Abstract: The present invention discloses a valve structure with a built-in valve seat of a pre-action warning valve, including: a valve body, a valve cap, a valve seat, and a membrane clack. The pre-action warning valve provided in the present invention has the advantages of being simple, reliable, and low in manufacturing costs.

Abstract: Systems and apparatuses include a solenoid valve including a first coil, a second coil coupled to the first coil, a banjo fitting coupled to the second coil, a spool housing coupled to the banjo fitting so that the first coil and the second coil are selectively rotatable about the spool housing, a spool received within the spool housing, and an armature received within the first coil and the second coil and including a spool actuator coupled to the spool.

Abstract: An open/closed display handle for rotating a spindle of an open/closed valve mechanism of a valve device includes a handle main body having a handle-side gear that rotates about an axis of the spindle, a rotary display body having an open/closed display portion that displays an open/closed valve state and a display body-side gear, and a rotary fixed body that pivotally supports planetary gears. The planetary gears, the handle-side gear, and the display body-side gear form a differential rotation mechanism, and a visual recognition restricting body that covers the rotary display body and has openings that open to allow a portion to be displayed of the open/closed display portion to be visually recognized from an outside and a transparent cover body that covers an entire outer side of the visual recognition restricting body and is translucent to allow visual recognition from an outer side form the handle main body.

Abstract: A flow selector having features for controlling the flow rate of a fluid over a continuous range of flow rates is provided. In particular, a flow selector including a flow rate selection mechanism is provided, where the flow rate selection mechanism provides more precise control of the fluid flow rate. A flow selector comprising a needle valve for controlling the flow rate of a fluid over a continuous range of flow rates also is provided.

Abstract: A visual position indicator assembly for limit switch boxes is provided. The indicator assembly has an indicator element configured to be fitted to a shaft of a driving assembly of a limit switch box, and the indicator element has a plurality of adjacent sectors featuring different colors and/or writings. The visual position indicator assembly further has a first mask and a second mask that are both provided with through apertures having the same size and arrangement and that are fitted coaxially to each other. One between the first mask and the second mask is rotatable with respect to the other one. Thanks to this configuration, it is possible to vary the angular width of the through apertures in order to adapt it to the real angular stroke of the indicator element.

Abstract: The present invention includes: an inspection table configured to support a three-way valve device in such a state that a first opening and a second opening are sealed by a sealing member; a communication hole provided through the inspection table and configured to hermetically communicate with a third opening in a state wherein the three-way valve device is supported by the inspection table; an enclosure configured to cover the three-way valve device to form a sealed space except for the communication part; a helium-gas supply path for supplying a helium gas into the three-way valve device via the communication part and the third opening; a leak tester device configured to determine whether or not there is a leakage of the helium gas into the sealed space; and a helium-gas suction discharge path for suctioning and discharging the helium gas supplied via the third opening and the communication part.

Abstract: A valve position indicator for a valve includes an outer housing, actuation rod, indicator flag, and follower. The actuation rod is positioned within the outer housing, which is couplable to a tail stem protector of the valve. The actuation rod may have a helical slot formed therein. The actuation rod may be rotatably coupled to the outer housing. The indicator flag may be coupled to the actuator rod and may extend radially therefrom. The follower may be couplable to a tail stem of the valve. The follower may extend in a direction perpendicular to the extent of the tail stem. The follower may extend through a slot in the tail stem protector and into the helical slot of the actuation rod when the valve position indicator is coupled to the tail stem protector.

Abstract: Provided is a fluid control device that can have a small size, while a member for detecting abnormality of the fluid control device is incorporated. In addition, a result of detecting an abnormality of the fluid control device is made easily recognizable from the outside. A fluid control device 1 includes an information processing module 5 provided in the device, a valve body 11 having a flow path, an actuator body 12 fixed to the valve body 11, a hollow casing 13 that is fixed to the actuator body 12 and has a side surface on which a through hole 133d is formed, a piston 126 that is provided in the actuator body 12 and in which a driving pressure introduction path 126b that communicates with a driving pressure introduction chamber S2 is formed, and an introduction pipe 21 through which driving pressure is introduced, the introduction pipe 21 having one end inserted to the driving pressure introduction path 126b and another end leading to an outside through the through hole 133d of the casing 13.

