Abstract: According to an embodiment, a device for directing the flow of a fluid comprises: a fluid chamber; a first outlet; a second outlet; a first outlet fluid passageway, wherein the first outlet fluid passageway is operatively connected to the first outlet; and a second outlet fluid passageway, wherein the second outlet fluid passageway is operatively connected to the second outlet; wherein the fluid rotationally flows about the inside of the chamber, and wherein the fluid flowing through the first outlet fluid passageway conjoins with the fluid flowing through the second outlet fluid passageway at a point downstream of the first and second outlet.

Abstract: A flow modulator to control the flow of an aerosol to an aerosol detection and/or monitoring system and other aerosol flow systems includes a chamber having an inlet and an outlet, a diverging section of the chamber beneath the inlet that has a flow divider at the center to divide the aerosol into fractions, a recirculation section in which the divided aerosol fractions are recombined, and a converging section that channels the recombined aerosol fractions to the outlet of the chamber.

Abstract: A device for applying a treatment fluid to a target includes an application chamber that defines a substantially laminar application flow path from an inflow region to an outflow region of the application chamber; and a distribution chamber that communicates with the application chamber at an interface, in use, fluid being delivered from the distribution chamber to the application chamber via the interface across the full extent of the inflow region of the application chamber. A process for applying treatment fluid to a target region of a component surface using a treatment device operable to present the treatment fluid to the component surface is also disclosed. The process comprises introducing the treatment device to the target region of the component surface, and drawing treatment fluid through the device, across the target region of the component surface solely under the action of reduced pressure applied at an outlet of the device.

Abstract: A method of manufacturing a fluidic oscillator insert for use in a subterranean well can include forming the insert with a conical surface thereon, and forming at least one fluidic oscillator on the conical surface. A well tool can include a housing assembly, at least one insert received in the housing assembly, the insert having multiple fluidic oscillators formed therein, and wherein the fluidic oscillators produce oscillations in response to fluid flow through the fluidic oscillators. An insert for use in a well tool can include an exterior conical surface, at least one fluidic oscillator formed on the conical surface, and wherein the fluidic oscillator produces oscillations in response to fluid flow through the fluidic oscillator.

Abstract: One exemplary embodiment may be a distribution tray for a vessel. Generally, the distribution tray includes a member, a compartment, and an insert. The member can form a first side and a second side. Typically, the first side is adapted to receive a liquid thereon. Additionally, the member can form a plurality of openings. Usually, the compartment extends through the member with a first portion protruding from the first side and a second portion protruding from the second side, and is adapted to permit the passage of a fluid there-through. The insert may be positioned within the compartment to constrict and then expand the passage of the fluid there-through.

Abstract: A fluid distributor unit comprising a channel system where one or more inlet channels (2) starting on an inlet side (3) of the distributor unit branch out successively into several channels (6) ending on the other side of the distributor unit, called the outlet side (4), characterised in that said distributor unit is provided in one single body (1) by free form fabrication.

Abstract: A pair of dozer control valves V3, V6 concurrently operable; a pilot pressure valve V14 switchable between an independent position 27 where, when only track devices 5 are operated, discharged fluid from one hydraulic-fluid discharge port P1 is independently supplied to one track control valve and one dozer control valve, and discharged fluid from the other hydraulic-fluid discharge port P2 is independently supplied to the other track control valve and the other dozer control valve, and a merging position 28 where, when the other control valves are operated, discharged fluid from the one hydraulic-fluid discharge port and from the other hydraulic-fluid discharge port are merged and supplied to the control valves V1 to 10; and pressure compensation valves V11 in the control valves and for distributing hydraulic fluid at flow rates based on extent of actuation of the other control valves operated, irrespective of the magnitude of the loads.

Abstract: Embodiments of the invention provide apparatuses and methods for atomic layer deposition (ALD), such as plasma-enhanced ALD (PE-ALD). In some embodiments, a PE-ALD chamber is provided which includes a chamber lid assembly coupled with a chamber body having a substrate support therein. In one embodiment, the chamber lid assembly has an inlet manifold assembly containing an annular channel encompassing a centralized channel, wherein the centralized channel extends through the inlet manifold assembly, and the inlet manifold assembly further contains injection holes extending from the annular channel, through a sidewall of the centralized channel, and to the centralized channel.

