Abstract: A scroll compressor is disclosed. The scroll compressor may include a back pressure hole formed through a non-orbiting scroll and a back pressure chamber assembly such that a compression chamber and a back pressure chamber communicate with each other. A back pressure valve may be disposed inside of the back pressure hole and move along a longitudinal direction of the back pressure hole by a pressure difference between the compression chamber and the back pressure chamber, to vary a flow path area of the back pressure hole. The back pressure valve may include a valve body that extends in an axial direction and a plurality of holes formed through the valve body in the axial direction. With the configuration, pressure pulsation in the back pressure chamber may be suppressed or prevented.

Abstract: The present disclosure provides a microbubble generation container and a water discharging device. The container includes a barrel main body, an excitation member and an elastic member. The barrel main body is provided with a water inlet, a water outlet and a connecting port. The excitation member is movably arranged in the barrel main body, and includes a partition plate and a sealing portion. The partition plate divides an inner space of the barrel main body into a first chamber and a second chamber, and a water passage for communicating the first chamber with the second chamber is arranged on the partition plate. The water passage enables water flowing by to form water droplets and be ejected. The sealing portion opens and closes the connecting port with a motion of the excitation member.

Abstract: The flow rate control device includes a main plate corresponding to an inner diameter and including a through hole which is formed at the center thereof and through which a fluid flows, a sub-plate corresponding to a size of the through hole, disposed in front of the main plate, and applied with a pressure of the flowing fluid, and an expansion and contraction flow path formed to connect the through hole and a circumference of the sub-plate to each other and expanded and contracted by the pressure applied to the sub-plate. The expansion and contraction flow path includes a plurality of holes which are formed in a side surface thereof and through which the flow flows, and has a cross-sectional area changed by the pressure to control a flow rate.

Abstract: The invention relates to a release valve (100), installable on a container intended to contain a pressurized fluid and capable of maintaining a pressure difference between a first environment (9) and a second environment (90), comprising a housing (8), a first thrust means (3), a closure element (5), and a slider (2), wherein said housing (8) contains at least said slider (2) and said first thrust means (3), wherein said slider (2) comprises a first surface (25) facing the first environment (9), and a second surface (26), facing the second environment (90), and having an area greater than said first surface (25), wherein said closure element (5) is interposed between said second environment (90) and said slider (2), and wherein said first thrust means (3) is positioned between said slider (2) and said housing (8), so as to obtain at least one closed contact profile between said closure element (5) and said second surface (26), wherein said release valve (100) is characterized in that said fluid exerts on said

Abstract: The systems and methods of the present disclosure provides an independent passive variable resistor that can be interposed between a fluid reservoir at an inlet pressure and receptacle at an outlet pressure. The resistor can adjust resistance to the pressure difference from the input to the output so that the flow rate through it is a constant rate. The resistor can include a moveable element and a biasing mechanism located in a chamber to create a flow channel. Each side of the moveable element is exposed to the inlet and outlet pressures and moves within the flow channel to modify the resistance of the flow through the chamber in response to the pressures. The balance of these forces determines the position moveable element, which interacts with the fluid channel to determine the flow resistance through variable resistor. The biasing mechanism can provide the necessary pressure to establish equilibrium flow rate.

Abstract: A flow rate regulator s provided that decouples regions (7) of a regulating body (2) of a flow rate regulator (1) such that one of the decoupled regions (7) forms a low-pressure region (9) while another of the decoupled regions (7) defines a high-pressure region (8).

Abstract: Examples disclosed herein relate to a dispensing device including a syrup unit which transmits via one or more orifices one or more syrups and water to a dispensing block, a syrup source coupled to the syrup unit which provides the one or more syrups to the syrup unit, a water source which provides water to the syrup unit, and a cf valve coupled to a first orifice upstream of a solenoid valve where the cf valve provides a first range of pressures to the solenoid valve and where the first orifice is coupled to the dispensing block.

Abstract: An industrial truck having at least one hydraulic mast lift cylinder, which is connected to a hydraulic block via a hydraulic arrangement that limits a lowering speed of the mast lift cylinder. The hydraulic arrangement is formed to limit the lowering speed in a load-dependent manner to at least two maximum values. A first maximum value is given for the lowering speed at the nominal load while a second maximum value is given for the lowering speed with a load that is smaller than the nominal load, i.e., wherein the first maximum value is less than the second maximum value.

