A clothes treating device includes a clothes accommodation part for accommodating clothes or laundry, a water supply pipe for supplying water into the clothes treating device, and a drain pipe for discharging water to the outside of the clothes treating device. A pump assembly generates a flow of water inside the water supply pipe and the drain pipe by using the rotation of a motor. The flow of water is generated only in one of the water supply pipe and the drain pipe depending on the rotating direction of the motor.

A centrifugal pump assembly includes an electrical drive motor (4, 6), an impeller (14) which is driven by the electrical drive motor (4, 6) as well as with at least one valve element (18) which is directly or indirectly movable along a first movement path between at least two switching positions, by the electrical drive motor (4, 6). At least a part of the valve element (18) is additionally movable along a second movement path which is different to the first movement path, between a released position, in which the valve element is distanced to at least one contact surface and a bearing position, in which the valve element bears on the at least one contact surface.

A centrifugal pump assembly includes an electrical drive motor (4, 6), an impeller (14) which is driven by the drive motor and a pump casing (12) surrounds the impeller and including two branches (27, 32, 34). A movable valve element (18) is arranged in the pump casing and is movable between two switching positions, in which the flow paths through the two branches (27, 32, 34) are opened to a different extent. The valve element (18) is configured and arranged in the pump casing (12) such that it separates a suction chamber (24) which is connected to a suction side of the impeller (14) from a delivery chamber (26) which is in connection with the delivery side of the impeller (14). The valve element (18) is mechanically and/or hydraulically coupled to the drive motor (4, 6) for at least a movement between the two switching positions.

A pump for conveying a highly viscous fluid includes a casing with at least a first inlet and an outlet for the fluid, and an impeller for conveying the fluid from the inlet to the outlet. The impeller is arranged on a rotatable shaft for rotation around an axial direction, and includes a front shroud facing the first inlet of the pump. The casing includes a stationary impeller opening for receiving the front shroud of the impeller and has a diameter. The front shroud and the stationary impeller opening form a gap having a width in a radial direction perpendicular to the axial direction, and the ratio of the width of the gap and the diameter of the impeller opening is at least 0.0045.

Technologies are generally described for end-suction pumps that are adapted for a dual inlet impeller. Example end suction pumps includes a body casing with a pump housing, a single inlet, a single outlet, and a magnetically coupled drive to effectuate drive to the impeller in the body casing. Fluid flows to one side of the impeller (e.g., a right-eye side) via a primary flow path from an impeller inlet of the body casing, and also to another side of the impeller (e.g., a left-side eye) via a secondary flow path through a stationary shaft with a semi-hollow hydraulic passageway therein.

A centrifugal pump that is used for conveying water and other fluids. The pump is constructed such that the movement of water is provided without undue pressures being needed.

A double suction impeller is disclosed. In at least one embodiment, the impeller is configured for centrifugal pumps and hydraulic power recovery turbines. The impeller's flow-path arrangement comprises inter-blade channels, intersecting each other at the impeller's outer diameter and defining a variable cross section shape, so that the equivalent number of blades is at least doubled with respect to a conventional configuration obtained by the coupling of two single suction impellers and an improved control over the velocity of the flow within the inter-blade channels is achieved.

The invention relates to mechanical engineering, namely to pumping installations designed for pumping water, water solutions, as well as oil, oil products and the like through the main, process and auxiliary pipelines, and is directed toward providing a single-stage centrifugal pumping unit which demonstrates peak efficiency in non-nominal modes while having a simplified design and being universal in nature. To this end, a single-stage centrifugal pumping unit comprises a centrifugal single-stage double entry pump, an electric drive motor, a coupling, connecting their shafts, a support frame for mounting the pump housing and the electric motor thereon, a housing, which consists of a base and a cover, inlet and outlet manifolds, a rotor with an impeller mounted thereon, the rotor being installed in support bearings, and a volute configured according to the invention in the form of a separate, independent component, and parts of the outside surface thereof, which are intended to be accommodated in cradles provided for this purpose in the cover and the housing, correspond to the shape of the surfaces of said cradles. The impeller and the volute are replaceable as a pair, the parameters of the impeller and the volute in each pair are calculated to provide maximum efficiency while ensuring the requisite feed and pressure. The replaceable volutes are made as an integrated cast component and comprise a baffle separating the fluid flow during the movement.

Disclosed invention is an improved sealing system for axially split, centrifugal pumps. The improved sealing system eliminates the need for a gasket between casing halves. In the improved sealing system, a fluid tight seal is provided by an elastomeric cord positioned within a groove carried by the flange of at least one half of the axially split pump casing.

Embodiments of the invention provide a pump having a motor, a housing, a seal plate coupled to the housing and including a seal plate hub with mounting supports, an impeller arranged within the housing, a coupling assembly coupling a motor shaft and a pump shaft, and a seal and jacking assembly including a mechanical seal and a seal gland. The seal gland is removably coupled to the mounting supports and includes threaded jacking apertures extending axially through the seal gland, each configured to receive a jacking element. When the seal gland is decoupled from the mounting supports, the seal gland is moveable axially between a first position whereat the seal gland engages the mechanical seal and a second position whereat the seal gland engages a retaining ring coupled to the pump shaft in response to rotation of the jacking elements received within the pair of threaded jacking apertures.