Abstract: An electronic modal base valve is disclosed. The electronic modal base valve includes a motive component, a controller communicatively coupled with the motive component, and a control valve coupled with the motive component. The controller is configured to control an operation of the motive component, wherein a movement of the motive component is configured to cause the control valve to adjust a flow rate for a flow path through the electronic modal base valve.

Abstract: A valve position sensing system includes a valve housing, a tail stock extending from the valve housing, an extendable valve stem extending axially through the tail stock, and a valve sensor housing assembly. The valve sensor housing assembly includes a housing body, having an interior cavity opening to a first and a second end, where the first end has a fixed connection portion integrally formed with the housing body and a movable connection portion that is movable relative to the fixed connection portion. The fixed and movable connection portions are fitted around the tail stock to secure the first end of the housing body to the tail stock. The valve sensor housing assembly further includes a closure mechanism disposed around the first end, a backplate covering the opening of the interior cavity at the second end, and a sensor provided in the interior cavity.

Abstract: System and methods for detecting an operational status of a valve or passageway on a railway asset. The methods may comprise: resiliently biasing a magnet in a direction away from a wireless sensor node coupled to the passageway; determining that the passageway is in an open position when the wireless sensor node is neutrally polarized (the data collection device being neutrally polarized when the magnet is distant therefrom); causing the magnet to move in a direction towards the wireless sensor node responsive to a cover of the passageway being closed; and determining that the passageway is in a closed position when the wireless sensor node is magnetically polarized (the wireless sensor node being magnetically polarized when the magnet is proximate thereto).

Abstract: The invention relates to a valve apparatus (10) for vacuum applications, comprising a valve housing (20) which delimits a valve chamber (22), the valve chamber comprising a vacuum supply opening (28), a suction opening (32), and a ventilation opening (36); comprising a valve body (40) which is arranged in the valve chamber and can be displaced along a switching axis (38) between a suction position and a ventilation position, wherein the valve body in the suction position closes the ventilation opening and in the ventilation position closes the vacuum supply opening; comprising a bistable actuator (50) for driving a displacement movement of the valve body, the actuator comprising an armature (52), connected to the valve body, and an electromagnetic coil (54) for driving a displacement movement of the armature; and comprising a swing check valve (74) for opening and closing the vacuum supply opening (28). The invention also relates to a vacuum handling apparatus (100) comprising a valve apparatus (10).

Abstract: A system, method and assembly for detecting the operational status of one or more discharge gates on one or more railcars. The system and method monitor parameters that include whether the discharge gate is open or closed, whether the railcar is in motion or not, and whether the railcar is in a location where it is acceptable for the discharge gate to be open. Sensors carry out the monitoring, and the information obtained by monitoring the parameters are used to determine if a notification event has taken place and if so, a notification of such event can be transmitted to a remote receiver. A change in the status of any one of the monitored parameters can trigger the determination of whether a notification event has occurred.

Abstract: A position detection assembly for detecting a spatial position of a moveable element. The assembly includes a colour sensor and one or more colour indicators provided on a surface of the moveable element. The colour sensor is spaced from the surface of the moveable element and arranged to emit light onto the surface and detect light reflected from the surface and to determine the position of the element based on the reflected light.

Abstract: A bleed valve includes a housing. The housing includes an inlet and an outlet with a cylindrical flow path defined between the inlet and the outlet. A diametral plane is defined diametrically spanning the cylindrical flow path. A butterfly disc inside the housing is rotatably mounted to the housing along a rotation axis for rotation between an open position and a closed position. A link rotatably is connected to a pivot point on the butterfly disc for relative rotation of the link and the butterfly disc along a pivot axis parallel to the rotation axis. The pivot axis is on an opposite side of the diametral plane from the rotation axis.

Abstract: A Centering Electronic Rotary Valve (CERV) includes a drive system and a rotor structure comprising a rotor fluid channel input opening communicated with a rotor fluid channel output opening via a rotor fluid directional channel that is moveable via a rotor shaft. The rotor fluid channel input opening is adjacent to and aligned with one of a plurality of stator input channel bottom opening. The rotor fluid channel output opening is adjacent to and aligned with at least one of the plurality of stator output channel bottom openings. The drive system includes a motor and a microprocessor for (i) controlling the rotor shaft to rotate about an axis M and (ii) for positioning the rotor shaft at a defined circumferential position.

