Abstract: A pump unit (2) includes a first housing with at least a first electrical plug connector (12) on the outside of the first housing and a separate connector housing (16) connected to the first housing and including at least a first mating plug connector. The mating plug connector is engaged with the first electrical plug connector (12). An electrical connection terminal (42) is provided in the interior of the separate connector housing (16), which electrical connection terminal (42) is connected to the first mating plug connector and is configured for connection to one electrical cable or a plurality of electrical cables.

Abstract: A pump unit has an electrical drive motor and a control device for controlling the drive motor, wherein said control device includes at least one microprocessor and storage means which is able to store at least one control program executable by said microprocessor, wherein said control device includes or communicates with a programming module by which at least one user application can be created and/or modified and stored in said storage means, wherein said programming module is designed such that at least one input parameter, at least one operator and at least one action can be chosen as program elements and combined to generate at least one user function of said user application which can be executed by said microprocessor.

Abstract: A multi-pump control system with a control module, a processing module, communication interface, and a storage module. The system is configured to change a number n of running pumps, and receive a signal indicative of a power consumption P and information about a speed ? of one of the n running pumps before and after two different changes of the number n of running pumps. The system is configured to determine, before and after at least two different changes of the number n of running pumps, without a measurement of a differential pressure ?p and of a flow Q, two approximated pump characteristics Pn and ?{tilde over (p)}n, wherein each of the approximated pump characteristics Pn and ?{tilde over (p)}n is unambiguously defined by a pair of parameters (?1, ?2; ?3, ?4). The system is configured to store the pair of parameters (?1, ?2; ?3, ?4) for each of the determined approximated pump characteristics Pn and ?{tilde over (p)}n.

Abstract: A computer-implemented method for controlling one or more components of a water utility system, the water utility system comprising at least one pump assembly, the method comprising: receiving a user indication indicative of a user-perceived acoustic-noise induced discomfort experienced at least at a first location, measuring at least a first sound signal at said first location, determining, based on the measured first sound signal and based on at least one of a received user indication of a degree of the user-perceived acoustic-noise induced discomfort and a received first operational parameter of the pump assembly, the first operational parameter being representative of an operational condition of the pump assembly at the time of said measuring the first sound signal, one or more adjusted control parameters of the water utility system, and controlling the water utility system based on the determined adjusted control parameters.

Abstract: A method serves for operating an electronically controlled pump assembly (1), with which setting parameters of the pump (2) can be adjusted in an electronic control (6), for adaptation to the hydraulic demands of the location installation situation (4, 5). Operating data is registered during the operation of the pump assembly (1). After a predefined time and on the basis of the registered operating data, it is examined as to whether the pump assembly (1) has been set vis-à-vis the factory settings. If this is not the case a signal (11) is issued in order to point out the necessary setting.

Abstract: A pump assembly with a pump unit comprising an impeller for pumping fluid, an electric motor for driving the impeller, a control module for controlling the speed of the electric motor in a control mode, and an interface for receiving a pulse width modulated (PWM) control signal with a duty cycle indicative of the speed of the electric motor. The control module is configured to interpret the PWM control signal at start-up of the electric motor per default in a configuration mode as a configuration bit sequence based on the duty cycle of the PWM control signal during a pre-determined configuration window.

Abstract: Computer-implemented methods are disclosed for determining a flow rate of fluid flow at a target time through a pump, such as a centrifugal pump, the pump being driven by a pump motor. An illustrative method includes, in some aspects: receiving at least one set of previous parameter values including a first previous parameter value indicative of a first operational parameter of the pump motor at a previous time, earlier than the target time, and a second previous parameter value indicative of a second operational parameter of the pump motor at the previous time, and receiving a current set of parameter values including a first current parameter value indicative of the first operational parameter of the pump motor at the target time and a second current parameter value indicative of the second operational parameter of the pump motor at the target time.

Abstract: A sealing ring provides a fluid seal between a first flange and a second flange. The sealing ring forms a tubular element and includes a tapering wall member defining an interior funnel-shaped through-going opening extending axially and tapering from a proximal end to a distal end. The tapering wall member is made from a resilient material proving an axial deflection of the tapering wall member when exposed to an axial force.

Abstract: An electric pump drive motor three-phase stator assembly (1) includes three sets of stator segments (Si,j), configured in a ring about a stator axis (R). Each set includes n?2 stator segments arranged in an n-fold rotational symmetry about the stator axis. Each stator segment includes a coil (3) having a first coil wire end and a second coil wire end. A plurality of 3n?3 connection wires (Wi,k) connect coils of a respective set of stator segments in series. A first and a second interposed stator segment are arranged in circumferential direction between the two connected coils of the respective set of stator segments. 3n?5 of the connection wires span across the first interposed stator segment at a distance (r1) to the stator axis and across the second interposed stator segment at a second distance (r2) to the stator axis (R). The second distance is larger than the first distance.

