Abstract: A valve for adjusting a fluid flow. The valve includes a valve body, a flow having an inlet and an outlet located downstream of the inlet, a flow adjustment arrangement for adjusting the flow of liquid from the inlet to the outlet, wherein liquid upstream of the flow adjustment arrangement but downstream of the inlet has an upstream pressure, and liquid downstream of said flow adjustment arrangement but upstream of the outlet has a downstream pressure, a stationary differential pressure sensor configured to measure a pressure difference between the upstream pressure and the downstream pressure, and a pair of pressure ports for enabling temporary connection of a non-stationary differential pressure sensor for measuring the pressure difference between the upstream pressure and the downstream pressure. Also a method for use with such a valve.

Abstract: A measurement module for measuring the differential pressure between a first and second connection point arranged in a transport line for a fluid. The measurement module includes a first connection line and a second connection line, a differential pressure sensor arranged in fluid communication with said first and second connection line, and a valve arranged in fluid communication with said first and second connection line, wherein compared to said valve, said differential pressure sensor is arranged closer to the first and second connection point.

Abstract: An actuator for controlling a valve having a valve rod is provided. The actuator includes a manual override arrangement for manually moving the actuator spindle, the manual override arrangement including a locking element, an actuator spindle holder housing at least a portion of an actuator spindle. A guiding arrangement is adapted to guide the actuator spindle along the actuator spindle holder. In a normal operating mode the actuator spindle holder is locked to the locking element, and the actuator spindle is guidable along the actuator spindle holder via the guiding arrangement. In a manual override operating mode, the actuator spindle holder is unlocked from the locking element, and the actuator spindle holder is rotatable together with the actuator spindle via the guiding arrangement.

Abstract: A measurement module for measuring the differential pressure between a first and second connection point arranged in a transport line for a fluid. The measurement module includes a first connection line and a second connection line, a differential pressure sensor arranged in fluid communication with said first and second connection line, and a valve arranged in fluid communication with said first and second connection line, wherein compared to said valve, said differential pressure sensor is arranged closer to the first and second connection point.

Abstract: A method for valve type recognition of a valve connected to an actuator, said valve being one of a first valve type and a second or further valve type. The actuator includes an actuator spindle which can be operatively connected to a valve rod. If the maximum allowable stroke of the actuator spindle is the same, or smaller than, a reference value then it is determined that the valve connected to the actuator is of the first valve type. If the maximum allowable stroke is larger than said reference value, the valve is determined to be of the second valve type. An actuator is provided for use in such a method.

Abstract: A valve for controlling fluid flow. The valve includes a valve body, a chamber arranged inside of the valve body, a fluid inlet for providing fluid to the chamber, and a fluid outlet for receiving fluid from the chamber. The valve further includes a closing arrangement for controlling the flow of fluid from the fluid inlet to the fluid outlet via the chamber, and a differential pressure sensor for measuring the differential pressure over the closing arrangement, between an upstream pressure and a downstream pressure. The differential pressure sensor is integrated in the valve body, and is arranged to measure the differential pressure for at least an open state of the closing arrangement.

Abstract: The present invention relates to a valve having a control function and a method for controlling a valve in a fluid conduit in order to adapt flow rates and/or differential pressure rates. The valve comprises a fluid inlet and a fluid outlet and a valve closing member located inside a valve body. The valve closing member is operationally connected to a variable volume chamber, which is adapted to extract energy from the fluid in order to provide either an opening or a closing displacement of the valve closing member such that the degree of opening of the valve can be changed. The supply of fluid to and from the variable volume chambers may be regulated by electronically controlled valves.

Abstract: A valve having a balancing function for a fluid distribution system. A valve closing member is movable between a closed position and a fully opened position. An actuation device is provided for changing the position of the valve closing member. A control unit is provided and includes an electronic memory adapted to receive and store an opening limitation value, the opening limitation value being representative of a selected intermediate position between the closed position and the fully opened position of the valve closing member, wherein the control unit controls the actuation device to limit the movement of the valve closing member to positions from the closed position to the selected intermediate position. Also, a valve system and to a method of operating a valve.

Abstract: A valve for controlling fluid flow that includes a valve body and a chamber arranged inside the valve body. The chamber has a proximal chamber surface and a distal chamber surface being opposite to the proximal chamber surface. The valve further includes a fluid inlet, a fluid outlet, a valve rod and a valve plug. The valve plug and the valve rod are arranged to control fluid flow from the fluid inlet to the fluid outlet via the chamber. The valve further includes a valve insert arranged at least partly inside the chamber. The valve insert includes a proximal portion and at least two distal portions, and the valve plug is adapted to be guided through at least a part of the valve insert. At least one of the distal portions is resiliently arranged relative the proximal portion in order for the distal portions to be movable relative each other.

Abstract: A valve arrangement including: a valve inlet, a valve outlet arranged downstream of the valve inlet, a first chamber arranged directly downstream of the inlet, and a second chamber arranged between the first chamber and the valve outlet. The valve arrangement further includes a measuring nipple comprising a measuring channel for receiving a measuring device, and a closing arrangement having open positions and a closed position, wherein the closing arrangement in its closed position is configured to prevent fluid communication between the first chamber and the second chamber via the closing arrangement, and wherein the closing arrangement in its open positions is configured to allow for fluid communication between the first chamber and the second chamber via the closing arrangement.

