Abstract: An air tower assembly includes an outer housing, a duct with a damper opening, a damper configured to control a flow of air from a freezer compartment to a fresh food compartment, and at least partially transparent rear cover sheet attached to a rear of the outer housing that contains the duct and the damper within the air tower assembly. The rear cover sheet may be transparent or may have a clear or semi-opaque surface configured to allow visual confirmation of the damper during assembly, operation, and service. An air passageway is provided between the freezer compartment and the fresh food compartment to allow air to flow from the fresh food compartment to the freezer compartment.

Abstract: A cable actuator comprising a chassis (1), a screw (2) rotatably mounted on the chassis and driven by an electric motor, a nut (4) that engages with the screw and is combined with anti-rotation means such that rotation of the screw under the action of the motor causes an axial displacement of the nut, two cables (10) coupled to the nut on either side of same, the two cables being wound onto respective joint pulleys (11) each rigidly connected to a same joint shaft (12) and in which the joint pulleys have a helical groove, the helical grooves of the pulleys extending in opposing directions.

Abstract: A rotary fluid regulator (1) has a housing (2) with an intake opening (3), at least one outlet opening (4), and a hollow valve element (5) that is received rotatably in the housing (2) forming a fluid duct (6). An electromotive drive element (13) is provided and rotates the valve element (5). Rotation of the valve element (5) enables a fluidic connection between the intake opening (3) and at least one outlet opening (4) to be adjusted or blocked.

Abstract: The invention relates to a double distributor for distributing the intake fluid of an internal combustion engine and controlling the temperature thereof, comprising a body (1) in which first and second channels for circulating said intake fluid are arranged, first (10) and second (20) shutters being positioned in said channels in order to distribute the flow passing through said channels, said distributor also including a motor (9) for actuating said shutters and kinematics simultaneously actuating the first and second shutters according to a movement law in response to an actuation of said motor, said kinematics comprising an inactive position in which said shutters are positioned when no force is supplied by said actuator motor, characterized in that said kinematics are configured such that said shutters can strictly follow said movement law when actuated by the motor from said inactive position without returning to said position.

Abstract: A valve device includes: a drive source; a turning member; a valve body, being fixed to the turning member and integrally turned with the turning member; and a valve seat, being sliding contacted with an end face of the valve body opposite to the end face of the valve body contacting with the turning member. The valve seat has at least one outflow hole for fluid passing through the valve device. The valve body has a throttle part being a minute hole that communicates with the outflow hole in a part of a turning angle of the valve body. A flow passage has an opening part provided between opposed faces of the turning member and the valve body, thus the throttle part is communicated with an inflow hole for the fluid and inflow of an individual matter having a size unable to pass through the throttle part is shielded.

Abstract: A linear drive and its use for machining an optical workpiece are proposed, the linear drive having a linear movable rotor, a linearly movable compensating body and an electrical compensating drive for movement of the compensating body opposite to the rotor and the rotor extending into the compensating drive and/or a first bearing arrangement mounting the rotor in a torsionally stiff manner and a second bearing arrangement pivotally mounting the rotor.

Abstract: A motor with a speed reducer, comprising a motor main body including a rotary shaft; a speed reducer portion including a worm and a worm wheel, a housing including a housing main body and a housing cover, the housing main body accommodating the speed reducer portion and being open to one side in an axial direction of the worm wheel; a circuit board accommodated in the housing, a power component disposed at one side of the circuit board; and a heat-receiving portion disposed at the housing main body, the heat-receiving portion being adjacent to the worm and disposed such that a part of the heat-receiving portion overlaps with the worm as viewed from the side thereof where the opening of the housing main body is disposed, and the heat-receiving portion touching against a face at the other side of the circuit board and receiving heat generated by the power component.

Abstract: A drive control device and method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.

Abstract: Devices and methods for operating a linear actuator, optionally for use in controlling a choke valve as part of a managed pressure drilling operation. Such a device may include a motor, a transmission, a linear actuator and an override mechanism selectively engageable with the transmission to enable operation of the linear actuator independently of the motor.

