A hydraulic control system for vehicles is provided. A switching valve (34) that is adapted to provide a communication between an electric oil pump (25) and a drain passage while inhibiting a delivery of the oil from the electric oil pump (25) to the control object (20, C) when an output pressure of the mechanical oil pump (9) is higher than a predetermined level, and to provide a communication between the electric oil pump (25) and the control object (20, C) through a predetermined oil passage when an output pressure of the mechanical oil pump (9) is lower than the predetermined level. The electric oil pump (25) discharges oil before establishing the communication between the electric oil pump (25) and the control object (20, C) as a result of reduction in the output pressure of the mechanical oil pump (9) to be lower than the predetermined level.

Discussed herein are systems, apparatuses, and methods for reversing a flow through a conduit loop. A system may include a flow reversing loop having an inlet, an outlet in communication with a drain, a first port on a first side of the flow reversing loop, and a second port on a second side of the flow reversing loop, the first and second sides separated by the inlet and outlet, a conduit loop including one or more flow paths, wherein the flow reversing loop includes a first flow path from the inlet to the first port so that the treatment fluid can flow through the conduit loop in a first direction to the outlet of the flow reversing loop, and a second flow path from the inlet to the second port so that the treatment fluid can flow to the drain in a second direction, opposite of the first direction.

In one representative example, a water delivery apparatus includes a chassis and a water system supported on the chassis. The water system is substantially lead-free and adapted for use with potable water. The system includes a manifold adapted to convey and/or contain water in a substantially leak- proof manner. The manifold extends between an intake connection and a distal terminus valve. The system also includes first, second and third outlet legs and a pump adapted to induce water flow within the manifold principally from the intake connection to one or more of the outlet legs. The system also includes a pressure switch, an accumulator tank and a cycle to stop valve, all of which are operatively connected to the manifold.

An evacuation method used for a vacuum processing apparatus including a vacuum processing chamber is provided. The vacuum processing chamber is evacuated by an exhaust device for a first predetermined period of time by opening a valve connecting the exhaust device with the vacuum processing chamber. A pressure in the vacuum processing chamber is urged to increase by closing the valve and leaving the valve closed for a second predetermined period of time after evacuating the vacuum processing chamber. Evacuating the vacuum processing chamber and urging the pressure in the vacuum processing chamber to increase are performed so as to reduce the pressure in the vacuum processing chamber to a pressure between 6.7 Pa and 13.310.sup.2 Pa (between 5 Torr and 10 Torr) without freezing moisture in the vacuum processing chamber.

A system for monitoring flow conditions of fluid flowing from a product container through a solenoid pump. The system includes at least one solenoid pump comprising a solenoid coil, which, when energized, produces a stroke of the solenoid pump, at least one product container connected to the at least one solenoid pump wherein the at least one solenoid pump pumps fluid from the at least one product container during each stroke, at least one PWM controller configured to energize the at least one solenoid pump, at least one current sensor for sensing the current flow through the solenoid coil and producing an output of the sensed current flow, and a control logic subsystem for controlling the flow of fluids through the solenoid pump by commanding the PWM controller and for monitoring the current through the solenoid pump by receiving the output from the current sensor, wherein the control logic subsystem uses the measured current flow through the solenoid coil to determine whether the stroke of the solenoid pump is functional.

A swing chamber pump can be situated within a horizontal wellbore for pumping wellbore fluids to surface using a power gas. The pump has two fluidly independent and separate pump chambers, each having a self-orienting gas valve and a self-orienting fluid outlet. A switch alternately directs the power gas into a chamber for conveying stored fluid therein to a production string, while the other chamber passively fills with wellbore fluids. A latency device converts a continuous motion into a sudden snap actuation of the switch and controls a period of delay between the actuation of the switch.

A fuel pump includes an intake valve unit which is provided between a low-pressure chamber and a pressurizing chamber. The intake valve unit includes an intake valve configured to move in an axial direction of the intake valve unit and a valve stopper arranged between the intake valve and the pressurizing chamber. A plurality of fuel passages configured to allow fuel to communicate between the low-pressure chamber and the pressurizing chamber are formed on a radially outward of an outer peripheral surface of the valve stopper.

Method and apparatus for furnishing process machines with liquid color from a supply thereof provides a loop conduit having respective ends receiving liquid color from the supply and discharging liquid color back into the supply, pumping liquid color through the loop conduit and discharging liquid color from the loop conduit at an intermediate position into a reservoir associated with a process machine upon liquid color level in the reservoir being at a low level limit.

A flow control device is disclosed. The flow control device includes a solenoid, the solenoid including an armature. Also, a piston connected to the armature. The piston includes a primary orifice. The piston having an open position and a closed position. A piston spring connected to the piston is also includes and at least one secondary orifice. The movement of the piston to the open position at least partially opens the at least one secondary orifice and the movement of the piston to the closed position at least partially closes the at least one secondary orifice. The movement of the armature actuates the piston movement and controls fluid flow from the primary orifice through the at least one secondary orifice.

The present application relates to a switching valve, a switching hydraulic system, and a crane, in which the switching valve having an oil inlet and an oil outlet comprises at least two pairs of valve oil ports, a pair of cartridge valves provided between each pair of valve oil ports, and the oil inlet and the oil outlet are controlled such that the oil inlet and the oil outlet are capable of shifting between communications with the at least two pairs of valve oil ports. The switching valve switches on and off communication between the oil inlet and the oil outlet and the at least two pairs of valve oil ports by controlling opening or closing of the cartridge valves.