Abstract: A valve control device for a processing valve includes control electronics for controlling a drive and a measuring system for determining the position of an element movable within the valve control device along a straight direction of movement. The measuring system includes a transmission arrangement for transmitting an excitation wave, a resonator secured to the movable element and in which a resonant electric vibration is generated by the excitation wave, a receiving arrangement in which a signal is generated by a resonant wave generated by the resonant electric vibration, and measuring electronics connected to the transmission arrangement and the receiving arrangement. The measuring electronics generate the excitation wave in the transmission arrangement and determine the position of the movable element relative to the receiving arrangement from the signal of the receiving arrangement. A processing valve improved by the valve control device is also described.

Abstract: An object of the present invention is to provide a thermal airflow sensor with high detection accuracy. In achieving the above object, this invention provides a thermal flow sensor including: a flow rate detection element that has a diaphragm formed by processing a semiconductor substrate, a heating resistor provided on the diaphragm, and resistance temperature detectors installed upstream and downstream of the heating resistor; and a support member that adhesively holds the flow rate detection element with a sheet adhesive interposed therebetween. The support member includes a communicating hole of which one end has an opening to a cavity provided on the back side of the diaphragm. The sheet adhesive has a ventilating hole formed in an opening area of the communicating hole in the support member.

Abstract: Valves having a sprung gate of various constructions are disclosed. In one embodiment, the sprung gate includes a first endless elastic band having an inner perimeter defining an open space sandwiched between a first gate member and a second gate member that each define an opening therethrough in an open position portion thereof. The first endless elastic band is sandwiched therebetween with its open space oriented for alignment with the opening in both of the first and second gate members, which are aligned with one another to form a passage through the sprung gate. In one aspect, the first endless elastic band in positioned inward a distance from the outer sides of the first and second gate members and spaces the first gate member a distance apart from the second gate member thereby defining a channel having a bottom defined by the first endless elastic band.

Abstract: Some aspects of the present disclosure relate to a sensor probe kit that has an electrical connection that ensures a sensor probe has been properly positioned in a boiler well. In some embodiments, the sensor probe kit has a seating mechanism that positively positions a sensor probe at a predetermined position within a boiler well. In many instances, the seating mechanism provides tactile feedback to an installer when the sensor probe is properly positioned within the boiler well. These features can help ensure the sensor probe is properly installed, and helps keep the sensor probe electrically connected to the well at all times after installation.

Abstract: A smart lower end system that can detect multiple events and failures during the generation of pressure pulses by a pulser is disclosed. Pulser failures may occur if the pilot valve fails to fully close or open, if the signal shaft fails to move and close pilot valve orifice, or if movement of the pilot valve or signal shaft is restricted. The components of the smart lower end system may cycle between sleep and wake states to allow for low power operation.

Abstract: A fuel injector includes fixed metal components, in particular an injector body, a solenoid actuator equipped with a retaining spring that holds a control valve stem, a control valve body including a seat for the control valve stem, a spacer between the body of the control valve and an injection nozzle, a control chamber, and an injection needle seat. The fuel injector also includes movable metal components, in particular the control valve stem and an armature thereof and an injection needle. Surfaces of the metal components that are in contact with one another are contact surfaces. Resistive surface coatings are arranged on a number of the contact surfaces. The overall electrical resistivity of the injector between the body of the solenoid actuator and the body of the injector varies by at least three distinct ohm values intermittently according to the kinetics of the injection needle of the injector.

Abstract: An electric valve device including a hollow body with an inlet and an outlet for a flow of fluid, in particular a liquid, between which, inside said body, there is defined a chamber in which there is provided a valve seat intended to cooperate with an associated closing member for controlling communication between the inlet and the outlet; and a tubular guiding formation which is nominally coaxial with the valve seat and inside which there is mounted, axially displaceably to and from the seat, a core which carries the closing member and the position of which with respect to the seat can be electromagnetically controlled by means of a winding or solenoid arranged around said tubular formation. The hollow body and the tubular guiding formation are made as a single piece of moulded plastic.

Abstract: Methods and systems are provided for compensating a pulse width of a signal applied to a solenoid purge valve based on an input voltage, and delays in opening and/or closing the solenoid valve.