Abstract: An actuating device for displacing a control device, such as a valve, gate valve, or the like, particularly for use in oil or gas production systems. The actuating device includes at least one torque motor having an electric drive and a thread drive that is rotatable by the electric drive. The actuating device also includes a threaded spindle, a screw nut, a torque control/regulation device, and a position detection device. The threaded spindle is axially displaceable to displace a flow control device between an advanced position and a retracted position. The torque motor is connected to the screw nut in a rotationally-fixed manner and the position detection device is assigned to the threaded spindle to determine the axial position thereof.

Abstract: A damper device may include a baffle to open/close an opening part; a motor; and a gear train connecting the motor and the baffle and including a partially toothless gear and a sector gear. The partially toothless gear may include an outer peripheral part so as to have an outer peripheral face curved along a tooth tip circle of the teeth part. The outer peripheral part may include an end face at a midway position of the teeth part in the axial line direction where a length in the axial line direction is shorter than a tooth width of the teeth part. The sector gear may include a first tooth cut out facing the outer peripheral face and configured to enter in to an inner peripheral side of the tooth tip circle. A second tooth disposed adjacent to the first tooth and configured to abut the outer peripheral face.

Abstract: Provided is a motor-driven valve with a simple configuration that can solve hysteresis generated when the rotary direction changes, without greatly changing a conventional motor-driving valve. A friction angle of an external thread and an internal thread of a thread feeding mechanism, a lead angle thereof, and a biasing force of a compression coil spring inserted between a valve shaft and a valve body are set so as to always bias the valve shaft making up the thread feeding mechanism to the valve body in a rotating direction in one direction or in the other direction in both of the upward-moving stroke and the downward-moving stroke.

Abstract: A control system for pressure controllers in explosion risk areas has a pressure controller with adjusting screw to control the pressure inside a conduit used to transport explosive gas. An adapter with a hole is adapted to receive the head of the adjusting screw. An electrical motor adapted to be used in risk explosion areas is provided with a driving shaft connected to the adapter. A support with body has a first end wherein a first hole is obtained to receive a shank of the pressure controller and a second end wherein a second hole is obtained to receive the adapter. A cable box connected to a telecommunication network is provided to remotely control the motor.

Abstract: A device for a valve actuator is described, the valve actuator being provided with a spindle nut surrounding a portion of an actuator spindle and engaging an external threaded portion arranged on the actuator spindle, the spindle nut being axially fixed relative to the actuator spindle, and the actuator spindle being in rotation-preventing engagement with an end cap or an actuator housing, and the spindle nut being connected via transmission means to a first driving motor.

Abstract: A turbocharger includes: a turbine housing which houses a turbine impeller; an introduction hole provided in the turbine housing and configured to guide an exhaust gas, which flows into the introduction hole from an exhaust manifold of an engine, to the turbine impeller; a valve provided inside the introduction hole and configured to open and close an exhaust-gas discharge hole in the exhaust manifold; and a restriction portion configured to restrict a turn of the mounting plate in order to make part of an outer peripheral surface of a stem, which is exposed through an exposure hole of the mounting plate, visible from outside of the turbine housing.

Abstract: The invention intends to improve a stator which is detachably installed to an outer peripheral portion of a can accommodating a rotor. The stator is integrally formed with a resin mold by arranging a stator assembly (110) within metal molds (300, 310) and injecting a molten resin (P1) from a gate (G1) at one position. An annular plate (160) is mounted to an upper portion of the stator assembly (110) so as to prevent the molten resin from intruding into magnetic pole teeth (120a, 122a), and prevent a weld line from being generated in an outer peripheral surface of the resin mold.

Abstract: A control and supply unit for an actuating device of a choke, a valve, a blow-up preventer or some other device applied in the field of oil and natural gas production includes at least an auxiliary power supply which is specially rechargeable, and a connecting means used for an exchange of data and/or for the purpose of voltage supply. To improve such a control and supply unit, such that the respective connecting means satisfy a relevant standard and has a compact structural design and is also easily accessible from outside, the control and supply unit includes, as a connecting means, a communication interface for connecting thereto a field bus and a voltage supply connection for connecting thereto a voltage supply line.