Abstract: A measurement method for a steam valve according to at least one embodiment of the present disclosure, includes: a step of measuring acceleration of a valve stem when a slave valve is opened by driving the valve stem with an actuator from a fully closed state of a master valve and the slave valve; a step of detecting a timing at which the slave valve is fully opened, based on the measured acceleration of the valve stem; and a step of calculating an amount of movement of the valve stem from a reference position to a position where the slave valve is fully opened.

Abstract: A magnetic sensor device includes first and second surfaces, and first and second inclined surfaces, which are inclined with respect to the first surface; first through third magnetic sensor units for detecting magnetism in first through third axial directions; and a signal processing unit that performs signal processing on the basis of first through third sensor signals output from the first through third magnetic sensor units. The first axial direction is a direction orthogonal to the first surface, and the second and third axial directions are directions orthogonal to each other on the first surface. The first and second magnetic sensor units are provided on the second inclined surface, respectively. A corrected signal generation unit included in the signal processing unit generates first and second corrected signals, which are the first and second sensor signals corrected in accordance with the inclination angles of the first and second inclined surfaces.

Abstract: Aspects of the present disclosure relate to obstruction detector assemblies, systems, and related methods for detecting obstructions along oil and gas equipment. In one implementation, an obstruction detector assembly includes a driver housing having an internal chamber and a plurality of fastener openings. The obstruction detector assembly includes a driver stem disposed at least partially in the internal chamber of the driver housing. The driver stem is movable partially out of the internal chamber of the driver housing. The obstruction detector assembly includes a driver head disposed outside of the driver housing and coupled to the driver stem. In one implementation, movement of the driver stem and the driver head is used to detect obstructions (such as a wireline) in a wellhead structure. In one implementation, movement of the driver stem and the driver head is used to detect obstructions (such as sand) in a valve.

Abstract: A system and method that may include receiving information and analyzing the information with respect to tiered well construction activities. The system and method may also include determining at least one constraint associated with the tiered well construction activities based on the information. The system and method may additionally include generating a workflow that includes at least a series of tiered well construction activities based on the at least one constraint. The system and method may further include generating a digital well plan that is to be executed to control field equipment to perform at least one of the series of tiered well construction activities of the workflow.

Abstract: Systems and methods described herein provide for pressure relief valve detection and monitoring. A valve assembly includes a valve body, having an inlet and an outlet, and a valve seat insert attached to the valve body between the inlet and the outlet. The valve body also includes an indicator assembly, a disk positioned within the valve seat insert; and a stem extending between the disk and the indicator assembly. The stem includes a magnet. A magnetic sensor is operable to identify proximity of the magnet. The valve seat insert is operable to release the disk when pressure at the inlet exceeds a threshold value. The disk, when released, moves the stem and magnet into a position that is detected by the magnetic sensor, and the indicator assembly indicates a valve opening event when the position is detected.

Abstract: A valve arrangement (10) for industrial automation, including at least one pneumatic valve module (4) with a module housing (5), the valve module (4) having a working port (2), an electric drive device, and at least one actuator element (6) which is arranged in the module housing (5), can be positioned, in particular proportionally, by means of the electric drive device and via whose position a valve module output pressure at the working port (2) and/or a flow rate through the working port (2) can be set, wherein the valve module (4) further has a valve module pressure sensor (7) for detecting the valve module output pressure, the valve arrangement (10) further including a diagnostic device (8) which is configured to provide a diagnostic function on the basis of the detected valve module output pressure, the diagnostic function including a failure prognosis of the valve module, a compressed air leakage detection, a compressed air consumption detection and/or a compressed air consumer localization.

Abstract: Disclosed herein is a gas fitting pressure test device in one example having a test plate with a first side configured to seal to a gas fitting. The gas fitting having a surface defining a void therein. The test device also having a gas conduit through the first side of the test plate, the gas conduit configured to be in fluid communication with an inner void of the gas fitting. The test device also having an electromagnet adjacent the second side of the test plate, configured to provide magnetic force on the gas fitting greater than the force exerted on the gas fitting. The test device having or connected to a source of positive gas pressure in fluid communication with the gas conduit.

Abstract: The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a chamber providing a treating space; and a fluid supply unit supplying a treating fluid to the chamber, and wherein the fluid supply unit includes: a supply tank storing the treating fluid; a supply line connecting the supply tank and the chamber; and a plurality of valves installed at the supply line, and wherein any one valve among the plurality of valves is provided as a safety valve, and wherein the safety valve is opened after confirming that the chamber has been switched to a closed state when supplying the treating fluid from a tank to the chamber.

