Abstract: To provide a solenoid valve having a sensor in which monitor devices for monitoring whether input or output pressure in the solenoid valve is appropriate and a switching state of a valve body are collected to simplify the structure and to facilitate the assembling operation, thereby enhancing safety and reliability. A solenoid valve having a sensor comprises a solenoid valve 1, a base 2 for supplying and discharging pressurized fluid to and from ports P, A, B, EA and EB of the solenoid valve 1, and an intermediate block 3 disposed between the solenoid valve 1 and the base 2. The intermediate block 3 is provided with communication passages 53, 54A, 54B, 55A and 55B for respectively bringing the ports of the solenoid valve and flow paths of the base into communication with each other. A conduit 56 crossing the communication passages is provided in the intermediate block 3. A pressure introducing port 58 opening at the communication passage 53 whose pressure is to be detected is formed in the conduit.

Abstract: A subsea actuator and method is disclosed that includes all moving components mounted in a compact, concentric configuration. The subsea actuator is highly reliable and will operate at depth even with zero valve body cavity pressure. A preferably cup-shaped spring pusher is provided in telescoping relationship to the hydraulic chamber. A piston position indicator is provided which is connected externally to the hydraulic piston cylinder to avoid the possibility of hydraulic leaks due to the piston indicator. A manual override may be provided with a manual override indicator. The manual override indicator has a shorter travel length than the manual override operating stem to thereby reduce the overall length of the manual override assembly. The driving stem provides a removable connection to the hydraulic piston from the top of the actuator housing and a quick disconnect permits disconnection of the driving stem from the valve stem.

Abstract: An alarm valve system includes a valve body, a valve seat in the valve body with a groove in the sealing face of the seat. A valve element is positioned to seat on the sealing face. A vent extends from the groove in the valve seat to be in communication with a flow alarm and an accumulator alarm. The accumulator alarm includes a cavity with an opening above and a liquid level switch in the cavity. A drain valve is below the cavity.

Abstract: A valve lock for locking a valve spindle in a selected position corresponding to the valve being for example fully open or fully closed. The lock has a housing which is mounted on the valve body and a hub which engages and rotates with the valve spindle relative to the housing. A latch is provided between the housing and the hub, the latch being actuatable by a key to assume a latched condition in which rotation of the hub relative to the housing is permitted in one direction but prevented in the other direction. A spindle position indicator is coupled by a transmission to the hub as to be displaced as a result of rotation of the spindle, thereby to indicate the spindle position relative to the valve body. The spindle position indicator prevents actuation of the latch by the key except when the spindle is in the selected position as represented by the spindle position indicator.

Abstract: To provide a solenoid valve having a sensor in which monitor devices for monitoring whether input or output pressure in the solenoid valve is appropriate and a switching state of a valve body are collected to simplify the structure and to facilitate the assembling operation, thereby enhancing safety and reliability.

Abstract: The present invention aims to permit an easy and reliable predicting of abnormality of a solenoid valve before failure, by detecting operating times of the solenoid valve and discriminating, from the operating times, whether the changeover operation thereof is normal or abnormal.

Abstract: A method for providing an indication and alarm of a possible failure in a fluid control valve stem, plug or seat in a process control system having a microprocessor based valve positioner. The drive pressure, drive signal and valve position feedback are monitored. If greater than a predetermined change in the drive pressure or the valve position feedback is detected, then a second series of detection steps is initiated. In the second detection steps the present set point to process value relationship, such as flow rate or other process variable is compared to a stored test cycle derived set point to process value relationship for the same set point. If there is a process value change, then the operator is alerted as this change may indicate there is a damaged valve stem, plug, or seat problem which needs to be inspected.