Abstract: A valve operating device includes a mounting for attachment to a vehicle and an elongate arm, the free end of which is only moveable across the underlying ground. The joints of the arm pivot around vertical axes and the arm is locked into a desired orientation by a brake at each joint. A valve turning machine is at the free end of the arm. The brakes are engaged and released by a control on the valve turning machine.

Abstract: A compliant cam system includes a cam having a cam body rotatable with respect to a cam rotational axis. The cam body has a cam body center spaced from the cam rotational axis. At least a portion of the cam is an elastically compressible material. A follower having at least one follower surface is in contact with the compressible material portion of the cam. A cam non-deflected condition is defined when an elastically compressible material portion outer surface is in contact with the cam follower surface prior to deflection of the elastically compressible material portion. The cam when thereafter rotated with respect to the cam rotational axis moves the cam body center toward the follower. The elastically compressible material portion deflects, defining a deflected condition, creating a biasing force acting toward the follower, and releasably frictionally engaging the elastically compressible material portion with the follower.

Abstract: A rotary shear valve having three-point stator seating is provided. Three contact points are predetermined between a bottom of the stator and a valve body rim and three clamping pads may also be predetermined. The three clamping pads and the three points of contact between stator and the valve body rim are corresponding and aligned when the rotary shear valve is assembled so that the clamping or compression forces on both sides of the stator directly oppose one another, thereby effectively canceling each other. In one embodiment, the stator includes three contact points on the bottom surface proximate the periphery of the stator to contact the valve rim and a gasket includes three clamping pads proximate the periphery of the gasket web to apply a compression force on the top surface of the stator above the three contact points.

Abstract: A most recent electrostatic capacitance value for a backup capacitor is measured periodically. Each time the most recent electrostatic capacitance value is measured, a charging voltage (a required charging voltage) that is required in order to cause a return operation of a valve from the setting opening at that time to an emergency opening/closing position (for example, the fully closed position) is calculated based on the electrostatic capacitance value that has been measured, and the terminal voltage of the backup capacitor is adjusted so as to become equal to the calculated required charging voltage.

Abstract: A powered valve actuator assembly converts a manually operated valve without removal of the valve handle for automated valve operation in response to detection of a preselected condition. The design incorporates a motor, motor control circuit, drive shaft, valve handle engaging member and anti-rotation member. The motor is supported by its drive shaft, which is mounted on the valve handle via an adaptor. The motor, when operated, applies rotational torque to the drive shaft, and is secured from counter rotation about the drive shaft by the anti-rotation member, which extends between the motor and a fixed reference point with respect to the valve body such as the conduit or an extension thereof. The control circuit may incorporate a monitoring sub-circuit and power regulator, which operates at reduced power levels depending on the sensed state of the sensor or sensors.

Abstract: An electromagnetic valve apparatus with nonlinear springs for variable valve timing in an internal combustion engine. The apparatus includes a valve, floating spring assembly, translational cam, and motor. The cam and spring serve to minimize lash and valve stem bending forces. During opening and closing of the valve, spring potential energy is converted into valve kinetic energy and then back into potential energy at the end of the motion. The potential energy is then available for the next opening/closing event. The motor initiates motion, replaces friction and vibration losses, and terminates motion. However, the motor supplies minimal energy as the valve opens and closes, and vice-versa, naturally due to combined effects of system inertia and the nonlinear spring. In addition to valve control, the apparatus may be applied to fuel injectors, or any reciprocating linear or rotary mechanism where electronic control is used.

Abstract: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position. A diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The tank isolation valve reduces power consumption from the battery, while the valve is being held in either an open position or a closed position by the latching mechanism, and uses only a single pulse of voltage to change the state of the valve.

Abstract: A number of variations may include an actuator and valve arrangement.

Abstract: An actuating device or displacing a control device, such as a valve, gate valve or other control mechanism, in particular for use in oil or gas production systems, comprises a motor-gear unit (21) and a thread drive (22) which is operable by said motor-gear unit (21) and which comprises at least a threaded spindle (23) and a screw nut (24). The threaded spindle (23) is displaceable in an essentially axial direction so as to displace the control device (2) between a use position (7) and a non-use position (8, 9, 19, 20). To ensure a safe displacement into the non-use position in a simple way and independently of the pressure conditions prevailing between conveying medium and inner medium, the threaded spindle (23) is substantially axially displaceable beyond the use position (7) into a second non-use position (9). The invention also refers to a corresponding method for displacing the actuating device.

