Abstract: An oil pressure supply system of automatic transmission may include mechanical oil pump discharging the pumped oil pressure to line pressure passage, line regulator valve controlling the oil pressure of the line pressure passage and supplying the controlled oil pressure to first passage, line regulator valve controlling the oil pressure of the first passage and supplying the controlled oil pressure to second and third passages, torque converter lock-up clutch control valve changing over passage to supply the oil pressure of the second passage and supply the oil pressure through the third passage to cooling/lubrication portion through sixth passage, electric oil pump discharging the oil to seventh passage, first switch valve to selectively opening the oil pressure supplied to eighth passage, second switch valve selectively supplying some of the oil pressure supplied to the eighth passage to the cooling/lubrication portion through ninth passage, and four solenoid valves for controlling the valves.

Abstract: The present invention covers systems and methods for priming a canister fluid filtration system. It utilizes the push and pull caused by the movement of a piston of a priming pump between two openings in the chamber of the priming pump, to push the air out of the canister and introduces fluid into it, thereby achieving the purpose of priming the fluid filtration system.

Abstract: This disclosure relates to a distribution boom for stationary or mobile viscous material pumps, comprising at least one boom arm having a box profile. The boom arm has two side walls which are arranged at a distance from one another and which are connected to one another by means of two transverse walls which are arranged at a distance from one another. Each side wall has a lead-through opening for a conveying line. Provision is made according to this disclosure for there to extend between the side walls a tube which is fixedly connected thereto and which opens by way of the tube ends thereof into the lead-through openings. Between the tube ends and the adjacent side wall there is arranged a respective flange which projects in an encircling manner over an outer border of the respective tube end and is welded both to the tube end and to the side wall in question.

Abstract: A hydraulic pressure supply system of an automatic transmission for a vehicle which generates a low hydraulic pressure and a high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion may include a low-pressure hydraulic pump, a first switch valve, a low-pressure regulator valve, a high-pressure hydraulic pump, a second switch valve and a high-pressure regulator valve.

Abstract: Air conditioning system using deep seawater, including: a first pump pumping deep seawater; a seawater-coolant heat exchanger receiving pumped seawater, and performing heat exchange between a cold energy in pumped deep seawater and a coolant; an air conditioning heat exchanger receiving the coolant, and performing heat exchange with the coolant, to release cold energy in a target facility to cool the target facility; a fluid circulating system circulating the coolant between the seawater-coolant heat exchanger and air conditioning heat exchanger through a pipe using a second pump; and an operation controller controlling driving of the first pump at timing in advance of when a variation is anticipated in predicted heat loads of the target facility, based on a prediction operation status value and a predicted weather status value of the target facility, and based on a time lag due to a length of the pipe in the fluid circulating system.

Abstract: There is provided a radioactive sludge transfer apparatus for safely and surely transferring radioactive sludge contaminated by radioactive substance stored in a sludge storage tank to a transfer tank for the sake of tank inspection.

Abstract: A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

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: Embodiments provided herein describe pumps and methods for pumping fluids. A first fixed valve has a passageway extending therethrough with first and second ends. The first fixed valve is configured to allow fluid flow through the passageway towards the second end thereof and at least partially restrict fluid flow towards the first end thereof. A pumping structure is in fluid communication with the second end of the passageway of the first fixed valve. A second fixed valve has a passageway extending therethrough with third and fourth ends. The second fixed valve is configured to allow fluid flow through the passageway towards the fourth end thereof and at least partially restrict fluid flow towards the third end thereof. The third end of the passageway of the second fixed valve is in fluid communication with the pumping structure and the second end of the passageway of the first fixed valve.

Abstract: A hydraulic pressure supply system of an automatic transmission generates low and high hydraulic pressures using oil stored in an oil pan and supplies the low and high hydraulic pressures respectively to a low and a high pressure portions. The system may include: a low-pressure hydraulic pump pumping the oil stored in the oil pan; a low-pressure regulator valve controlling the low hydraulic pressure to be stable hydraulic pressure, and supplying the stable hydraulic pressure to the low pressure portion; a high-pressure hydraulic pump changing the low hydraulic pressure into the high hydraulic pressure and supplying it to the high pressure portion; and a high-pressure regulator valve controlling the high hydraulic pressure to be stable hydraulic pressure, wherein the low-pressure and high-pressure hydraulic pumps are driven by one drive shaft, and the high-pressure hydraulic pump is a variable capacity hydraulic pump capable of controlling discharging flow amount.

