Abstract: An excess flow valve includes: a valve that opens and closes a flow path; a solenoid that keeps the valve in an opened state; a pressure detector detecting the primary-side pressure of the valve; and a controller controlling current flow to the solenoid based on pressure detected by the pressure detector so that the valve is closed when the flow rate supplied to the valve is at or more than a predetermined amount. The excess flow valve can be used in a wide variety of applications and prevents a flow of fluid at or greater than a desired flow rate even if the primary-side supply pressure varies.

Abstract: A drain valve having a temperature responsive member that holds the drain valve in a water conserving mode when water is above freezing yet allows the drain valve to drain when the water is near freezing to prevent freeze damage to the irrigation system.

Abstract: Disclosed is a flow regulator, especially for insertion into a jet regulator in an outlet fixture, comprising an insertion member that is penetrated by at least one flow duct in an axial direction as well as a throttle element which forms a control gap along with the insertion member in order to allow a fluid to penetrate into the at least one flow duct. The aim of the invention is to create a flow regulator which allows for significantly greater durability during use while offering maximum ease of operation when fluid is discharged. Said aim is achieved by a flow regulator in which the throttle element is embodied as a dimensionally stable throttle cap that is supported in relation to the insertion member via an elastic spring element.

Abstract: The hydraulic system safety shut off valve is a safety valve for use immediately downstream from a hydraulic pressure power supply line and before the operational control valves and subsystems. It includes a velocity fuse having an inlet and an outlet, a surge chamber having an inlet and an outlet, and, a connecting port, which connects the inlet outlet of the velocity fuse to the inlet of the surge chamber.

Abstract: A safety valve for a lawn sprinkler system having at least one subterranean flow line and at least one head for spraying irrigation water. The valve includes a tubular member connected between the flow line and the head. The tubular member has an axial passage therethrough for the flow of water from the flow line to the head. A seat is located within the passage. A ball is located in the passage upstream of the seat. The ball is axially movable from an open position upstream of the seat to a closed position in engagement with the seat if the water flowing through passage reaches a selected flow rate. A coiled spring in the passage is in engagement with the ball for urging the ball toward the open position.

Abstract: A poppet mounted concentrically on a barrel for axial travel downstream relative thereto from an open to closed position, the poppet biased by a coil sprint to its open position.

Abstract: A combination neutral valve and check valve assembly is provided for use in connection with a closed hydraulic circuit and a sump such as in a hydrostatic transmission. A cage and check poppet are mounted in a valve body having an opening between the hydraulic circuit and sump. The check poppet is movable between a first position where it closes the valve opening and a second position where it is disengaged from the opening. A check compression spring is mounted in the cage and biases the poppet to the engaged position. A valve shuttle is located in the check poppet and movable between a first position where it closes a check poppet opening and a second position where it is disengaged from the opening. A neutral valve spring is engaged to the valve shuttle and the check poppet to bias the valve shuttle to the disengaged position.

Abstract: An automatic flow rate control valve, includes a tubular body, defining a flow path between inlet apertures having a gradually variable cross-sectional area and a fluid outlet at one end; a flow control piston is axially movable within the tubular body, under opposite actions of the fluid pressure and a biasing spring, to choke the fluid inlet apertures, while maintaining a constant flow rate. The control piston is in the form of a first cup-shaped element sliding on a second cup-shaped element to define a hydraulic damping chamber, communicating with the flow path.

Abstract: Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.

Abstract: A first expression of a flow-control valve assembly includes a valve body and a resilient flow control positioned in the valve body. The valve body has a valve seat including a radially-inner valve seat portion, a radially-outer valve seat portion and a bypass-flow-channel exit located between the two seat portions. The flow control has a top surface, a bottom surface, and a through passage. The bottom surface is spaced apart from the radially-inner valve seat portion under a lower fluid pressure against the top surface exposing the bypass-flow-channel exit. The bottom surface seats against the radially-inner valve seat portion under a higher fluid pressure blocking the bypass-flow-channel exit. A second expression of a flow-control valve assembly includes a valve body having a bypass-flow-channel exit and includes a resilient flow control which has a substantially-constant-diameter outer cylindrical surface and which has a bottom surface devoid of any protrusion.