Abstract: A valve (210) comprising a motor (221) having an output shaft (231) orientated about a motor axis (230), a hydraulic valve having a drive spool (224) configured to move from a first position to a second position, a mechanical linkage (222) between the output shaft (231) and the drive spool (224) having a sleeve (232) mechanically coupled to the output shaft (231), a pole shaft (233) configured for sliding engagement in a direction generally perpendicular to the motor axis, a link (235) connected to the pole shaft (233) by a pivot joint (234), a drive shaft (252) coupled to the link (235) and rotatable about a drive axis, the drive shaft (252) having an end portion to engage and apply a force to the spool (224), and a spring (223) to provide a bias between the pole shaft (233) and the sleeve (232), such that a distance between the motor axis and the pivot joint multiplied by a distance between the drive axis and the applied force is less than a distance between the drive axis and the pivot joint.

Abstract: The invention relates to an axial valve comprising an actuator (15) and a center tube (19). The actuator comprises a stationary element (16) and a closing element (17), and the center tube (19) is placed axially in relation to an axial extension of the stationary element (16). The center tube (19) is in a fixed position relative to the stationary element (16). Fluid, such as refrigerant, is intended for flowing through the valve and through the center tube. The center tube (19) comprises orifices (22) for fluid passage. The closing element (17) is placed axially to an axial extension of the center tube (19) and is movable axially along the center tube between a first position, where the closing element closes the orifices (22) of the center tube, thereby not allowing fluid to pass the orifices, and a second position, where the orifices (22) are open, thereby allowing fluid to pass the orifices.

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: An air valve arrangement for a motor vehicle, comprising a frame and an air valve provided on said frame so as to be rotatable thereto about an axis of relative movement (R) in opposing directions of relative rotation, the frame comprising an air passage opening, and the air valve is provided in such a way on the frame that it is rotatable between a shut-off position and a passage position, the air valve in the passage position reducing a passage opening area of the air passage opening less than in the shut-off position, and further comprising a drive, which is designed to drive the air valve in at least one first direction of relative rotation about the axis of relative movement (R) for relative rotation, characterized in that the air valve is coupled to a preloading device, which preloads the air valve in a direction of relative rotation.

Abstract: A gas shut-off valve for installation in gas meters, has a valve disk that can be moved in the longitudinal direction with respect to its valve seat. The movement is realized by a linear unit held in the longitudinal direction in a valve casing, which is actuated by an electric motor via reduction gearing. The valve seat has a lip seal. The electric motor is a small DC motor. The reduction gearing and the linear unit, are installed in a panel of the valve casing. The linear unit is a rack-and-pinion gearing or a sliding-screw gearing, having an adjusting-nut element and an adjusting rod.

Abstract: An electronically controlled stepper motor valve utilizes an electric feed through assembly providing electrical connection between the stepper motor and a mating cable connector; wherein the electric feed through assembly includes four individual leads that are sequenced to allow the mating cable connector to be installed in any of four positions, each 90 degrees apart. The ability to use a 90 degree elbow style cable connector allows the EEV footprint to be minimized which provides an advantage when the electric expansion valve is installed in the tight confines of a package system.

Abstract: A bidirectional blockage-free gear-driven shutoff valve for gas meter purpose, and belongs to an electromechanical valve for gas meter includes an outer housing in which an inner housing is installed; a motor, a gear box and a valve rod are installed in the inner housing; a ratchet duplex gear and an incomplete gear are also installed in the gear box; the ratchet duplex gear is meshed with driving gear and the incomplete gear respectively; the incomplete gear is configured with a eccentric shaft which inserts into the connecting hole at the end of the valve rod; seal ring of a static seal and a reinforcement dynamic seal are utilized for the motor, which avoid corrosion of motor coil by natural gas and improve the safety of the electromechanical valve; the ratchet duplex gear is added in the gear box to match locking and unlocking between the incomplete gear and locking piece.