Abstract: A nuclear plant is provided with a pipe-passivating alkali-injecting device including an alkali-injecting tank, an actuator, a counter-balance valve, a pressure gauge, exhaust valves and switching valves. The actuator is connected to the alkali-injecting tank via a first pipe. The counter-balance valve is connected to the actuator via a second pipe and connected to the alkali-injecting tank via a third pipe. The pressure gauge is provided between the actuator and the counter-balance valve and connected to the second pipe. The exhaust valves are connected to the first and second pipes, and so are the switching valves. The alkali-injecting tank, the actuator and the counter-balance valve are used together to expel gases from the pipes while injecting alkali, thus effectively avoiding feedback of liquid in the nuclear plant, transmitting pure alkali in the pipes, and reducing damage to the pipes.

Abstract: A hydraulic pressure supply system of an automatic transmission for a vehicle which generates low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion, may include a low-pressure hydraulic pump driven by a first power source so as to pump the oil stored in the oil pan, generating the low hydraulic pressure, and supplying the low hydraulic pressure to the low pressure portion, and a high-pressure hydraulic pump driven by a second power source and fluid-connected to the low-pressure hydraulic pump so as to receive the low hydraulic pressure from the low-pressure hydraulic pump, changing the low hydraulic pressure into the high hydraulic pressure, and supplying the high hydraulic pressure to the high pressure portion.

Abstract: A hydraulic pressure supply system of an automatic transmission may generate low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and may supply the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion. In the hydraulic pressure supply system, a low-pressure hydraulic pump pumping the oil stored in the oil pan and generating the low hydraulic pressure and a high-pressure hydraulic pump changing the low hydraulic pressure supplied from the low-pressure hydraulic pump into the high hydraulic pressure and supplying the high hydraulic pressure to the high pressure portion may be integrated as one hydraulic pump.

Abstract: A hydraulic pressure supply may include a low pressure portion, a high pressure portion, a low-pressure hydraulic pump receiving the oil stored in the oil pan and discharging the low hydraulic pressure to a first low-pressure line fluid-connected to the low-pressure hydraulic pump, a switch valve fluid-connected to the first low-pressure line, and selectively supplying the low hydraulic pressure to the low pressure portion or the high pressure portion, a low-pressure regulator valve connected to the switch valve, a high-pressure hydraulic pump fluid-connected to the low-pressure hydraulic pump through the first low-pressure line, a high-pressure regulator valve fluid-connected to the high pressure line and controlling the high hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure supplied from the low-pressure hydraulic pump to be stable high hydraulic pressure, a second input line connecting the oil pan to the first low-pressure line.

Abstract: Method for carrying out a bleed and feed of process solutions in a process tank. The feed solution is pumped out of a first tank into a first receiving space. The first receiving space is subsequently emptied into the process tank of with a pump. The volume of delivered feed solution in the process tank is measured. The bleed solution is pumped from the process tank with a pump into a second receiving space. The volume of delivered bleed solution in the second receiving space is measured. The bleed solution in the second receiving space is subsequently emptied into the second tank. The first receiving space differs from the second receiving space. A correction factor is calculated by comparing the measured and calculated volumes of the bleed and feed solution delivered by the pumps, with which correction factor the nominal delivery volume of the pumps are corrected in the next cycle.

Abstract: A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

Abstract: A fuel system for an auxiliary power unit includes a mechanical fuel pump, an electric fuel pump, and a controller. The mechanical fuel pump provides fuel flow to the auxiliary power unit and has an output dependent upon an operational speed of the auxiliary power unit. The electric fuel pump is located in flow series with the mechanical fuel pump. The controller causes the electric fuel pump to circulate and thereby warm fuel prior to start up of the auxiliary power unit.