Abstract: A hydraulic supply unit for lubricating and/or cooling mechanical and electrical components disposed in the nacelle of a wind power plant, and for supplying hydraulic actuating devices with hydraulic fluid, characterized by a tank that is divided into chambers and has a first chamber for providing oil lubricating the gearbox of the wind power plant, a second chamber for providing hydraulic oil used to operate hydraulic actuating devices of the wind power plant, a first connection for connecting the first chamber to a line for supplying the gearbox with lubricating oil, and a second connection for connecting the second chamber to a line for supplying the hydraulically operated actuating devices with hydraulic oil, and a heat exchanger for dissipating heat from the hydraulic oil, the gearbox oil and a coolant that is fed to the heat exchanger and absorbs lost heat at the electrical components of the wind power plant.

Abstract: A fuel cell stack system is configured to uniformly supply a fuel or an electrolytic solution to each of fuel cell elements, and an electronic device using the fuel cell stack system are provided. An electrolytic solution channel allowing an electrolytic solution to flow therethrough is arranged between a fuel electrode and an oxygen electrode, and a fuel channel allowing a fuel to flow therethrough is arranged outside of the fuel electrode. The electrolytic solution channels and the fuel channels of all fuel cell elements are connected in series to one another. That is, the fuel or the electrolytic solution emitted from an outlet of the fuel channel or the electrolytic solution channel of one fuel cell element enters into an inlet of the fuel channel or the electrolytic solution channel of the next fuel cell element through a connection channel.

Abstract: An integrated processing tool is described comprising a full-wafer processing module and a combinatorial processing module. Chemicals for use in the combinatorial processing module are fed from a delivery system including a set of first manifolds. An output of each first manifold is coupled to at least one mixing vessel. An output of each mixing vessel feeds more than one of a set of second manifolds. An output of each set of second manifolds feeds one of multiple site-isolated reactors of the combinatorial processing module.

Abstract: Trim disk assemblies for use in fluid flow control devices include a first disk and a second disk. An elongated void is formed in a surface of each of the first disk and the second disk. The second disk is aligned with the first disk to provide fluid communication between the void of the first disk and the void of the second disk, the void of the first disk being offset or staggered from the void of the second disk. The void of the first disk and the void of the second disk at least partially define a fluid passageway having a cross-sectional area characterized by increases and decreases in cross-sectional area, which define an expansion/contraction mechanism of the fluid passageway.

Abstract: A high integrity protection system (HIPS) for protection of a pipe downstream of a wellhead includes an inlet connected to the wellhead; outlet connected to the downstream pipe; two sets of two series-connected surface safety valves (SSVs) in fluid communication with the inlet and outlet, the sets being in parallel fluid flow relation to each other, either one or both of the sets of SSVs operable as a flowpath for fluids entering the inlet and passing through the outlet to the downstream pipe; two vent control valves (VCVs), each connected to piping intermediate one set of series-connected SSVs, the VCVs being in fluid communication with a vent line, whereby, upon opening of a VCV, process pressure between the two SSVs is vented; a signal-generating safety logic solver, in accordance with preprogrammed safety and operational protocols; and pressure sensing transmitters attached to piping upstream of the HIPS outlet.

Abstract: A slurry dividing apparatus is configured to divide a main slurry stream into smaller constituent slurry streams, wherein each stream contains a desired proportion of suspended solids. The dividing apparatus includes a main flow channel and a plurality of branch flow channels extending upward from a flow divider that terminates an upper end of the main flow channel. The main slurry stream enters the main flow channel, at an inlet opening thereof, and is decelerated, by an upward extension and expanding cross-section of the main flow channel, before reaching the flow divider and being divided into the smaller constituent slurry streams flowing within the plurality of branch flow channels. Each of the smaller streams flows up and then over a weir, which extends across an upper portion of each of the branch flow channels, and then down into a corresponding discharge flow channel of the apparatus.

Abstract: An electronic module is provided having enhanced thermal cooling of electronics. The module includes a housing, electronic circuitry contained within the housing, and a fluid cooling chamber extending through the housing. The chamber has generally conical shaped portions at opposite ends. At least one thermal cooling insert extends into the chamber. The insert comprises a plurality of projections for forming fluid flow passages between adjacent projections, wherein the projections engage the generally conical shape portion of the chamber.

Abstract: A medium supply system of an exhaust gas cleaning device for treating the exhaust gas of an internal combustion engine comprising a storage tank and a supply line which is connected to the storage tank for supplying the medium to a dosing unit connected to an exhaust pipe and to a recycling line for recycling the medium to the storage tank. The supply line and/or the recycling line are provided with at least one conduit area comprising at least one first and second parallel partial channels for the medium circulation, wherein said partial channels exhibit different insulation properties. An exhaust gas cleaning device comprising the inventive supply system and a method for the operation thereof are also disclosed.