Abstract: Some embodiments provide irrigation valve control apparatuses comprising: a solenoid configured to cooperate with a plunger; an input stimulus source coupled with the solenoid and configured to apply an input stimulus while a plunger drive signal is not being applied and that is sufficiently small to not cause the plunger to move; sampling circuitry configured to measure one or more voltage measurements corresponding to one or more voltages across the solenoid, wherein the one or more voltage measurements are dependent upon the current position of the plunger relative to the solenoid; and control circuitry cooperated with the sampling circuitry to receive the one or more voltage measurements from the sampling circuitry, wherein the control circuitry is configured to determine whether the plunger is in one of the open and closed positions based on the one or more voltage measurements.

Abstract: A power assist hydraulic steering system comprises a helm pump hydraulically connected to a first hydraulic actuator. A power assist pump is hydraulically connected to a second hydraulic actuator. The first and second hydraulic actuators are coupled. A flow sensing mechanism is disposed along a hydraulic conduit which hydraulically connects the helm pump to the first hydraulic actuator. The flow sensing mechanism senses when fluid flows from the helm pump to the first hydraulic actuator. A motor actuates the power assist pump when the flow sensing mechanism senses that fluid is flowing from the helm pump to the first hydraulic actuator. In one embodiment the first hydraulic actuator is a servo cylinder and the second hydraulic actuator is a drive cylinder.

Abstract: According to some embodiments, sewer alarm devices and apparatus are provided for detecting the presence of liquid within a pipe. In some embodiments, the devices and apparatus include a housing defining an interior volume, the housing including a top portion and a bottom portion, the bottom portion mounted on an exterior surface of the pipe. At least a first mounting portion extends outwardly from the housing and receives at least a first strap securing the housing to the exterior surface of the pipe. A probe housing extends from the interior volume of the housing to an interior of the pipe, and at least a first probe is disposed within the probe housing and exposed to the interior of the pipe along a first direction substantially along a center axis of the pipe.

Abstract: Generally, a linear position monitor including a rotatable member having a toothed periphery configured to directly rotatably engage a longitudinal linear portion of a spiral thread coupled to an elongate member whereby an amount of linear travel of the elongate member directly reversibly rotatably drives the rotatable member operationally coupled to a linear position indicator calibrated to translate rotation of the rotatable member about the rotation axis into an elongate member location value corresponding to a location of the elongate member in the amount of linear travel.

Abstract: A control valve monitoring system is disclosed. The control valve monitoring system includes at least one sensor connected to one of a valve stem or valve shaft, and the at least one sensor detects a change in mechanical integrity of one of the valve stem or valve shaft. A device for providing data regarding the change in mechanical integrity of one of the valve stem or valve shaft is provided, allowing maintenance of the valve shaft or valve stem to be conducted in an efficient manner.

Abstract: A rotary position sensor for determining the rotary position of a rotary component may include a sensor and a magnet. The sensor may be responsive to a characteristic of a magnetic field that changes as the magnetic field moves. The magnet may be carried by the rotary component for rotation with the rotary component. A buffer may be provided around the magnet to limit distortion of the magnet field. The buffer is effective against objects normally located in the area of a device with which the sensor is used (e.g. adjacent components) as well as against foreign objects not normally in the area of the device.

Abstract: Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.

Abstract: A solenoid valve includes a plunger head, an actuating device, a seal sheet and an air tap assembly. The actuating device has a connection member coupled with the plunger head. The seal sheet is disposed on the actuating device. The air tap assembly is secured to the actuating device and has a cavity. The air tap assembly includes a main body, a first and a second tubes. The first tube protrudes from the main body and defines a first through hole. The main body defines a second through hole communicated with the first through hole and the cavity. The second tube defines a third through hole. The main body defines a fourth through hole extended from the third through hole and a fifth through hole extended from the fourth through hole to the cavity. The plunger head is used to seal the second and fifth through holes.

Abstract: A gas regulator includes a valve block, a pressure regulating assembly, and a metal coil. The valve block includes an input gateway, an output gateway, and a pressure reducing chamber. The metal coil is provided in the pressure reducing chamber. The pressure regulating assembly includes a membrane provided in the pressure reducing chamber, a movable member connected to the membrane, and a shielding member connected to the movable member, wherein the movable member has a magnetic element received in the metal coil. The membrane deforms with gas pressure changes of a connected gas source, and makes the movable member move the shielding member to change an output gas flow of the input gateway. The magnetic element is then moved relatively to the metal coil to generate an induced emf, which precisely indicates the gas pressure changes of the gas source.

