Abstract: Embodiments disclosed herein relates in part to selectively shutting off the flow of water through a water supply pipe to a building, such as in the event of a broken water pipe. The embodiments disclosed herein also optionally discontinue electrical power to a water heater to minimize the risk of water heater elements burning out in the event a water heater is at the risk of being drained of water, such as due to a broken water pipe.

Abstract: Embodiments disclosed herein relate in part to water flow sensors, and also to such water flow sensors in combination with a system used to selectively shut off the flow of water through a water supply pipe to a building, such as in the event of a broken water pipe. Such systems included in the combination can also optionally discontinue electrical power to a water heater to minimize the risk of water heater elements burning out in the event a water heater is at the risk of being drained of water, such as due to a broken water pipe.

Abstract: A shut-off valve for preventing the flow of liquid through a conduit is described herein. The valve includes a valve body which defines a fluid passage, a portion of which can be venturi-shaped. The valve also includes a flow barrier which has a dimension sufficient to block fluid flow through the passage. The flow barrier is movable between an open position which allows fluid flow through the passage, and a closed position which prevents such flow. A target for detecting liquid flow is pivotally attached to the flow barrier, and is exposed to liquid flow and gas flow when the flow barrier is in the open position. When liquid flow hits the target, it swings away from the direction of flow, thereby pivoting the flow barrier to the closed position. Related methods for preventing the flow of liquid through a conduit are also described.

Abstract: The invention is for a safety valve for a piping system. The safety valve has a cylindrical housing, a piston assembly with two disc-shaped pistons, each piston having at least one orifice defined therein, a shaft connecting the pistons, a valve stem, and a stop attached to one end of the valve stem. The safety valve has a valve seat with an opening shaped and sized to receive the stop. The safety valve has a spring positioned in the housing against the piston assembly so that the spring exerts a spring force on the second piston in a direction opposite the direction of fluid flow. When fluid forces acting on the piston assembly exceed a spring force acting on the piston assembly, the piston assembly moves in the direction of flow until the stop engages the valve seat and shuts off flow through the safety valve.

Abstract: A safety valve assembly for use with a global manual valve which is installed on a high pressure cylinder or container. The safety valve assembly has a main body that is threaded into the lower bore of the global manual valve. A poppet valve slides into the bore of the main body and is restrained by a valve seat. An end cap is then threaded into the lower end of the main body to keep the poppet valve inside. The poppet valve has longitudinal flutes formed on the surface for regulated passage of gases and fluids. The poppet valve also has a cone on the upper end, which can have bleeder veins inscribed on its surface. When activated, the poppet valve prevents the uncontrolled release of high pressure out of the cylinder. Thereafter, the bleeder veins permit the release of small amounts of high pressure until the cylinder is exhausted to a safe level.

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 gas safety valve includes a main body having a longitudinal through-hole consisting of a first section, a second section, and a third section with different inner diameters. A ball and a restraining member are mounted in the first section. A spring is mounted in the second section, with an end of the spring protruding out of the second section for biasing the ball away from the second section. An outer sleeve is force-fitted in the third section of the main body. A hollow adjusting block is mounted in the outer sleeve and has an outer threading for threadedly engaging with an inner threading of the outer sleeve. The other end of the spring abuts against the adjusting block. Adjustment of a position of the hollow adjusting block in the outer sleeve changes a distance between the ball and the second section.

Abstract: A flexible connector incorporates an excess flow shutoff at its inlet to prevent uncontrolled flow in the event of a failure such as rupture or separation of the connector. A shutoff sleeve moves in a body between an upstream, open position and a downstream, closed position. A spring biases the shutoff sleeve toward the open position. The sleeve includes a flow metering passage, and a pressure drop resulting from excess flow through the passage moves the sleeve to the closed position against a shutoff seat. A time delay is provided by a damping system including a variable volume damper chamber defined in part by a flexible bladder. Upstream pressure is communicated to the damper chamber by a restricted flow passage provided by metal to metal contact of a washer against a body surface.

Abstract: A timing regulator, having an operation temperature of the timing regulator from ?40° C. to 55° C., includes a valve body which has a gas discharging end for connecting to an outdoor gas apparatus and a safety gas connector provided at a gas inletting end for securely connecting to a gas source, a gas controller including a safety device for blocking the gas flow passing through the valve body when a gas pressure at the gas discharging end of the valve body is higher than a safety gas pressure at the gas inletting end thereof, and a timer device disposed in the valve body for selectively regulating the gas flow via a preset time frame.