Abstract: A method for controlling a valve actuator, a valve actuator control device and a valve actuator assembly. The method includes the steps of providing a valve actuator control device, connecting the control device to a valve actuator with a signal transmitting wire, and supplying operating power to the valve actuator from the control device. The method further includes a step of transmitting control signals from the control device to the valve actuator via the signal transmitting wire in order to control the actuator. Hereby, configuration, control and maintenance of valve actuators are facilitated.

Abstract: A method for valve type recognition of a valve connected to an actuator, said valve being one of a first valve type and a second or further valve type. The actuator includes an actuator spindle which can be operatively connected to a valve rod. If the maximum allowable stroke of the actuator spindle is the same, or smaller than, a reference value then it is determined that the valve connected to the actuator is of the first valve type. If the maximum allowable stroke is larger than said reference value, the valve is determined to be of the second valve type. An actuator is provided for use in such a method.

Abstract: A valve for controlling fluid flow that includes a valve body and a chamber arranged inside the valve body. The chamber has a proximal chamber surface and a distal chamber surface being opposite to the proximal chamber surface. The valve further includes a fluid inlet, a fluid outlet, a valve rod and a valve plug. The valve plug and the valve rod are arranged to control fluid flow from the fluid inlet to the fluid outlet via the chamber. The valve further includes a valve insert arranged at least partly inside the chamber. The valve insert includes a proximal portion and at least two distal portions, and the valve plug is adapted to be guided through at least a part of the valve insert. At least one of the distal portions is resiliently arranged relative the proximal portion in order for the distal portions to be movable relative each other.

Abstract: A control valve including a valve body, a chamber arranged inside the valve body, a fluid inlet, a fluid outlet, and a closing arrangement for regulating the flow of fluid from the fluid inlet to the fluid outlet via the chamber. The closing arrangement has a closed state in which no fluid, or only a leakage flow, is allowed to flow through the chamber, a first open state in which fluid is allowed to flow through the chamber, and at least one second open state in which a lower flow of fluid is allowed to flow through the chamber compared to when the closing arrangement is in its first open state. Between the closed state and the second open state, the closing arrangement is configured to allow fluid to flow through the chamber in accordance with a first valve characteristic function.

Abstract: An actuator for controlling a valve having a valve rod is provided. The actuator includes a manual override arrangement for manually moving the actuator spindle, the manual override arrangement including a locking element, an actuator spindle holder housing at least a portion of an actuator spindle. A guiding arrangement is adapted to guide the actuator spindle along the actuator spindle holder. In a normal operating mode the actuator spindle holder is locked to the locking element, and the actuator spindle is guidable along the actuator spindle holder via the guiding arrangement. In a manual override operating mode, the actuator spindle holder is unlocked from the locking element, and the actuator spindle holder is rotatable together with the actuator spindle via the guiding arrangement.

Abstract: A pilot valve that includes a pilot valve body including a chamber, a first fluid inlet and a second fluid inlet for providing fluid to the chamber, and a fluid outlet for receiving fluid from the chamber. The pilot valve further includes a separating element and a valve rod, the valve rod is arranged to control fluid flow from the first or second fluid inlet to the fluid outlet via the chamber. The separating element is connected to, and movable with the valve rod, and has a first fluid contacting area configured to be in fluid communication with the first fluid inlet, and a second fluid contacting area configured to be in fluid communication with the second fluid inlet and arranged on an opposite side to the first fluid contacting area. The pilot valve is at least partly controlled by a difference between a first force and a second forces acting on the first and second fluid contacting areas of the separating element.

Abstract: A pilot valve arrangement including a first and second pilot valve parts. The second pilot valve part including a second pilot valve body including a compartment, a low pressure fluid inlet for receiving fluid from the first pilot valve part, and a high pressure fluid inlet, and a fluid outlet for receiving fluid from the low pressure and high pressure inlets via said compartment and providing fluid to a piloted valve. In a first state, the second pilot valve of the pilot valve arrangement provides for a first fluid flow path within the compartment to enable the low pressure fluid inlet to be in fluid communication with the fluid outlet via the first fluid flow path. In a second state, a second fluid flow path within the compartment to enable the high pressure fluid inlet to be in fluid communication with the fluid outlet via the second fluid flow path.

Abstract: The invention relates to a valve having a balancing function for a fluid distribution system. A valve closing member is movable between a closed position and a fully opened position. An actuation device is provided for changing the position of the valve closing member. A control unit is provided and comprises an electronic memory adapted to receive and store an opening limitation value, said opening limitation value being representative of a selected intermediate position between said closed position and said fully opened position of the valve closing member, wherein the control unit controls the actuation device to limit the movement of the valve closing member to positions from said closed position to said selected intermediate position. The invention also relates to a valve system and to a method of operating a valve.

Abstract: A valve having a balancing function for a fluid distribution system. A valve closing member is movable between a closed position and a fully opened position. An actuation device is provided for changing the position of the valve closing member. A control unit is provided and includes an electronic memory adapted to receive and store an opening limitation value, the opening limitation value being representative of a selected intermediate position between the closed position and the fully opened position of the valve closing member, wherein the control unit controls the actuation device to limit the movement of the valve closing member to positions from the closed position to the selected intermediate position. Also, a valve system and to a method of operating a valve.

Abstract: A device having pressure independent control and balancing valves, suitable for use in a hydronic system, comprises a seat, a plug having an upstream surface and a downstream surface, and a piston, wherein the seat, plug and piston are aligned coaxially, a controller determines the size of a first flow restriction between the upstream surface of the plug and the seat, the piston is operable to move in response to differential pressure across the first restriction and a predetermined force, the position of the piston relative to the downstream surface of the plug determining the size of a second flow restriction thereby in use maintaining a substantially constant differential pressure across the first restriction.