Abstract: The invention relates to a device (1) for distributing fluid under pressure, particularly welding gas, comprising at least one body (1′) provided with at least one manometer (3, 3′) comprising a housing (4) and a connection ferrule (2, 2′), said connection ferrule (2, 2′) being inserted in a recess (5, 5′) provided in the body (1′), characterized in that said body (1′) comprises moreover at least one passage (6, 16) communicating with said recess (5, 51), and in that said connection ferrule (2, 2′) comprises at least one recess (7, 71) and in that at least one connection means (8, 18) is inserted in at least one portion of at least one passage (6, 16) of the body (1′) and in at least one portion of at-least one recess (7, 7′) of the connection ferrule (2, 21), so as to permit the solidarization, at least temporarily, of said manometer (3, 3′) on said body (1′).

Abstract: An emergency gas line shut-off system for automatically preventing a flow of gas into a structure during the detection of emergency conditions. The emergency gas line shut-off system includes a gas valve for mounting on a gas supply line. The gas valve is electrically connected to a central control assembly for controlling the gas valve. The central control assembly preferably comprises control circuitry for determining when the gas valve should be in a closed condition for preventing the flow of gas into a structure. The control circuitry is mounted in a housing and is electrically connected to a detector for detecting a condition requiring the closed condition of the gas valve. The detector may comprise, for example, a smoke detector for detecting smoke, a carbon monoxide detector for detecting carbon monoxide or an earthquake detector for detecting earthquakes.

Abstract: A pressure monitoring assembly includes an isolation valve assembly and a differential pressure sensor assembly. The rigid manifold has two pressure inlet ports which each communicate with respective pressure outlet ports through isolation valves. An equalization passage and valve connect the two pressure lines. The pressure sensor assembly is sized to mate directly with the monolithic manifold by having sensor inlet ports that line up with the pressure outlet ports. Pressure tight attachments releasably secure the pressure sensor assembly to the manifold, but a rigid to support the weight of the pressure sensor assembly. No bleeding valves are necessary. Orientation and the positioning and construction of the manifold effectively reduce the amount of heat transfer between the pressure lines and the pressure sensor(s).

Abstract: The present invention relates to faucets of the type used in sinks, lavatories, urinals and the like. Typically these faucets are made from metal or plated plastics and are electrically conductive. A module affixed to the outlet end of the faucet senses temperature or other fluid properties and generates a signal. A valve controller receives the generated signal and positions a control valve accordingly. The generated signal is communicated from the module to the valve controller by passing the signal along the conduit itself.

Abstract: In a position control system for monitoring the position of a valve, a signal transmitter for generating a signal indicative of a valve position includes a shaft coupled to the valve and rotatable to an azimuth angle indicative of the valve position. The signal transmitter includes a signal flag mounted on the shaft in either a calibration state or an operating state. In the calibrating state, a signal-flag adjuster sets the azimuth angle of the signal flag independently of the shaft or of any other signal flags. In the operating state, the signal flag rotates with the shaft.

Abstract: A pressure relief valve monitoring device is provided. The monitoring device includes a sensor input module located proximate to a pressure relief valve, a microcontroller located within the sensor input module, and a real time clock/calendar also located within the sensor input module.

Abstract: A fluid metering valve, for example as shown in FIG. 1, comprises a valve element moveable, axially and angularly, by a drive member, a sensor arranged to monitor the position occupied by a target carried by the drive member, and an adjustment arrangement whereby the axial position of the target can be adjusted relative to the drive member independently of the angular position of the target. A backlash free connection may be provided between the valve element and the drive member, the backlash free connection comprising a projection protruding laterally from one of the drive member and the valve element, the projection being received within a recess associated with the other of the drive member and the valve element, the dimensions of the projection and the recess being such that the projection engages the sides of the recess but is spaced from the base thereof, and biasing means urging the projection towards the base of the recess.