Abstract: A subsurface safety valve control system including a downhole station 5 for provision in downhole metallic structure (2) of a well installation which comprises a subsurface safety valve V having an open state allowing flow through the valve and a closed state obstructing flow through the valve. The downhole station (5) is arranged for picking up electrical signals from the downhole metallic structure (2) to obtain valve control signals and for outputting control signals for controlling the subsurface safety valve V in dependence on the signals picked up from the downhole metallic structure. The downhole station (5) comprises a hardware electronics channel (5a) for handling electrical signals picked up from the downhole metallic structure and the hardware electronics channel (5a) is arranged for detecting the presence and/or absence of hold valve open signals.

Abstract: A fluid-dynamic device with integrated sensor element includes a first chamber suitable for the containment and/or the passage of a fluid, provided with an inlet opening operatively connectable to a fluid-dynamic circuit and configured to allow a fluid to enter the first chamber, and with a separate outlet opening, operatively connectable to a fluid-dynamic circuit and configured to expel said fluid from the first chamber. The first chamber includes at least one portion elastically deformable due to the action of the fluid contained therein and/or passing through the first chamber, to which a sensor element is associated which is sensitive to the deformation of the elastically deformable portion of the first chamber.

Abstract: An actuating system for a valve which can be used as a control valve. The valve system having an outer housing, a receiving region for a switching spindle of the valve, at least one inductive sensor running in parallel to the receiving region, and at least one substantially circular cylindrical position encorder.

Abstract: Device(s) and techniques determine if a gas regulator supplying gas at a regulated pressure to a gas meter (e.g., the gas meter of a house or business) within a gas distribution system has one or more lock-up failure events or venting events, wherein gas is vented to the atmosphere. In an example, a sensor obtains information indicating a relative position of a stop stem of a gas regulator and a diaphragm pin of the gas regulator. As pressure increases within the regulator, the diaphragm pin moves toward and/or touches the stop stem. The gas pressure increase may result from debris in the regulator that prevents a valve from fully closing. A signal may be sent from the regulator and/or associated gas meter. The signal may contain information based at least in part on data from the sensor, and which may indicate a lock-up failure event or a venting event by the gas regulator.

Abstract: Valve systems and related methods include at least one component comprising a conductive material and at least one inductance-to-digital converter (LDC) configured to wirelessly sense a position of the portion of the conductive material.

Abstract: An adapter cap for a fire hydrant including a hydrant actuation nut by means of which the hydrant is opened and closed by rotating the hydrant actuation nut, where the adapter cap includes a cap housing having connection means for connecting the adapter cap to the hydrant actuation nut, the cap housing having a cap actuation nut by which the adapter cap may be engaged and the cap housing including a skirt part arranged to encircle at least a part of the connection means, where a connection means centre axis of the connection means and a cap actuation nut centre axis of the cap actuation nut are arranged coaxially, where the connection means and the cap actuation nut are made from metal, and where at least a part of the skirt part is made from a polymer material, the adapter cap further includes at least one sensor arranged in the cap housing, where the at least one sensor is arranged to detect at least one operational parameter of the hydrant, and wireless communication means arranged in the cap housing for c

Abstract: Aspects of the present disclosure relate to obstruction detector assemblies, systems, and related methods for detecting obstructions along oil and gas equipment. In one implementation, an obstruction detector assembly includes a driver housing having an internal chamber and a plurality of fastener openings. The obstruction detector assembly includes a driver stem disposed at least partially in the internal chamber of the driver housing. The driver stem is movable partially out of the internal chamber of the driver housing. The obstruction detector assembly includes a driver head disposed outside of the driver housing and coupled to the driver stem. In one implementation, movement of the driver stem and the driver head is used to detect obstructions (such as a wireline) in a wellhead structure. In one implementation, movement of the driver stem and the driver head is used to detect obstructions (such as sand) in a valve.

Abstract: An electromagnetic valve manifold includes valve assemblies arranged in a single direction, each valve assembly including electromagnetic valves arranged in the single direction, a slave station disposed at one of ends of the electromagnetic valve manifold in the single direction, and a valve driving unit disposed in correspondence with each of the valve assemblies. The slave station includes a slave station output port that sends a control signal and valve driving unit power to the valve driving units. The valve driving units each include an electromagnetic valve power input port that receives electromagnetic valve power from an external device and a circuit board configured to control driving of the electromagnetic valves of a corresponding one of the valve assemblies using the control signal and send the electromagnetic valve power to the electromagnetic valves.