Abstract: A wrench for securing, actuating and preventing tampering with a fire hydrant is disclosed. In useful embodiments, the wrench can be a two-ended wrench having a loop that encloses a pentagonal opening at either end of an elongated handle, where the handle can include in a nonterminal portion a slot. In a locking mode, the wrench can accept at a first end an actuating nut of the fire hydrant and can be locked in place by inserting a locking arm of a padlock through an eye bolt that is secured to a side of the fire hydrant and inserted through the slot. The wrench can be unlocked and removed, whereupon a second end can be used to turn the actuating nut as well as to remove water outlet caps and adjust nozzles.

Abstract: A device for indicating the status of a valve includes a position indicator, wherein the position indicator includes a monitoring element, and a communication element. A method for indicating the status of at least one valve includes monitoring positions of a device enclosed by a first valve with a position indicator and communicating the positions of the device enclosed by the first valve with a communications element.

Abstract: A valve position indicator for a valve includes a spline barrel, indicator flag, and follower. The spline barrel may be generally tubular and may be positionable about a tail stem protector of the valve. The spline barrel may have a helical slot formed therein. The spline barrel may be rotatably coupled to the tail stem protector of a valve. The indicator flag may be coupled to the spline barrel and may extend radially therefrom. The follower may be coupleable to a tail stem of the valve. The follower may extend in a direction perpendicular to the extent of the tail stem. The follower may extend through a slot in the tail stem protector and the helical slot of the spline barrel when the spline barrel is positioned about the tail stem protector.

Abstract: Valve for a pressurized fluid cylinder, comprising a sensor for sensing the position of the control member, said sensor being configured to generate an electric signal indicative of the position or of the fluid flow rate and/or pressure set by a regulating member for regulating flow rate/pressure, the sensor (9) for sensing the position of the control member comprising a conductive circuit having a given electrical resistance, a member for measuring an electric variable of the conductive circuit and a wiper, the conductive circuit and the wiper being movable relative to one another during the movement of the control member with respect to the body of the valve into different configurations in which the wiper modifies the shape and/or area of the conductive circuit measured by the measuring member.

Abstract: A technique facilitates continued operation of a position indicator which may be used with a valve or other types of actuatable components. The technique utilizes a housing and a stem driver mounted for rotation within the housing to actuate the valve/component to a desired position. The stem driver has a threaded region which is threadably engaged with a clutch collar located in the housing. When the stem driver is rotated relative to the clutch collar, the clutch collar moves in an axial direction along the interior of the housing. The clutch collar is coupled with a bracket which moves during axial translation of the clutch collar. The clutch collar comprises a flexible portion which enables slippage of threads at the region of coupling between the clutch collar and the stem driver if movement of the bracket becomes sufficiently restricted.

Abstract: The invention is directed to an indicator (22) of the opening and/or closing status of a device controlling the flow of a fluid, such as a tap or a pressure reducer for compressed gas, comprising a sleeve-shaped support (24) to rotatably engage with a protruding portion (18) of a body of the device and from which an actuating spindle (20) extends along a longitudinal axis of said device; an indicator sleeve (26) axially sliding along the support (24); a rotor (28) to be fixed to the spindle (20) and comprising at its periphery a least one track (32) with a curved profile; and at least one track follower (30) extending radially from the indicator sleeve (26) through a longitudinal slot (242) in the support (24) and engaging with the at least one track (32).

Abstract: A flush valve assembly has a pilot valve and a drive train for selective driving the pilot valve between an open position and a closed position. The drive train has a drive gear coupled to a motor for rotating the drive gear and a valve gear coupled to the pilot valve and intermeshing with the drive gear. At least one of the drive gear and the valve gear have a flag extending outwardly therefrom. A sensor positioned to detect the flag and establish a rotational position of the drive gear and the valve gear to thereby establish an opened or closed position of the pilot valve.

Abstract: A valve actuator is described that comprises a piston movable within a cylinder, an indicator pin support member movable with the piston, and an indicator pin attached to the support member and extending through an opening provided in a housing, wherein the indicator pin includes an attachment region held captive to the support member, the attachment region extending through an arcuate slot formed in the support member. Also described is a valve incorporating such an actuator.

Abstract: A spring force indicator for a door closure having a spring force adjuster comprises a drive wheel coupled to the spring force adjuster for rotation therewith and a driven wheel. The driven wheel includes a disc and a post extending from the disc, the post being disposed in a bore formed in a front surface of the door closure and adapted to engage the drive wheel for rotation therewith. A cover being disposed on the end of the door closure and configured to cover the drive wheel and the driven wheel. The cover includes a sidewall, a central aperture for receiving the spring force adjuster, a second aperture disposed between the central aperture and the sidewall, and second indicia disposed around the second aperture. The disc includes first indicia visible through the second aperture which cooperates with the second indicia to indicate a measure of spring force.

