interior surfaces. The vent valve flow fuse includes a valve body with a valve body cavity defined by one or more valve body interior surfaces. The vent valve flow fuse includes a poppet configured to at least partially fit within the valve cap cavity and the valve body cavity. The vent valve flow fuse includes a spring configured to fit within the valve body cavity and to generate a resistive force against the poppet. The poppet is in a first position when fluid having a first amount of fluid pressure enters the valve cap cavity from a vent valve and engages the poppet. The poppet is in a second position when fluid having a second amount of fluid pressure enters the valve cap cavity and engages the poppet.

Abstract: A method and apparatus for use in controlling a dispensing rate of medication or other substance via a syringe, including, without limitation, into a patient, intravenous line port or heparin lock. A fluid flow rate control apparatus has a housing defining an inner chamber with an inlet port and an outlet port. Sealing seats are formed at or near both the inlet and outlet ports, and a moveable sealing element, such as a ball, can move within the inner chamber between the sealing seats. A spring biases the ball toward the inlet port sealing seat.

Abstract: A new type of pressure relief valve is described herein which has advantages over standard valves in that it may comprise a longer plunger than normal, and two guiding points located far away from each other for guiding the plunger within the housing. The valve may also comprise improved exhaust ports and an anti-rotation washer.

Abstract: A pressure regulator is configured to manage a pressure downstream of a pump discharge during operation. A hydraulic piston is exposed to pressure upstream of the pressure regulator during operation. The hydraulic piston extends into a first fluid reservoir. The first fluid reservoir is defined by an inner surface of an outer housing of a subsurface safety valve. A subsurface safety valve is fluidically couple to the hydraulic piston.

Abstract: A pressure regulator valve includes: a housing including a base, a cover, and a body; a valve element configured to open and close a valve passage by moving between a closed position and an open position, the valve element being further configured to reduce a primary pressure to a secondary pressure and receive the secondary pressure by which the valve element moves toward the closed position; a biasing unit accommodated in an accommodating space formed between the body and the cover, the biasing unit being configured to bias the valve element such that the valve element moves toward the open position; a first sealing member provided at a gap between the base and the body; and a second sealing member provided a gap between the base and the cover and made of synthetic rubber. The second sealing member is arranged away from the body.

Abstract: An improved downhole tool for use in wellbores. In some embodiments, the tool has a first position wherein fluids entering the tool can exit via two or more flow passages, and a second position wherein some of the two or more flow passages are blocked such that fluids in the tool exit via the remaining unblocked flow passages. In other embodiments, the tool has a first position wherein fluids entering the tool are directed to some of the two or more flow passages, and a second position wherein fluids entering the tool are directed to the remaining flow passages. The tool is transitionable between the first and second positions by alternately ceasing or decreasing fluid flow to the tool and introducing or increasing fluid flow to the tool.

Abstract: A supercharging device (20), having: a housing (21) which has a longitudinal axis (L); at least one housing inlet (1) which leads into the housing (21); at least one housing outlet (2) which leads out of the housing (21); at least one compressor wheel (5) which is arranged in a compressor chamber (15) and which is driven by a motor shaft (16) and which is arranged between the housing inlet (1) and the housing outlet (2) of the housing (21) as viewed in the flow direction, and at least one bypass duct (17) which is integrated in the housing (21) and which connects the housing inlet (1) to the housing outlet (2) so as to bypass the compressor chamber (15). The bypass duct (17) has a self-adjusting valve (22). The housing inlet (1) and the housing outlet (2) are formed as an axial inlet and an axial outlet respectively.

Abstract: The top drive guide assists with insertion of the drill string through the inner barrel and a rubber found in the RCD. The top drive guide aligns the drill string with the inner barrel and rubber for insertion through the inner barrel and the rubber. The top drive guide positions the drill string within the rubber for rotation of the inner barrel with the drill string. The contact of the drill string with the rubber caused by the top drive guide rotates the inner barrel with the drill string. The top drive guide may be used either in a low pressure head or a high pressure head. The sealed grease head provides a grease compartment with no oiler or oil lines. The grease compartment is sealed by a top seal and a bottom seal that seals between the inner barrel and the outer barrel.