Abstract: Systems and methods described herein provide for pressure relief valve detection and monitoring. A valve assembly includes a striker and an indicator assembly separated by a diaphragm. The diaphragm may be elastically or permanently deformable. The striker may be connected to a relieve valve disk that releases in response to high fluid pressure at the valve. Movement of the striker may be detected by contact with the diaphragm or by sensors near the diaphragm, which may trigger the indicator assembly to provide an external indication of a valve opening.

Abstract: The subject matter of this specification can be embodied in, among other things, an actuator that includes a piston configured to actuate relative to a housing, a sensor rod configured to be actuated by the piston, a sensor affixed to the housing and configured to detect a piston position of the piston relative to the housing based on a sensor rod position of the sensor rod relative to the sensor, and a linkage configured to couple the sensor rod to the piston, and to offset a change to the sensor rod position due to a temperature-induced dimensional change to at least one of the housing, piston, the sensor rod, and the sensor.

Abstract: A hydraulic component for vehicles, such as for maritime applications, is a hydraulic cylinder-piston unit. The piston of the hydraulic component has a piston rod with a measurement section. A magnetic rod in the piston rod extends over the measurement section. The magnetic rod has a helically varied magnetic field direction. The hydraulic component includes a sensor device having a scanning region measuring the field direction. The sensor device is arranged such that, over the entire stroke path of the piston, at least a part of the magnetic rod is located in the scanning region. The sensor device has a sensor unit configured to transmit measurement results for the field direction to a processing unit, configured to process and output the measurement results. Furthermore, the present invention relates to a hydraulic adjustment system having at least one hydraulic component and a vehicle having at least one hydraulic adjustment system.

Abstract: An electronic pull-out faucet includes a faucet body, a pull-out hose, a pull-out spray head, a solenoid valve, and a magnetic switch assembly. A magnet of the magnetic switch assembly is fitted to an outlet end of the pull-out hose. Compared with the prior art, there is no need for the pull-out hose to be a two-section hose for installing the magnet. The structure of the pull-out hose is simplified, and the assembly is simpler.

Abstract: A check valve includes an upper housing defining an inlet of the check valve, and a lower housing having a seating portion and defining an outlet of the check valve. The check valve further includes a chamber interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet, and a flexible diaphragm mounted in the chamber. The flexible diaphragm selectively permits fluid flow in a first direction, and prevents fluid backflow in a second direction opposite to the first direction. The flexible diaphragm includes a color changing material, and when the flexible diaphragm is seated on the seating portion and bent due to force of the fluid flowing in the first direction, the flexible diaphragm exhibits a color change.

Abstract: Appropriate detection of an abnormality of voltage information, which is a basis for correcting a fuel injection amount, becomes possible.

Abstract: A method for controlling field equipment can include receiving information via an interface of a control system; analyzing the information by the control system with respect to tiered well construction activities; based on the analyzing, generating a workflow that includes at least a series of tiered well construction activities; and transmitting a signal from the control system to the field equipment to control the field equipment to perform at least one of the series of tiered well construction activities.

Abstract: System for logistic monitoring, control and preservation of inventory stocks of goods while they are transported by air, sea, land and/or kept in depository sites, through the processing of staggering coded commands, received remotely through wireless telemetry actions, the system comprising: an inventory stock control and monitoring system, provided with status measurement sensor, electromechanical and pneumatic device, pneumatic sliding actuator device, sliding actuator engaging device, engage-release electronic control device a rechargeable battery pack unit, an electronic central unit based upon an electronic processing microcontroller with memory, and GPRS telecommunication device together with a transmit receive satellite modem; a Bluetooth wireless application software within an external unit; an electronic staggering deciphering device, based upon a Bluetooth receiver, connected to the electronic central unit.

Abstract: A position detection sensor includes a rod-shaped contact part having a distal end and a proximal end, the contact part being configured such that an outer peripheral surface thereof at the distal end contacts an object and the contact part pivots about the proximal end in accordance with displacement of the object; a movable part configured to move with a pivot of the contact part; and a magnetic switch configured to sense a presence of the movable part and detect a position of the object when the movable part moves to approach a predetermined distance. The contact part is elastic and includes a columnar outer member constituting an outer peripheral portion of the contact part and a rod-shaped inner member inserted in the outer member and having an elastic modulus larger than that of the outer member.