Abstract: An electronic expansion valve is provided, a sleeve is fixed in a main valve cavity of the electronic expansion valve, and a valve core seat is axially movably provided in the sleeve; a circumferential side wall of the sleeve is provided with a sleeve flow passage, and a circumferential side wall of the valve core seat is provided with a valve core seat side hole; and when the refrigerant flows forward, the valve core seat closes the main valve port to disconnect a communication between the sleeve flow passage and the valve core seat side hole, and the refrigerant flows to the valve core valve port through the sleeve flow passage; and when the refrigerant flows reversely, the valve core seat moves upward to open the main valve port to communicate the valve core seat side hole with the sleeve flow passage.

Abstract: The invention relates to a switching valve for liquid chromatography having a stator in which multiple ports are formed. Each port is formed by in each case one duct which is connected at one end to in each case one connection port and which, at the other end, has a predetermined port opening cross section at a stator face surface of the stator. The switching valve includes a rotor which has a rotor face surface which interacts with the stator face surface and in which are formed at least one or more grooves. Depending on the rotational position of the rotor with respect to the stator, in at least one predetermined switching position, the switching valve connects respective predetermined port opening cross sections in a pressure-tight manner. The switching valve further includes a drive device for driving the rotor in rotation, and a device for detecting the rotational position of the rotor, which device generates a signal corresponding to the absolute or relative position of the rotor.

Abstract: An electronic expansion valve is provided, which includes a main valve cavity. A sleeve is fixed in the main valve cavity. A lower end part of the sleeve is supported by a valve seat, and the lower end part of the sleeve surrounds a main valve port. A valve core seat is axially movably arranged in the sleeve. A lower part of the valve needle component extends into the sleeve to open and close the valve core valve port. A circumferential side wall of the sleeve is provided with a first communicating hole close to the main valve port and a second communicating hole away from the main valve port. The structural design of the electronic expansion valve may prevent an excessive impact on a valve core seat caused by the refrigerant with high pressure when the refrigerant flows forward, thereby preventing the eccentricity of the valve core seat.

Abstract: An electronic expansion valve includes a drive component including a screw rod which reciprocates axially and a nut which cooperates with the screw rod by screw threads, and a lower end of the screw rod forms the valve needle component. A sleeve is fixed in the main valve cavity, an upper portion of the sleeve cooperates with the nut, and a lower end of the sleeve is supported by the valve seat and surrounds the main valve port. The valve core seat is axially movably arranged in the sleeve, and the lower end of the screw rod extends into the sleeve to open and close the valve core valve port. The structural design of the electronic expansion valve prevents an excessive impact on a valve core seat caused by the refrigerant with high pressure when the refrigerant flows forward, thereby preventing the eccentricity of the valve core seat.

Abstract: An electromagnetic control device has a coil with a central axis and an interior space, and a control element that moves along the axis and is arranged at least partially within an interior space of the coil. The control element comprises an armature that axially moves to a desired position when the coil is energized. The coil is divided into at least two separate portions that are arranged axially behind one another and connected electrically in series with one another. An electric central tap is provided, between two adjacent coil portions, by which a sensor current, provided for determining an axial position of the armature, can be fed into a subset of the coil portions. When the armature is in a defined axial position, an axial end face of the armature is located within an axial area determined by an axial separation zone provided between two adjacent coil portions.

Abstract: A mattress and a method of adjusting the pressure of a mattress are provided. The method includes a first process of measuring internal pressure before a user lies on a mattress having at least two zones in which cells having a closed inner space filled with fluid are formed, a second process of measuring an increase in the internal pressure of each cell occurring when the user lies on the mattress, and an average pressure adjusting process of adjusting an amount of the fluid introduced into each cell of the mattress based on a pressure variation caused by a difference between the internal pressure detected from each cell in the first process and the internal pressure detected from each cell in the second process.

Abstract: The invention relates to a shaping apparatus (1) for the shaping of plastics material pre-forms (10) into plastics material containers (10A) with a plurality of blow moulding stations (8) and with at least one control device (55; 55A; 55B; 55C) for the control of blow molding pressures and/or volume flows at the blow molding stations (8), in which the at least one control device (55; 55A; 55B; 55C) comprises at least one control valve (56) with a control piston part (58) which is guided in a cylinder part (57) and by means of which a cross-section (59) of a blow molding air duct (60) is capable of being closed, wherein the control device (55; 55A; 55B; 55C) has a drive unit (61) operating in an electromagnetic manner in order to effect a change in position of the control piston part (58) inside the cylinder part (57) and thus also to control the blow molding pressures and/or volume flows at the blow molding stations (8).