Abstract: A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

Abstract: A symmetrical series fan structure includes multiple frame bodies made with single mold. Each frame body has a first through hole, a second through hole and a base having multiple connection members. The base is positioned in the second through hole on one side of the frame body and connected to the frame body via the connection members. The frame body has multiple fixing members and multiple fixing holes on the same side of the frame body as the base. The frame bodies are serially connected by means of inserting the fixing members into the fixing holes with the bases and the connection members of the frame bodies attached to each other. Accordingly, the frame bodies can be made with single mold and assembled to form the symmetrical series fan structure. In this case, the mold development cost is saved and the manufacturing cost is lowered.

Abstract: A fuel supply system includes a low pressure fuel pump, which suctions and discharges fuel accumulated in a fuel tank, and a high pressure fuel pump, which suctions and discharges the fuel discharged from the low pressure fuel pump and supplies the fuel to a fuel injection valve installed in an internal combustion engine, the low pressure fuel pump, high pressure fuel pump, and fuel injection valve being connected in series, wherein the low pressure fuel pump and high pressure fuel pump are configured in such a way as to be driven or stopped independently of each other, one by each motor, and the pressure of the fuel discharged from the high pressure fuel pump is made variable by a combination of the drive or stop of the low pressure fuel pump and the drive or stop of the high pressure fuel pump.

Abstract: A redundant array pumping system and control system is provided for water rides for ensuring continuous and non-disruptive supply of water. The pumping system incorporates a redundant pump and filter array in conjunction with a nozzle system for injecting water onto a ride surface. The nozzle system may incorporate a plurality of redundant or quasi-redundant nozzles. The hydraulic system can include many levels of redundancy as applied to its various components, such as pumps, filters and nozzles. Additionally, the system can be equipped with a plurality of pressure and flow sensors for monitoring and controlling the performance of the pumps, filters and nozzles of the hydraulic system.

Abstract: A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

Abstract: The present invention relates to a chemical liquid feeding device for feeding chemical liquid required in a semiconductor fabrication process, which includes three or more pumps arranged in a line, each pump having different time points of suction stroke an discharge stroke from one another so that the chemical liquid can be fed uniformly without pulsation.

Abstract: A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

Abstract: Apparatus for establishing and controlling a low pressure gas mixture in a vacuum enclosure (8) comprises at least one secondary pump (9) of the molecular, turbomolecular, or hybrid type, followed by at least one primary pump (10), with first control and adjustment means (22) such as a regulation valve (24) for controlling and adjusting the total gas pressure of the mixture of gases in the vacuum enclosure (8) as a function of a total pressure setpoint (27). The apparatus further comprises second control and adjustment means (28) such as a second regulation valve (29a) downstream from the secondary pump (9). The second regulation valve (29a) is controlled as a function of a delivery pressure setpoint (32) to modify the delivery pressure of the secondary pump (9) and thus to adapt its pumping capacity in selective manner.

Abstract: An apparatus includes a transfer unit under an atmospheric condition and having a robot therein; and at least one process chamber connected to one side of the transfer unit with a slot valve there between, and being alternately under a vacuum condition and under an atmospheric condition.

Abstract: A fan unit includes a housing having an air inlet and an air outlet; a first fan and second fan mounted in the air inlet and the air outlet respectively and arranged in tandem so as to generate an air flow; a first valve mounted adjacent to the air inlet for allowing air to flow into the housing and preventing air from flowing out of the housing; and a second valve mounted adjacent to the air outlet for allowing air to flow out of the housing and preventing air from flowing into the housing.

Abstract: The system contains a plurality of conduit segments and at least one electrically-powered pump. At least one conduit connector joins the conduit segments and the electrically-powered pumps, thereby mating at least one fluid path. A plurality of electric power wires are coupled with the conduit segments and connected to the electrically-powered electric pumps. At least one electrical connector, within said conduit connectors, mates corresponding electric power wires between the conduit segments. An electric power source electrically connected to the electrically-powered pump via the electric power wires.