Abstract: Embodiments of a flow limiting duct vent valve (DVV) are provided, as are embodiments of a bleed air system including a flow limiting DVV. In one embodiment, the bleed air system a flow limiting DVV and a first valved device, such as a high pressure regulator. The DVV includes, in turn, a housing assembly having an inlet and an outlet. The inlet is fluidly coupled to the valved device when the bleed air system is installed on a gas turbine engine. A valve element is mounted in the housing assembly and, during operation of the DVV, moves from: (i) the closed position to an open vent position when the pressure differential across the valve element exceeds a first threshold, and (ii) from the open vent position to an overpressure shutoff position when the pressure differential across the valve element exceeds a second threshold greater than the first threshold.

Abstract: This disclosure is directed to couplers which significantly reduce the production of noise when disconnected from a mating coupler, thus addressing a significant occupational safety problem in the field of compressed air couplings. Accordingly, one aspect of the disclosure provides a coupler which may be used to connect/disconnect an air hose subjected to high air pressure while suppressing or dampening the noise typically produced upon disconnecting the coupler. In some examples, a coupler is provided with a valve having axial passageways that facilitate the relatively free flow of air during normal operation that become partially occluded upon an action disconnecting the coupler to significantly reduce sound levels.

Abstract: Method and apparatus for air flow regulation comprise a vertically oriented tube, a sail assembly positioned in the tube and moveable therewithin responsively to air flow through the tube to regulate rate of air flow through the tube and to stop air flow through the tube upon air flow rate through the tube exceeding a preselected value with a detector for sensing when the sail assembly has stopped air flow thought the tube as a result of air flow rate exceeding said pre-selected value.

Abstract: An oil return mechanism includes a base, a control switch, a first blocking ball mounted in the base, an elastic member mounted between the first blocking ball and the base. The base has a liquid storing cavity, a liquid returning cavity, a communicating cavity, a first communicating opening communicating between the liquid returning cavity and the communicating cavity, and a second communicating opening communicating between the communicating cavity and the liquid storing cavity. The present invention can regulate a speed of a fluid flowing from the liquid returning cavity to the communicating cavity, and has the advantages of simple structure and great reduction of cost.

Abstract: Embodiments of the invention generally relate to a failsafe subsurface controlled safety valve. In one embodiment, a failsafe subsurface controlled safety valve assembly includes: a tubular housing; a closure member disposed in the tubular housing, wherein the closure member is movable between a closed position and an open position; an operating piston operable to move the closure member between the closed position and the open position; and a trigger piston operable to move the closure member from the open position to the closed position.

Abstract: A wireline retrievable injection valve for an oil or gas well has an internal valve that is initially moved to open a flapper safety valve and also opens to allow fluid flow through the valve. The internal valve includes a sleeve that opens the flapper safety valve and shields the flapper safety valve from fluid. In this manner the flapper valve is protected from being caused to “flutter” or “chatter” due to pressure variations in the fluid flow, thereby damaging the seat.

Abstract: The casing stripper device provides a housing for a stripper rubber that includes a top retainer, a base plate, and at least one rubber disc. A base place is secured within a drilling nipple. At least one disc is secured above the base plate. The number of rubber discs secured between the retainer and base plate will depend on the operation and pressure of the drilling operation. The top retainer is secured to the base plate with at least one rubber disc secured between the top retainer and the base plate.

Abstract: A shut-off valve to fill a tank with a gaseous medium. The shut-off valve includes a valve housing, a piston arranged in the valve housing for displacement in an axial direction and having an axially continuous bore, a first end piece having an outlet opening which is fluidically-connected to the axially continuous bore of the piston; and a second end piece having an inlet opening which is fluidically-connected to the axially continuous bore of the piston. A first end side of the piston and a first end side of the second end piece of the valve housing form a sealing seat upon contact therebetween.

Abstract: A tank system may include a tank having a tank volume and mounted in a vehicle having a system CG and a system CG offset limit. The tank system may further include at least one outer baffle having an outer baffle port and dividing the tank volume into an inner compartment and at least one outer compartment. The outer baffle may be positioned such that when the outer baffle port is open and the combined volume of liquid in the inner and outer compartment is less than a total inner compartment volume, the system CG may exceed the system CG offset limit during a shift of a liquid CG, and when the outer baffle port is closed and the outer compartment is substantially empty of liquid, the system CG remains within the system CG offset limit during a shift of the liquid CG for at least one fill level of the inner compartment.