Abstract: A fluid flow control valve includes a housing having a fluid inlet and a fluid outlet, which define a flowpath therebetween. Within the housing is a chamber located in the flowpath between the fluid inlet and the fluid outlet. A valve member is mounted within the chamber from movement between an open position, allowing for flow along the flowpath, and a closed position, which prevents such flow. The valve member is biassed to the open position. The fluid control valve further includes a device for regulating fluid pressure to enable the fluid pressure to be set on the inlet side of the valve member.

Abstract: A two-stage fluid pressure control valve has five components. An inlet socket with separate fluid flow orifices sealably engages an outlet socket which also has separate fluid flow orifices. A pressure check piston having a fluid flow orifice along its longitudinal central axis slidably engages the inlet socket and the outlet socket. A spring located along the central axis of the outlet socket biases the pressure check piston in an open position, allowing fluid to flow through all orifices. Fluid flow through the control valve may impact the pressure check piston to overcome the spring force, moving the pressure check piston to a closed position, whereby fluid flows only through the orifice in the pressure check piston.

Abstract: A pressure switch or valve for a hydraulic circuit that responds primarily to fluid flow as opposed to relying strictly on a pressure gradient across the valve. A T-shaped valve has a stem portion disposed within an opening in a reservoir or other fluid passage. The valve is spring biased in an open position. A valve head has an area significantly larger than an area of the opening. As fluid flows around the edge of the valve head, the fluid speed increases and induces a pressure gradient across the valve head to overcome the spring bias and close the valve. The valve may be employed in a wall surface of the reservoir or fluid passage having an area significantly larger than the valve head.

Abstract: A valve operable with an associated fluid delivery system having fluid flow therethrough includes a housing, a valve body and a resetable excess flow valve. The housing has a first passage and the valve body is disposed along the first passage and including a wall at least partially defining a second passage. The excess flow valve is supported along one of the first and second passages. The valve body is displaceable between a first position permitting flow through the second passage and a second position substantially shutting-off fluid flow and resetting the excess flow valve.

Abstract: A surge suppressor and safety shut-off valve is described which automatically shuts off fluid flow in response to a sufficient pressure differential across the valve. The shut-off valve comprises a valve body adapted for use within a fluid distribution system through which a predetermined flow of a fluid is nominally allowed to pass. A flow restricting means is disposed therein that reduces the maximum flow when triggered by a sufficient pressure differential between inlet and outlet. By way of example, the flow restricting means is preferably provided by a poppet which is slidably engaged within the valve chamber to restrict fluid flow therethrough. The poppet is preferably adapted with a very low volume bypass port through which opposing pressures at valve inlet and outlet may be equalized for automatically resetting of the valve after the surge has passed, or a rupture has been repaired.

Abstract: An air turbine starter is provided that includes a check valve assembly. The check valve assembly comprises a valve body, a valve seat and a valve element. The valve body includes an inlet port, an outlet port, and a flow passage extending therebetween. The valve seat is coupled to the valve body, extends at least partially into the flow passage and has an opening therethrough. The valve element is disposed within the flow passage between the valve seat and the valve body outlet port. The valve element is also configured to translate axially between an open position and a closed position in response to a pressure differential between the inlet and outlet ports.

Abstract: Valves and methods for manufacturing the valves are disclosed. The valves are formed from a plurality of flexible polymer layers. A radio frequency bonding process, or the like, is utilized to form welds between the various layers. In general, a sub-assembly is formed that includes a valve layer bonded to a substrate layer. The sub-assembly is bonded to a second element such that a channel is formed between the valve layer and the second element. The channel includes an inlet, an outlet, and a pair of weld beads located in the inlet that place the inlet in an open configuration.

Abstract: A reactive speed hump (2) includes a fluid flow control valve assembly (4). A first valve (18, 20, 21) is naturally open and a second valve (10, 14, 15, 16, 17), naturally closed. Application of fluid pressure on the control valve assembly below a first lower threshold level or above a second higher threshold level allows a flow of fluid from the inlet to the outlet, but an application of fluid pressure on the control valve between said first and second threshold levels allows substantially no fluid to flow between the inlet (7) and the outlet (9).