Abstract: The invention relates to an improved three-way valve structure consisting of a main three-way valve body (1) with inlet (2) and outlet channels (3, 4) that communicate internally by means of an inner obturator element (5) actuated by a key (27), characterized by the relative position of the outlet channels which are perpendicularly arranged in relation to each other and in the same plane perpendicular to the inlet channel, the exterior form of the obturator (5) being a surrounding cylindrical shape and provided with, in the upper part thereof, flanges (9) for the seating of the same and sealing joints (12, 13), ending in a projecting rod (15) with a key seat shape that can fit into the key (27) of the valve. The key enables four functional positions by means of a quarter-circle turn: both outlets open, one outlet open and another closed and both outlets closed.

Abstract: This invention relates to a control element, for example a control element for a temperature controller and/or steam controller. The control element has a dial (11) with an opening (18) and a graphic plate (12) is located behind the dial (11). The graphic plate has a marking (19) which is at least partially aligned with the opening so that it is visible therethrough when the dial (11) is rotated relative to the graphic plate (12) within a first angular range.

Abstract: A valve positioning system controls a valve and exchanges information related to the valve. The valve positioning system includes a valve positioner in operative association with the valve such that the valve positioner receives status information related to the valve. The valve positioner includes one or more lights that are selectively illuminated in a predetermined order based on the status information. By selectively illuminating the one or more lights in the predetermined order, the valve positioner is optically transmits the status information to a computing device that is in a line of sight with the one or more lights of the valve positioner. A method of exchanging information related to a valve in a valve positioning system is also provided.

Abstract: Device for actuating a diaphragm valve, comprising a housing, wherein the housing is preferably formed of a top and bottom part, and further comprising an electric motor, a base board for the fastening of electrical components, a gear unit for actuating the diaphragm valve or the spindle nut of the diaphragm valve, and a position indicator for indicating the degree of opening of the diaphragm valve, wherein the position indicator is driven via the gear unit.

Abstract: A control valve (1) with a valve housing (13) through which a flow channel (14) runs with a flow cross section changeable by a closure unit consisting of a valve seat and a valve cone which is adjustable relative to the valve seat. An adjusting device has a sliding unit (2) with a sliding rod (21) adjusting the valve cone over an adjustment path and a drive device acting on the sliding rod and controlled by a controller. The controller has a measuring unit (4) which detects the adjustment path via a transmission unit. The transmission unit is provided with an adapter unit (3) comprising a replaceable structural unit, between the sliding unit (2) and the measuring unit (4), said adapter unit converting the adjustment stroke into a measurement stroke specified by the measuring unit (4) in a manner corresponding to a transmission ratio specified by the adapter unit.

Abstract: A ball valve is provided. The ball valve includes at least one load varying mechanism provided in the static body assembly. The load varying mechanism includes a biasing member pressing one of the ball seat seals against the outer surface of the ball of the ball valve with a variable sealing load force applied on the ball, toward the ball and coaxial with the direction of the fluid. The load varying mechanism also includes a movable member operatively connected to a cam and to the biasing member, a rotation of the cam translating the movable member coaxially to the direction of the fluid, in order to variably load the biasing member toward or away from the ball, based on the different positions of the ball.

Abstract: A valve position indicator/method comprising a main rotation axle operably connected with a valve. Repositioning the valve provides rotation of the main axle with a main axle disc with at least one tooth for cooperation with a gear wheel. The main axle disc has a toothless portion substantially not interfering with the gear wheel. The at least one tooth provides a rotation of the gear wheel and the toothless portion provides no rotation of the gear wheel upon rotation of the main axle disc. The gear wheel is on a secondary axle with an indication means.

Abstract: A position indicator for a subsea component of a well system includes a visual indicator including an illuminator, an electrical connector selectably connected between the visual indicator and a power supply, and an actuator configured to connect the visual indicator with the power supply when a moveable member of the subsea component is disposed in a first position, wherein the illuminator is configured to emit a first subsea illumination when the moveable member is disposed in the first position.