Abstract: The invention relates to a device for distributing a working gas, comprising a series of pipes connected to at least one source of working gas and to at least one outlet pipe for conveying the working gas towards a consumer station, functional members (25, 25A); and a command-control unit (35, 35A) comprising means (37) for communicating with the said functional members (35, 35A), means (39) for controlling tasks relating to the said functional members (25, 25A) and means (45) for operating the control means (39), which can be actuated by an operator of the distribution device. The operating means (45) comprise a touch-sensitive screen (47) which has main control zones associated with the control of corresponding tasks, which main control zones are delimited by graphics associated with the said tasks and displayed permanently on the said touch-sensitive screen (47).

Abstract: A density monitoring assembly for use in monitoring the gas density within a high voltage circuit breaker tank is disclosed. The density monitoring assembly is coupled directly to an exterior surface of said tank and provides electrical signals indicative of the density of gas within the tank. The assembly comprises a cover that encloses the density monitoring device. The device itself is used to retain the cover. A ball valve and a shraeder type valve are provided to allow testing of the device.

Abstract: The temperature regulating device of the instant invention accurately regulates the temperature of a fluid to be sent through a conduit for either warming or cooling an infusate that is to be provided to a patient. The heater/cooler that is used for regulating the temperature of the fluid, and the fluid itself, are continuously monitored by a number of sensors, which provide feedback signals to a processor controller, to ensure that the temperature of the fluid is maintained at a desired temperature. The fluid is circulated by a pump which operation is also continuously monitored. A special connector assembly provides the inlet/outlet connection between the device and the fluid conduit. The connector assembly is constructed such that the system would operate only when the connector of the fluid conduit is correctly mated thereto.

Abstract: A vent assembly for a double case, rotary positive displacement meter permits venting of the outer housing chamber and inner mechanism chamber simultaneously through a single port in the outer housing to prevent damage to the rotor of the inner mechanism. A float/reed switch assembly can be provided to provide an indication of the need for venting if the vent is manually operated, or to automatically vent if an electrically operated valve is used.

Abstract: A single-fluid, multiple-reservoir hydraulic system and a method and system for fluid distribution are provided. The single-fluid, multiple-reservoir hydraulic system utilizes a single-fluid to supply all vehicle power and lubrication fluid requirements. The hydraulic system combines separate fluid reservoirs and fluids into a single integrated system that services multiple systems without a need for multiple dedicated reservoirs. The hydraulic system maintains and prioritizes separate dedicated fluid reserves within one reservoir and may also reach and maintain consistent fluid temperature and viscosity. Consistent performance and extended component life are provided while maintaining circulation with the hydraulic system. In addition, the single fluid and single reservoir hydraulic system have a single fluid fill point, a common reservoir check point and fluid level monitor.

Abstract: The invention provides an in-line low supply pressure alarm device preferably housed together with a gas pressure regulator and a gas flow controller, thereby eliminating the need for the operator to monitor gas availability. The alarm device is designed to be inserted in-line and includes a hollow housing with a gas inlet, a gas outlet, and an elongate internal chamber. A piston is disposed within the chamber for axial sliding between an alarm-on and an alarm-off position. The piston includes a piston head sealed in sliding engagement with an actuating compartment of the chamber. The actuating compartment of the chamber is filled with pressurized gas in flow communication with the gas inlet in operation. The piston includes an axially extending valve stem with a lateral alarm port in flow communication with the gas inlet. The valve stem is in sliding engagement with axially spaced apart seals defining an alarm plenum within the chamber.

Abstract: A valve has an integral flow switch with a passageway provided through the valve member such as a butterfly disk to an inlet of the flow switch. An outlet of the flow switch communicates with the outlet of the valve.

Abstract: A device and method for shutting off the flow of gas to a structure, such as a residence, when a fire is detected in the structure. The device has a fire detector for providing a status signal to indicate the presence of fire in a structure, an actuator in communication with the fire detector, and a shut-off valve located on a gas line and connected to the actuator. When the status signal is received by the actuator, the actuator causes the valve to close, thereby shutting off the flow of gas to the structure. The device also includes one or more of the following: a secondary electric power source, disturbance prevention circuitry, a shut-off valve position indicator, a manually operated means of closing the shut-off valve, and an alarm indicator for indicating the presence of fire in the structure. The method involves detecting a fire and providing a status signal to an actuator. Then the actuator moves the shut-off valve from an open position to a closed position.

