Abstract: A position sensor for an actuator having a measuring shaft capable of pivoting less than, for example, 360° around a pivot axis. The position sensor can include an angle sensor to detect an actual angular position of the measuring shaft relative to a stationary reference point. The measuring shaft can include a first section extending coaxially to the pivot axis for introducing a pivotal movement to the measuring shaft corresponding to a control movement of an actuator rod, and a second section extending coaxially to the pivot axis to which a measuring shaft-based angle sub-sensor can be attached.

Abstract: An electropneumatic positioner for a pneumatic actuator to operate a control device of a processing plant can include two modular pneumatic slots and a pneumatic control output. The two modular pneumatic slots can engage with a respective modular pneumatic component. The two pneumatic slots and the pneumatic components can be modularly matched to one another such that their respective pneumatic interfaces merge into one another when a pneumatic slot is engaged. The pneumatic control output can output a pneumatic control pressure signal to the pneumatic actuator. The two modular pneumatic slots and the pneumatic control output can form a pneumatic series connection.

Abstract: A self-operated regulator for controlling a stream of working fluid particularly of a processing plant, comprising a control valve and a control actuator configured to receive supply energy for the provision of an operating force exclusively from the stream of working fluid and/or from the working fluid for operating the control valve, characterized by a magnetic field source coupled to the control valve such that it follows the movement of the control valve for determining the movement thereof by means of a magnetic sensor for detection of the position of the control valve.

Abstract: In a fluid-operated drive for a field device, the drive being designed to set a control valve of the field device, a fluidically operated basic drive is provided with a basic working chamber loaded fluidically and delimited by a basic drive housing part and by a basic actuating piston guided in the basic drive housing part. At least one supplementary drive is provided with a supplementary working chamber loaded fluidically and delimited by a supplementary drive housing part. The basic drive housing part and the supplementary drive housing part are displaceable in one another in accordance with a piston and chamber arrangement so that a volume of the supplementary chamber changes in the event of a relative movement of the drive housing parts.

Abstract: The position controller for a pneumatic field device comprises a current-pressure transducer system having at least two I/P-transducers creating separate pneumatic control signals. Microelectronics creates at least two electrical control signals for the I/P-transducers. A pneumatic signal switching valve has at least two pneumatic inputs for the at least two pneumatic control signals, a pneumatic output for transferring a pneumatic control signal to a working chamber of the pneumatic field device and an electrical switch signal input. The pneumatic signal switch valve comprises a first switch position which blocks a first of the at least two pneumatic control signals and a second switch position which blocks a second of the pneumatic control signals.

Abstract: An electropneumatic solenoid valve for a pneumatically-actuated field device can include air channels, a flapper valve member, an electromagnetic controller, and a spring. An air supply channel, air dispensing channel and air exhaust channel can be mound into an air chamber. The flapper valve member can include a closure element arranged on an axial control direction and be engageable with a delimitation interior wall mouth of one of the air channels such that the flapper valve member is arranged with a circumferential axial distance to the delimitation interior wall. The electromagnetic controller can displace the flapper valve member in the axial control direction to ventilate/exhaust the air dispensing channel. The spring can bias the flapper valve member into a closed position to close closing the one of the air channels. The flapper valve member can be float-mounted in an unguided configuration except for spring within the air chamber.

Abstract: An electropneumatic magnet valve for a pneumatically actuated field device can include a valve member, an electromagnetic controller, a magnet valve member, and an activator. The valve member can be moveable between at least two operating positions for ventilating and/or exhausting a magnet valve exit. The electromagnetic controller can move the valve member between the operating positions. The magnet valve member operator can move, additionally with respect to the electromagnetic controller, the valve member independently of an operation of the electromagnetic controller. The valve member operator can include an activator to selectively generate/provide a magnetic field for contact free operation of the valve member via which the magnet valve member operator is changeable between a passive operating condition and an active operating condition.

Abstract: A pneumatic volume booster to amplify a control pressure output signal can include a pneumatic control outlet for attachment to a pneumatic working chamber of the pneumatic actuator; a pneumatic aeration inlet configured to receive the pneumatic control pressure signal from the position controller, a pneumatic amplification inlet configured to receive a constant pneumatic air amplification signal, a pneumatic de-aeration connection from the control outlet to a pressure sink configured to aerate the control actuator, a deaerator seat-valve separating and/or opening the pneumatic de-aeration connection, a pneumatic aeration connection between the first aeration inlet and the control outlet; an aerator seat-valve separating and/or opening the pneumatic aeration connection, a pneumatic amplification connection between the amplification inlet and the control outlet; an amplification seat-valve separating and/or opening the pneumatic amplification connection; and a mechanical seat-valve-operator for commonly operat

Abstract: A sleeve shaped valve cage for receiving a valve member is described. The valve cage can guide the valve member relative to the valve cage. The valve cage can include a throttle section configured to provide pressure-reduced flow rates of the processing fluid, the throttle section having multiple throttle conduits extending from an inside of the valve cage to an outside of the valve cage; a high capacity flow section adjacent to the throttle section in the displacement direction, the high capacity flow section configured to provide increased flow rates of the processing fluid; and at least one equalization channel formed in the valve cage and extending from the inside to the outside of the valve cage, the at least one equalization channel leading from the high capacity flow section to the throttle section such that, before the valve member releases all throttle conduits, the equalization channel is released.

