Abstract: Systems for use with liquid chromatography for provision of continuous flow or gradient flow in connection with two pumps providing mobile phase to a valve.

Abstract: The method for the preparation of containment units of biological liquids, comprises the following stages of: furnishing a device (1) comprising a main body (2) which defines at least a continuous filling channel (3), having at least an inlet gap (3a) of a biological liquid and at least an air outlet gap (3b), a plurality of containment units (4) arranged in succession to one another so as to communicate with each other and defining respective containment chambers (5) positioned along the filling channel (3) and placed in between the inlet gap (3a) and the outlet gap (3b), a hydrophobic air filtering device (6) associated with the body (2) in correspondence to the outlet gap (3b), wherein the containment units (4) are bulbous members each having opposing elastically deformable sides that define the respective containment chambers therebetween, and wherein after deformation the sides return to a convex non-deformed idle configuration in which the sides are at a non-zero distance from one another; injecting a b

Abstract: An absolute proportioning pumping system includes an electric motor assembly powering a first pump at a first flow rate and powering a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output. In accord with further embodiments, a pump and motor assembly is mounted to and generally surrounded by a liquid tank. The pump and motor assembly may include a pair of fixed ratio outputs driven from a common motor, or may include a single variable output pump either slaved to a master pump or controlled through a timed bypass valve to control output flow rate.

Abstract: An electric generator set fuel control system is disclosed. The fuel control system includes an electric generator, a prime mover mechanically coupled to the generator, a first fuel tank, a fuel level sensor configured to generate a fuel level signal indicative of a fuel level in the first fuel tank, a fuel loading operator input device configured to generate a fuel loading signal, a fueling mode operator input device configured to generate a fueling mode signal, and a control module. The first fuel tank is configured to supply fuel to the prime mover, and selectively receive or supply fuel to a second fuel tank through a fuel pump. The control module is configured to generate a fuel transfer signal as a function of the fuel loading signal, the fueling mode signal, and the fuel level signal.

Abstract: A system for delivering frac water at high pressure is provided, including a first pump positionable within a tank, the first pump configured to receive water from within the tank and output the water at pressure to a first pressure tank; a second pump positionable above the first pressure tank, the second pump configured to receive water from the first pressure tank and output the water at pressure to a second pressure tank; and a third pump positionable above the second pressure tank, the third pump configured to receive water from the second pressure tank and output pressurized water to a discharge piping, the discharge piping leading said pressurized water over a wall of said tank.

Abstract: A water lifting system, in particular a fire extinguishing system for offshore installations, such as oil and/or gas production platforms or ships or the like, and a method for operating a water lifting system, is provided. The system includes a pump, a pump-turbine assembly having a pump unit and a turbine unit, and a line connecting the pump-turbine assembly's pump unit output opening and the pump suction opening through which a volume flow (QS) is conducted. The volume flow (QS) include a first partial volume flow (QF) and a second partial volume flow (QT). The first partial volume flow (QF) is conducted to at least one water extraction point and the second partial volume flow (QT) is conducted to the input opening of the pump-turbine assembly's turbine unit.

Abstract: A transmission assembly for a work machine (10) includes a transmission (16) having a transmission housing (18), a manifold housing (20) attached to the transmission housing (18), and hydraulic pump (22) configured to be connected to the manifold housing (20).

Abstract: Systems and methods are provided for preventing oil migration in an engine lubrication system. The system includes a gearbox, a shaft disposed at least partially in the gearbox, an oil reservoir in flow communication with the gearbox, an oil supply pump in flow communication with the oil reservoir and coupled to the shaft, an oil scavenge pump coupled to the shaft and configured to pump oil from the gearbox, and an oil cooler in flow communication with and disposed between the oil scavenge pump and the oil reservoir. The system also includes a bypass drain line disposed between the oil source and the oil supply pump, a drain valve disposed in the bypass drain line configured to close when the pressure is above a predetermined pressure, and a check valve disposed between the oil supply pump and the gearbox configured to open when the pressure is above the predetermined pressure.

Abstract: The present disclosure provides an apparatus and method for coupling conduit segments together. A first pump obtains a sample and transmits it through a first conduit to a reservoir accessible by a second pump. The second pump further conducts the sample from the reservoir through a second conduit.

Abstract: Embodiments of the present invention are directed to devices and methods for propelling fluids that feature at least one first pump assembly having a primary pump, an accumulator pump, drive means, valve means and control means. The valve means moves between the first position and the second position as the accumulator pump and primary pump alternate between a loading movement and a pump movement. The control means is in signal communication with the accumulator pump, the primary pump and the valve means. The control means issues signal command to the accumulator pump to assume the loading movement and the pump movement and the primary pump to assume the loading movement and pump movement in coordination with the movement of the valve means such that fluids are propelled from the first outlet.

Abstract: A power steering fluid refilling and draining device according to the present invention includes a frame mounting with a fresh fluid tank including an output pipe connected to a first three-way valve and a refilling port. The frame further houses a used fluid tank including a sucking pipe connected to a second three-way valve and a sucking port. A pneumatic pump is interconnected to the output pipe and the sucking pipe, respectively. Wherein when the pneumatic pump is operated, the fresh fluid will be delivered into a steering system with used fluid therein being sucked out by the sucking port simultaneously. Each of the fresh fluid tank and the used fluid tank is provided with a window.

Abstract: A pump, for supplying high pressure fuel from a fuel tank to an engine via a common rail, includes a motor assembly (20) mounted on top of the fuel tank, a pump assembly (26) positioned within the fuel tank, and a support column (32) rotatably connecting the motor assembly to the pump assembly. A high pressure pump sub-assembly (46) includes a pump body (48) having a drive bore (50) and multiple plunger bores (60) formed therein. The external profile of a drive member (58) which is rotatable within the drive bore engages the radially inner end of pumping plungers (62) disposed in each of the plunger bores for a portion of each revolution to reciprocally move the plungers between radially inner and outer limit positions. Reciprocation towards the inner limit position induces a low pressure in the radially outer end of the plunger bore, thereby drawing fuel via the drive bore without the aid of a low pressure pump.

Abstract: A motor pump aggregate M has a housing 1 defining an oil reservoir with first and second chambers R1, R2. An electromotor 2 is driving via its motor shaft W at least one radial piston pump arrangement P1 provided within said first chamber R2. Both chambers R1, R2 are separated by a separation wall 7. A filling and pressure biasing system V is provided for said first chamber R1 in order to adjust within said first chamber R1 a predetermined oil filling level and a pre-selected oil pressure pre-biasing for said radial piston pump arrangement P1.

Abstract: A pool, spa, hot tub or the like having a basin capable of retaining water, a first pump for recirculating a portion of the water within the basin to inlet jets within the side walls of the basin and a second pump for recirculating water from the basin to additional inlet jets in the side walls of the basin. Both the first pump and the second pump are driven by a single double-shaft electric motor.