Abstract: A pipe break valve device includes a housing that has a recess continuous in a flow direction, a valve slide that is arranged displaceably in the flow direction in the recess, and a spatial volume of a throttle device that is arranged at least in regions between the outer wall of the valve slide and the inner wall of the housing. Throttle ducts that are present on the inlet side and on the outlet side are formed by a first gap and a second gap which are present in each case between the outer wall of the valve slide and the inner wall of the housing, and no sealing means are present between the inner wall of the housing and the outer wall of the valve slide.

Abstract: An apparatus for containing and controlling the flow of hydrocarbons from a bore well or other earth formation includes a housing enclosing a receiving and distribution chamber, receiving and distribution chamber is in fluid communication with and sealably connected to a top vertical tubular member and a bottom vertical tubular member, wherein the top and bottom tubular members extend from the receiving and distribution chamber to the exterior of said housing. The apparatus further includes a cone aperture adapted to prevent or allow the flow of liquid into the top tubular member, at least one outlet passage between the receiving and distribution chamber and the exterior of the housing, valve means adapted to permit or prevent the flow of liquid through at least one of said outlet passages, and pump devices adapted to facilitate the flow of hydrocarbons through at least one of said outlet passages.

Abstract: An automatic water shut-off valve for low pressure includes: a body having a nipple formed at a lower portion thereof; a rubber diaphragm inserted into a protruding threaded pipe formed at an outside portion of the body; and a pressure supporter pressurizing the rubber diaphragm, wherein the pressure supporter has a drain hole and the fixing cap has a cap drain hole, so that the fluid is drained through a fluid flow hole of the rubber diaphragm in the case of compressible air fluid or at pressure lower than set pressure and is stopped when the fluid switching face of the rubber diaphragm is grounded to a fluid stop protrusion of the pressure supporter in the case of incompressible fluid or at pressure higher than set pressure.

Abstract: Excess flow shutoff valve comprising a valve body, a valve plug, a partition, and an activation component where the valve plug, the partition, and activation component are disposed within the valve body. A suitable flow restriction is provided to create a pressure difference between the upstream end of the valve plug and the downstream end of the valve plug when fluid flows through the valve body. The pressure difference exceeds a target pressure difference needed to activate the activation component when fluid flow through the valve body is higher than a desired rate, and thereby closes the valve.

Abstract: An exhaust-gas turbocharger is embodied with a bypass valve which is disposed in a bypass duct of a turbine between an exhaust-gas pressure line and an outlet cross section of the turbine of the exhaust-gas turbocharger and which is connected to an actuating device for controlling the throughput of exhaust-gas through the bypass duct. Through the bypass valve, a partial flow of the exhaust-gas can be guided past the turbine on demand. The bypass valve has a valve head and a valve stem. The bypass valve is axially movably held with the valve stem. The valve head, in a closed state of the bypass valve, can be placed against a valve seat in order to close the bypass duct in a gas-tight and pressure-tight manner. The side of the valve head that is connected to the valve stem faces the exhaust-gas pressure line.

Abstract: A device for the protection against the rupture of pipes carrying a fluid includes two or more flow channels and a closing element which interrupts the flow of fluid if a predetermined permissible volume flow is exceeded. At least one of the flow channels can be closed by a test closure in order to increase the flow speed in the remaining flow channels and for test purposes to bring about a movement of the closing element into the closing position. In this way, devices for the protection against the rupture of pipes integrated into complex systems carrying a fluid can be tested in situ to verify their proper functioning.

Abstract: A flow valve that may act as either an excess flow valve or a pressure relief valve has a seat and a valve body for sealing against the seat. The valve body has an integral spring arm for biasing the valve body towards or away from the seat to seal or open a flow of fluid, and a magnet cooperating with the spring arm to position the body relative to the seat to maintain the body in a first position during a normal flow condition and maintain the body in a second position in an abnormal flow condition.

Abstract: A check valve includes a valve body having a valve seat, a diffuser, a disc coupled to the diffuser, and a compression spring. The diffuser is positioned inside the valve body and has a forward face. The disc is coupled to and movable relative to the diffuser and has an upstream face and a downstream face. The compression spring biases the disc into a normally open position during forward flow. A check valve apparatus further comprises at least one test bore through the valve member in communication with the disc. A method for testing the operation of a passive check valve is also disclosed.