Abstract: A fuel system shut-off valve includes a valve body bounding a fuel space, the valve body having an inlet opening and an outlet opening communicating with the fuel space. A piston assembly in the fuel space includes a main piston member that is movable relative to the valve body and an auxiliary piston member that is movable relative to the main piston member. The piston assembly either allows or prevents fuel flow through the valve from the inlet opening towards the outlet opening depending on the position of the auxiliary piston member. A force member urges the piston assembly towards the inlet opening.

Abstract: A device for regulating a flow of gas toward user equipment, which comprises a first regulation stage and a second regulation stage arranged downstream in a direction of flow of the gas to be controlled, further comprising a flow limiter interposed between the first and second regulation stages and adapted to intervene if the second stage malfunctions.

Abstract: A number of improved excess flow valves are disclosed wherein pressure drop is optimized through the device to maximize efficiency while minimizing shut-off flow rates. Flow restrictions are minimized throughout the valve structure and maximized across a valve closure plate, eliminating flow restriction variations caused by orientation of the valve components. A magnet having radially opposing poles optimizes the magnet's attractive force relationship with the valve plate.

Abstract: A surge suppressor and safety shut-off valve is described which automatically shuts off fluid flow in response to a sufficient pressure differential across the valve. The shut-off valve comprises a valve body adapted for use within a fluid distribution system through which a predetermined flow of a fluid is nominally allowed to pass. A flow restricting means is disposed therein that reduces the maximum flow when triggered by a sufficient pressure differential between inlet and outlet. By way of example, the flow restricting means is preferably provided by a poppet which is slidably engaged within the valve chamber to restrict fluid flow therethrough. The poppet is preferably adapted with a very low volume bypass port through which opposing pressures at valve inlet and outlet may be equalized for automatically resetting of the valve after the surge has passed, or a rupture has been repaired.

Abstract: A check valve is mounted in a valve arrangement having a valve member with an annular channel and at least one bore opening into the annular channel. The check valve has a closing element configured to close the at least one bore in the annular channel. The closing element is formed of a strip shaped as a ring. The strip of the check valve is arranged in the annular channel of the valve member.

Abstract: There is to be created a gas flow monitoring device in which the adjustment/alteration of the reseat flow can also be made without the need of changes to its design, that is to say even after its manufacture. In particular, it should be possible to adjust the reseat flow at the time of its installation on site. To this end, the gas flow monitoring device consists of a gas-tight casing (1) with a valve seat (6) in its interior for a reseat body (14) that can freely move inside the casing (1). Said reseat body (14) is fastened to a pin (11) that is supported by bearings located in both the inlet guide (7) and the outlet guide (8). Said reseat body (14) is kept in open position by a reseat spring (16) that rests with its one end on the outlet guide (8) and with its other end on the reseat body (14) itself. At the inlet guide (7) there is arranged a spacer block (17) that acts as a stop point (18) for the reseat body (14) with the gas flow monitoring device in open position.

Abstract: Hydraulic valve with a valve chest (1) provided with a substantially cylindrical internal chamber (5) which may be closed by a valve disc (9) which with its conical rim (9?) engages the facial rim of the internal chamber (5), an insert member (3) being arranged in a section of the internal chamber (5) and structured as a member of sprocket-like cross-section with circular gaps (3?) between teeth forming valve passages (4) with the internal wall of the chest, the valve disc stem (6) permeating the insert member (3) being a one-piece structure and provided with a safety nut (7).

Abstract: The invention provides an apparatus for outputting compressed air in a compressor to a plurality of pneumatic tools at a plurality of pressures. The apparatus includes: an air tank storing compressed air compressed by the compressor at a high pressure; a pressure adjusting portion connected to said air tank and adjusting a pressure value of the compressed air in a region from the high pressure to zero; a pressure outputting portion connected to a secondary side of said pressure adjusting portion and outputting the adjusted compressed air to at least one of a first pneumatic tool driven at a first pressure and a second pneumatic tool driven at a second pressure. The first pressure is larger than the second pressure, and the adjusted compressed air is not output to the second pneumatic tool at the first pressure.