Abstract: The riser line shutoff valve where oxygen flows into the valve from the inlet and through an orifice in the piston. This orifice creates differential pressure between the upstream and downstream side of the piston. When the differential pressure across the piston exceeds the spring load and friction between the piston and the valve body, the piston moves to the left and seats on the brass probe in the conical area of the piston, preventing the flow of oxygen. The valve will not open until the upstream pressure is removed. The base of the brass probe has holes, allowing oxygen to flow out of the outlet port when the valve is open. The probe is threaded into the probe base allowing for valve adjustment for proper operation. The spring simultaneously serves the functions of retaining the probe base and providing a piston load to keep the piston open until the critical flow rate is reached.

Abstract: Methods and devices for shutting off flow in fluid lines by an automated remote sensor signal, when leakage is detected, are disclosed. A shutoff valve has an inlet for connection to the upstream end of the pressurized fluid line, an outlet for connection to the downstream end of the pressurized fluid line, and a springless actuator for driving a valve between open and closed positions. A normally closed solenoid valve is connected between the upstream end of the pressurized fluid line and the springless actuator. A two-position fluid reset switch is also connected to the springless actuator. The shutoff valve further comprises a region of reduced pressure downstream of the actuator but prior to the outlet for connection to the downstream end of the pressurized fluid line. The region of reduced pressure is connected through the fluid reset switch to the springless actuator.

Abstract: The invention is therefore directed to a rotary valve actuating system coupled to a pipeline for a pressurized fluid, the actuating system being coupled to the rotary valve to selectively cause operation of the valve. The valve actuating system comprises at least two reservoirs having an amount of an operating liquid in a first portion being coupled to an external source of pressurized fluid in a second portion thereof. A slideable piston is positioned within each of the reservoirs to isolate the first and second portions, and upon application of pressure from the external pressurized fluid against the slideable piston, operating liquid is supplied to actuate the rotary valve. In this manner, the operating liquid is isolated from the external source of pressurized fluid, such as supplied from the pipeline.

Abstract: A fluid shutoff apparatus utilizes a float [121] of a float chamber [115] connected to a float-operated valve [113] to provide positive shutoff of fluid to a downstream load upon excessive flow from the fluid outlet [109] of the apparatus. The float-operated valve is shut when fluid discharge from the apparatus is greater than the flow rate from a flow-limiting valve [103] connected to a fluid inlet [107], decreasing the fluid level in the float chamber. The volume of the float chamber prevents inadvertent shutoff of fluid due to normal perturbations in flow to the load.

Abstract: A protection device which is capable of cutting off a pipeline when the pipeline leaks due to the rupture of the pipe self-operatedly closes the pipeline using fluid kinetic energy. A control rod converts linear movement of a piston into the opening and closing movement of a main valve core. The piston separates a hydraulic cylinder chamber into a first chamber and a second chamber. A restoring spring in the first chamber restores a control piston to an initial position. A control valve in the second chamber controls discharge of fluid from the second chamber. A flow state-sensing device introduces fluid in the fluid pipe to the second chamber when the fluid pipe ruptures and leaks.

Abstract: A liquid flow control valve has a valve body 10 in which is mounted a valve member 41 moveable between valve open and closed positions. A turbine 15 senses liquid flow through the valve body 10 and generates electrical pulses which are counted by a control circuit, over a pre-set period. An electro-magnet 54,55 controls operation of the valve member 41 and is driven by the control circuit so as to close the valve in the event that flow continues for longer than the pre-set period or the flow is greater than at a pre-set rate. The valve may also be closed should the temperature fall to about 0° C.

Abstract: The present invention is to provide a thermally-sensitive safety device for gas tubing including a main body provided with an inlet, an outlet and a gas passage communicated with said inlet and said outlet, and a thermally-sensitive control valve mounted in the gas passage. The control valve has a ball, which is normally biased by a spring to stop against a thermally-sensitive member, and a bushing with through hole in alignment with the ball. The thermally-sensitive member melts while ambient temperature is higher than the melting point thereof, whereby said ball is biased by said spring to contact against and seal the through hole of the bushing such that the gas passage is blocked off.