Abstract: An object of the present invention is to provide a combustion apparatus equipped with a pilot burner and a main burner capable of establishing a stable combustion state without involving generation of CO and unburned substances at the main burner even when the supply of a gas fuel to the pilot burner is stopped. A combustion apparatus equipped with a pilot burner and a main burner according to the present invention is characterized in that, when the main burner is in a combustion state, the amount of air supplied to the pilot burner can be adjusted. Here, the amount of air supplied to the pilot burner is an amount allowing the pilot burner to be cooled.

Abstract: Disclosed is a method and device for manufacturing an optical preform. The method includes supplying dopant-containing glass-forming gases to the interior of a hollow glass substrate tube. Furthermore, the supply flow of dopant-containing glass-forming gases includes a main gas flow and one or more secondary gas flows. The secondary gas flows are divided into subflows, which are supplied to the interior of the hollow glass substrate tube together with the main gas flow. The method further includes effecting deposition of glass layers on the interior surface of the hollow glass substrate tube.

Abstract: A branching device or transition apparatus for controlling pulsation of a fluid in a piping system includes at least one large flow channel, at least two small flow channels, and at least one divider that transitions the single large flow channel into the two small flow channels internally, wherein the wall surfaces of the internal ports are generally smooth and continuous, and wherein the divider is adapted to prevent the creation of significant disturbances in fluid flow patterns through the device Typically the area of each of the small flow channels can be between about 25% to about 75% of the large flow channels, and the branching device can safely withstand pressures of between about 125 psig to about 2500 psig.

Abstract: A pressure regulating valve includes a body having an outer surface, the interior of the body defining an inlet chamber adapted to receive a fluid at a process pressure, and an outlet chamber. The body includes at least one inlet passage communicating with the inlet chamber and the outer surface, and at least one outlet passage communicating with the outer surface and the outlet chamber. A reference housing is adapted to be disposed in fluid communication with a fluid at a predetermined reference pressure. An annular membrane is disposed between the body and the reference housing, so as to circumscribe the inlet and outlet passages. The membrane is arranged such that, when the reference pressure is higher than the process pressure the membrane engages at least one outlet passage, and when the process pressure is higher than the reference pressure, the membrane is not engaged with the outlet passage.

Abstract: An electromagnetically actuatable valve for brake systems in motor vehicles, comprises a hydraulic part and an electric part. The valve is partially placed inside a valve block, in which an inlet borehole and an outlet borehole for a hydraulic fluid are made. The hydraulic part comprises a valve element inside of which a transversal borehole is made that communicates with the inlet borehole. In addition, a number of longitudinal boreholes, which are connected to the outlet borehole, are made in the valve element. The transversal borehole and the longitudinal boreholes are connected via a closing element. The valve enables a controlled opening and closing of the closing element thereby making a low-noise switching of the valve possible.

Abstract: Treatment devices for fluid such as water are described. Principally (although not necessarily exclusively) designed for use as chlorinators, the devices may divert water flowing in conduits into the devices for treatment and subsequent return to the flow stream. A return tube of the device may be designed to create vortex action, using a pressure differential to evacuate treated water from the device back into the conduit.

Abstract: Gas manifold (1) for a cooking device that includes a distributor conduit (2) of a gas flow (Q) formed by a cylindrical pipe of a certain uniform diameter (D1) fitted with a plurality of regulation taps (3), and that is provided with a manually operated emergency tap (4) at the gas inlet, with a cut-off valve (10) disposed in parallel in relation to the distributor conduit (2), in which a seal device (13) of the passage of the flow (Q) is intercalated in the interior of the conduit (2) between an inlet (8) and an outlet (9) of the emergency tap (4), as a result of which all the flow (Q) is diverted to the emergency tap (4), thereby bypassing the seal device (13). The sealing of the distributor conduit (2) is made by means of a circular disc (14) and a ring sealing gasket (15).

Abstract: A submersible gas burner includes a pilot burner, a closed gas reservoir, and a first and second main burners. The pilot burner has a pilot burner tube with a closed upper end, an open lower end and a pilot gas inlet adjacent the upper end. The pilot burner provides a downwardly directed pilot flame. The closed gas reservoir has an upper end, a lower end, and a main gas inlet above the lower end. The main burners are coupled to the gas reservoir with upper ends adjacent the pilot burner and opposing lower ends coupled to the gas reservoir. The lower end of the first main burner is further from the lower end of the gas reservoir than the main gas inlet while the lower end of the second main burner is closer to the lower end of the gas reservoir than the main gas inlet.