Abstract: A multi-level membrane suction pump having at least two pump chambers is provided, each having a fluid inlet with at least one inlet valve and a fluid outlet with at least one outlet valve, and having a suction line connecting the fluid inlets of the pump chambers. Successive pump chambers are connected to each other via at least one connecting line such that the membrane pump upon reaching/exceeding a differential pressure in the suction line changes from a parallel operation of the pump chambers into at least also a serial operation of the pump chambers. In the inflow and outflow regions of the at least one connecting line, at least one check valve each is interposed, opening toward the subsequent pump stage.

Abstract: A method of operating apparatus for controlling the pressure in a process chamber (10), the apparatus comprising a first pump unit (14) having an inlet in fluid connection with an outlet of said process chamber, and a second pump unit (16) having an inlet in fluid connection with an outlet of the first pump unit via a flow control unit (18) comprising a variable flow control device (20; 28) having variable conductance for controlling outlet fluid pressure at the outlet of the first pump unit, the method comprises controlling speed of the first pump unit to increase the range of chamber pressures over which control of the outlet fluid pressure produces changes in said chamber pressure without exceeding the thermal limit and/or motor stall limit of the first pump unit.

Abstract: Apparatus for establishing and controlling a low pressure gas mixture in a vacuum enclosure (8) comprises at least one secondary pump (9) of the molecular, turbomolecular, or hybrid type, followed by at least one primary pump (10), with first control and adjustment means (22) such as a regulation valve (24) for controlling and adjusting the total gas pressure of the mixture of gases in the vacuum enclosure (8) as a function of a total pressure setpoint (27). The apparatus further comprises second control and adjustment means (28) such as a second regulation valve (29a) downstream from the secondary pump (9). The second regulation valve (29a) is controlled as a function of a delivery pressure setpoint (32) to modify the delivery pressure of the secondary pump (9) and thus to adapt its pumping capacity in selective manner.

Abstract: An invention is claimed that enables the pumping of compressible fluids at high pressures when an accurate flow is desired. Two pressure sources, for example pumps plumbed in series, separate thermodynamic work, such as pressurization, at the first pressure source from a volumetric or matter metering function in the second pressure source. One example is a flowstream delivery for a chemical instrumentation system that is manufactured from relatively unsophisticated pumps yet delivers precise flows with low pulsation (<1 %) over pressures greater than 100 bar. An advantage of one embodiment allows the economical conversion of typical HPLC systems to state of-the-art supercritical fluid chromatography (SFC) systems with minimal modification to system components.

Abstract: The system contains a plurality of conduit segments and at least one electrically-powered pump. At least one conduit connector joins the conduit segments and the electrically-powered pumps, thereby mating at least one fluid path. A plurality of electric power wires are coupled with the conduit segments and connected to the electrically-powered electric pumps. At least one electrical connector, within said conduit connectors, mates corresponding electric power wires between the conduit segments. An electric power source electrically connected to the electrically-powered pump via the electric power wires.

Abstract: The present invention relates to a Pneumatic System that can be employed within the residential environment. The system includes both a section mode and a pressure mode. Both of these modes, in turn, have both a low and a high pressure range. A variety of applications are disclosed for use in conjunction with the various modes of the system. These various applications are described in greater detail hereinafter.

Abstract: A pumping system is disclosed for producing hydrocarbons from a subsea production well with at least one electrical submersible pumping (ESP) hydraulically connected to at least one multiphase pump to boost production fluid flow.

Abstract: A two-stage system for delivering fuel to a gas turbine including a first stage variable pump for serving as a primary source of fuel, a second stage fixed pump for selectively supplementing the variable pump, a bypass valve connected to the fixed pump for loading and unloading the fixed pump and a regulator valve assembly connected to the variable pump and the bypass valve for controlling operation of the variable pump and the bypass valve. Preferably, the two-stage system also includes a control valve connected to the regulator valve assembly for setting a pressure differential across the regulator valve assembly and, thereby, loading and unloading the fixed pump.

