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 diagnosis method for continuous function monitoring of a process valve during normal operation. The diagnosis method includes the steps of determining process set data (S) with discrete-time process set values from an input signal supplied to the process valve, b) determining process actual data (s) with discrete-time process actual values using a displacement-measurement system assigned to the process valve, and c) analyzing the process actual data (s) dependent on the process set data (S) by comparing the process set data (S) and the process actual data (s) with each other to detect defined error states.

Abstract: A diaphragm control valve includes a diaphragm valve and a valve control. The diaphragm valve includes a valve housing having a flow channel, a diaphragm, and an actuator. The valve control comprises an actuating element. The valve control comprises a correction element and provides a plurality of predefined correction characteristic lines. The valve control is arranged such that a user can select one of the correction characteristic lines, and the correction element along with the selected correction characteristic line determines a corrected position set value from a preset position set value. The actuating element is configured to determine a manipulated variable from the corrected position set value and to control the actuator using the manipulated variable such that the diaphragm control valve has a predetermined diaphragm control valve characteristic line.

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 diaphragm control valve includes a diaphragm valve and a valve control. The diaphragm valve includes a valve housing having a flow channel, a diaphragm, and an actuator. The valve control comprises an actuating element. The valve control comprises a correction element and provides a plurality of predefined correction characteristic lines. The valve control is arranged such that a user can select one of the correction characteristic lines, and the correction element along with the selected correction characteristic line determines a corrected position set value from a preset position set value. The actuating element is configured to determine a manipulated variable from the corrected position set value and to control the actuator using the manipulated variable such that the diaphragm control valve has a predetermined diaphragm control valve characteristic line.

Abstract: A method of controlling a valve plunger of a valve makes provision that, prior to the operation, the valve individually runs through a set-up procedure on the basis of a detected closed position, in which set-up procedure the valve plunger exerts an additional force in the direction of the valve seat beyond a detected closed position. The corresponding valve is equipped with an integrated valve controller which performs a corresponding set-up procedure automatically prior to the operation.

Abstract: A valve actuator for a valve has an electric motor which comprises a rotor and a stator, and further a magnetic detent brake with at least one detent magnet for holding the rotor in a detent position. The least one rotor magnet is arranged on the rotor and co-operates with the detent brake.

Abstract: A pneumatic drive and a method for acquiring the power of a pneumatic drive are specified. A piston is movably disposed in a working space and coupled to a path transducer. A pressure sensor is provided for acquiring an internal pressure of the working space. An evaluation unit of the pneumatic drive is adapted to process the value of a path distance of a movement of the piston acquired by the path transducer as well as a variation of the internal pressure in the working space acquired by the pressure sensor. The variation of the internal pressure is associated with the movement of the piston in the working space. Based on these values, a power of the pneumatic drive can be determined.

Abstract: A linear valve drive for connection to a valve body having a valve seat and at least one flow passage with at least one inlet and at least one outlet, comprises a drive housing with a drive unit accommodated therein, an actuating element axially shiftable by the drive unit and coupled with a valve closing element to be pressed against the valve seat, and optionally closing the flow passage, and a supporting unit surrounding the actuating element, which is designed to be attached to the valve body. A spring system loaded by actuating the linear valve drive is provided at the supporting unit, which in dependence on the compression path has different spring rates. Furthermore, a correspondingly equipped valve is described.

Abstract: A method of controlling a valve plunger of a valve makes provision that, prior to the operation, the valve individually runs through a set-up procedure on the basis of a detected closed position, in which set-up procedure the valve plunger exerts an additional force in the direction of the valve seat beyond a detected closed position. The corresponding valve is equipped with an integrated valve controller which performs a corresponding set-up procedure automatically prior to the operation.

Abstract: A method and a device for open-loop or closed-loop control of a process uses an actuator, a position sensor, a process valve, a process sensor, and a tuning stage. n positions of the process valve are approached, and the associated actual position values are detected. The respective actual process values are detected for each corresponding actual position value to thus obtain value pairs of actual position values and actual process values. Correction values are calculated based on the identified value pairs, and position set values corrected with the correction values are determined to compensate for nonlinearities of the process, such that a linear overall behavior is achieved.

