Alfa Laval Corporate Ab

Alfa Laval Kolding A/s

Jens Folkmar Andersen

Kenneth Rehhoff

Karsten Schack Madsen

Johnny Ebsen

Otto Jensen

Axel Henriksen

An actuator arrangement configured to be controlled by a control unit and to control a flow control arrangement includes a housing, a first valve stem configured to be connected to and control movement of a first valve member of the flow control arrangement, a second valve stem configured to be connected to and control movement of a second valve member of the flow control arrangement, a first electrical motor comprising a first rotor and a first stator, the first rotor being rotatable about the longitudinal axis, a second electrical motor comprising a second rotor and a second stator, the second rotor being rotatable about the longitudinal axis, wherein the first rotor is configured to provide a first movement of the first valve stem and the second rotor is configured to provide a first movement of the second valve stem. A method for moving the first valve stem is also disclosed.

Actuator arrangement and a method for moving a valve member into a cleaning position

A valve arrangement, an actuator arrangement and related methods, in which a first cleaning position is detected by mechanically transfer at least a portion of a movement of, or provided to, a first valve stem into a first movement of a second valve stem, such that a second valve member is moved towards a first conduit while the second valve member still sealingly engages a second valve seat, whereby a movement of a first valve member is detectable by a control unit by detection of the first movement of the second valve stem in a direction which extends towards the control unit.

Valve arrangement, actuator arrangement and methods of detecting a first position therein

A valve disc gasket for use in a fluid flow control valve includes a frustoconical, ring-shaped body part having a plurality of circumferentially distributed asymmetrical, through-going openings and/or slits and/or asymmetrical protrusions, wherein an internal surface of the respective asymmetrical through-going opening and/or slit forms a vane surface and/or wherein an external surface of the respective asymmetrical protrusion forms a vane surface, wherein the asymmetrical through-going openings and/or slits and/or protrusions are asymmetrical at least in the sense that respective through-going opening or slit and/or protrusion is asymmetric relative to any radial plane intersecting the respective through-going opening or slit and/or the respective protrusion. Also disclosed is a fluid flow control valve and a method for cleaning a fluid flow control valve.

Gasket, fluid flow control valve and method of cleaning such a valve

A technology is disclosed for controlling the function of a pneumatic valve actuator. The piston of the valve actuator is biased to be in first state and move to a second state when pressurized. A conduit connects the pressure side and non-pressure sides of the valve actuator for supplying the non-pressure side of the valve actuator with gas from the pressure side of the valve actuator. A control valve is connected to the conduit for controlling a release of gas from the pressure side of the valve actuator. The valve controller also has pressure-relief valve connected to the conduit between the control valve and the non-pressure side of the valve actuator for reducing the pressure in the conduit.

Control of supply of air to a pneumatic valve actuator

A method for process optimization for a valve () comprising a valve seat () arranged in a valve housing () between an inlet () and an outlet (), comprising a valve disk () which is connected to an actuating rod () and comprising an actuating device () which acts on the actuating rod (), by which means the valve disk () is brought into a closed position () for closing the valve () and is pressed onto the valve seat () and for opening the valve () is raised from the valve seat () and brought into an opening position (), wherein fluid flows through the valve () for carrying out the method in the course of cleaning, can be improved with regard to a better cleaning effect in remote regions () of the interior () of the valve housing () whereby during cleaning the valve disk () is brought into at least one intermediate position () between the closed position () and the open position ().

Method for operating a valve

In order to improve a drive arrangement () for valve devices () comprising a closing member (), comprising a movable drive element () for making an operative connection with the closing member (), pre-tensioning means for exerting a pre-tensioning force on the drive element () in order to hold the closing member () in a base position, preferably closed position, against the working forces acting on the closing member (), and driving means () to move the drive element () from the base position against the pre-tensioning force in the direction of the working forces, with a view to the disadvantages of the known drive arrangements, in particular in order to reduce the weight, it is proposed that the pre-tensioning means comprises a compressible fluid, preferably compressed air (), enclosed in a pre-tensioning container (), with a static pressure for producing the pre-tensioning force.

Growing community of inventors

Fredericia, Denmark

Jens Folkmar Andersen