Abstract: A valve arrangement includes a variable aperture through which fluid may flow, a closure element adjustable to vary the size of the aperture, and a sensor unit which generates an output signal dependent on the aperture size. The sensor unit has a light detector disposed downstream of the aperture to detect light passed through the aperture and to generate the output signal dependent on the detection of the light. This signal is supplied to a visual display unit having indicators that are respectively activated to show if the valve is open or closed.

Abstract: The invention relates to the maintenance of safety devices. Valves and similar automatic, mechanical safety devices normally maintaining a fixed position are in danger of getting stuck, and consequently may not be fully operable in an emergency situation. In a system according to the invention, real-time data indicating the operability of, for example, a valve actuator, is provided. When a fault is discovered, it can be localized using online diagnostic tools. A standby state is continuously maintained, as the unit for activating the safety function is independent of the unit for monitoring the operability, and the latter is bypassed in an emergency situation.

Abstract: A method and a synthetic danger predicting and disaster preventing monitor system in which waterworks pipelines laid around under the ground or through a structure are employed in their entirety for a synthetic danger predicting alarm sensor to thereby predict a variety of occurable trouble, discover a sign of disastrous incidence early before a great accident results, and locate the place at which trouble occurs so that trouble remedying works are completed before a resultant great accident happens. Both end portions of piping 1 positioned across each of a great number of specific intervals (Nos. 1 to N) set at required portions of water distributing pipelines laid under the ground or through a structure are fitted with synthetic sensors S provided with detector portions for sound, radiation, heat, mechanical strain, electricity, magnetism and vibration.

Abstract: A valve control and monitoring assembly is mounted substantially alongside the upwardly extending auxiliary shaft of a rotary valve actuator, rather than directly above the auxiliary shaft. This valve control and monitoring assembly includes a targeting device and LEDs that provide for immediate visual indication as to the position of the driven valve, and may also include a pneumatic valve for effectuating opening and closing of the driven valve.

Abstract: A method and a valve apparatus for surveying the condition of a control valve. The position of the valve (101) is adjusted by means of an actuator (103) controlled by an electropneumatic positioner (104) and operated by means of pressure medium. The operation of the valve is monitored by sensors (109, 110, 107) that read the readings from the control signal, the input pressure of the positioner, the difference between the input and output pressure of the actuator, and the position of the valve. A fault causing a deviating reading will be located by using the readings given by the sensors and deduction rules stored in the microprocessor of the actuator. In an initial situation, when the valve is in balance state, the readings given by the sensors are stored at least from the control signal, valve position and the difference between the input and output pressure of the actuator. When the operation is continued, the readings given by the sensors are compared with the readings of the initial situation.

Abstract: A Two-way valve for regulating and measuring the flow rate of a fluid through a header (1) and a branched duct (2,2a) inside the header itself. The valve (10a, 10, 11, 11c) which shuts off the aperture (2b) of the branched duct (2) is internally hollow and movable axially by an associated actuator (13). Discs (30, 130) for detecting the pressure exerted by the flow of the fluid are integral with elements (20, 40) movable axially against the opposing action of a spring (60, 160) and form part of an instrument (70, 170) for measuring the flow rate. The valve comprises a head (10a), on the side surface of which recesses (10d) are formed.

Abstract: A distribution device for a circuit operated with a liquid medium for a heating system or a cooling system, such as a hot water heating plant, a solar plant or the like. The distribution device serves to separate the medium into individual circuits each having a distribution pipe for forward and return flow, wherein the distribution pipes are provided with regulating and locking members as well as, if necessary, measuring and indicating members for the individual circuits. The regulating and locking members include members for preadjusting the maximum flow rate and for regulating the respective circuit, wherein the regulating and locking members are each combined in a fitting with only one valve body with flow from the front against the valve body, and wherein the regulating and locking members are exclusively arranged in the return flow pipe.