Abstract: A flow control valve includes a body having a body bore oriented coaxially with a longitudinal axis of the body and a seat member extending into the bore. A valve member is slidably disposed in the bore and oriented coaxially with the longitudinal axis of the body. The valve member includes a non-circular geometrically shaped head having a bore. A drive adapter includes a head receiving cavity slidingly receiving the geometrically shaped head of the valve member and preventing axial rotation of the valve member. A stepper motor is connected to the drive adapter, the stepper motor incrementally rotating a shaft engaged with the bore of the valve member. First and second equal diameter pistons of the valve member provide pressure balanced valve member operating positions.

Abstract: The invention relates to a gas control valve for the control of a quantity of gas to be supplied to a gas burner, having a direct pressure regulator which has a valve body that can be moved by an electronically controlled stepper motor.

Abstract: A valve unit, having a housing, a flap, which is rotatably arranged in the housing and connected to a flap shaft supported in the housing, an electric motor for driving the flap shaft, and a transmission arranged between the electric motor and the flap shaft. A coupling, which consists of a flap-side component, an intermediate piece, and a transmission-side component is arranged between the flap shaft and a shaft of the transmission. At least one of the three coupling parts has at least two first holes of a same radial orientation. At least two second holes are arranged perpendicular to the first holes. Molded elements of an adjacent component of the coupling engage in the holes and the holes have a greater extension with respect to the radial orientation of the holes than the molded elements that engage in the holes.

Abstract: An apparatus and method for automating the operation of a manual control valve upon the occurrence of a specified condition includes a valve handle engaging member mounted on an operating shaft turned by a motor held by a housing or support which is mountable to the manual valve body or associated conduit. The motor is operated by a motor control circuit when a sensor detects the condition. The structure and method of mounting may include a quick disconnect mechanism. The control circuit may operate at different power levels depending on the state of the sensor.

Abstract: Apparatus to provide motor backdrive resistance are described. An example apparatus described herein includes a brake to engage an output shaft of a motor. The example apparatus also includes a brake release arm operably coupled to the brake. A reaction arm is fixed relative to the brake release arm and operatively coupled to the motor. The reaction arm causes the brake to disengage the output shaft of the motor in response to a reaction torque of the motor.

Abstract: A direct drive servovalve (10) includes redundant drive motors (14) coupled to a common valve drive shaft (22,24) by a connection device (26). The connection device (26) is configured to allow operation of the servovalve (10) in the case where one or more of the drive motors (14) becomes inoperable, such as caused by jamming or binding of a rotor associated with the drive motor. By use of the connection device (26), in the event that one of the drive motors (14) was to become jammed, the remaining operable motors (14) can continue to stroke or cause translation of a valve member (18) of the direct drive servovalve (10) to allow its continued operation.

Abstract: A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area.

Abstract: The present invention provides a water flow regulating device and an ocean power generating device using the same. The water flow regulating device includes a main body, a water deflector, a rotating shaft, a winding shaft, a rope or cable, and a driving unit. The water deflector is pivotally connected with the main body. The rotating shaft is rotatably disposed at the main body. The winding shaft is disposed at the main body. One end of the rope or cable is fixed to the water deflector, and the other end bypasses the rotating shaft and the winding shaft, goes back to the water deflector and is fixed to the water deflector. The driving unit is connected with the rotating shaft to drive the rotating shaft to rotate, such that the rope or cable is driven to withdraw or release to control the water deflector to rotate.

Abstract: An electrically operated valve assembly has a valve element moved by an actuator. The actuator has a motor connected to an output via a gear train. The output is connected to the valve element. The gear train has a gear ratio which is variable depending on the actuation angle of the output shaft. Optionally, a return spring is arranged to resiliently return the output shaft to an initial actuation angle when the motor is not active.

Abstract: A valve opening and closing mechanism includes: an input shaft 2 driven by a power source; two or more output shafts 5, 6 respectively including valves 3, 4; power transmission members that transmit power from the input shaft 2 to the respective output shafts 5, 6 with varying a phase of the power; and preload application members that apply preloads respectively to the output shafts 5, 6 and the power transmission member in opposite directions. The output shafts 5, 6 may be separated from the power transmission member.