Abstract: A dialysis machine, in particular for hemodialysis and/or hemofiltration, having a dialyzate system and having a water inlet via which the dialyzate system can be connected to an external water supply. The dialysis machine includes a constant flow regulator that is arranged between the water connection and the dialyzate system.

Abstract: A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.

Abstract: A system and method to supply nitrogen gas is provided. Ambient air is compressed and stored in a storage receiver and then nitrogen is separated from the compressed air in a nitrogen membrane separation unit. The separated nitrogen is stored in a nitrogen storage tank under pressure and released through a pressure control valve. The system is confined to a small footprint and is useful as a nitrogen source where conventional compressed nitrogen tanks are a safety or space issue. Systems to prepare nitrogen infused beverages are also provided.

Abstract: An injection device comprises a housing comprising an inlet and an outlet and an outlet sleeve mounted within the housing and comprising at least one radial flow port therethrough for permitting fluid communication between the inlet and the outlet. A flow sleeve is mounted over the outlet sleeve and is arranged to move between a first position in which the at least one radial flow port is at least partially closed and a second position in which the at least one radial flow port is opened. The injection device also includes a flow sleeve actuator operable by a biasing arrangement and inlet pressure at the inlet of the housing to permit the flow sleeve to be selectively moved between its first and second positions to vary flow through the at least one radial flow port between the inlet and the outlet.

Abstract: A flow restrictor assembly includes a threaded element and a sleeve. The threaded element defines a plurality of threads that extend from a first threaded element end towards a second threaded element end. The sleeve has an inner sleeve surface that engages edges of a portion of the plurality of threads and extends between a first sleeve end and a second sleeve end. A lubrication flow path is defined by the portion of the plurality of threads and the inner sleeve surface and is arranged to create a pressure drop in a lubricant that flows through the lubrication flow path.

Abstract: A drip emitter has a hollow body provided with first and second pools and with an inlet recess between the first and second pools. The inlet recess has inlet hole(s). The emitter is provided with an elastic band surrounding at least one of the inlet holes. The elastic band, in its closed position, is in a tight contact with the inlet hole(s). In its open position, it is expanded to open the inlet hole(s).

Abstract: A two-way flow control valve includes a valve body, a control member, a cover mounted and a gasket. The valve body has a first water hole, a plurality of first ribs and a plurality of first flanges. The cover has a second water hole, a plurality of second ribs and a plurality of second flanges. The control member has a passage. The control member is provided with two V-shaped inclined planes which are clamped respectively by the first flanges of the valve body and the second flanges of the cover. When the water passing through the two-way flow control valve is large enough to reach a determined value, the control member is stretched and deformed to reduce the diameter of the passage, and to partially block the first water hole of the valve body or the second water hole of the cover.

Abstract: The invention relates to a droplet dispensing device (4) comprising a reservoir (9) for containing a liquid medium (10), an outlet (11) for dispensing droplets of said liquid medium (10) from said reservoir (9), an actuation means (12) for generating and transmitting a mechanical oscillation at an excitation frequency, and a resonant structure comprising a piston (15) coupled to said actuation means (12) for transmitting said mechanical oscillation to the liquid medium (10) contained in said reservoir (9) such that droplets are formed from said liquid medium (10), wherein a resonance frequency of said resonant structure is sufficiently close to said excitation frequency, such that resonance occurs. The invention further relates to a UV or X-ray light source, comprising a droplet dispensing device (4) according to the invention, and a method for providing a stream, in particular a monodisperse stream, of droplets by means of the droplet dispensing device (4).

Abstract: The present flow rate safety valve comprises a valve body, a valve seat, a valve core and a spring. The valve core is an open cylinder. A sealing washer is set up on the front end of the valve core. Part of the rim of the sealing washer contacts the inner wall of the valve body, forming a seal and guiding the valve core in the axial direction of the valve body. A projecting sealing part is arranged on the valve seat, and the inner wall at the rear end of the valve core is a conical surface which extends from the rear end face to the middle part of the valve core and forms a guide for the conical sealing part. Inside an outflow pipe of the valve body, a backflow preventer is arranged in order to prevent the medium backflow.

Abstract: A sanitary insert part includes an insert housing, which includes in a housing interior thereof a functional element that controls throughflow and that has at least one throughflow orifice. At least one throughflow opening is delimited by a peripheral wall, the shape of which can be changed against a restoring force as a result of the pressure of the inflowing water in such a manner that the at least one throughflow orifice has a variable orifice cross section which can be changed, in dependence on the pressure of the inflowing water, between an open position and a minimized position having a reduced orifice cross section by comparison.