Abstract: A plant with piping mounted on branch pipe, wherein said piping which introduces gas has a nozzle portion as a joint portion to a vessel and a branch portion connected with a branch pipe; and wherein an enlarged passage portion is formed at least at one of said branch portion and said nozzle portion, and a passage sectional area of said enlarged passage portion is larger than that of said piping other than said enlarged passage portion. Since the flow velocity of the gas flowing inside slows down at the enlarged passage portion, the occurrence of acoustic resonance at the branch portion or the nozzle portion can be suppressed. Accordingly, the fluctuation pressure of the gas flowing in the piping can be reduced even more.

Abstract: An arrangement for testing a fire suppression sprinkler system includes a supply conduit for supplying a fire suppression fluid to a plurality of sprinklers. A sensor senses a flow of fire suppression fluid through the supply conduit. A drain conduit drains fire suppression fluid when the fire suppression system is tested. A drain valve controls the flow of the fire suppression fluid so that when the fire suppression system is tested the fire suppression fluid is controlled to enter the drain conduit. A fire suppression fluid collection tank collects the fire suppression fluid which has entered the drain conduit for reintroducing the collected fire suppression fluid to the supply conduit. A circulation valve controls the flow of the fire suppression fluid so that when the fire suppression system is tested the fire suppression fluid enters the fire suppression fluid collection tank.

Abstract: A fluid chip has a liquid support 25 for supporting a liquid 24, a fluid passage 22 formed by being surrounded by the liquid support 25 and through which the liquid 24 moves, and a plurality of magnetic particles 21 disposed in the fluid passage 24. The magnetic particles 21 are aggregated by a permanent magnet 23 so as to block the fluid passage 22 and thus cut off flow of the liquid 24. The magnetic particles 21 are dispersed along a part of a wall of the fluid passage 22 so as to open the fluid passage 22 and thus allow the liquid 24 to flow.

Abstract: Mixing devices comprise a mixing element having a body with a fluid inlet port, and a fluid outlet port that is separated from the fluid inlet port. Fluid outlet passages extend through a body wall section defining the fluid inlet port, and fluid inlet passages extend through a body wall section defining the fluid outlet port. The body includes an outside surface having a reduced diameter section, and the fluid inlet and outlet passages are positioned axially along the reduced diameter section. The mixing element is statically disposed within an internal chamber of a housing, and an annular volume is defined between an inside surface of the internal chamber and the mixing element reduced diameter section to facilitate passage and mixing of fluid within the annular volume. The mixing element total inlet area is approximately equal to its total outlet area to minimize unwanted pressure drop.

Abstract: A branching device or transition apparatus for controlling pulsation of a fluid in a piping system includes at least one large flow channel, at least two small flow channels, and at least one divider that transitions the single large flow channel into the two small flow channels internally, wherein the wall surfaces of the internal ports are generally smooth and continuous, and wherein the divider is adapted to prevent the creation of significant disturbances in fluid flow patterns through the device Typically the area of each of the small flow channels can be between about 25% to about 75% of the large flow channels, and the branching device can safely withstand pressures of between about 125 psig to about 2500 psig.

Abstract: A system, apparatus, and method for attenuating pulsations in a pumping system.

Abstract: A drinking water fountain includes a valve body, a heating device, a control valve, a cold water inlet conduit, a cold water outlet conduit, a heating conduit, and a hot water inlet conduit. Thus, the drinking water fountain can provide drinking water, including cold water, hot water and mixed water. In addition, the control valve is used to control the drinking water flowing outward from the water outlet pipe, including cold water, hot water and mixed water, thereby facilitating a user drinking the drinking water.

Abstract: There is provided an exhaust pressure-adjusting valve that is brought into a closed position due to a biasing force of a resilient body and is opened against the biasing force of the resilient body due to the exhaust pressure in an exhaust channel, which is raised in response to the closing of a throttle valve, in which valve-opening area is increased or decreased according to the displacement of the resilient body, to thereby adjust the exhaust pressure. The exhaust pressure-adjusting valve has a unit for changing the growth rate of the valve-opening area, which gradually heightens the growth rate of the valve-opening area with respect to the displacement of the resilient body in a valve-opening direction.