Abstract: In various embodiments, an electronic flow selector of a fluid flow control system may be used to select a flow rate of a fluid. When the system is in an electronic mode, an encoder may electronically encode the fluid flow selection. A controller may receive the electronically encoded flow selection and transmit a corresponding control signal to an electronic valve to allow the fluid to flow at the selected flow rate. When the system is in a manual mode, backup manual flow selectors may be used to directly control the flow rate of a fluid. When the system is in a manual mode, the mechanical backup flow selectors may be in a deployed position. When the system is in an electronic mode, the mechanical backup flow selectors may be in a retracted position. Particular applications to gases and anesthesia delivery are disclosed herein.

Abstract: Ring gate control system and control method are disclosed herein. An example ring gate control system includes a first servomotor group, a second servomotor group, and a third servomotor group. Each servomotor group is associated with a respective control point located around an annular face of a ring gate. The servomotors within the groups coupled to the annular face of the ring gate at respective linkage points, a transmitter coupled to the annular face of the ring gate and a control valve coupled between a hydraulic source and the at least two actuators and a controller coupled to each of the control valves and to each of the transmitters. The controller is separately operating a closed control loop for each servomotor group to control positions of the control points to control a horizontal orientation of the ring gate.

Abstract: A female screw member includes a female screw part with a female screw, and a projection part projecting in the direction of a center shaft of the female screw and having a working face in the rotating direction centering on the center shaft. The female screw part and projection part are integrally molded with a resin. The projection part has a spiral inclination face spirally inclining by one round from the working face centering on the center shaft of the female screw. The height H of the working face is equal to or smaller than a pitch P of the female screw. Using the projection part as a fully opening fixing stopper, a motor operated valve includes a valve main body having a valve seat, the female screw member attached to the valve main body, a motor having a rotator and stator, and a valve shaft. The valve shaft is screwed to a female screw of the female screw member, and is rotated and driven by the rotor, and has a fully opening movable stopper capable of contacting the fully opening fixing stopper.

Abstract: The invention concerns a valve actuator (1) comprising a housing (2) and a nut and screw arrangement. A first portion (5) of the nut and screw arrangement is operated by an electric motor (7), which is fixed to the housing (2). A means (8) is in contact with a second portion (6) of the nut and screw arrangement, and a resilient means (9) is acting between the means (8) and the housing (2). A relative rotation between the threaded nut (3) and the threaded screw (4) leads to a translation of the means (8) and an energizing or de-energizing of the resilient means (9). A locking means (10) locks the resilient means (9) in an energized state by locking the relative rotation of the nut and screw arrangement. When the locking means (10) are released, the resilient means (9), when de-energizing, acts on the means (8), leading to a translation of the means (8).

Abstract: An automate fluid flow control system includes a relief valve for being sealedly disposed within a fluid chamber in an immovable manner to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, and an actuator. The relief valve has a fluid passage for controlling a flow rate of the fluid passing from the fluid chamber to the fluid outlet, and a valve stopper sealedly closing the fluid passage for controlling the fluid flowing from the fluid chamber to the fluid outlet, wherein the valve stopper is driven to move between a closed position that the valve stopper is sealedly retained to close the fluid passage for blocking said fluid passing to the fluid outlet, and an opened position that the valve stopper is moved to unseal the fluid passage for allowing the fluid passing to the fluid outlet through the fluid passage.

Abstract: A gate valve includes a valve body and a spindle drive. The spindle drive has, at its one end, a wedge for blocking a pipe. The spindle drive includes a motor-driven spindle, wherein, wherein the spindle is connected by way of a coupling to a shaft in an axially displaceable manner, and the shaft has the wedge at its end.

Abstract: A valve actuator including a magnetic angle sensor is disclosed. The magnetic angle sensor may function as an absolute position encoder. The magnetic angle sensor may also function as an incremental position encoder. The magnetic angle sensor may generate angular velocity data. The magnetic angle sensor may be used in quarter-turn and single-turn rotary valve actuators. The magnetic angle sensor may also be used in multi-turn rotary and linear valve actuators.