Abstract: According to one aspect, a master control module controlling multiple valve assemblies on a marine vessel may include a receiver, an input component, a processor, and a transmitter. The receiver may receive positional status signals from corresponding individual control modules. Each positional status signal may be indicative of a positional status of a valve assembly corresponding to a respective individual control module. The input component may receive a command pertaining to one or more of the valve assemblies, including a desired flow characteristic and/or a desired time. The processor may generate control signals for the valve assemblies in accordance with the desired flow characteristics. The transmitter may transmit the control signals to the respective individual control modules to effectuate the desired flow characteristic accordingly.

Abstract: A device for measuring a state of a valve may include a housing configured to connect to a handle of a valve or a body of a valve, a sensor supported on one of the housing or the valve stem, and an indicator detectable by the sensor. The indicator may be configured to move relative to the sensor in response to movement of a valve stem or valve handle during opening and closing of the valve. The sensor may be configured to detect a position of the indicator to determine a state of the valve. Related systems and methods are also described.

Abstract: A method of controlling a gas furnace comprising a gas valve for supplying a fuel gas to a manifold; a burner through which the fuel gas discharged from the manifold passes; an igniter for igniting a mixture of fuel gas passed through the burner and air; and an inducer for generating a flow in which a combustion gas generated by the burning of the mixture is discharged to an exhaust pipe via a heat exchanger, wherein the gas furnace performs a heating operation according to a heating signal or a heating stop according to a stop signal, includes the steps of: (a) receiving any one of the heating signal or the stop signal; (b) transmitting a signal to operate the inducer when the heating signal is received; (c) operating the igniter; (d) transmitting a signal to open the gas valve; (e) detecting whether the gas valve is opened or closed; (f) detecting a flow rate of the fuel gas in the manifold; and (g) displaying a normal operation of the heating operation, based on information detected in the steps (e) and (f

Abstract: A valve system includes a housing that houses a fluid path having an inlet side and an outlet side, and a fluid purge port disposed at and in fluid communication with the outlet side of the fluid path. The housing includes: an inlet valve disposed in fluid communication with the fluid path at the inlet side and in operable communication with an inlet gear; an outlet valve disposed in fluid communication with the fluid path at the outlet side and in operable communication with an outlet gear; and a control gear disposed in operable communication with both the inlet gear and the outlet gear.

Abstract: A pressure relief valve may comprise a housing, a disk, and a seal. The disk may be configured to deflect relative to the housing. The seal may form a sealing interface with at least one of the housing or disk. The pressure relief valve may be coupled to an inflatable slide or an aspirator.

Abstract: A method for monitoring health of a valve is presented. The method includes receiving an acoustic emission signal from a sensing device operatively coupled to the valve, selecting a region of interest signal in the acoustic emission signal, determining a plurality of current parameters based on the region of interest signal, and monitoring the health of the valve based on at least the plurality of current parameters, wherein the region of interest signal comprises acoustic emission data generated from initiation of an opening of the valve until the valve is partially opened.

Abstract: An electrohydraulic valve system for controlling a braking system of a work machine includes a valve body forming a bore and a fluid channel, a valve spool disposed within the bore, and a first armature positioned with respect to the valve spool to move the valve spool axially within the bore between a first position and a second position. A spring is disposed within the bore, where the valve spool is biased to its first position by the spring. A first electromagnetic coil is operably controlled between an energized state and a de-energized state, and a lockout system is formed at least partially within the valve body. The lockout system includes a second armature, a second electromagnetic coil, and a lockout spring, where the second electromagnetic coil is operably controlled between an energized state and a de-energized independently of the first electromagnetic coil.

Abstract: A method for producing a cavity in a substrate composed of hard brittle material is provided. A laser beam of an ultrashort pulse laser is directed a side surface of the substrate and is concentrated by a focusing optical unit to form an elongated focus in the substrate. Incident energy of the laser beam produces a filament-shaped flaw in a volume of the substrate. The filament-shaped flaw extends into the volume to a predetermined depth and does not pass through the substrate. To produce the filament-shaped flaw, the ultrashort pulse laser radiates in a pulse or a pulse packet having at least two successive laser pulses. After at least two filament-shaped flaws are introduced, the substrate is exposed to an etching medium which removes material of the substrate and widens the at least two filament-shaped flaws to form filaments. At least two filaments are connected to form a cavity.