Abstract: A module arrangement including a plurality of functional modules lined up in a stacking direction, which are connected to one another for fluidic and electric communication, wherein a functional module includes a plate-shaped base body having two parallel, opposite joining surfaces which are designed to contact joining surfaces of adjacent base bodies, wherein the base body includes a connecting device designed for transferring electric signals and/or electric supply voltages and/or fluid flows between adjacent functional modules along the stacking direction, and wherein several signal lines selectable by the control module extend along the stacking direction of the functional modules for transmitting control signals provided for the direct selection of individual functional modules wherein at least one storage device for detecting, buffering and transferring at least one electric signal of an external component is electrically looped into at least one signal line.

Abstract: A handle 13 is formed in a hollow shape. A displacement sensor 4 is fixed to an inner surface of the handle 13. The target 5 includes: a target body 22 which is arranged at a position away from a valve stem by a predetermined distance in the handle 13; a detection-use inclined surface 23 which is formed on a surface of the target body 22 which faces the displacement sensor 4 in an opposed manner; and a downwardly projecting portion 25 which projects downward from the target body 22. A lower surface of the downwardly projecting portion 25 of the target 5 is received by a valve body 11b so that the target 5 is rotated together with the handle 13 but is not upwardly and downwardly moved with respect to the valve body 11b.

Abstract: A pneumatically powered pump for liquid color adapted to fit partially within a liquid color container having a body portion of the pump within the liquid color container adapted to be mounted on the underside of the container lid and being a single piece of molded plastic overlying an aperture in the container lid.

Abstract: Methods and apparatus for acoustic fluid valve calibration are disclosed herein. An example method involves rotating a closure member of a valve to a involves rotating a closure member of a valve to a plurality of positions along a valve stroke, obtaining acoustic emission signals generated by a fluid passing through the valve using a sensor when the closure member is in the positions, and identifying, using a processor, a zero position of the closure member based on the acoustic emission signals.

Abstract: A linear solenoid has a moving core, a main coil, and a magnetically attractive core. The moving core is supported to be capable of sliding in an axial direction of the moving core. The main coil winds around the moving core and forms a tubular shape. The magnetically attractive core magnetically attracts the moving core based on magnetic force caused by the main coil. The linear solenoid may further have a secondary coil disposed separately from the main coil so that the secondary coil intersects with the moving core at a position corresponding to the secondary coil when the moving core moves toward the magnetically attractive core.

Abstract: An arrangement for use in a utility meter includes a switch, a processing circuit, and a magnetic element. The switch is supported on a first meter structure. The switch has at least a first and second state. The switch is configured to transition from a first state to a second state responsive to a detected magnetic field of a first polarity, and to transition from a second state to a first state responsive to a detected magnetic field of a second polarity. The processing circuit is operably coupled to determine whether the switch is in the first state or the second state. The magnetic element is supported on a second meter structure configured to be physically connected to the first meter structure, the magnetic element positioned such that removal of the second meter structure from the first meter structure causes the magnetic element to expose the switch to a magnetic field of the first polarity.

Abstract: A system and method for measuring the liquid level in a tank or container is provided. The system can have a sensor string comprising a plurality of analog output hall-effect sensors and a computer readable memory containing sensor string information, a float having a magnetic field and positionable relative to the sensor string, and a controller containing at least one processing unit, at least one memory and a sensor string interface for connecting the controller to the sensor string. The system can be operative to obtain the sensor string information from the at least one memory of the sensor string, obtain a preloaded waveform indicating the output of a sensor relative to the position of the float and approximate the position of the float relative to the sensor string using the normalized output of at least one of the sensors and the preloaded waveform.

Abstract: To provide an opening degree detection device for an automatically operated valve which is easily assembled into an automatically operated valve, makes it easy to ensure detection accuracy at the time of assembling the opening degree detection device, and is easily applicable to an existing automatically operated valve. The opening degree detection device includes: a base plate 4 which is detachably mounted on an automatically operated valve 2; a displacement sensor 5; and a target 6 having an inclined detection surface 6a which is detected by the displacement sensor 5. The target 6 is fixed to the base plate 4. The displacement sensor 5 is supported on a valve stem 14 by way of a sensor support member 21, and the sensor support member 21 is supported on the base plate 4 by way of a guide means.