Abstract: An irrigation control system including an irrigation controller, a portable data shuttle, and a personal computer. The user creates a watering program comprising watering schedules by using a graphical user-friendly interface of the personal computer. The watering program is then downloaded into the portable data shuttle. The portable data shuttle is coupled to an irrigation controller and a first watering schedule is downloaded from the portable data shuttle into the irrigation controller in a matter of seconds. At a later time, the data shuttle automatically downloads a second watering schedule replacing the first schedule, thereby updating the irrigation programming. For example, a new watering schedule may be automatically downloaded at preselected intervals to accommodate the changing seasons. The portable data shuttle includes voltage regulation circuits so that it can receive power from either the personal computer or the irrigation controller.

Abstract: This invention provides a fire-control sprinkler system riser for a residence, including a unitary manifold for porting to system components. The longitudinal manifold has pipe threads on its ends to connect to an inlet water pipe and an outlet sprinkler system; and it has ports all to one side of the manifold for mounting the riser system components in the following order from inlet to outlet: flow switch means; test and drain valve means; pressure gauge means; and relief valve means. On the other side of the manifold are support connections, as for attachment to a beam of the residence. The manifold may be connected facing either way, i.e., left support or right support, and it has indicia on both manifold facing sides for indicating flow direction and port identifications to a user from either side. Dimensions provide high efficiency in use of space, etc.

Abstract: Valve with an actuator which consumes power from an energy source and which comprises a device capable of detecting that the actuator is operating the valve, a first sensor for measuring a value representative of the power consumption from the energy source and an electronic circuit connected to the first sensor and to the device so as to compare the value representing the power consumption from the energy source with a reference value, during operation of the valve by the actuator, and provide information on the basis of this comparison.

Abstract: A hydraulic function-performing unit is described, having a main housing and at least one movable function-performing element, the position and/or movement of which in the main housing determines flow and/or pressure conditions and/or chamber volumes for hydraulic fluid, and having at last one sensor. It is desirable for the construction of such a function-performing unit to be simplified. To that end, the sensor is accommodated inside a sensor housing. The sensor housing and the main housing have adjoining interface faces and there is provided a transmission channel which is led through the interface face and connects a measuring point in the main housing to the sensor.

Abstract: The invention relates to a control apparatus, comprising an actuating drive and an actuator connected therewith, whereby the actuator comprises at least one valve face and a throttle element that works herewith. The throttle element can be moved relative to the valve face by means of an actuating spindle connected with the actuating drive for the execution of a rotational and/or piston motion. The actuating spindle is sealed against the valve interior chamber at a first sealing location. A second sealing location likewise seals the actuating spindle, and, between the two sealing locations. There is a test chamber that is accessible via at least one control terminal, to which chamber a pressure sensor is connected. The pressure sensor is connected with an evaluation unit for monitoring the operation of the control apparatus.

Abstract: A speed controller with scales according to the invention is used to adjust the amount of an air flow thereby to control the amount of a chemical liquid sprayed. The speed controller includes a housing, a controller body and a transparent tube. The controller body is partly inserted in the housing and has a rotary button located at one end thereof and outside the housing. The rotary button has a slot and an indicator thereon, wherein the indicator is located at one end of the slot. The transparent tube, having a vertical scale on the side thereof and a circular scale on the top circumference thereof, encloses the rotary button. In the invention, the position of the rotary button can be determined by reading the vertical scale and the circular scale so as to precisely control the amount of a chemical liquid sprayed, thereby increasing yield and improving engineering analysis.