Abstract: The present invention provides, in part, a valve assembly and method that maintains balance of flow to pressure. In one embodiment, the present invention includes a main body component, a chamber body component, a fluid control plate and seal, and a chamber cap. The chamber body component is adapted to slidingly engage the main body member. A spring assists in biasing the chamber body component in position within the main body component. The chamber cap with a sealing ring assists in preventing backflow of fluid into an outer body or tube member while also providing an opposing force to movement of the chamber body member within the main body member. A sealing ring is also provided around the head portion of the chamber body member. An additional sealing ring can be provided in a cavity on the outside of the main body member.

Abstract: Disclosed is an explosion protection valve comprising a closing member (4) which is movable inside a housing (2), is guided along a guide bar (3), and can be displaced in a moving direction from a predefined open position into a sealing closed position in case of a shock wave or suction wave. The explosion protection valve further comprises a spring arrangement that is effectively connected to the closing member (4) in order to maintain the open position on the guide bar (3). Said spring arrangement is provided with a first spring element (5, 5?) and a second spring element (6, 6?) in relation to the respective moving direction. The spring elements are disposed such that the second spring element (6, 6?) can be impinged upon only following a predetermined spring travel (a) when the closing member (4) is displaced into the closed position.

Abstract: A fluid flow regulator of the present invention comprises in combination a stationary hollow duct housing having a first end and a second end through which fluid flows. The device also incorporates a movable member aligned concentric with the duct having an end essentially similarly shaped and sized to the first end of the housing. The member may be spaced apart from the duct so that fluid can enter the duct housing through an opening defined by the space between the end of the member and the first end of the duct, with the movement of the member serving to change the size of opening. The movement of the member is controlled by the movement of a float located within the duct.

Abstract: A flow control device is comprised of a body/connector, a simplified sliding cord, a sealing device, and a stopper. The body/connector connects an overhead sprinkler to a supply line by means of male threaded ends. The body/connector is comprised of a wrench connector, which is located between the two male threaded ends, a guiding tube that sits on the top side of the body/connector with the assistance of the supporting ribs. The guiding tube guides the sliding cord up and down inside the flow control device and sprinkler. The sliding cord is made from a material that is flexible enough to bend inside the supply line and strong enough to return to its original straight shape. The stopper and the sealing device are connected to each other with the sliding cord. The sealing device sits against the sealing surface of the body/connector if the sprinkler head is missing. The stopper prevents the sealing device from making contact with the body/connector during normal operational conditions.

Abstract: Improvements in an Overflow Shutoff Valve (OSV) that is designed to automatically shutoff water flow when water flows above a rated amount. It is a self-cleaning design with automatic resetting function. The valve consists of an outer body with an inlet and outlet port with an internally installed rubber Venturi tube assembly, fixed flange, moving flange, coil spring and surge flow suppressing orifice. The lower pressure causes the rubber tube to be squeezed by the water pressure, and then automatically shuts off the valve. When the supply water pressure drops below 5 psi the Overflow Shutoff Valve automatically resets and opens to normal position. A flow suppressor orifice prevents any surge flow or start up flow which could cause premature shutoff of the valve. The Overflow shutoff valve can be installed in-line or in a Y body shutoff valve for easy service.

Abstract: A flow-volume regulator has an elastic throttle body which delimits, between itself and a housing wall, a control gap that changes under the pressure of a fluid flow, and at least one associated bypass and/or cleaning channel that has at least one channel inlet arranged upstream of the control gap and at least one channel outlet arranged downstream of the control gap. The bypass and/or cleaning channel contains a valve which can move against a restoring force under the pressure of the oncoming fluid, from an open position into a closed position, and seals the bypass and/or cleaning channel in its closed position. The flow-volume regulator allows an additional volume of the fluid through the bypass channel when the oncoming fluid is at low pressure, so that its flow curve is significantly increased in the low pressure range.

Abstract: Internal valve apparatus are described. An example internal valve includes a body having a valve seat disposed in a fluid flow passageway between an inlet and an outlet. A flow control member is operatively coupled to the body and movable between a first position to engage the valve seat to restrict fluid flow through the valve and a second position to move away from the valve seat to allow fluid flow through the valve. A removable actuator is coupled to the body and operatively coupled to the flow control member to cause the flow control member to move between the first and second positions. A portion of the removable actuator is cantilevered in the fluid flow passageway between the inlet and the outlet when the removable actuator is coupled to the body.