Abstract: A centrifugal pump assembly includes a pump head, a pump base defining a pump inlet and a pump outlet, a fluid outlet channel from the pump head to the pump outlet, impellers, defining an impeller fluid channel between an impeller inlet and outlet and connected with one of rotor shaft segments including a positive fit coupling for torque transfer between at least two rotor shaft segments, and one or more pump stage housing segments arranged between the pump base and the pump head. The pump stage housing segments have a structure defining a guide passage for receiving pumped fluid from the impeller outlet of the impellers and for guiding pumped fluid to the impeller inlet of another one of the impellers or to the pump head. The pump stage housing segments each have a structure defining at least a part of a wall section of the fluid outlet channel.

Abstract: A submersible pump assembly (1) includes a submersible pump (2) with a housing (3), and a sensor capsule (4) with a hermetically sealed casing (5). The sensor capsule (4) is releasably mountable at a sensor position (6) located at an outer face (7) of the housing (3) of the submersible pump (2). The submersible pump (2) includes a primary coil (8) within the housing (3). The sensor capsule (4) includes a secondary coil (9) within the casing (5). The primary coil (8) and the secondary coil (9) are arranged to be inductively coupled with each other for wirelessly transferring data and/or power through the housing (3) and the casing (5) when the sensor capsule (4) is mounted at the sensor position (6).

Abstract: A sensor arrangement is for monitoring a circulation pump system (1) which includes at least one pump (3). The sensor arrangement includes a first vibration sensor (5) installed at a first pump part (11) of one of the at least one pump (3) and a second vibration sensor (7) installed at a second pump part (13) of the pump (3) and an evaluation module (9). The first pump part (11) and the second pump part (29) have a distance to each other. The evaluation module (9), is configured to discriminate between at least two of k?2 different types of faults based on comparing first signals received from the first vibration sensor (5) and second signals received from the second vibration sensor (7).

Abstract: A mixing valve having a first inlet port (4), a second inlet port (6) extending transverse to said first inlet port (4) and an outlet port (8). The inlet ports (4, 6) open out into a valve chamber (10) and the outlet port (8) branches off this valve chamber (10), inside which a movable valve element (12) is arranged, having an obstruction (32) inside the second inlet port (6), which protrudes from an inner circumference (36) of the second port (6) into an interior thereof. The obstruction (32) extends at least along a portion of the inner circumference (36), which portion of the circumference (36) is located on an inner side of the second inlet port (6) being distant from the first inlet port (4). A heating or cooling device includes such a mixing valve.

Abstract: A computer implemented method and a system abates the presence of sulphide (H2S(g), H2S(aq) or HS-(aq)) in a wastewater flowing in a specific wastewater network from an upstream pumping pit to a downstream pumping pit or manhole. The computer implemented method and a system includes dosing into the wastewater at a position upstream of the downstream pit or manhole a chemical for abatement of sulphide, determining by use of a sensor the concentration of sulphide at a position downstream of the position at which chemical is dosed into the wastewater, such as located in the downstream manhole. The amount of chemical dosed is determined by use of a general agent and a specific agent.

Abstract: Some particular preferred embodiments relate to the field of pumping stations for sewage and wastewater with submersible pumps mounted in the bottom of the wells. To allow easy cleaning and maintenance of the pumps without getting in contact with the dirty water the solution is a system for easy lifting of the pump out of the well and lowering the pump again with an auto coupling.

Abstract: A hydraulic system includes at least one hydraulic unit (2) having at least one flow path (14, 16, 18), an hydraulic actuator (22), provided for influencing a hydraulic flow through the flow path (14, 16, 18), at least one sensor device (24, 26), and a control device (10) for controlling the hydraulic actuator (22). The at least one sensor device (24, 26) includes a storage device (32) provided for containing information specifying the hydraulic unit (2). The control device (10) is configured to receive the information stored in the storage device (32) of the sensor device (24, 26) and to set up a control of the hydraulic actuator (22) based on the received information specifying the hydraulic unit (2). A method is provided for controlling the hydraulic actuator.

Abstract: A centrifugal pump device has at least one impeller (16), a circulation connection between a delivery side (22) of the at least one impeller (16) and a suction side (20) of the at least one impeller (16), and a valve arrangement (30, 46) in said circulation connection (44, 54). The valve arrangement (30, 46) has a first valve mode providing a pressure dependent shut-off valve (46) in the circulation connection. The valve arrangement (30, 46) allows a change between the first valve mode and at least one further valve mode. The at least one further valve mode provides at least one fixed closing degree of the circulation connection (44, 54).