Abstract: A leak control valve preventing the damage of the vacuum pump and/or the neighboring instruments even in the case of fluid leak at the vessel. The side wall of the valve poppet closes the channel to the outlet through restoring forces of the springs installed at both sides of the poppet in case when the abrupt pressure change happens by accident.

Abstract: A valve which has a valve body having a through-bore to permit the flow of gas through the through-bore, an excessive flow valve disposed within the through-bore of the valve body, the excessive flow valve including a supporting tube having a plurality of struts, an axial bore extending through the supporting tube, a stem movable axially against a spring within the bore and a disk on a free end of the stem. The excessive flow valve is engaged in a through-bore of the valve body.

Abstract: A bi-directional flow-control device includes a housing defining a flow passage and first and second orifices installed in the passage, each orifice being tubular and having a seat, each seat having a plurality of circumferentially spaced flow-control channels, the seat of the second orifice being axially spaced from and facing the seat of the first orifice. A resiliently deformable diaphragm is disposed between the seats, whereby flow through the passage in a first direction urges the diaphragm against the seat of the first orifice and flow through the passage in an opposite second direction urges the diaphragm against the seat of the second orifice. The diaphragm in each case deforms into the channels in the seat to varying degrees as a function of pressure differential such that in either flow direction the flow is regulated to a substantially constant volumetric flow rate over a range of pressure differentials.

Abstract: An automatically operating valve for use for example in a forecourt fuel pump has a body (10) defining a flow passage (20) within which is formed a valve seat (22), the body having a weakened zone (16) around the flow passage (20) such that an impact on the body will fracture the body at the weakened zone. A valve member (30) is mounted for movement within the flow passage (20) and is engageable with the valve seat (22) to close the valve. A closing mechanism effects movement of the valve member (30) to its closed position in the event that the body (10) is fractured at the weakened zone. Further, the valve member (30) is configured to move to its closed position under the influence of excessive flow of liquid through the flow passage (20).

Abstract: A bi-directional flow-control device includes a housing defining a flow passage and first and second orifices installed in the passage, each orifice being tubular and having a seat, each seat having a plurality of circumferentially spaced flow-control channels, the seat of the second orifice being axially spaced from and facing the seat of the first orifice. A resiliently deformable diaphragm is disposed between the seats, whereby flow through the passage in a first direction urges the diaphragm against the seat of the first orifice and flow through the passage in an opposite second direction urges the diaphragm against the seat of the second orifice. The diaphragm in each case deforms into the channels in the seat to varying degrees as a function of pressure differential such that in either flow direction the flow is regulated to a substantially constant volumetric flow rate over a range of pressure differentials.

Abstract: A coupling for connecting a cylinder valve on an LPG tank to the inlet of a pressure regulator for gas consuming equipment comprises a nipple having an upstream end for connection with the cylinder valve and a downstream end for connection with the pressure regulator, and a plastic coupling nut for connecting the nipple to the cylinder valve. The end wall of the coupling nut has a metal heat transfer washer on the inner side thereof, and a pressure responsive flexible shutoff valve plate is provided in the nipple passageway. The shutoff valve plate closes the passageway in response to a pressure differential thereacross of no more than 15 psi, and the end wall of the coupling nut and the heat transfer washer are responsive to a temperature of between 240° F. and 300° F. to release the nipple for displacement away from the cylinder valve in the direction downstream of the nipple.

Abstract: Hydraulic valve with a valve chest (1) provided with a substantially cylindrical internal chamber (5) which may be closed by a valve disc (9) which with its conical rim (9′) engages the facial rim of the internal chamber (5), an insert member (3) being arranged in a section of the internal chamber (5) and structured as a member of sprocket-like cross-section with circular gaps (3″) between teeth forming valve passages (4) with the internal wall of the chest, the valve disc stem (6) permeating the insert member (3) being a one-piece structure and provided with a safety nut (7).

