A hydraulic valve device includes a first inlet port (20) and a second inlet port (22) and a valve element (24) for selectively closing one of the first and the second inlet port. The valve element (24; 24) is rotatable between two valve positions such that a surface of the valve element is moved in a direction parallel to openings of the inlet ports. The valve element includes two separate sealing portions (72, 74), a first sealing portion (72) for closing the first inlet port and a second sealing portion (74) for closing the second inlet port. The two sealing portions are arranged such that in a first valve position a first sealing portion closes the first inlet port and in a second valve position a second sealing portion closes the second inlet port. A centrifugal pump device includes such hydraulic valve device.

The present invention concerns a medical pump comprising: a. A hard housing comprising a top (24) and bottom (1) hard shells, within which a rigid wall (3) and a movable membrane (2) create three distinct chambers; wherein i. said movable membrane tightly separates said second (29) and third (22) chambers ii. said first and third chambers have a watertight interface iii. said second chamber (29) is designed to contain a fluid iv. said first chamber (23) comprises a first venting mean (20) which is arranged to provide a fluidic communication between said first chamber (23) and the external environment; v. said third chamber (22) comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber (22) and the external environment b. A pumping element (4) located in the first chamber (23) c. A least one pressure sensor which measure the pressure gradient between the first chamber (23) and the second chamber (29) d. A fluid pathway which permits: i. a first fluid connection (27) between said second chamber (29) and said pumping element ii. a second fluid connection (28) between said pumping element and a patient line (30).

A method includes receiving an power value for a first pump and a differential pressure across the first pump and receiving an power value for a second pump and a differential pressure across the second pump, wherein the first pump is in a first pumping line and the second pump is in a second pumping line that pumps in parallel with the first pumping line. The flows through the first pumping line and the second pumping line are adjusted to minimize an power per flow per differential pressure of the first and second pumping lines in combination.

A fluid transportation network includes plural parallel zones, a common supply line for feeding a total flow of fluid to the parallel zones, each parallel zone being connected to the common supply line and associated with a pump that controls a flow of fluid through the respective parallel zone, one or more zone valves arranged in one of the parallel zones and controlling the flow of fluid through the parallel zone, and a processor that controls one or more of the pumps, and/or the at least one zone valve, to control the flow of fluid through the parallel zones. The pumps control the flow of fluid through one or more of the plural parallel zones only when a respective pump is operating within a specified efficient operating range of the respective pump, and the respective pump regulates flow of fluid above a respective flow threshold value of the respective pump.

Introduced is a flow path conversion pump comprising: an inlet pipe for guiding a flow of water, an impeller housing having an impeller built therein, and including a first housing outlet and a second housing outlet formed parallel to a tangential direction of rotation of the, a flow path switch forming an internal space, including a first switch inlet and a second switch inlet, which communicate with the first housing outlet and the second housing outlet, respectively, and including a first outlet and a second outlet, which communicate with the first switch inlet and the second switch inlet, respectively, a diaphragm disposed in the internal space of the flow path switch, separating the first switch inlet and the second switch inlet, and separating the first outlet and the second outlet and a motor connected to the impeller to transmit power.

A coolant pump includes an impeller pump wheel, a pump housing defining an outlet volute, and an outlet valve arrangement. The pump housing comprises an outlet volute housing which defines a first outlet channel comprising a valve opening. The valve opening is defined by a valve seat which defines a valve seat plane and a symmetry plane. The symmetry plane is arranged in the middle of and rectangular to the valve seat plane. The outlet valve arrangement is in the first outlet channel and comprises a valve flap which opens/closes the valve opening. The valve flap comprises a flap seat corresponding to the valve seat. The valve flap rotates around a pivot axis parallel to the symmetry plane and having an eccentricity from the symmetry plane which is between 1/20 and 1/1 of a distance of the pivot axis to the valve seat plane when the valve flap is open.

A tool is provided for use in a variety of ESP and other well control applications. The tool employs a simplified design for ESP and well control applications and has a main valve which may be operated by a plurality of different shifting tools.

A test and monitoring system for a pump installation that initiates a cycle, admits liquid to the pump installation by an electrically-actuated valve, detects a predetermined event, stops admittance of the liquid to the pump installation by the electrically-actuated valve, and indicates results of the test cycle. The predetermined event may be a passage of a predetermined amount of time, an input from a liquid level sensor, or an input from a current sensor. The current sensor may be in electrical communication with a pump of the pump installation. The pump installation may be a sump pump installation.

A method includes controlling a bearing fluid supply system to provide the bearing fluid to a hydrostatic bearing of the turbopump assembly. The bearing fluid includes a supercritical working fluid. The method also includes receiving data corresponding to a pressure of the bearing fluid measured at or near a bearing fluid drain fluidly coupled to the hydrostatic bearing, determining a thermodynamic state of the bearing fluid at or near the bearing fluid drain based at least in part on the received data, and controlling a backpressure regulation valve to throttle the backpressure regulation valve between an opened position and a closed position to regulate a backpressure in a bearing fluid discharge line to maintain the bearing fluid in a supercritical state in the hydrostatic bearing and/or at or near the bearing fluid drain.

A mechanical coolant pump for an internal combustion engine includes a pump housing defining an outlet volute, a first outlet channel comprising a first valve opening, a second outlet channel comprising a second valve opening, an impeller pump wheel, and an outlet valve arrangement. The second outlet channel is separate from and fluidically parallel to the first outlet channel. The impeller pump wheel pumps a liquid into the outlet volute. The outlet valve arrangement is fluidically upstream of the first outlet channel and the second outlet channel. The outlet valve arrangement comprises an integral valve body which pivots between an open position and a closed position. The valve body comprises a first retaining section and a second retaining section. When the valve body is in the closed position, the first retaining section completely closes the first valve opening and the second retaining section only partially closes the second valve opening.