Abstract: A control valve configured to set a process fluid stream of a processing plant can include a valve housing, a valve component, an annular-groove-shaped seal reception, and a seal. The valve housing can include an inlet, an outlet and an aperture extending between the inlet and the outlet along a longitudinal axis. The valve component can be mounted on the valve housing and can be a valve seat and/or a valve cage. The annular-groove-shaped seal reception can be confined by the valve component and the valve housing. The seal can be fit into the seal reception. The valve component and the valve housing can each form a respective ledge protruding in a radial direction to define the annular-groove-shaped seal reception. The ledges can each be configured to confine the seal reception in a respective axial direction.

Abstract: In a positioning device for a processing plant, a valve is provided comprising a valve housing, a valve seat, and a valve member actuated by use of a lead-through opening in the valve housing. A top is provided for screwing on the lead-through opening and for rigidly coupling the valve housing to an actuator. A deformation buffer is arranged or formed on mutually opposite respective screw stop surfaces of the top and of the valve housing and which is deformed in a predetermined manner when screwing the top on the lead-through opening.

Abstract: In a method or device for quantifying a leakage flow on a process control valve, an intact reference control valve is used to determine several reference flow values in advance by placing the reference control valve in several reference opening positions and measuring the respective reference flow value for each of the reference opening positions. When determining the respective reference flow value, a reference mechanical vibration acquired in an environment of the reference control valve is allocated to the respective reference flow value. An instantaneous mechanical vibration is determined on the process control valve when it is closed. The reference mechanical vibration coming closest to the determined instantaneous mechanical vibration is identified by an identity or approximation comparison. The leakage flow is equated with the reference flow value allocated to the identified reference mechanical vibration.

Abstract: An apparatus and method for closed-loop-control of a fluid conveying system that include at least one pump, at least one consumer, at least one controller valve, and at least one armature as an actuator of the at least one control valve. Pressure and volume flow rate of the consumer are controlled independently of each other by a decoupling controller.

Abstract: An electro-pneumatic actuator, such as a positioner or an I/P transducer array, for a field device of a processing plant, such as a brewery, a petrochemical plant or the like, can include a pneumatically operated display configured to visually and/or acoustically display at least one field device-specific operating information. The information can include a drive or valve position, or a regulating variable. The electro-pneumatic actuator can be configured to output at least one pneumatic drive actuating signal to a pneumatic drive so as to set a final controlling device, such as a control valve, of the field device. The electro-pneumatic actuator can be configured to output at least one pneumatic display actuating signal to the pneumatically operated display, which can differ from the pneumatic drive actuating signal.

Abstract: In a electropneumatic field device, an electrical field input and a pneumatic supply input are provided. At least one field output is provided at which a field output signal is output based on a field control signal received via the electrical field input. A group comprising at least two modular components of different functionality is provided and at least one modular slot for occupation with either of said modular components from said group. The at least two modular components of the group and the at least one slot are modularly adapted to one another such that interfaces of the slot and interfaces of either of said modular components in the seat merge into one another when the slot is occupied with either of said modular components so that the modular component which is in the slot is connected to the electrical field input and to the at least one field output.

Abstract: In a method or device for operating a pneumatic drive system for actuating a control valve, a pneumatic working chamber is loaded with pneumatic pressure in order to move the control valve into a desired position. At least two pneumatic control signals are supplied to the working chamber by means of electropneumatic conversion.

Abstract: A field device that includes a primary valve, a main actuator, a bypass line, a secondary valve, and a position controller. The primary valve can be configured to adjust a process fluid flow. The main actuator can be configured to control the primary valve. The main actuator includes a working chamber to be subjected with a process fluid and a return device configured to bias the valve member. The bypass line can be configured to fluidly connect an inlet and an outlet of the primary valve to feed the process fluid to the working chamber. The position controller configured to control a pneumatic actuator to control the secondary valve to change a process fluid pressure in the working chamber. The controlling of the pneumatic actuator can include generating a pneumatic control signal based on a position of the primary valve and supplying the pneumatic control signal to the pneumatic actuator.

Abstract: In a torsional moment and angle sensor for determining a torsional moment to be transferred from a drive member to a driven member, an at least partially circumferential drive side encoder ring section is provided. A contactless sensor scans the drive side encoder ring section. A driven side encoder ring section is provided via which an angular position of the driven member is scanned. The sensor for scanning the drive side encoder ring section is coupled to the drive side encoder ring section via a torsion spring bridge having a predetermined torsional elasticity.

Abstract: In a fluid-operated drive for a field device, the drive being designed to set a control valve of the field device, a fluidically operated basic drive is provided with a basic working chamber loaded fluidically and delimited by a basic drive housing part and by a basic actuating piston guided in the basic drive housing part. At least one supplementary drive is provided with a supplementary working chamber loaded fluidically and delimited by a supplementary drive housing part. The basic drive housing part and the supplementary drive housing part are displaceable in one another in accordance with a piston and chamber arrangement so that a volume of the supplementary chamber changes in the event of a relative movement of the drive housing parts.

Abstract: In a spring body for a force transducer built into a force-transmitting part, a force-input section is provided for receiving a force, a force-output section for transmitting the force, and an elastic deformation body arranged therebetween which couples the force-output section to the force-input section such that the force received by the force-input section is transmitted to the force-output section. The elastic deformation body performs a predetermined elastic deformation movement caused by the force to be transmitted at at least one point. A coding sampling section is provided at the at least one point of the deformation body and which follows deformation movements of the at least one point.