An impeller pump has a pump chamber with an inlet and an outlet, and an impeller in the pump chamber. An auxiliary outlet out of the pump chamber together with an auxiliary outlet flap is provided, the auxiliary outlet flap having a closed position and at least one open position and being rotatable or movable between the positions. In the closed position, the auxiliary outlet flap closes off the auxiliary outlet and, in each of the open positions, the auxiliary outlet flap at least partially opens the auxiliary outlet. The auxiliary outlet flap has an actuator and is subjected to force loading by the actuator, such that the auxiliary outlet flap is moved automatically from the closed position into one of the open positions if the auxiliary outlet flap is free from fluid flow in a direction of rotation of the impeller.

The invention discloses a water feeding pump or a fertilizer applying pump for a pump station of a fertilization and irrigation system. The water feeding pump (2) or the fertilizer applying pump (3) is a centrifugal pump. The centrifugal pump includes a volute and an impeller. The impeller includes a front disc (12), a rear disc (13), and main blades (14), and a plurality of back blades (18) distributed along a circumferential direction are disposed on a back surface of the rear disc, where an auxiliary rotating disc (11) is disposed between the impeller and a rear side wall of the volute, the auxiliary rotating disc is a rotating member and is driven by the back blades of the impeller to rotate.

A pump assembly is disclosed comprising, a pump including a pump housing having a fluid inlet. At least one fluid outlet extends from the pump housing. An impeller driven by a motor is mounted in the pump housing arranged to move a fluid from the fluid inlet to the at least one fluid outlet. A valve rotatably mounted between the impeller and the at least one fluid outlet selectively controls the flow of fluid through the at least one fluid outlet.

A liquid pump has a pump housing defining a pump chamber. A motor is accommodated within the pump housing and separated from the pump chamber by an end cap. An impeller disposed within the pump chamber is driven by the motor. The pump chamber has an inlet and one or more outlets. The outlets are located on a sidewall of the pump chamber and extend in a direction substantially tangential to an outer circumference of the pump chamber. Each outlet has a first end near the pump chamber, and a second end remote from the pump chamber. A cross-sectional area S.sub.1 of the first end is smaller than a cross-sectional area S.sub.2 of the second end, forming a diffuser within the outlet.

A pump assembly includes an impeller (18), which for rotation is connected to an electrical drive motor (20) which can be driven in two rotation directions (A, B) and a valve (10) situated in an inlet of the pump assembly. The valve includes a valve element (48) movable between at least two switch positions and is connected for movement to a drive element (36, 60) subjected to the flow produced by the impeller (18). The valve element (48), in at least a first of the two switch positions, closes an inlet channel (44, 46) of the pump assembly (12) and is arranged such that the movement direction into this first switch position corresponds to the flow direction (S1, S2) through this inlet channel (44, 46). A hydraulic system is provided with two circuits and such a pump assembly. The valve serves as a switch-over valve between the two circuits.

An integrated oil system manifold is provided, which includes a combination of a reverse rotation protection element, a first pump check valve, a second pump check valve, and a pressure relief valve integrated with a housing. Furthermore, a combination of a temperature control element, a filter, a heat exchanger, an integral main pump assembly, and an integral auxiliary pump assembly may also be included in the integrated manifold. An associated method is also provided.

An integrated oil system manifold is provided, which includes a reverse rotation protection element, a main pump check valve, an auxiliary pump check valve, and a pressure relief valve, wherein the reverse rotation protection element, the main pump check valve, the auxiliary pump check valve, and the pressure relief valve are integrated with a housing of the integrated oil system manifold. Furthermore, a temperature control element, a filter, a heat exchanger, an integral main pump assembly, and an integral auxiliary pump assembly may also be included in the integrated manifold. An associated method is also provided.

The invention relates to a centrifugal pump assembly having an electric drive motor (2), at least one impeller (14) driven by said electric drive motor (2) and a valve element (24; 24) rotatable between two 5 valve positions driven by a fluid flow produced by said impeller (14), wherein the valve element (24; 24) has a cover plate (104; 104) extending transverse to the rotational axis (X) of the impeller (14) and facing the impeller (14), wherein the valve element (24; 24) having protrusions (102, 102) arranged on an outer surface side facing away 10 from the impeller (14) such that a flow can act on them for driving the valve element (24; 24).

A liquid pump (10) comprises an impeller (60) housed in an impeller chamber (22) having an axial inlet (26) and a plurality of centrifugal passages (23, 24) communicating with a plurality of outlets (35a, 35b) through a valve (80). The rotation of the impeller (60) pumps the liquid into one of the centrifugal passages (23, 24) and elastically deforms the valve (80) that controls through which outlet (35a, 35b) the liquid is pumped out of the pump (10).

A pump assembly is disclosed comprising a pump including a pump housing having a fluid inlet conveying fluid to a pump cavity At least one fluid outlet extends from the pump housing. A plurality of fluid outlet ports extend from the pump housing. An impeller driven by a motor drives the fluid in the pump cavity. In a first embodiment, a valve member rotatably mounted between the impeller and the plurality of fluid outlet ports is arranged to selectively direct the flow of fluid from the pump cavity to one or more of the plurality of fluid outlet ports. In a second embodiment, the valve member includes a first and a second wall between a first and a second opening. The first and second openings are arranged to direct the flow of fluid from the pump cavity to at least two of the plurality of fluid outlet ports.