A pump includes: a stator (4), a rotor (6) slidably and rotatably mounted at least partially in the stator, the rotor comprising a first axial extension (24) having a first diameter (D1) and a second axial extension (26) having a second diameter (D2) greater than the first diameter, a first valve (V1) formed by a first valve seal (18) mounted on the stator around the first axial extension, in conjunction with a first channel (42) in the rotor that is configured to allow liquid communication across the first valve seal when the first valve is in an open position, a second valve (V2) formed by a second valve seal (20) mounted on the stator around the second axial extension, in conjunction with a second channel (44) in the rotor that is configured to allow liquid communication across the second valve seal when the second valve is in an open position; a pump chamber (8) formed between the rotor (6) and stator (4) and between the first valve seal (18) and second valve seal (20); and a pump chamber seal (22) circumscribing the rotor second axial extension and separating the pump chamber (8) from an external environment. The stator (4) further comprises a dead-zone seal section (40) surrounding a dead-zone volume (39) formed between the rotor second axial extension (26) and the stator (4), wherein the dead-zone seal section (40) comprises axially extending portions (58) connected to upper and lower radial portions (60,60) to form a closed sealing circuit.

Method for detecting failure including possible under or over delivery of a micropump having at least an inlet valve, a pumping chamber with an inner pressure sensor and an outlet valve, said method comprising the determination of the pump tightness via the measurement of the pressure by said inner pressure sensor in said pumping chamber at least at certain intervals when the pump is inactive and the comparison with a value of reference.

A release valve for a self-priming pump includes a housing, a valve member, an exhaust outlet, a guide stem, a spring, and a bellows. The valve is positioned in a valve opening in the housing and is movable between an open and a closed position. The open position permits the travel of air and fluid through the opening. The closed position closes the valve opening. The valve plug is positioned in the valve opening responsive to pressure in the flow passageway of the housing. The guide stem is coupled to the valve plug and the spring is coupled to the guide stem. The bellows surrounds the spring.

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.

A washer fluid pump includes: a housing in which a motor and an impeller rotated by the motor are housed; a washer fluid introduction pipe which extends vertically from the housing; a plotter which is movable along the washer fluid introduction pipe; a moving body which is connected to the plotter and contains a magnetic material; and a reed switch which is switched on/off by a movement of the moving body.

Embodiments include an apparatus and techniques for operating an electromagnetic cartridge seal. Embodiments include operating a cartridge seal in one of a plurality of modes, and receiving a signal at a force applying mechanism of the cartridge seal, the force applying mechanism being coupled to a primary sealing component of the cartridge seal. Embodiments also include controlling the force applying mechanism based at least in part on the received signal.

A sterilization system and method are provided that convert a sterilant solution to a vapor using an outgassing process that removes sterilant vapor from a solution (e.g., liquid) or a solid and delivers the sterilant vapor into an interior of an enclosure vessel. The interior of the enclosed vessel is maintained at a vacuum pressure. Once the sterilant vapor enters the interior of the vessel, the vapor expands to all surfaces to effectively sterilizing the interior of the vessel.

Systems and methods for reducing the pressure of a first pressurized fluid, thereby reducing the temperature of the pressurized fluid, and utilization of the reduced-pressure and temperature fluid to cool a second fluid. Such an approach can enable a reduction in the size and weight of a hydraulic system, utilize waste energy in a system, and/or minimize electrical power requirements of a system, among other benefits.

A compressor 1 includes a casing 2 that covers a rotating shaft 4 and an impeller 6 and is provided with a diffuser 66 for guiding the working fluid discharged from the impeller 6 to an outside in a radial direction, a heat exchanger 71 that is cools at least a portion of the working fluid compressed by the impeller 6, a cooling fluid supplying unit 7 that supplies the working fluid cooled by the heat exchanger 71 into the casing 2 as a cooling fluid for cooling a motor 5 disposed in the casing 2, and a cooling fluid circulating unit 8 that discharges the cooling fluid that has passed through the motor 5 to an outside of the casing 2, and supplies the discharged cooling fluid downstream of an outlet 6o of a first impeller 6A and upstream of the diffuser 66.

A logic-based building water supply management system having a minimal number of components to supply water on a qualifying-demand basis, thereby preventing major building flooding due to water plumbing leaks. The components are an electrically actuated valve downstream of the main building water supply valve, an accumulator tank immediately downstream of the valve, a tank pressure sensor, an electronic control module (ECM) and a manually operated bypass valve. The valve remains in a failsafe closed position unless a determination of qualifying demand is made. With the valve closed, all water flowing in the building may only come from the tank. As water flow stank, the measured tank supply pressure decays. The ECM compares the pressure decay rate to preprogrammed values so as to distinguish normal demand from a leak and takes appropriate action by opening the valve or disabling it from opening, and alarming, until a system reset is initiated.