Abstract: The riser line shutoff valve where oxygen flows into the valve from the inlet and through an orifice in the piston. This orifice creates differential pressure between the upstream and downstream side of the piston. When the differential pressure across the piston exceeds the spring load and friction between the piston and the valve body, the piston moves to the left and seats on the brass probe in the conical area of the piston, preventing the flow of oxygen. The valve will not open until the upstream pressure is removed. The base of the brass probe has holes, allowing oxygen to flow out of the outlet port when the valve is open. The probe is threaded into the probe base allowing for valve adjustment for proper operation. The spring simultaneously serves the functions of retaining the probe base and providing a piston load to keep the piston open until the critical flow rate is reached.

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: An adjustable timing system controlled by a water meter indicator activates an electric shut-off valve at a main water supply to a building or apartment unit if a continuous flow of water exceeds the time setting. The timing system may optionally be set to a full open condition bypassing the timing function and allowing unrestricted water flow or an off condition preventing any water flow. The timing system is reset to begin anew timing the continuous flow of water each time that flow ceases and may be manually reset after a continuous flow of water has exceeded the time setting or a power interruption has disabled the water flow.

Abstract: An automatically actuated regulation system for a natural gas pipeline having flow control unit, a vibration sensor, a gas flow meter, a trigger unit, and a microprocessor. The microprocessor actuates the flow control unit when two conditions are met. First, there must be a vibration which surpasses a predetermined threshold. Second, flow in the natural gas pipeline must have increased over the flow rate before the vibration. The system can be configured to store gas usage data and, in one embodiment, transmit the data to another location through the use of a modem or other communication means.

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: The present invention discloses a protection device which is capable of cutting off the pipeline when the pipeline leaks due to the rupture of the pipe, and is aimed to achieve the object of self-operatedly closing the pipeline using fluid kinetic energy when a pipeline ruptures and leaks. The protection device comprises a main valve (1) and a control device for the main valve. The main valve (1) comprises a valve body (2) communicating with a fluid pipe (3), a main valve core provided in the valve body and a main valve stem (4) connected with the main valve core.

Abstract: A fluid shutoff apparatus utilizes a float [121] of a float chamber [115] connected to a float-operated valve [113] to provide positive shutoff of fluid to a downstream load upon excessive flow from the fluid outlet [109] of the apparatus. The float-operated valve is shut when fluid discharge from the apparatus is greater than the flow rate from a flow-limiting valve [103] connected to a fluid inlet [107], decreasing the fluid level in the float chamber. The volume of the float chamber prevents inadvertent shutoff of fluid due to normal perturbations in flow to the load.

Abstract: A full-flow mechanical failsafe (100) is composed of a cylindrical shell (101) having a movable sealing plug (105) therein, for attachment to a filter element (110) of a fluid filtering system, such as a gas clean up system in a power plant. The sealing plug (105) rests on locking spheres (107) within the shell (101) during normal operation. Upon filter failure or breakage, the flow fluid will be substantially increased, causing an increase in upward pressure against the sealing plug (105), forcing it upward off the spheres (107) and into sealing contact with a flow aperture (102, 103), shutting off fluid flow. The spheres (107) move downward into a locking position upon movement of the sealing plug (105), to secure the sealing plug (105) in its upward sealing position. The failsafe (100) can be used in fluid flow control systems other than fluid filtering systems, such as oil or gas pipelines, and can be used to prevent improper reverse fluid flow.

Abstract: A full-flow mechanical failsafe is composed of a cylindrical shell having a movable sealing plug therein, for attachment to a reaction tube of a fluid treatment system, such as a gas clean up system in a power plant. The sealing plug rests on locking spheres within the shell during normal operation. Upon reaction tube failure or breakage, the flow of fluid will be substantially increased, causing an increase in upward pressure against the sealing plug, forcing it upward off the spheres and into a sealing contact with a flow aperture, shutting off fluid flow. The spheres move downward into a locking position upon movement of the sealing plug, to secure the sealing plug in its upward sealing position. The failsafe can be used in fluid flow control systems other than fluid filtering systems, such as oil or gas pipelines, and can be used to prevent improper reverse fluid flow.

Abstract: A main water supply (1) is equipped with a main valve (2) followed by a first main pipe (3) running through a first check valve (4), and further to a first adapter (6) while a pilot pipe (7) runs from the main valve (2) through a secondary valve (9) and further a pilot coupling (16). A pressure pipe (12) runs to a secondary valve (9). From the first main pipe (3), a branch pipe (26) runs through a second check valve (28) to a water heater (27) and a second main pipe (29) runs to a second adapter (6.1) through a third check valve (30). A solenoid valve (17) is operated by a timer (18) or by the control signal of a household appliance. Pressure sensors (23, 33) signal of a household appliance. Pressure sensors (23, 33) signal to lamps (23, 34) on a panel(25).