Abstract: A valve without position indicating switches. Positions of the valve are detected from current magnitude measurements and current profile analytics. The current profile may be learned initially and relearned and adapted at each operation. The valve may be opened and closed by a driver that is actuated by an electrical current to control the opening and closing of the valve. The current may be regulated by a controller to open and close the valve appropriately.

Abstract: A flow channel assembly (200) of a fluid micro-injection device has a fluid seat (210), a nozzle mounting plate (240), a nozzle (220), a nozzle platen (250) and a fluid supply joint (230). The nozzle (220) is connected to the fluid seat (210) by the nozzle mounting plate (240). The nozzle platen (250) is connected with the nozzle mounting plate (240) to secure the nozzle (220). The fluid supply joint (230) and the fluid seat (210) are connected to control the fluid flowing to the nozzle (220).

Abstract: Systems and methods described herein provide for pressure relief valve detection and monitoring. A valve assembly includes a striker and an indicator assembly separated by a diaphragm. The diaphragm may be elastically or permanently deformable. The striker may be connected to a relieve valve disk that releases in response to high fluid pressure at the valve. Movement of the striker may be detected by contact with the diaphragm or by sensors near the diaphragm, which may trigger the indicator assembly to provide an external indication of a valve opening.

Abstract: A pressure test apparatus is provided for performing a pressure test on a part. The method of pressure testing the includes attaching the part to the pressure test apparatus and moving down a top plate assembly of the pressure test apparatus, where the moving down of the top plate assembly engages a connection to a transducer for the pressure test and blocks a connection to an air supply to the pressure test apparatus. Furthermore, the method includes measuring a level of pressure in the part.

Abstract: A position transfer device is configured for use on a control valve. These configurations may convert a linear position of a closure member on the control valve to an angular position of magnets. A sensor in proximity to the magnets can generate a signal in response to the angular position. A valve positioner or controller can process the signal to identify the position of the closure member relative to a seat. In one implementation, the position transfer device includes a shaft that clamps onto a pin. This arrangement causes the pin to translate radially about an axis that is perpendicular to the shaft. The magnets move in response to the pin.

Abstract: Apparatus and method provide a solenoid coil having a field-replaceable status indicator light, such as an LED. The status indicator light lights up when power is supplied to the solenoid coil to indicate the coil is energized and turns off when the coil is no longer energized. This allows technicians and other personnel working in hazardous environments to easily and reliably monitor the operational status of the solenoid coil. An electrical splitter adapter splits power between the solenoid coil and the status indicator light. The splitter adapter allows the status indicator light to be removed without interrupting power to the solenoid coil. Where the power is AC power, a rectifier may be provided on the splitter adapter to convert the AC power to DC power.

Abstract: A cleaning unit (38) for supplying a cleaning liquid to a beverage dispensing system, in which the cleaning unit (38) comprises a first inlet (36) for receiving a pressure fluid, a second inlet (44) for receiving a cleaning liquid, an outlet (42) for supplying the cleaning liquid to a discharge valve of the beverage dispensing system, and a drive mechanism for forcing the cleaning liquid from the second inlet (44) to said outlet (42) by using the pressure fluid received at the first inlet.

Abstract: A method of adjusting stroke end positions of a process control valve is provided. A valve control mechanism is set up to continuously determine an actual position value from a travel-measurement system value acquired by a travel-measurement system, taking a first travel-measurement system final value and a second travel-measurement system final value into account. The method comprises the recognition of a first stroke end position when the process control valve is fully closed, and the recognition of a second stroke end position when the process control valve is fully open. The method further comprises the storage of the travel-measurement system value corresponding to the first stroke end position as the first travel-measurement system final value, and the storage of the travel-measurement system value corresponding to the second stroke end position as the second travel-measurement system final value.

Abstract: A method for determining the degree of wear of a valve, the degree of wear of the valve being dependent on the degree of wear of an operating element that is made of an expandable material and performs a mechanical movement each time the temperature changes, the change in temperature resulting in wear, the operating element made of an expandable material being mechanically connected to a piston; the movements of the operating element (3) made of an expandable material are calculated by initially sensing the change in temperature on the operating element (3), whereupon the changes in temperature are recalculated as movements on the basis of the temperature/expansion curve applicable to the operating element (3) made of an expandable material.