Abstract: Known apparatuses for pumping fuel have at least two suction jet pumps, which each have one drive nozzle and one collection conduit and mixing conduit located downstream of the drive nozzle. A disadvantage is that the parallel suction jet pumps require a large amount of installation space, are embodied very massively, and therefore require a large amount of injection-molding compound for their manufacture. In the apparatus of the invention, the production costs and the required installation space for the suction jet pumps are reduced. According to the invention, the drive nozzles are surrounded by a single collection conduit, narrowing conically in the flow direction and located upstream of the mixing conduits.

Abstract: A method for transporting an easily polymerizable liquid by a pipeline having branches, wherein among pipelines branched at a branch point, one pipeline which may not be used over a long period of time, is provided with a valve to close the pipeline, within 500 mm from the branch point.

Abstract: A throttle valve device for a pneumatic power tool comprises a casing (10) with an air inlet passage (11), an air outlet passage (12), a valve chamber (13) with a main valve seat (14) and a main valve element (15), and a manually shiftable activating rod (21) which is sealingly guided in a lateral guide way (19) and arranged to engage and displace the main valve element (15) off the main seat (14), wherein the activating rod (21) has a valve portion (27,28) for co-operation with a secondary valve seat (24) in the guide way (19) for controlling a bypass passage (23,24,29) extending between the inlet passage (11) and the outlet passage (12) such that the activation rod valve portion (27,28) is separated from the secondary valve seat (24) and opens up the bypass passage (23,24,29) before the activation rod (21) engages and displaces the main valve element (15) off the main seat (14) when operating the activation rod (21) in the opening direction.

Abstract: A flow control includes a conduit and a flow control washer disposed in the conduit between the conduit's inlet and the outlet. A gas inlet passage opens into the conduit, preferably at a location just downstream of the flow control washer, to permit a gas (typically ambient air) to enter a liquid stream flowing through the flow control washer. The admission of a gas into this liquid stream reduces noise generated by liquid flow through the flow control washer. Gas induction and noise reduction capabilities may be enhanced by admitting the gas fluid into a low pressure region of a venturi located in the conduit downstream of the flow control washer. The flow control is particularly useful in a wastewater drain of a water softener control valve, but is also useful in a variety of other applications. A method of reducing noise in a flow control is also provided.

Abstract: The present invention provides a hybrid material and a method for forming a hybrid material comprising actuator made from a stimuli responsive polymer mounted in a porous framework. The present invention also provides devices employing the actuator of the present invention.

Abstract: A method to reduce or attenuate the amplitude of time-variant properties of a fluid stream by introducing the stream into a defined enclosed volume in a controlled manner such that the residence time distribution of the fluid exiting the enclosed volume approaches that of a preferred flat residence time distribution. This is accomplished by the concept of temporal mixing in which different residence times are imparted to a fluid in a mixing zone by physically dividing the fluid into individual portions, each of which has a different residence time while passing through the mixing zone. The desired fluid portions are created by means of specifically-designed multiple inlets into the mixing zone and/or by means of specifically-designed multiple outlets from the mixing zone.

Abstract: A valve is provided which includes a valve body, a first valve member, and a second valve member. The valve body has a first flow passage formed therethrough and a second flow passage formed therein. The second flow passage has a smaller cross-sectional area than the first flow passage so that the valve can be used interchangeable between systems requiring different flow rates through the valve, and so that flow through the valve can be more accurately controlled than through the first flow passage alone.

Abstract: The present invention provides a hybrid material and a method for forming a hybrid material comprising actuator made from a stimuli responsive polymer mounted in a porous framework. The present invention also provides devices employing the actuator of the present invention.

Abstract: Apparatus and process for guiding portions of backwater produced or stored at different levels of a machine. The apparatus includes an upper backwater chamber arranged to receive first backwater, a lower backwater chamber arranged below the upper backwater chamber and to receive at least a portion of the first backwater from the upper backwater chamber. A plurality of hydraulic lines are arranged to couple the upper backwater chamber to the lower backwater chamber, and inlet openings of the plurality of hydraulic lines are arranged inside the upper backwater chamber and are arranged at different geodetic heights relative to one another. The process includes collecting first backwater in an upper backwater chamber, and guiding the first backwater from the upper backwater chamber to a lower backwater chamber through inlet openings to a plurality of hydraulic lines. The inlet openings are arranged at different geodetic heights relative to one another.

Abstract: The present invention provides a hybrid material and a method for forming a hybrid material comprising actuator made from a stimuli responsive polymer mounted in a porous framework. The present invention also provides devices employing the actuator of the present invention.

