Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

A two-phase liquid-gas flow system for testing electrical submersible pumps (ESP) includes an oil pump, a water pump, an oil storage tank, a water storage tank, a pressurized air system, an air pressure regulator (PR), and a transparent test section with the ESP. The pressurized air system includes air storage tanks, compressors, and air flow meters (AFM). The oil pump and the water pump supply oil and water from the oil storage tank and the water storage tank through an oil flow meter and a water flow meter, respectively, to the transparent test section. The air storage tanks are in fluid communication with the PR by valves, which channel air through the PR and the AFMs to the transparent test section. A camera is provided to capture photos and videos of flow patterns of the working fluid in the transparent test section.

A controllable pump system can include an inlet line and a pressure controlled pump connected to the inlet line to receive input flow. The pressure controlled pump can have a pressure controlled pump state configured to control a pump output to an output line connected to the pressure controlled pump. The system can include a slew pump connected to the inlet line and configured to output a slew pump pressure, and a slew pressure valve connected to the input line and to a second line and configured to output a control pressure to the pressure controlled pump. The second line can be configured to be in fluid communication with at least the slew pump such that the slew pressure valve can receive the slew pump pressure.

A valve pump unit having an electric motor, a reduction gearbox driven by the electric motor, a first pump stage driven by the electric motor, a second pump stage driven by the electric motor, a multiway valve adjusted via the reduction gearbox and having heat transport medium channels for providing at least two switching positions between a first heat transport medium circuit and a second heat transport medium circuit, and also a common housing section for accommodating the electric motor, the multiway valve, the reduction gearbox and also the first pump stage and the second pump stage. In pumping operation, the electric motor is rotated in a first direction, and the reduction gearbox is uncoupled from the electric motor via a freewheel. The reduction gearbox may be operated in a second direction of rotation of the electric motor, to adjust the multiway valve.

A sump pump system for a residential building has a sump with an inlet that receives water from an external source, a pump positioned with the sump, the pump having a pump inlet in fluid communication with the sump and an outlet in communication with a fluid destination, a valve connected to the inlet of the sump, the valve being movable between an open position in which fluid is permitted to enter the sump via the inlet, and a closed position, in which fluid is prevented from entering the sump via the inlet, wherein the valve is biased toward the closed position, and a valve restraint that is electrically actuated between a first state and a second state. In the first state, the valve restraint holds the valve open and in the second state, the valve restraint releases the valve.

A hydraulic system for a household appliance which includes a pump that is driven by an electric motor, an outlet conduit in fluid communication with an outlet of the pump, a magnetic check valve having a flap and a control unit. The control unit is configured to control the speed of the electric motor in a closed loop and to determine whether the flap of the check valve is in an open position or in a closed position based on the torque of the electric motor estimated from the current consumption of the electric motor and/or the voltage in the terminals of the electric motor.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.