Abstract: A valve assembly includes a base (10), a handle (18) and a spindle (14) connected to the handle (18) at one end and adapted at the opposite end for opening and closing the valve. The spindle (14) extends from the base (10) to the handle (18) and is adapted such that rotation thereof results in opening and closing of the valve respectively. The base (10) is provided with two or more first indication means (R,B,G) and the handle is provided with two or more second indication means (20,21,22;RR,BB,GG). At least one of the indication means on either or both of the base (10) and handle (18) is independently positionable on the base (10) or handle (18) relative to the other indication means and is alignable with a corresponding indication means on the handle or base respectively such that two or more respective predetermined degrees of rotation of the handle can be recorded.

Abstract: A method and apparatus for metering building structures having a plurality of service outlets each having control valves, includes the installing of meters within a given distance from each one of the valves. A transmission system is coupled electrically to each one of the meters for sending meter readings periodically to a remotely located equipment.

Abstract: A position indication for an actuator of a rotary valve has a rotor of one color mountable on the shaft of the actuator and a stator of contrasting color, each with a plurality of volutes in one-to-one correspondence. The rotor volutes are hidden behind corresponding stator volutes to indicate a closed disposition and extend beyond their corresponding stator volutes to indicate an open disposition of the valve actuator when viewed from a radial direction. Web members on the rotor are rotated into and out of registration with windows in the base and cover of the stator for indicating valve disposition from above. The rotor and stator are congruent to permit the indicator to be inverted depending on the direction of rotation of the valve actuator shaft during opening and closing of the valve.

Abstract: A control apparatus for a liquid medium including a body portion provided with flow channels. The body portion includes an inlet for the medium, an outlet for the medium to an apparatus that the medium is conducted to, a return point for the medium returning from the apparatus, and a discharge point through which the medium is discharged from the control apparatus. A flow control valve and flow and pressure measuring devices are arranged after the medium inlet in the flow channels of the body portion. A pressure control valve for controlling the pressure in the flow channels between the flow control valve and the pressure control valve is arranged after the return point. For safety reasons, a pressure relief valve is arranged in the channel system of the body portion provided by the flow channels between the flow control valve and the pressure control valve, the relief valve being arranged to open as the pressure exceeds a certain allowed value.

Abstract: A damper device for use with an air duct provides a paddle positioned within the air duct and an axle extending to one side of the paddle, through the duct wall and insulation to a position for manual adjustment of the position of the paddle within the duct. A bushing holds the axle in place, the bushing being tightened against the wall of the duct by a hand nut. The hand nut provides a brightly colored flag that is extendable when the damper device is in place. An O-ring is used to cause a frictional relationship between the paddle axle and the bushing so that the paddle is fixed into place once adjusted. A contour step on the bushing face allows engagement between the paddle and the bushing so as to hold the bushing from rotating while the hand nut is threaded into place on the bushing.

Abstract: The height of the valve with a flow meter shall be as small as possible, enabling it to be mounted in restricted spaces. In order to achieve this, all adjusting and display movements are not executed axial but on the contrary polar. The rotating spindle of the valve is designed as rotary slide valve and the display marker or the graduation of the display unit of the flow rate meter is present on a rotating bush. The total height of the valve with a flow meter is accordingly low and unchangeable.

Abstract: A system for monitoring the use of heat energy in water devices in an individual unit of a multi-unit complex wherein the multi-unit building is supplied water from a common source and the individual unit has a plurality of energy consuming water devices each supplied by supply and return water pipes supplied from said common source. The system comprises a monitor for monitoring the flow through each of the water pipes which will determine that successive volumetric flow units have flowed through the pipe, define the heat energy of each of the successive volumetric flow units, and compute a total heat energy removed from the successive volumetric flow units, and periodically transmits the total heat energy consumed from the successive volumetric flow units, and a remote receiver which receives the total heat energy transmitted from each of the plurality of monitors and computes a total heat energy use for the individual unit for a selected period of time.