Abstract: The invention relates to a suction device attachment (1) comprising a suction channel (5), whereby a component (9) whose insertion is to be monitored is disposed in said suction channel. A valve (V) having a movable closing body (6) in the form of a valve ball (7) that is freely retained in a valve chamber (8) is mounted behind the component (9) in the direction of flow (R). The invention aims at ensuring reliable insertion of such a vacuum cleaner attachment that is disposed in such a way as to protect against jamming, destruction or manipulation and that stops the volumetric suction flow when no component or a wrong component is inserted.

Abstract: A non-refillable valve in a compressed gas cylinder to prevent the refilling of the cylinder after depletion of compressed gas initially in the cylinder. The non-refillable valve comprises a valve housing defining a valve chamber, with the valve chamber having a proximal end and a distal end. A valve core including a valve pin is coupled to the valve housing in the valve chamber. A detent formed in the valve housing extends into the valve chamber. A check ball is positioned in the valve chamber with the check ball movable from a first position past the detent to a second position, wherein the check ball is disposed against the ball seat at the distal end of the valve chamber forming a seal that prevents refilling of the cylinder.

Abstract: A fluid-activatable shut-off device, configured as a shut-off valve, has a valve housing formed with a flow passage therethrough and a movably supported valve body, which is movable between an open valve position and a closed valve position. In the open valve position, the valve body is mainly withdrawn from the flow passage, which is thereby essentially cleared. In the closed valve position, the valve body blocks the flow passage. The valve body is arranged to close the valve by abnormal flow conditions by a portion being formed so that the flowing fluid provides a lifting force which affects the valve body and seeks to move it towards the closed position. The valve body may thereby close by an abnormal increase in the fluid flow rate, density or viscosity. The portion may also be supported by an expansion pad arranged to push the lifting surface further into the flow passage as a consequence of changes in the fluid pressure and/or temperature, thereby providing increased lift so that the valve body closes.

Abstract: A flapper-type anti-siphoning check valve for a domestic water system has an auxiliary valve built into the flapper. The auxiliary valve permits slow reverse flow of water through the check valve when the flapper is closed to prevent build-up of pressure in the user's water system, but closes as a result of more rapid reverse flow of water in the event of a sudden drop in supply pressure.

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 full-flow mechanical failsafe is composed of a cylindrical shell having a movable sealing plug therein, for attachment to a reaction tube of a fluid treatment system, such as a gas clean up system in a power plant. The sealing plug rests on locking spheres within the shell during normal operation. Upon reaction tube failure or breakage, the flow of fluid will be substantially increased, causing an increase in upward pressure against the sealing plug, forcing it upward off the spheres and into a sealing contact with a flow aperture, shutting off fluid flow. The spheres move downward into a locking position upon movement of the sealing plug, to secure the sealing plug in its upward sealing position. The failsafe can be used in fluid flow control systems other than fluid filtering systems, such as oil or gas pipelines, and can be used to prevent improper reverse fluid flow.

Abstract: A velocity fuse for a hydraulic line shuts off fluid flow when the flow rate exceeds a preset flow value. The shut off value may be adjusted while the fuse is mounted in the hydraulic circuit. A damping mechanism of the dash pot type prevents the fuse from responding to flow surges of short duration. A poppet or piston within a tubular housing reciprocates between an open position held by a spring and a closed position when flow through an adjustable aperture causes a great enough pressure drop to overcome the spring bias. The damping mechanism is unaffected by the flow rate setting.

Abstract: An input/output port 1 of a hose rupture control valve unit 100 is attached to a bottom port of a hydraulic cylinder 102, and an input/output port 2 is connected to one of actuator ports of a control valve 103 via an actuator line 105. The valve unit comprises a poppet valve body 5 serving as a main valve, a first spool valve body 6 serving as a pilot valve operated with a pilot pressure supplied as an external signal and having a pilot variable throttle portion 6a to operate the poppet valve body 5, a second spool valve body 50 operated with a pilot pressure and having a sub-variable throttle portion 50a to control a sub-flow rate, and a small relief valve 7 having the function of an overload relief valve.