Abstract: A solid particle distribution controller includes a plurality of division plates proximate a division between an upstream solid particle conveyance pipe and a plurality of downstream pipes. The solid particle distribution controller also includes a plurality of extension plates. Each of the extension plates is movably mounted proximate to a respective division plate for movement in an upstream and downstream direction with respect to the division plate. The plurality of extension plates are configured and adapted for motion in the upstream and downstream direction independent of one another to extend upstream of the division plates as needed to improve solid particle distribution among the downstream pipes.

Abstract: A water-saving flow regulator includes a housing; a flow regulating device within the housing and having a shaft hole that has a periphery including a plurality of through holes; a switching shaft movable between an initial position and a second position, sleeved with a sealing part, and inserted into the shaft hole; and a water diversion body disposed above the flow regulating device and having a bottom portion that forms a chamber. When the switching shaft is in the initial position, the sealing part closes a first flow passage so that water only flows out of a second flow passage. When the switching shaft is in the second position, the sealing part of the switching shaft moves away from the flow regulating device, the second flow passage is open and remains open due to water pressure so that water flows out of both passages.

Abstract: An adjustable passive flow regulator may be used in the field of drug delivery (liquid or gaseous, e.g. for pain management) or for draining cerebrospinal fluid (CSF) for hydrocephalus patient.

Abstract: In some aspects, a master cylinder assembly for vertical lift aircraft is configured to move pressurized fluid through a conduit in response to applied movement of an input lever. A low pressure relief valve can be connected to a first conduit to limit pressure to a low level. An isolation valve can be connected to the first conduit and configured to isolate the low pressure relief valve from the conduit when engaged. A high pressure relief valve can be connected to a second fluid conduit to limit pressure to a high level. In some aspects, a rotor brake actuator is fluidly connected to the first conduit and the second conduit and configured to engage a rotor brake in response to hydraulic fluid pressure.

Abstract: This invention discloses a valve including a body, an upper membrane, a lower membrane and a positioning block. The body has an upper channel, a lower channel, an accommodation space and a valve groove. The accommodation space defines an upper opening and a lower opening for respectively communicating with the upper channel and the lower channel. The valve groove is near the intersection of the lower channel and the accommodation space respectively communicating therewith. The upper and the lower membrane block the upper opening of the accommodation space and the lower opening. The positioning block is disposed between the upper membrane and the lower membrane and is able to push the lower membrane into the valve groove and abut against a sidewall of the valve groove. The valve is able to block the flow of water in the valve when the water flow is needed to be cut off.

Abstract: Method and apparatus for air flow limiting comprise a vertically oriented tube, a sail assembly positioned in the tube and moveable therewithin responsively to air flow through the tube to limit rate of air flow through the tube and halt air flow through the tube upon air flow rate through the tube exceeding a preselected value, and a moveable stop for adjustably changing the length of travel of the sail assembly thereby changing the maximum amount of air flow.

Abstract: A system and method for using exhaust gas to heat and/or charge a battery for a hybrid vehicle is provided. The system and method use an exhaust gas heat recovery (EGHR) device to heat a heat transfer fluid. The heat transfer fluid is thermally connected to a first heat exchanger to heat the battery and/or to a second heat exchanger to charge the battery if predetermined conditions are met.

Abstract: The regulating device (1) comprises a body (2) including a hub (3) which has a first end (3a) connected to a surrounding ring (4), such as to define therebetween at least one passage (6) for the fluid, between the upstream and downstream regions, and the other or second end (3b) of which protrudes with respect to the ring (4). The ring (4) has, on a surface thereof, an annular distribution of projections (7). On the second end (3b) of the hub (3) there is mounted a flexible, ring-shaped, regulating member (8) facing and spaced from the tops of said projections (7) and capable during use of resiliently flexing towards them as a result of and depending on the difference in pressure between the upstream and downstream regions. The ring (4) is further provided with a plurality of restricted holes (10) having a fluid flow parallel to the at least one passage (6).