Abstract: A pressure-control valve includes a housing (110) and a valve assembly (115) at least partially disposed within the housing. The housing has a sidewall (112) defining a conduit connecting an inlet opening (116) and an outlet opening (118), wherein the housing has a pressure vent (119) extending through the sidewall. The valve assembly includes: a valve seat (140), a valve support (120), a slidable member (130), and a biasing member (150). The slidable member is reversibly slidable between an open position and a closed position. The closed position interrupts fluid communication through the conduit between the inlet opening and the outlet opening. The slidable member has an upstream effective cross-sectional area greater than its downstream effective cross-sectional area. Sealing members (137,139) forming seals between the slidable member and the sidewall, and a pressure vent is disposed between the seals. A biasing member (150) biases the valve assembly (155) toward the open position.

Abstract: An anti-flooding device (10) including a duct (12) for passage of a flow of liquid, and a limiter (14) inserted along the duct (12) for passage of liquid and defining a section for passage of the liquid that decreases progressively as the flowrate of liquid increases, with closing of the duct (12) once a given threshold flowrate has been reached. The limiter (14) has at least one male element (18) and at least one female element (20), which are mobile with respect to one another so that they slide into one another as the flowrate of liquid increases. Progressive insertion into one another of the male element (18) and the female element (20) defines the section of passage. The male element (18) and female element (20) are shaped with respect to one another so as to reduce the section of passage as the flowrate increases, with closing of the duct (12) for passage of liquid as soon as a given threshold flowrate is reached.

Abstract: The present invention relates to a pressure reducing apparatus. A diaphragm made from an elastic material is provided in the interior of a body. The diaphragm includes a main body portion having a seat member that is capable of being seated on an inner tubular member of the body, a retaining portion disposed on an outer peripheral side of the main body portion and which is slidably displaceable with respect to the inner tubular member, and a skirt that is retained on a flange of the body. Additionally, by flexing of the skirt by means of an elastic force of a spring, the seat member thereof separates away from the inner tubular member.

Abstract: An in-line fluid flow control valve includes a housing defining an inlet chamber and an outlet chamber aligned along a outlet axis. The housing further defines a bore with a flow control device and an adjustment mechanism disposed therein for regulating a fluid flow rate. The flow control device defines a fluid passage interconnecting the inlet chamber and the outlet chamber. The plane and the outlet axis define an acute angle therebetween. The angled position of the bore relative to the outlet axis permits access to and adjustment of the flow control device, as well as replacement of the flow control device, without disconnecting any fittings attached to the inlet and the outlet of the control valve.

Abstract: An apparatus for operating a device such as a self-closing internal valve is disclosed. The apparatus includes a housing assembly having an internal chamber, a fluid inlet in fluid communication with the internal chamber, and an actuator stem extending from the housing assembly. The actuator stem is moveable in response to the addition or removal of a fluid into or out of the internal chamber. To control the flow rate of a fluid into and out of the internal chamber, the apparatus includes a fluid control valve in fluid communication with the fluid inlet of the housing assembly, wherein the fluid control valve is adapted to restrict the rate of fluid flow into the internal chamber of the housing assembly.

Abstract: The disclosure relates to a safety device to be inserted in a pipe through which a fluid flows from an upstream side to a downstream side, this device comprising a tube offering the fluid a central flow path controlled by a central valve which closes in the event of excessive flow of this fluid, an elastically deformable annular shutter mounted on the external periphery of the tube, and retention clamps. According to the disclosure, each of the clamps has a tied end fastened to the periphery of the tube upstream of the annular shutter and can adopt, under the effect of a radial compression, a folded configuration in which its free end is turned towards this annular shutter.

Abstract: An excess flow valve having a housing, a valve seat, a poppet and an adjusting ring. The adjusting ring lies within a bore in the housing and there is an opening through the housing permitting access to the adjustment ring from outside the bore of the housing. Rotation of the adjusting ring controls the maximum travel distance between the poppet and the valve seat. In an embodiment a travelling valve guide is rotatably mounted within the adjustment ring to change the maximum travel distance between the poppet and the valve seat. A spring may bias the poppet and the valve seat away from each other.