Abstract: A system may include a controller that may control operations of a device according to a control loop and characterize a frequency response of the device while the device is operating. The controller may characterize the frequency response by adding a perturbation signal to any signal in the control loop. The controller may then determine a first transformed signal by performing a first discrete Fourier transform on a first signal in the control loop at a frequency of the perturbation signal and determine a second transformed signal by performing a second discrete Fourier transform on a second signal in the control loop at the frequency of the perturbation signal. The controller may then determine the frequency response at the frequency by comparing a first amplitude and a first phase of the first transformed signal to a second amplitude and a second phase of the second transformed signal.

Abstract: A cross-wall indicator post is provided to control through a wall, open and closed configurations of a piping system control valve having a manual actuator with a valve-hand wheel. The indicator post includes a post body having a mounting flange to mount the post body to a wall separating the post body from the control valve. An operating stem extends through the post body and is adjustably, slidably, non-rotatably, telescopingly engaged with an extension rod. A post-hand wheel is engaged with the operating stem for rotation thereof. An engagement member is fixedly attached to the extension rod, configured to be selectively, mechanically engageable with, and releasable from, the valve-hand wheel to actuate the control valve between the open and closed configurations thereof. Rotation of the post-hand wheel rotates the operating stem, the extension rod, and the engagement member, to, in turn, rotate the valve-hand wheel.

Abstract: A click knob assembly that has a fixture having a circular inner surface defining uniformly spaced ridges separated by grooves and a knob, set in the fixture, and including a user accessible portion; a spring holder, attached to the user accessible portion; a spring assembly, engaged to the spring holder; and a first plunger and a second plunger engaged to the spring holder, each facing the circular inner surface, in opposed direction to each other, and each being pushed outwardly by the spring assembly, and thereby being pressed into the circular inner surface. The first plunger includes a click surface sized and positioned to engage the uniformly spaced grooves. When the knob is rotated, the click surface is pushed over a ridge, and then falls into a groove, making a click sound and both the plungers are maintained in contact to the circular inner surface by the spring assembly.

Abstract: A valve positioning system for controlling a valve and exchanging information related to the valve is provided. The valve positioning system includes a valve positioner in operative association with the valve such that the valve positioner receives status information related to the valve. The valve positioner includes a graphical display that displays a graphical representation based on the status information. By displaying the graphical representation, the valve positioner optically transmits the status information to a computing device that is in a line of sight with the graphical display of the valve positioner.

Abstract: One or more embodiments are directed to a magnet configured to be coupled to an object under test, an array of sensors configured to measure a magnetic field associated with the magnet, and a circuit configured to obtain voltage readings based on the measured magnetic field from the array of sensors and compute a distance between the array of sensors and the magnet based on the obtained voltage readings.

Abstract: Described herein is an improved ball valve assembly for use in a tank or a tank-like container. This improved ball valve assembly prevents leakage of a liquid with corrosive and abrasive contaminants within the tank or a tank like container. This improved ball valve assembly is especially useful in a railroad tank car that contains a liquid commodity in whenever a tank is mobile and subjected to wide temperature variations. The improved ball valve assembly contains a ball component made of a ceramic material. A ceramic wiper (i) mechanically seals against the ball component and (ii) prevents contaminants from embedding within, or otherwise abrading, top and bottom seats within the ball valve assembly. Also contained in the preferred embodiment of this invention is an improved drive coupling that (i) eliminates the previously existing need for custom square drive tool (ii) pre-attached to the ball valve assembly.

Abstract: A process, system, and component configuration are described that discourages customer acceptance/use of will-fit, reconditioned, and counterfeit product components, by determining whether or not a serviceable product component is genuine. If a component is determined to not be genuine, then appropriate action may be taken to warn operators and document such findings. For example, one or more markers are disposed or otherwise put on the subject serviceable product component and serves as a targeted feature, and/or a particular characteristic of the filter itself is identified as the targeted feature. A sensor is used to detect the targeted feature and obtain information unique to the serviceable product component. The targeted feature(s) identifies the particular serviceable component as genuine and forms the basis for determining whether a genuine component has been installed. In some circumstances, a fluid filter product is the component that is the subject detection.

Abstract: A method of inspecting switching time with fluid control valve used for inspecting operating time to turn-on or turn-off a valve door of a fluid control valve is disclosed. The method comprises following steps: firstly provide an inspector with a counting unit, a timer, a first limited switch and a second limited switch. The counting unit electrically connects to the timer and a pneumatic module of fluid control valve, the first limited switch and second limited switch connect to the timer, and the first limited switch contacts the rod of the fluid control valve rod. Then, input basic data of corresponding fluid control valve, which comprises operating conditions of the fluid control valve. Next, activate the pneumatic module and start to time, and the axial shift generated by the rod of the fluid control valve triggers the second limited switch to stop timing. Lastly, record and display operating time.