Abstract: A compressor system includes a first compressor, which has a first low side oil sump, in a first shell and a second compressor, which has a second low side oil sump, in a second shell. The first and second compressors are connected in series. There is an oil transfer conduit connected between the first low side sump of the first compressor and the second low side sump of the second compressor. The system also includes a normally open check valve in the oil transfer conduit. A method for effecting oil balance in a compressor system, the method includes establishing a first compressor in a first shell having a first low side oil sump and establishing a second compressor in a second shell having a second low side oil sump. The first and second compressors are connected in series. The method also includes positioning an oil transfer conduit between the first low side sump and the second low side sump and positioning a normally open check valve in the oil transfer conduit.

Abstract: A pumping apparatus (1) adapted for delivering fluid against pressure. The pumping apparatus has a plurality of metering devices (3,5) adapted for metering a plurality of different fluids, and has a booster device (7) adapted for increasing the pressure of the fluids metered by the plurality of metering devices (3,5) to said high pressure, and has a damping device (9) adapted for compensating fluctuations of the fluids metered by the plurality of metering devices (3,5). Each device (3,5,7,9) has an inlet (41) and an outlet (43). The outlets of the metering devices are coupled to the inlet (41) of the booster device (7), and the outlet of the booster device (7) is coupled to the inlet of the damping device (9).

Abstract: An apparatus and a method for injecting a liquid dye into a polymer melt, which includes a metering pump with a metering inlet and a metering outlet. The metering inlet connects to a dye tank and the metering outlet connects to a polymer melt carrying component. To add the liquid dye to the polymer melt in the melt carrying component in a quantity that is as uniform and accurate as possible, the invention provides for connecting the metering inlet of the metering pump to a feed outlet of a feed pump, which connects with its feed inlet to the tank. With that, it is possible to generate a feed pressure at the metering inlet of the metering pump, which can be adapted to an injection pressure at the metering outlet of the metering pump.

Abstract: In the invention, the atmosphere in a process chamber is conditioned using a primary pump, a secondary pump, speed control means for controlling the speed of the primary pump, and at least first gas analyzer means adapted for analyzing the extracted gases upstream from the primary pump and for producing first analysis signals. First signal processing means control the pumping speed as a function of the first analysis signals, so as to determine the variation in the pressure inside the process chamber during the transient stages of the treatment. In this way, deposits and turbulence are avoided in the process chamber, as are deposits in the pumping line, so that the secondary pump can be placed in the immediate vicinity of the process chamber.

Abstract: A fuel container for a marine propulsion system is provided with a pump and a hose connected to an outlet of the pump and disposed within the cavity of the fuel container. The hose is provided with an opening, formed through its wall, through which a fluid can flow under certain circumstances. The opening is disposed in an ullage within the container and allows gaseous elements to be purged from the container when flow is induced from the container back to a fuel reservoir.

Abstract: An apparatus 115 for processing a substrate 20, comprises an integrated pumping system 155 having a high operating efficiency, small size, and low vibrational and noise levels. The apparatus 115 comprises a chamber, such as a load-lock chamber 110, transfer chamber 115, or process chamber 120. An integrated and local pump 165 is abutting or adjacent to one of the chambers 110, 115, 120 for evacuating gas from the chambers. The pump has an inlet 170 connected to a chamber 110, 115, 120, and an outlet 175 that exhausts the gas to atmospheric pressure. Preferably, the pump 165 comprises a pre-vacuum pump or a low vacuum pump.

Abstract: An apparatus 115 for processing a substrate 20, comprises an integrated pumping system 155 having a high operating efficiency, small size, and low vibrational and noise levels. The apparatus 115 comprises a chamber, such as a load-lock chamber 110, transfer chamber 115, or process chamber 120. An integrated pump 165 is abutting or adjacent to one of the chambers 110, 115, 120 for evacuating gas from the chambers. In operation, the pump is located within the actual envelope or footprint of the apparatus and has an inlet 170 connected to a chamber 110, 115, 120, and an outlet 175 that exhausts the gas to atmospheric pressure. Preferably, the integrated pump 165 comprises a pre-vacuum pump or a low vacuum pump and is housed in a noise reducing enclosure having means for moving the pump between locations and means for stacking pumps vertically in use.