Abstract: A flow control valve is disclosed wherein a housing defines a flow chamber with an inlet and an outlet. Disposed within the flow chamber is a poppet assembly comprising an inner poppet and an outer poppet. A first spring is selected to bias the outer poppet to seal closed the inlet below a predetermined fluid flow rate. Above the fluid flow rate, the force of the fluid against the outer poppet compresses the spring, breaking the seal and allowing fluid to flow into the fluid flow chamber. Inside the outer poppet is an inner poppet which extends from the outer poppet. A second spring biases the inner poppet predominantly within the outer poppet, but an increased pressure inside the outer poppet collapses the second spring and extends the inner poppet in a fully extended position. Fully extended the inner poppet shuts the outlet of the fluid chamber thereby arresting the flow.

Abstract: An apparatus for optimizing the rheological properties of a viscous fluid is particularly designed to reduce the viscosity of the fluid so that it may be more readily transported from a subsurface reservoir to the surface. The apparatus includes housing having a first through bore defining a cross-sectional flow area and longitudinal flow path for fluid through the bore. The housing has an inlet end and an outlet end and is designed for connection in a flow path from a subsurface reservoir. A flow restriction device is adjustably mounted in the through bore to define a reduced area orifice of adjustable size for restricted flow, so as to accelerate the fluid and produce shear. A magnetic unit may also be selectively connected to the housing to produce a magnetic field across the fluid, further reducing viscosity.

Abstract: A water tapping point with a hot water inlet; a cold water inlet, a hot water space, a cold water space, a mixing chamber, a hot water outlet from the hot water space and a cold water outlet from the cold water space. A characteristic feature of the invention is passage means extending between the hot water outlet and the cold water outlet and provided with means for connection to a common return water pipe. The invention also relates to a tap water network comprising a plurality of tapping points. The tap water network needs only one return water pipe.

Abstract: An improved valve and manifold for use in conjunction with inflatable devices such as rigid hull inflatable boats or ribs, life rafts, escape slides, white water rafts, kayaks, etc. The invention is specifically an external cross over valve for inflatable rafts and the like where the valve fluidly connects at least two separate compartments in the inflatable device thereby allowing inflation of the multiple compartments while also providing control of fluid flow therebetween.

Abstract: A leak control valve preventing the damage of the vacuum pump and/or the neighboring instruments even in the case of fluid leak at the vessel.

Abstract: A vent valve for an air braking system of a vehicle comprises an elastomeric valve member (11) held in relation to a vent (17) and having a restricted vent passageway. A continuous depending rib (23) is engageable with a valve seat (28) to close the vent passageway as increasing pressure acts on the head (21) of the valve member (11). The valve member (11) permits a fluid chamber to be connected to exhaust until pressure in the chamber reaches a predetermined level.

Abstract: A flow shut off valve for use with a pressurized fluid application and which is actuated in response to a flow rate exceeding a maximum allowable rating, the fluid application including a normally regulated and pressurized fluid supply, a length of a conduit extending from the fluid supply. The valve includes an elongated and substantially cylindrical shaped housing interposed between the fluid supply and the extending conduit, the housing having an inlet end communicating with a first coupling extending from an outlet of the fluid supply and an outlet end communicating with a second coupling extending from an inlet of the length of conduit. The housing further including an axially extending interior extending between the inlet and outlet ends.

Abstract: A number of improved excess flow valves are disclosed wherein the flow around a magnet holding portion of the valve body is generally unrestricted to reduce the pressure drop across the valve. The valve is preferably also formed separately from its valve seat to reduce the complexity of the valve, and allow it to have less resistance to flow. The valve seat may be provided as a separate part, or may be provided in the conduit.

Abstract: A fuel system shut-off valve includes a valve body bounding a fuel space, the valve body having an inlet opening and an outlet opening communicating with the fuel space. A piston assembly in the fuel space includes a main piston member that is movable relative to the valve body and an auxiliary piston member that is movable relative to the main piston member. The piston assembly either allows or prevents fuel flow through the valve from the inlet opening towards the outlet opening depending on the position of the auxiliary piston member. A force member urges the piston assembly towards the inlet opening.

Abstract: A number of improved excess flow valves are disclosed wherein the flow around a magnet holding portion of the valve body is generally unrestricted to reduce the pressure drop across the valve. The valve is preferably also formed separately from its valve seat to reduce the complexity of the valve, and allow it to have less resistance to flow. The valve seat may be provided as a separate part, or may be provided in the conduit.