Abstract: An indicator post has a head assembly for use with an underground post indicator valve or a wall mounted post indicator valve. The head assembly includes an upper body having a removable cap rotatably supporting an operating stem coupled to an operating rod for engaging the valve. A leading bogie assembly is threadably mated to a threaded sleeve of the operating stem and includes open and shut targets slideably supported on the bogie assembly to allow adjustment of the targets for valves that open and shut with different numbers of revolutions.

Abstract: Described herein is an improved ball valve assembly for use in a tank or a tank-like container. This improved ball valve assembly prevents leakage of a liquid with corrosive and abrasive contaminants within the tank or a tank like container. This improved ball valve assembly is especially useful in a railroad tank car that contains a liquid commodity in whenever a tank is mobile and subjected to wide temperature variations. The improved ball valve assembly contains a ball component made of a ceramic material. A ceramic wiper (i) mechanically seals against the ball component and (ii) prevents contaminants from embedding within, or otherwise abrading, top and bottom seats within the ball valve assembly. Also contained in the preferred embodiment of this invention is an improved drive coupling that (i) eliminates the previously existing need for custom square drive tool (ii) pre-attached to the ball valve assembly.

Abstract: The invention relates to a hand valve with a valve main body and a spindle movably arranged therein in at least in one actuating direction which can be adjusted for actuating the hand valve by means of a hand wheel arranged on the spindle in its position relative to the valve main body together with the hand wheel. The hand valve has a stroke limitation for the spindle with a stopper element which is adjustable in its position with respect to the valve main body. The invention is characterized in that the stroke limitation has a holding device for the stopper element which is held rotatable with the hand wheel, but fixed in its position to the valve main body in the actuating direction of the spindle at the valve main body.

Abstract: Proposed is a method for monitoring a passive pressure limiting valve (11) via which fuel is discharged from the rail (6) of a common rail system into the fuel tank (2), in which method, upon the detection of a defective rail pressure sensor (9), a switch is made from a rail pressure regulation mode into an emergency mode, wherein in the emergency mode, the rail pressure is successively increased until the pressure limiting valve (11) reacts, in which method, in the emergency mode, the pressure limiting valve (11) is set as open when the starting phase of the internal combustion engine has additionally been detected as having ended, and in which method, in addition, the opening duration of the pressure limiting valve (11) is monitored.

Abstract: A handwheel (30) for hydraulic valve provided with numerical indicator of the valve opening level, comprising a base-body (32) or fixed element apt to be stably restrained with respect to the valve-body and supporting a mobile element (34) rotatably coaxial with respect to said base-body (32), connected with a member of maneuver of the valve and provided with a knob (46) apt to be gripped by a user in order to impart a rotation to said maneuver member corresponding to the value or degree of opening required for the valve indicated by figures (50) displayed through an opening or window (48) of said knob, said base-body (32) and mobile element (34) rotatably co-operating one with the other by means of a kinematic continuous coupling with double parallel internal gear.

Abstract: A control valve for controlling liquid flow in a heating and/or cooling installation. The control valve includes differential pressure regulating facilities and flow area regulating facilities. The control valve is provided with means for manually presetting a maximum flow through area and with means for automatically adjusting the flow through area within the preset maximum.

Abstract: Flow control and indicator assemblies are detailed. The assemblies are especially (although not necessarily exclusively) useful in allowing fluid to bypass automatic pool cleaners (APCs) and may serve as adaptors between APCs and adjacent hoses. The assemblies additionally may provide information about flow rates relative to a desired threshold, for example.

Abstract: A subsea valve actuator is disclosed, comprising an override shaft (6) reaching from inside a fluid filled and pressure compensated actuator housing (1) to the exterior thereof via a bearing and sealing arrangement (7), wherein a visual valve position indicator (14) is arranged exterior to the actuator housing. The visual indicator (14) is pivotally mounted to the override shaft and guided non-rotatably to be forced in axial displacement on the override shaft when the override shaft is rotated, wherein the mounting of the visual indicator (14) on the override shaft (6) is encased in a fluid filled, pressure compensated indicator mounting enclosure (19) surrounding the override shaft (6) in sealing (26) relation outside of the actuator housing (1).