Abstract: An arrangement for supplying liquid media to consumers of a fuel cell system having a feed pump is suggested which is less complex compared to known arrangements. This is achieved in that controllable metering valves (22) are provided between the feed pump (21) and the respective consumers.

Abstract: A redundant array pumping system and control system is provided for water rides for ensuring continuous and non-disruptive supply of water. The pumping system incorporates a redundant pump and filter array in conjunction with a nozzle system for injecting water onto a ride surface. The nozzle system may incorporate a plurality of redundant or quasi-redundant nozzles. The hydraulic system can include many levels of redundancy as applied to its various components, such as pumps, filters and nozzles. Additionally, the system can be equipped with a plurality of pressure and flow sensors for monitoring and controlling the performance of the pumps, filters and nozzles of the hydraulic system.

Abstract: A primary-secondary pumping system for HVAC systems wherein the common pipe is configured so that there is at least a 4 ft pressure drop across the length of the common pipe and that all thermal plants see the same temperature of water entering the thermal plants and that return water sees the pressure drop of the common pipe before it sees the chilled (or heated) water leaving the thermal plant and the suction of the secondary pumps.

Abstract: A gas-circulating processing apparatus which comprises a processing chamber, a gas feeding piping, a gas supply piping, a first exhaust mechanism discharging a gas from the processing chamber, a second exhaust mechanism discharging a portion of a gas discharged from the first exhaust mechanism, a back pressure adjusting mechanism interposed between the first exhaust mechanism and the second exhaust mechanism to adjust a back pressure of the first exhaust mechanism, and a gas circulating piping which is configured to combine another portion of the gas that has been discharged from the first exhaust mechanism with a processing gas supplied from the gas supply piping, wherein the gas feeding piping has a larger inner diameter than that of the gas supply, or the processing gas is introduced into the first exhaust mechanism, or a first heater is provided to heat at least part of the circulating route.

Abstract: An apparatus 115 for processing a substrate 20, comprises an integrated pumping system 155 having a high operating efficiency, small size, and low vibrational and noise levels. The apparatus 115 comprises a chamber, such as a load-lock chamber 110, transfer chamber 115, or process chamber 120. An integrated pump 165 is abutting or adjacent to one of the chambers 110, 115, 120 for evacuating gas from the chambers. In operation, the pump is located within the actual envelope or footprint of the apparatus and has an inlet 170 connected to a chamber 110, 115, 120, and an outlet 175 that exhausts the gas to atmospheric pressure. Preferably, the integrated pump 165 comprises a pre-vacuum pump or a low vacuum pump and is housed in a noise reducing enclosure having means for moving the pump between locations and means for stacking pumps vertically in use.

Abstract: The present invention relates to a gel hydration tank and method for hydrating gels for use in oil well treatment operations according to which a mixture of water and gel is introduced into the interior of the tank and flows through the tank before being discharged from the tank, whereby specific devices are used to deflect and/or re-direct fluid flow so as to increase the distance traveled for a given fluid volume element, which consequently increases the plug flow efficiency of the tank.

Abstract: A fuel transfer apparatus for providing fuel to a vehicle engine from a plurality of fuel tanks. A transfer pump is positioned intermediate a pair of fuel tanks and is operable to transfer fuel therebetween. Fuel is provided to the engine from a first one of the two fuel tanks. Excess fuel is returned to the first one of the two fuel tanks. When the level in the first fuel tank is less than the level in the second fuel tank by a predetermined amount, the transfer pump transfers an amount of fuel from the second fuel tank to the first fuel tank. Fuel level sensors are utilized to monitor the level of fuel in the two fuel tanks and report to a microprocessor which controls the transfer pump. The microprocessor utilized to control the transfer pump may be incorporated into the transfer pump, may be a stand alone microprocessor, or may comprise an existing vehicle circuit board such as, e.g., the electronic control module (ECM). A fuel transfer line interconnects the two tanks and is located above the two tanks.