Abstract: A control valve for controlling liquid flow in a heating and/or cooling installation. The control valve includes differential pressure regulating facilities and flow area regulating facilities. The control valve is provided with means for manually presetting a maximum flow through area and with means for automatically adjusting the flow through area within the preset maximum.

Abstract: A control valve for controlling liquid flow in a heating and/or cooling installation under command from an actuator within a range defined by a manually preset maximum. The control valve includes differential pressure regulating facilities and flow area regulating facilities. The control valve is provided with means for manually presetting a maximum flow through area and with means for automatically adjusting the flow area through area within the preset maximum.

Abstract: A valve with a valve housing for controlling the liquid flow in a plant for central heating is provided. The valve includes an insert part with valve parts for controlling a liquid flow through the valve: a first part and a second part being mutually rotatable. The first and the second parts are provided with complementary through-flow openings that combine to define a common opening area and are configured such that, upon mutual rotation of those valve parts, a larger or a smaller total opening area is provided. The valve includes a closure part which is disposed such that, upon axial displacement, the closure part is capable of completely or partially closing off the total opening area through the through-flow openings.

Abstract: A control valve (1) for controlling liquid flow in a heating and/or cooling installation.

Abstract: A control valve (1) for controlling liquid flow in a heating and/or cooling installation under command from an actuator. The control valve (1) comprises a flow regulator with a first annular valve member (20) and a second annular valve member (40) that have an axial overlap. The first valve member (20) is manually rotatable relative to the second valve member (40). The axially overlapping portions of the valve members (20,40) define a first inlet opening (52) with a variable circumferential extent and a second inlet opening (53) with a variable circumferential extent. The first inlet opening (52) is axially offset relative to the second inlet opening (53). A third valve member (24) is axially displaceable by the actuator relative to the first- and second inlet openings (52,53) and defines a first control edge (26) associated with the first inlet opening (52) and defines a second control edge (27) associated with the second inlet opening (53).

Abstract: A detachable handle for adjusting a valve by rotation of a rotatable adjustment element. The handle is provided with a body including a front side having an angular scale, an opposite rear side and a circumferential gripping face. The handle is also provided with a coupling element configured to detachably and operably connect to the rotatable adjustment element. At least a portion of the body along an edge of the angular scale is transparent or open so that an operator can see through the portion of the body. An assembly of a valve and the detachable handle is also provided. The valve is provided with a rotatable adjustment element for adjusting the valve. The valve has a face from which the rotatable adjustment element protrudes. This face is provided with a fixed marker.

Abstract: The invention relates to a valve with a valve housing, in particular for controlling the liquid flow in a plant for central heating. The valve comprises an insert part with valve parts for controlling a liquid flow through the valve: a first part and a second part being mutually rotatable. The first and the second parts are provided with complementary through-flow openings that combine to define a common opening area and are configured such that, upon mutual rotation of those valve parts, a larger or a smaller total opening area is provided. The valve comprises a closure part which is disposed such that, upon axial displacement, it is capable of completely or partially closing off the total opening area through the through-flow openings.

Abstract: A detachable handle for adjusting a valve by rotation of a rotatable adjustment element. The handle is provided with a body including a front side having an angular scale, an opposite rear side and a circumferential gripping face. The handle is also provided with a coupling element configured to detachably and operably connect to the rotatable adjustment element. At least a portion of the body along an edge of the angular scale is transparent or open so that an operator can see through the portion of the body. An assembly of a valve and the detachable handle is also provided. The valve is provided with a rotatable adjustment element for adjusting the valve. The valve has a face from which the rotatable adjustment element protrudes. This face is provided with a fixed marker.

Abstract: The invention relates to a valve system, in particular for controlling the liquid flow in a plant for central heating. The system may comprise one or more valve housings with at least two associated distinct inserts having different flow characteristics. The inserts comprise two types of means with regulable openings that serve as inlet and outlet, respectively, said means being provided with means for regulating the liquid flow, the differential pressure over the openings of that first means being changeable, whereby the area of the openings of the other means is changed to the effect that the differential pressure is regulated. The inserts are furthermore provided with means for the applied change in area by means of an activator that comprises an end which is exposed to the surroundings. A programmable regulator unit provided with motor can be coupled to the end of an activator on the insert.