Abstract: Remotely readable valve position indicators and related methods are described. An example apparatus in accordance with the teachings of this disclosure includes a valve body, a valve stem and a fluid flow control apparatus coupled to the valve stem. The fluid flow control apparatus is longitudinally displaceable between a first position and a second position to control fluid flow through a flow aperture of the valve body. The apparatus also includes a valve position indicator including an identifier device coupled to the valve stem. In the first position, the wireless identifier device associated with a first value indicative of the first position of the fluid flow control apparatus. In the second position, the wireless identifier device associated with a second value indicative of the second position of the fluid flow control apparatus.

Abstract: The present invention includes pressure event indicators that identify specific pressurized vessels or pipes from which a pressurized fluid has been exhausted, closed pressurized systems that implement such pressure event indicators, and methods of using such pressure event indicators. Embodiments of such pressure event indicators may include a housing having a substantially horizontal elongate passage, a rotatable axle orthogonally passing through the passage, a paddle fixedly attached to the axle having a closed position, an open position, and a shape that is complementary to a portion of the passage and that occludes a portion of the passage when the paddle is in the closed position, and at least one visual indicator outside of the housing and fixedly attached to the axle, where the purpose of the visual indicator is to identify a position of the paddle to an observer.

Abstract: A valve position indicator assembly is disclosed herein. The valve position indicator assembly includes a gearing assembly operable to transmit an input rotation to an output rotation. The gearing assembly includes a first gearing member driven to the output rotation by the input rotation. A rate of the output rotation is a fraction of and less than a rate of the input rotation. The valve position indicator assembly also includes a position indicia engaged with the first gearing member such that the indicia and the first gearing member jointly move together. The valve position indicator assembly also includes a scale plate including a plurality of graduated indicia defining a scale of rotation movement of the first gearing member. The scale plate is disposed proximate to the first gearing member such that the position indicia passes across the scale of the scale plate during the output rotation.

Abstract: An indicator post has a head assembly for use with an underground post indicator valve or a wall mounted post indicator valve. The head assembly includes an upper body having a removable cap rotatably supporting an operating stem coupled to an operating rod for engaging the valve. A leading bogie assembly threadably mated to a threaded sleeve of the operating stem and includes open and shut targets slideably supported on the bogie assembly to allow adjustment of the targets for valves that open and shut with different numbers of revolutions.

Abstract: A valve actuator assembly includes a rotatable member carrying an extendable indicator arm. The extendable indicator arm may be moveable between a retracted position and an extended position. When the extendable indicator arm is in the extended position, the extendable indicator arm may extend laterally past side walls of the actuator housing of the valve actuator assembly, such that the extendable indicator arm is visible from a location below the valve actuator assembly.

Abstract: A valve position indicator assembly is disclosed herein. The valve position indicator assembly includes a gearing assembly operable to transmit an input rotation to an output rotation. The gearing assembly includes a first gearing member driven to the output rotation by the input rotation. A rate of the output rotation is a fraction of and less than a rate of the input rotation. The valve position indicator assembly also includes a position indicia engaged with the first gearing member such that the indicia and the first gearing member jointly move together. The valve position indicator assembly also includes a scale plate including a plurality of graduated indicia defining a scale of rotation movement of the first gearing member. The scale plate is disposed proximate to the first gearing member such that the position indicia passes across the scale of the scale plate during the output rotation.

Abstract: Embodiments of a method of operating a safety valve and a safety valve system are provided. The valve system includes a valve, an actuator, a mechanical override, and an indicator. The actuator includes a fail-safe mechanism and the indicator is configured to indicate whether the fail-safe mechanism is operable during use of at least one of the actuator and the mechanical override. In one embodiment, a method of operating the safety valve includes actuating the valve into an open position and sending a signal to indicate that the fail-safe mechanism is operable to move the valve to the closed position, while the valve is in the open position.

Abstract: Electronic control system for a submarine actuator, said actuator comprising a container body, from which a drive shaft projects that is suitable for inserting in a seat of said submarine device. The system comprises an electronic control board for at least one electric motor arranged inside said container body suitable for moving said drive shaft.

Abstract: A rotary valve position indicator utilizes a magnet keyed to a shaft, and a magnetic field sensor mounted beside the magnet, to indicate the angular position of the shaft. A magnetic pole sensor detects the initial polarity of the magnet during setup to determine how to correlate the output readings of the magnetic field sensor with the position of the valve. The sensors are located so they permit the shaft to extend through to a mechanical visual indicator.