Abstract: According to various aspects, exemplary embodiments are provided of valve apparatus and combination filter valve assemblies. One exemplary embodiment provides a combination filter valve apparatus suitable for filtering objectionable particulate matter from a fluid and for selectively occluding a fluid flow opening. In this exemplary embodiment, the apparatus generally includes an outer member, a sealing member, and filtration media disposed generally between the outer member and the sealing member. The filtration media may be configured to generally support the sealing member for resilient movement relative to a fluid flow opening between open and closed positions. In the open position, the sealing member may be spaced apart from the fluid flow opening. In the closed position, the sealing member may be in sealing engagement with and substantially blocking the fluid flow opening, thereby inhibiting the ingress of fluid into or egress of fluid out of the fluid flow opening.

Abstract: The invention is directed to an excess flow valve having a feather gasket positioned near a valve seat. The excess flow valve also has a piston assembly with a first disc-shaped piston and a second disc-shaped piston. Each piston also has at least one orifice defined therein and has an upstream face and a downstream face. In one embodiment, the excess flow valve has a spring positioned in the housing against the downstream face of the second piston such that the spring exerts a force on the second piston in a direction opposite the general fluid flow direction. When flow forces acting on the piston assembly sufficiently exceed the spring force acting on the second piston, the piston assembly moves in the flow direction until a stop engages a valve seat to shut off fluid flow through the valve. The feather gasket reduces a bypass flow past the valve seat.

Abstract: A flow shut off valve for residential water line pressure includes a self cleaning valve element held in a housing having an inlet, an outlet section and an outlet adapter with a fluid passage connecting the inlet and the outlet adapter. The inlet and the outlet adapter include exterior threads for connection to a further item. The valve element is slidably mounted within a passage in a poppet guide and metering slot insert having one or more metering slots that allow variable fluid flow between the inlet and outlet adapter. A spring biases the valve element toward the inlet. Reduced back pressure at the outlet adapter drives the valve element into a closed position with a sealing surface against the valve seat to terminate flow. The flow shutoff valves are contemplated for integration with stop valves supplying water to employment with household appliances, sinks, toilets and the like.

Abstract: A flow activated valve includes an outer body and a piston disposed in an inner cavity of the outer body. The flow activated valve also includes one or more fluid passage exits in the outer body and one or more piston fluid passages in the piston. The one or more fluid passage exits and the one or more piston fluid passages allow fluid flow out of the valve. The flow activated valve also includes a flow restriction member disposed in a piston inner cavity. In addition, the flow activated valve includes a shear member disposed in the outer body, and a bias member disposed in an inner cavity of the outer body. The flow activated valve further includes a position control member disposed in the piston and a sealing member.

Abstract: The valve comprises a housing defining a flow passage, an outer cylindrical wall, an inner cylindrical wall, and a valve seat. An annular cavity is formed between the outer cylindrical wall and the inner cylindrical wall. A valve member is slidably mounted within the housing. The valve member includes an annular skirt section extending in the downstream direction. A downstream-facing portion of the valve member comprises a sealing portion configured to selectively engage the valve seat. The valve member is movable between an upstream no flow position, a downstream shutoff position, and a normal flow position intermediate the no flow position and the shutoff position. A biasing element is disposed between the housing and the valve member so as to bias the valve member away from the valve seat.

Abstract: A flow shut off valve for residential water line pressure includes a housing having an inlet, an outlet and a passage there between with a valve seat in the passage. A valve element is slidably mounted within the passage and includes a cavity open to the inlet and orifices partially restricting flow from the cavity to the passage. A spring biases the valve element toward the inlet. Reduced back pressure at the outlet drives the valve element into a closed position with a sealing surface against the valve seat to terminate flow. The restrictive orifices in the valve element extend from the cavity to the periphery of the valve element and, in a position toward the inlet, the restrictive orifices are closed by the housing to block communication between the inlet and the outlet. In an intermediate position, the orifices are open and the sealing surface is not against the valve seat. A motion damper may be employed to allow for start-up conditions on sprinkler systems and the like.

Abstract: The present flow shutoff valve comprises a flow metering sleeve positioned within a flow passage. The sleeve and a housing of the valve define an annular space. The sleeve includes a flow metering aperture downstream of the annular space. A valve member is slidably mounted within the sleeve. The valve member is movable between a no flow position, a normal flow position and a shutoff position. The valve is self cleaning, so that it reduces the buildup of sediment within the valve.