Abstract: An excess flow shut-off valve has a body with a flow passageway therethrough. A closure ball is rotatably supported within the body and has a flow passageway therethrough. The ball has a first rotational position in which the ball passageway is in alignment with the valve body passageway permitting flow through the valve and a second rotational position in which the flow passageway is out of alignment with the body flow passageway, preventing flow through the valve. A closure spring biases the ball towards the second (closed) position. An actuator has a first position holding the ball in the first (open) position. A paddle extending from the actuator into the body flow passageway. Fluid flow through said valve impinging on the paddle and tends to displace the actuator against the bias of the actuator spring. The bias of the actuator spring is overcome by excess fluid flow impinging on the paddle to thereby permit the ball to rotate to the valve closed position.

Abstract: A safety valve for use in a wellbore formed in an earth formation, comprising a valve body having a fluid passage for passage of a stream of hydrocarbon fluid flowing from the earth formation via the wellbore to the earth surface, a closure member movable relative to the valve body between an open position in which the fluid passage is open and a closed position in which the closure member closes the fluid passage, and an activating device for selectively subjecting the closure member to a drag force of selected magnitude, the drag force being exerted by the stream of fluid and inducing the closure member to move from the open position to the closed position thereof. The safety valve further comprises control means for controlling the activating device to subject the closure member to said drag force.

Abstract: A water shut-off valve assembly comprises a valve that is moveable by a motor between open and closed positions. The water shut-off valve assembly is adapted to be connected to a water line. A sensor is also associated with a valve assembly for sensing leakages that occurred downstream from the valve assembly. A controller is operatively connected to the water shut-off valve assembly for actuating the electric motor which in turn actuates the valve therein. From time to time, the water shut-off valve assembly exercises or moves the valve within the valve assembly so as to prevent the valve from becoming clogged due to inactivity over a period of time.

Abstract: A fluid-activatable shut-off device, configured as a shut-off valve, has a valve housing formed with a flow passage therethrough and a movably supported valve body, which is movable between an open valve position and a closed valve position. In the open valve position, the valve body is mainly withdrawn from the flow passage, which is thereby essentially cleared. In the closed valve position, the valve body blocks the flow passage. The valve body is arranged to close the valve by abnormal flow conditions by a portion being formed so that the flowing fluid provides a lifting force which affects the valve body and seeks to move it towards the closed position. The valve body may thereby close by an abnormal increase in the fluid flow rate, density or viscosity. The portion may also be supported by an expansion pad arranged to push the lifting surface further into the flow passage as a consequence of changes in the fluid pressure and/or temperature, thereby providing increased lift so that the valve body closes.

Abstract: A gas stream monitor shall be provided that facilitates the adjustment of the reseat flow. The gas stream monitor consists of a gas-tight casing whose interior is equipped with a seat for a reseat body that is movable inside the casing and is kept in open position against the flow direction by weight and/or spring force, in which the flow cross-section, surface area of the reseat body and the forces are determined in such a manner that gas stream monitor leaves its open position at a defined value of the reseat flow and is moved towards the seat of the casing, so that the gas conduit is closed in the shut position, and has outside the casing at least one manipulator to adjust the spring pre-tension and/or the stroke of the reseat body. The gas stream monitor serves to automatically shut off gas conduits upon the occurrence of an inadmissible flow increase due to, e.g. a damaged gas conduit or a defective consumer.

Abstract: A cylinder (32) is hermetically attached into an attaching bore (31) formed within a housing (4) and is made to advance and retreat between a take-out position (A) and a charging position (B). A check valve chamber (28) is formed within the cylinder (32). A check spring (43) resiliently pushes a check valve member (29) inserted into the check valve chamber (28) toward a check valve seat (42). The cylinder (32) has an outer surface provided with an actuation portion (50). If the actuation portion (50) is pushed, it retracts the cylinder (32) toward the charging position (B). Provided at a position opposing to the check valve member 29 through a chamber inlet (40) of the check valve chamber (28) is a receiving portion (46), which receives the check valve member (29) on a halfway while the cylinder (32) is retreating.

Abstract: A hose rupture control valve unit includes a housing provided with two input/output ports. One input/output port is directly attached to a bottom port of a hydraulic cylinder, and the other input/output port is connected to one of actuator ports of a control valve via an actuator line. Within the housing, there are provided a poppet valve body serving as a main valve, a spool valve body serving as a pilot valve which is operated with a pilot pressure supplied as an external signal from a manual pilot valve, thereby operating the poppet valve body, and a small spool having the function of an overload relief valve. The above construction reduces the number of components arranged in a flow passage through which a hydraulic fluid passes at a large flow rate, and hence a pressure loss. A further reduction in overall size and production cost of the valve unit is achieved.