Abstract: A fluid control device with a reduced sound generation. The device is a nozzle-type valve that has a converging portion, a diverging portion and a throat therebetween. A diverging portion acts as a diffuser and may be conical or may have a slight curvature. In each, the diffusion angle is less than 20° so that turbulence of fluid flowing through the valve is minimized and a boundary layer is maintained between the fluid and an inside surface of the fluid control device. A control system that uses such a fluid control device is also disclosed and such device may be used either in a supply conduit or an exhaust conduit.

Abstract: A flow control valve includes a body member (1) having a bore (10) defining a fluid flow passageway. A resiliently-biased piston member (2) is mounted in said passageway for movement relative to the body member (1) in response to the differential fluid pressure across the valve. The piston member (2) defines an annular throttling orifice (28) between said piston member and said bore. At least a portion (10a) of the passageway has a non-uniform cross-section, such that the size of the annular orifice (28) depends on the position of the piston member relative to the body member.

Abstract: A flow shut off valve for use with a pressurized fluid application and which is actuated in response to a flow rate exceeding a maximum allowable rating, the fluid application including a normally regulated and pressurized fluid supply, a length of a conduit extending from the fluid supply. The valve includes an elongated and substantially cylindrical shaped housing interposed between the fluid supply and the extending conduit, the housing having an inlet end communicating with a first coupling extending from an outlet of the fluid supply and an outlet end communicating with a second coupling extending from an inlet of the length of conduit. The housing further including an axially extending interior extending between the inlet and outlet ends.

Abstract: A gas safety valve comprises a main body, a valve seat, a restraining member, and an engaging member. The main body includes an inner threading for threading engagement with the valve seat and the restraining member. The valve seat comprises a valve block, a spring, and an adjusting element. The position of the adjusting element can be adjusted when an elastic constant of the spring is not within a predetermined operational range, a distance between the valve block and the valve seat is thus varied to assure blockage of a longitudinal through-hole of the valve seat by the valve block, thereby preventing mass leakage.

Abstract: A fluid flow control valve comprises a housing defining a fluid flow passage extending longitudinally therethrough, the housing having opposite ends each defining an opening for flow into and out of the fluid flow passage, and an orifice and diaphragm disposed in the housing. The orifice has a seat at one end thereof facing the diaphragm. The diaphragm has one end face that opposes the seat of the orifice, the seat being configured such that one or more flow control passages are defined between the seat and the one end face of the diaphragm through which the fluid flows. The seat is contoured to include at least two different shapes of channels each promoting localized bending of the diaphragm at a different pressure differential, thereby permitting an expansion of the working pressure range to very low pressure differentials.

Abstract: A water valve assembly includes a valve component having defined therein a central cavity and a bypass channel. The water valve assembly also includes a flow control device positioned in the central cavity. The flow control device has defined therein a fluid passage and a sealing member secured to an outer periphery of the flow control device. The flow control device is positionable between a first pressure orientation and a second pressure orientation based on water pressure in the central cavity of the valve component. The sealing member is adapted to prevent advancement of water through the bypass channel when the flow control device is oriented in the first pressure orientation. The sealing member is adapted to allow advancement of water through the bypass channel when the flow control device is oriented in the second pressure orientation. A method of operating an appliance water valve assembly is also disclosed.

Abstract: A flow control valve is disclosed wherein a housing defines a flow chamber with an inlet and an outlet. Disposed within the flow chamber is a telescoping poppet comprising an inner poppet and an outer poppet. A first spring is selected to bias the outer poppet to seal closed the inlet below a predetermined fluid flow rate. Above the fluid flow rate, the force of the fluid against the outer poppet compresses the spring, breaking the seal and allowing fluid to flow into the fluid flow chamber. Inside the outer poppet is an inner poppet which telescopes from the outer poppet. A second spring biases the inner poppet predominantly within the outer poppet, but an increased pressure in the outer poppet collapses the second spring and extends the inner poppet in a fully extended position. Fully extended the inner poppet seals shut the outlet of the fluid chamber. In operation, the first spring shuts the valve below a predetermined flow rate guaranteeing zero flow until a minimum flow rate is present.