Abstract: A linear valve drive for connection to a valve body having a valve seat and at least one flow passage with at least one inlet and at least one outlet, comprises a drive housing with a drive unit accommodated therein, an actuating element axially shiftable by the drive unit and coupled with a valve closing element to be pressed against the valve seat, and optionally closing the flow passage, and a supporting unit surrounding the actuating element, which is designed to be attached to the valve body. A spring system loaded by actuating the linear valve drive is provided at the supporting unit, which in dependence on the compression path has different spring rates. Furthermore, a correspondingly equipped valve is described.

Abstract: A valve actuator for a valve has an electric motor which comprises a rotor and a stator, and further a magnetic detent brake with at least one detent magnet for holding the rotor in a detent position. The least one rotor magnet is arranged on the rotor and co-operates with the detent brake.

Abstract: A pneumatic drive and a method for acquiring the power of a pneumatic drive are specified. A piston is movably disposed in a working space and coupled to a path transducer. A pressure sensor is provided for acquiring an internal pressure of the working space. An evaluation unit of the pneumatic drive is adapted to process the value of a path distance of a movement of the piston acquired by the path transducer as well as a variation of the internal pressure in the working space acquired by the pressure sensor. The variation of the internal pressure is associated with the movement of the piston in the working space. Based on these values, a power of the pneumatic drive can be determined.

Abstract: A method of manufacturing a metallic valve housing by hydroforming a tube section in a die is provided. The die includes an upper part having a stamp and a lower part having a depression. The tube section is placed in the die, filled with a liquid, and subjected to a high internal pressure. Opposite walls of the tube section in a middle portion between two tube ends is shaped in that one side of the tube section is pressed inwards transversely to the axis of the tube section by the stamp to form a concave curvature, and the opposite wall is pressed into the depression in the lower part to form a flat.

Abstract: A display apparatus which comprises an image module for generating an image, a spectacle-like frame which carries the image module, and wherein the spectacle-like frame comprises a front portion with a nose support, as well as two lateral temples mounted to the front portion. At least one of the temples has shiftably mounted to it a holding element. The holding element comprises a first portion extending downwards from the temple, and a second portion connected with the lower end of the first portion, the second portion extending from the lower end of the first portion in a direction pointing away from the front portion.

Abstract: A method of manufacturing a metallic valve housing by means of hydroforming a tube section in a die including an upper part having a stamp, a lower part having a depression, the tube section being placed in the die, filled with a liquid, and subjected to a high internal pressure, and opposite walls of the tube section in a middle portion between two tube ends being shaped in that one side of the tube section is pressed inwards transversely to the axis of the tube section by means of the stamp to form a concave curvature and the opposite wall is pressed into the depression in the lower part to form a flat.

Abstract: A arrangement serves for the adjustment of an optical element (1), in particular of a lens in an optical system, in particular in a projection lens system for semiconductor lithography. The optical element (1) is mounted in a mount (3) by means of a number of bearing feet (2) distributed over the circumference of the optical element (1) and is selectively deformable by actuators (5). At least some of the bearing feet (2) are engaged by the actuators (5) in a region of the respective bearing foot (2) in such a way that the respective bearing foot (2) can be displaced in the direction of the optical axis (7).

Abstract: An HMD device has an imaging optic for the right eye and an imaging optic for the left eye. Each imaging optic so images an image, which is generated in the object plane, that the image can be observed by a user in an image plane and each of the imaging optics includes an optical element (23) and a deflecting element (25) mounted downstream of the optical element (23). An image transducer (24) and the optical element (23), which follows the image transducer (24), are held by a linearly guided receptacle frame (15) moveable via a drive unit. A linear movement in the direction of an optical axis takes place. Adjusting wheels (4, 5) are mounted on respective sides of the image window for the right and left eyes. Each of the adjusting wheels (4, 5) is coupled mechanically to a corresponding cam curve. Each cam curve translates a rotational movement of the adjusting wheel (4, 5) into an output end linear movement of the receptacle frame (15).

Abstract: A display apparatus which comprises an image module for generating an image, a spectacle-like frame which carries the image module, and wherein the spectacle-like frame comprises a front portion with a nose support, as well as two side arms mounted to the front portion. At least one earphone is mounted to the frame via a positioning mechanism. The earphone can be positioned in front of an ear of a user by means of the positioning mechanism, when the display apparatus is mounted on the user's head. The positioning mechanism comprises a linear guide which is mounted to the frame via a hinge joint and the earphone is positioned at the end of the linear guide, turned away from the hinge joint.