Abstract: A water flow-sensing device includes an assembly with a stationary metering rod with a cylindrical portion and a conical portion and a relatively moveable element in the shape of a hollow cylindrical toroid. The relatively moveable element is biased by a spring to a rest position wherein the cylindrical portion of the stationary metering rod blocks flow through the relatively moveable element. During fluid flow, fluid pressure moves the relatively moveable element so that the conical portion of the stationary metering rod is within the hollow portion of the relatively moveable element thereby creating a flow area and allowing flow therethrough. A toroidal ferrite is biased against the relatively moveable element and moves in unison therewith. The position of the toroidal ferrite is electromagnetically determined thereby allowing for a calculation of the fluid flow therethrough. Low flowrates indicative of a trickle leak and large flowrates indicative of a large leak can be detected.

Abstract: An automatic fluid shut-off device for interrupting fluid flow through a fluid supply path in a fluid delivery system. The automatic fluid shut-off device includes: a fluid flow sensor structured and disposed for monitoring fluid flow in a fluid supply path; a control panel housing, a central processing unit, and including a visual display panel, programming buttons, and indicator lights; and either a solenoid actuated fluid shut-off valve or relay that interrupts power to a fluid pump. The fluid flow sensor monitors fluid flow in the fluid supply path and outputs the fluid flow data to the central processing unit. The central processing unit compares the measured fluid flow value with the value preprogrammed for the particular operating conditions or for the particular active zone in a multi-zone fluid delivery system.

Abstract: The present invention is a valve that shuts off only upon excess flow of liquid. A ball is seated within a ball holder. The ball holder has a circumferential side wall. An inlet orifice and one or more circumferential apertures are defined in the circumferential side wall. An outlet orifice is defined in a surface disposed above the ball holder. The ball holder may be disposed within a main body which directs all material flowing in the valve to enter the ball holder. Excess flow of liquid effects a shut-off position of the valve when the excess flow of liquid encounters resistance caused by the circumferential apertures. The resistance causes the liquid to flow through the inlet orifice at a flow high enough to push the ball upwards to a height at which the flow of liquid through the circumferential apertures carries the ball further upward to effectively seal the outlet aperture, at which point the sealed position is maintained by hydrostatic pressure.

Abstract: A mechanical leak arresting valve is disclosed in which fluid through the valve is limited to a range between a predetermined minimum flow rate and a predetermined maximum flow rate, and where both a small or large downstream leak mechanically causes the valve to lock closed. The present invention uses a locking mechanism triggered by a pressure differential resulting from the downstream leak to block the flow of fluid through the valve until the fluid source upstream is stopped. Reduction of the upstream pressure by the stopping of the fluid source automatically resets the valve without further manipulation.

Abstract: A gas safety valve includes a main body having a longitudinal through hole that defines a gas passage. A ball is moved to a position blocking the gas passage when a sudden pressure drop occurs in the outlet end of the gas passage. A connector is mounted around a portion of the main body and includes an inner flange. An insert is mounted between the inner flange of the connector and an outer flange of the main body.

Abstract: A shutoff valve assembly interposed in a fluid line for monitoring fluid flow volume and closing a fluid conductor, in the event of fluid flow volume above a predetermined value. The valve assembly contains a valve seat and a normally open piston valve for sealing with the seat and includes opposing piston rods each slidably supported at one end portion by end caps. The piston valve is normally fluid pressure balanced by equal upstream and downstream rod end surface areas. A plate is secured to the body by posts in axial spaced relation with respect to the downstream end portion of one piston rod for supporting a pressure collapsible rod-like pin in accordance with Euler's law for slender columns, axially interposed between the plate and the adjacent piston valve rod.

Abstract: An ammonia excess flow valve has a seal ring (24) slidably positioned around at least two retainer vertical members (22B). A disk (26) has a disk central opening (26A) and a disk pin opening (26B) therethrough. The disk (26) is positioned adjacent to and below a retainer (22). A conduit (28) sealably connected to the disk (26) over the disk pin opening (26B) extends upwardly therefrom. The conduit (28) functions to permit the ammonia excess flow valve (10) to be reset by equalizing pressures on both sides of the disk (26) once excess flow that trips the ammonia excess flow valve (10) is remedied, minimizing creation of vapor.

Abstract: A flood control device measures fluid flow into a house or building and shuts off the fluid flow if measured flow conditions indicate an overly high consumption due to a leak, break, or other abnormal condition which is present in the plumbing system of the house or building.