Abstract: A fluid driving system for portable flow cytometers or other portable devices that accepts a less precise and less stable pressure source, and then adjusts the pressure in a closed-loop manner to maintain a constant, desired flow velocity. The fluid driving system may be used in portable or wearable cytometers for use in remote locations, such as at home or in the field.

Abstract: A method and device for transferring a multiphase flow to a predetermined location through a pipe. The multiphase flow is comprised of at least a liquid phase and a gas phase. The multiphase flow is provided to a flow divider that diverts a gas portion from the multiphase flow. A compressor and a pump are in fluid communication with the flow divider. The main gas portion is boosted by the compressor, and the residual liquid/gas portion is boosted by the pump. A recombination manifold then recombines the gas portion and the residual liquid portion. A single pipe receives the recombined multiphase flow and transfers it to a predetermined location.

Abstract: Various types of valves are disclosed, as well as the use of the same in a reaction control system for space travel vehicle applications. Multiple functions are provided by one of these valve designs by providing multiple flowpaths through the valve. An inflow and outflow tube of this multifunctional valve are fluidly interconnected with first and second chambers, respectively, within the valve. These first and second chambers are isolated from each other by a barrier assembly which may be “removed” at the desired type by a barrier rupture assembly to provide one of the noted multiple flowpaths (i.e., the inflow tube, the first chamber, the second chamber, and the outflow tube). A separate service port is fluidly interconnected with each of the first and second chambers, and a separate service valve may be disposed in each of these service ports to provide additional flowpaths for the multifunctional valve.

Abstract: A circulation control valve includes a top sub having a bore, a body connected to the top sub and having a first fluid passageway and a second fluid passageway parallel to the first fluid passageway, the bore communicating with both the first fluid passageway and second fluid passageway, a one-way valve in the second fluid passageway, and a first activatable block for the first fluid passageway. Upon upon activation of the block, fluid in the first fluid passageway is blocked and only flows through the second fluid passageway.

Abstract: An improved oil and gas well servicing apparatus for blending and delivering a slurry of fracturing fluid and particulate matter at constant flow rate and pressure to a downhole pump is disclosed. Multiple blending tubs are mounted on a trailer or skid and are manifolded together in a slurry discharge manifold. The slurry discharge manifold combines the slurry discharged by the blending tubs and incorporates pipe sections of equal length to connect the blending tubs to the manifold. It is believed that the slurry discharge manifold and equal length piping provide balanced pressure drop between the individual blending tubs and creates a constant outlet pressure from the slurry discharge manifold. A fluid intake manifold may also be included to distribute fracturing fluid to the blending tubs. Hose connectors on each of the manifolds are provided on both sides of the apparatus for convenient operation from either side.

Abstract: A method and device for transferring a multiphase flow to a predetermined location through a pipe. The multiphase flow is comprised of at least a liquid phase and a gas phase. The multiphase flow is provided to a flow divider that diverts a gas portion from the multiphase flow. A compressor and a pump are in fluid communication with the flow divider. The main gas portion is boosted by the compressor, and the residual liquid/gas portion is boosted by the pump. A recombination manifold then recombines the gas portion and the residual liquid portion. A single pipe receives the recombined multiphase flow and transfers it to a predetermined location.

Abstract: An on-off device disposed at each of the inlet and the outlet of a fluid controller is one of five kinds of on-off devices, i.e., on-off device having a two-port valve, on-off device having a two-port valve and a three-port valve, on-off device having a two-port valve and two three-port valves, on-off device having two three-port valves, and on-off device having three three-port valves. The main bodies of two-port valves of all types of on-off devices are identical in configuration and each have an inlet and an outlet in a bottom face thereof. Main bodies of three-port valves of all types of on-off devices are identical in configuration and each formed in a bottom face thereof with an inlet, an outlet always in communication with the inlet, and an inlet-outlet subopening.

Abstract: A protective device for a hydraulic system includes a block which forms a housing with at least one fluid flow inlet into the housing and at least one fluid flow outlet. A plurality of fluid flow channels within the housing connect the inlet and the outlet. Each of the fluid flow channels contain a hydraulic fuse adapted to close its associated fluid flow channel when a selected flow rate of hydraulic fluid is exceeded, each of the fuses having a different selected fluid flow rate which causes closure thereof. A valve in each of the fluid flow channels provides for selectively opening and closing the fluid flow channels so that a selected one of the channels is open and all others of the channels are closed. The valves may be integral with single rotatable valve stems, or of various alternative designs, for example, maunually, mechanically or electronically controlled valves.