Abstract: An apparatus selectively supplies a source of pressurized fluid to a load device and selectively exhausts pressurized fluid from the load device. The apparatus includes a first housing for defining a longitudinally extending aperture communicating through first, second, and third passages with spaced first, second and third external surface portions of the first housing. A valve spool is engageable within the first aperture for longitudinal movement between a first position communicating the second passage with the third passage and a second position communicating the first passage with the second passage. The valve spool is normally biased toward the first position. Modular port members are connectable to the first, second and third spaced external surface portions for connecting the first passage to a source of pressurized fluid, the second passage to the load device, and the third passage to an exhaust port.

Abstract: A switch mounting arrangement enables close monitoring of seat position in a single-axis double-seat valve. The switch mounting arrangement includes a switch element disposed within a longitudinal bore of a mounting block. The bore also houses a transducer element that is adjustable within the bore to permit relative placement between the switch element and the transducer element so that very slight movement of the switch element and corresponding movement of the valve seat may be detected. This arrangement may then be incorporated into a monitoring circuit and/or control system.

Abstract: An apparatus for measuring and dispensing solid dry flowable materials, comprising a refill container, hopper, dispensing valve, transfer container, load cell and controller. The refill container and the transfer container are each mechanically and/or electronically keyed to a specific product.

Abstract: A multi-orifice plate carrier for use in a modified orifice fitting and a differential pressure-operated, mechanical valve and piston system for vertically and horizontally adjusting the multi-orifice plate carrier to facilitate recordation of various line pressures on an appropriate recording meter. In a preferred embodiment two or more pressure recording meters are fitted with corresponding meter valves and a common pressure selector valve, along with a spring-loaded or fluid-operated plate piston connected to the multi-orifice plate carrier and a horizontal adjusting bar engaging the plate piston rod, to facilitate vertical adjustment of the multi-orifice plate carrier, horizontal shifting of the orifice plate carrier and resulting alignment of an orifice of selected diameter in the line bore of the orifice and reading of a corresponding recording meter responsive to automatic operation of the pressure selector valve and meter valves.

Abstract: An electronic gas regulator is connected to a gas cylinder or other vessel to automatically measure and control the flow of gas to a desired application. Control and set up is accomplished through microprocessor based electronics, switches, sensors, encoders, indicators and electronic numeric display. Sensors, microprocessors and other electronics are thus provided in a single common apparatus to monitor and accurately dispense gas for a predetermined operation.

Abstract: An indicator for a pilot, particularly a two-line pilot to visually indicate whether a pilot has responded to a pressure condition within a flowline which pressure condition is outside a predetermined range. The visual indication also indicates whether the pressure condition is above or below the predetermined range.

Abstract: A system for detecting leakage and unwanted flow in a fluid supply within a building capable of detecting small leaks and shutting off flow when such occur. The system may be operated in a continuous mode or on a timed mode, and the system allows flow for a preset small time period before the shut-off is initiated. The system includes an inflow sensor, a discharge sensor and valve means to seal the supply conduit in the event of unwanted fluid flow or backflow in the discharge conduit. The system is extremely sensitive due to the provision of a by-pass conduit around a check-valve in the supply conduit, where the flow sensor is positioned in the by-pass conduit, such that small volume water flow must pass through the flow sensor.

Abstract: A valve for a measuring device for the measurement of the physical properties of a fluid in a pipe line has a housing with two coaxial openings for the passage phased in the pipe line. In the housing a valve closure ball is rotatably mounted about a transverse axis. The valve closure ball has a flow channel which, in a first rotary angle position connects to the two openings. In a second rotary angle position turned through about 90.degree. with respect to the first, the valve closure ball blocks the flow between the openings. The piece has a circumferential surface forming a part of a spherical surface, which cooperates with a corresponding valve seating surface on the inside of the valve housing in the manner of a ball valve. In a housing bore coaxial to the axis of rotation of the valve closure ball, which communicates with the flow channel, a sensor is sealingly mounted.