Abstract: A system for detection of degradation of a valve mechanism by measuring, for example, the time between powering an actuator and opening of the valve or the time between un-powering the actuator and closing of the valve. Time measurements may be compared with a predetermined threshold or previous measurements. An indication of a gradual degradation of the valve may be detected by an evaluation of a trend of measurements. Thus, a user may be notified of an impending failure before an actual failure of the valve. Diagnostic analysis may be of one or more items selected from a group consisting of combinations of time delays and distances of valve movement upon application and removal of power to the actuator, and one or more performance issues may be correlated for each of many combinations.

Abstract: Apparatus includes a spindle having an outer surface configured with a surface finish that has openings/grooves, the outer surface also having an outer diameter; and also includes a switch target arrangement having a switch target in combination a target ring configured to be installed in the switch target so as to form the at least one switch target arrangement, and is also configured with an aperture having an inner diameter that is smaller than the outer diameter of the surface finish of the spindle, so that when the at least one switch target arrangement is installed over the spindle, interference causes at least a portion of the target ring to deflect into a groove/space of the surface finish of the spindle so as to energize the target ring to grip the surface finish of the spindle to secure the switch target when the spindle moves.

Abstract: A blowout preventer for sealing a tubular of a wellbore is provided. The blowout preventer has a housing having a bore therethrough for receiving the tubular, at least one ram slidably positionable in the housing (each of the rams having a ram block for sealing engagement about the tubular), an actuator for selectively driving the ram block (the actuator comprising a piston slidably positionable in a cylinder), and a monitor for detecting the piston therein. The monitor has a visual indicator on an exterior of the cylinder. The visual indicator is operatively coupled to the piston for displaying a position of the piston as the piston travels within the cylinder whereby a position of the ram may be determined.

Abstract: A status assembly to provide visual and electronic indication of the position (open, closed, in-between) of the ram of a ram-type blowout preventer (BOP). The assembly is capable of coupling with a hydraulic motor that can be used to open and close the ram locks. The status assembly includes a rotatable element protruding from the BOP, a gear rotatable by the rotatable element, and an indicator that indicates the rotation position of the rotatable element and thus the linear position of the BOP ram. Some embodiments can also include a sensor that outputs an electronic signal to the system operator and can be incorporated into the main display for the BOP control system. This device is able to give immediate feedback to operators and to indicate whether each ram has achieved its intended travel.

Abstract: The invention relates to an actuating device for housed or housingless valves; in particular for valves for pipelines for transporting liquid or gaseous medium, preferably for pipelines above a nominal diameter of DN 100 or channels, having a drive motor, having a gearing (2), and having an emergency running drive (3) by means of which the gearing (2) can be actuated independently of the drive motor, wherein as a drive motor a servo motor (4) is provided which has a measuring device which determines the respectively present position of the servo motor (4) in relation to its initial position and outputs corresponding measured values, a working memory is provided into which the measured values of the measuring device of the servo motor (4) are written, an electronic control unit (8) is provided which reads out the measured values of the measuring device of the servo motor (4); and performs position control of the servo motor (4) and therefore of the actuating device on the basis of the measured values from the

Abstract: A valve assembly may include a valve disposed in a flow path and an actuator disposed above the valve. The actuator may be configured to actuate the valve to move between an open position and a closed position. The valve may also include a rocking member disposed above the actuator and configured to move with the valve. The valve may also include a pair of first and second position sensors disposed above and parallel to the actuator. The pair of first and second position sensors may be configured to detect a position of the rocking member. The position of the rocking member may be indicative of a position of the valve.

Abstract: A remote actuator device for a valve control knob on a tank (e.g., storage tank) is disclosed.

Abstract: A flow control valve and a valve-position monitoring and control system coupled to the valve member and configured to precisely determine valve conditions related to the rotary position of the valve member. The system has an array of spaced apart transducers in an arcuate arrangement and in a fixed, non-moveable position relative to the valve's housing. A magnetic-field source is fixed to and rotates with the valve member as a unit. The magnetic-field source includes magnetic members adjacent to and out of physical engagement with the transducers. The magnetic member moves along an arcuate path parallel to the arcuate arrangement of the transducers as the valve member rotates through the plurality of rotary positions. The magnetic-field source provides magnetic flux detectable by at least a plurality of the transducers to precisely determine the rotational position of the magnetic-field source and/or the valve member, and the fluid flow rate through the control valve.

Abstract: A method for detecting a closing moment of a valve having a coil drive includes impressing an electrical voltage in the exciter coil to generate an exciter current through the coil, which attracts the movable armature and lifts the valve element off its valve seat. After the exciter current decays to zero, the voltage profile at the exciter coil is sampled and read out over time in the form of time value/voltage value pairs. The detected voltage values and time valves are transformed by the formation of a logarithm to form a transformed function. The transformed function is subsequently derived numerically with the formation of a derivation function. A transformed time value corresponding to the valve closing moment is detected based on the derivation function of a predetermined threshold value S being undershot, and the closing moment is calculated therefrom by inverse transformation.

Abstract: Apparatus for determining whether a valve is fully opened or closed. In one embodiment a valve position translator includes a cam tube and a rod. The cam tube has a cylindrical wall. A first slot in the wall is disposed along a radial arc of the tube. A second slot in the wall extends from an end of the first slot at an angle acute to the first slot. The rod extends through the wall, and rotates the cam tube while moving linearly along the cam tube in the second slot and while moving in an arc in the first slot.

Abstract: A valve control system for a compressed air foam generation apparatus includes a control board with a scrolling light display to indicate the quality of foam being produced. The control board is coupled to a manually operated valve by a string potentiometer. The string potentiometer connects at a ring coupled to the valve, such that turning of the valve causes the string potentiometer cable to extend or retract, thereby indicating the degree to which the solution valve is opened.

Abstract: Construction of a valve-member monitoring system using wireless communication is facilitated. The valve-member monitoring system is structured with operating-condition sensors each attached to each of multiple steam traps installed on a manifold. The manifold serves as a discharged condensate collecting pipe in which condensate is discharged through the multiple steam traps. The valve-member monitoring system further includes a sensor controlling terminal device that is attached to the manifold or in the vicinity of the manifold and exchanges information by radio with a central control apparatus. In the valve-member monitoring system, the terminal device is connected to the operating-condition sensors each attached to each of the steam traps installed on the manifold with lead lines.

Abstract: An actuating device (4) for actuating valves, having a spindle (5), wherein the actuating device is designed as a hand wheel (4) with a locking element (32) and with an electric feedback device (6), characterized in that the locking element (32) is formed in one piece and is arranged integrally in the hand wheel (4).

Abstract: The present invention provides a cutoff valve control apparatus capable of predicting a failure of devices therein with a failure diagnosis based on an operation test when the cutoff valve control apparatus is set. The cutoff valve control apparatus includes a judging device to judge a normal state or an abnormal state of the apparatus based on a pressure characteristic of an internal pressure of a cylinder measured with a pressure sensor when an air is supplied to the cylinder of an air cylinder from an air supply source, and a memory device storing beforehand the pressure characteristic of the internal pressure of the cylinder of an initial normal operation of the apparatus and the pressure characteristic of a failure prediction boundary.

Abstract: A valve arrangement to ensure zero leakage from a blind flange valve is described. The blind flange valve is adapted to seal a pipeline into complete sealing according to set requirements. The base, or bottom, of the blind flange valve is in fluid communication with the inlet of an actuateable first valve that is in fluid communication with the inlet of a second actuateable valve. A fluid chamber is in fluid communication with the outlet from the first valve and the inlet of the second valve. The outlet from the second valve can be drained out, and that respective actuateable valves can be actuated by signal from predetermined sensor or sensors.

Abstract: Gas lift plungers and methods are provided. The gas lift plunger includes a body including a first end, a second end, a valve seat extending from the first end, and a bore extending between the valve seat and the second end. The gas lift plunger also includes a valve element configured to be received through the bore. The valve element includes a first end, a second end, and a valve-engaging portion extending radially outward from a main portion of the valve element. The valve element is movable in the bore between an open position and a closed position. In the closed position, the valve-engaging portion engages the valve seat, and the valve element extends through the second end of the. Further, in the open position, the valve-engaging portion is separated from the valve seat, allowing fluid communication through the bore.

Abstract: Valve comprising a shutter (2) rotating as one (A) with a shaft (3) and a sensor sensing the rotational position of the shaft (3), which comprises a target holder (4a) push-fitted onto the shaft (3), a plate (6) slipped onto the shaft (3), the target holder (4a) and the annular part (6a) being in one and the same plane.

Abstract: An electromechanically actuated, hydraulic control valve with a double slide arranged in a valve housing which is in fluid communication with at least three hydraulic-fluid ports wherein a first and a second axially movable valve slide are, independently of each other, arranged to sealingly abut corresponding portions of a double valve seat, each valve slide is provided with a slide nut which is in engagement with an external threaded portion on the valve slide and is connected via transmission means to an actuator, and to each valve slide, a position sensor is connected, arranged to indicate a rotational motion of the slide nut.