Abstract: In one aspect, a fluid flow disruptor is provided. The fluid flow disruptor includes a base flange having an outer diameter and an inner diameter, the base flange configured to couple to a valve, and a cap extending from the base flange. The cap includes a proximal end coupled to the base flange about the inner diameter, a distal end, and a sidewall extending between the proximal end and the distal end. At least one aperture is formed in the sidewall, and the fluid flow disruptor is configured to direct a fluid flowing in an axial direction to flow around the cap distal end, through the at least one aperture, and through the base flange inner diameter into the valve, to thereby increase a turbulence of the fluid to decrease an axial momentum load of the fluid acting on the valve.

Abstract: The present application is directed to a gas-generating apparatus and various pressure regulators or pressure-regulating valves. Hydrogen is generated within the gas-generating apparatus and is transported to a fuel cell. The transportation of a first fuel component to a second fuel component to generate of hydrogen occurs automatically depending on the pressure of a reaction chamber within the gas-generating apparatus. The pressure regulators and flow orifices are provided to regulate the hydrogen pressure and to minimize the fluctuation in pressure of the hydrogen received by the fuel cell. Connecting valves to connect the gas-generating apparatus to the fuel cell are also provided.

Abstract: A bypass assembly for use in a downhole tool comprises a chamber, a first fluid port in fluid communication with the chamber, a second fluid port in fluid communication with the chamber, a flow restrictor disposed in a first flow path between the first fluid port and the second fluid port, a piston moveable in a first direction by the application of a first fluid pressure, a biasing member, and a restraining member disposed adjacent to the piston. The biasing member biases the piston to move in a second direction opposite the first direction, and the restraining member is actuated by movement of the piston in the first direction in response to a predetermined fluid pressure. Movement of the piston in the second direction to a predetermined position configures the bypass assembly to divert fluid flow around the flow restrictor along a second flow path.

Abstract: Embodiments of the present invention refer to a mixer group for bathroom or kitchen comprising a hollow cylinder, a tubular body that forms a seat for the sliding of the hollow cylinder and comprises an axial inlet and at least one radial outlet for the water, and an electric motor for actuating the hollow cylinder. The mixer group comprises a lid for the end opposite the inlet of the tubular body, defining an extension of the sliding seat, and an annular gasket between the tubular body and the lid, comprising an elastically deformable tab that projects into the extension of the seat, in open flow conditions, or is deformed against the hollow cylinder, to close the flow, when the hollow cylinder engages with the extension.

Abstract: The invention relates o a flow-volume regulator (1, 110) having a regulator housing (2) which (2) has at least one regulator ring channel (3) which (3) contains an annular flow restrictor (4) made of elastic material which (4) bounds, between itself and a channel wall that bearings a regulator profiling (5), a control gap (6) for which (6) it is possible to alter the passage cross section by means of the flow restrictor (4), which deforms under the pressure difference that forms during the flow, and also having at least one valve (7) which has a valve body (8) which (8) moves under the pressure of the flowing medium from an open position counter to a restoring force into a closed position, in which closed position the valve body (8) closes off at least one valve opening.

Abstract: The regulator comprises at least a cylinder (2) with a fluid inlet connector (1) for receiving fluid at an inlet pressure and a fluid outlet connector (4) for delivering fluid, at least one chamber (3), a rod (5) in said cylinder with one side submitted to the inlet pressure and the other side submitted to the outlet pressure generating a net force counter-balanced by at least one spring means (7) acting on one side of said rod (5) against said inlet pressure, wherein a fluidic pathway is formed between said rod (5) and said cylinder (2) as the major fluidic resistance of the device, wherein a change of the inlet pressure induces a move of the rod along the axis of the cylinder thereby modifying the fluidic resistance of said fluidic pathway, wherein the fluidic resistance of said pathway varies with the applied pressure at the inlet in a predefined range of pressure, inducing a regulated flow rate in the considered range of pressure.

Abstract: A flow control valve includes a housing that includes a fluid inlet and a fluid outlet; a valve body that together with the housing, forms a first chamber with a variable volume and a second chamber with a variable volume; a communication passage that connects the first chamber and the second chamber together; and an urging portion that urges the valve body in a direction in which the volume of the first chamber decreases. When the valve body moves in a direction to increase the volume of the first chamber against urging force of the urging portion, the valve body moves closer to the fluid outlet and reduces a degree to which the second chamber is communicated with the fluid outlet.

Abstract: A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.

Abstract: A water-saving device structure is provided. When the pressure of an entry water is high, a water-barrier sheet body is pressed to cause a downwardly-moved elastic stopping portion to block a water-inflow opening of a water-outflow seat body, so that the water flow is conducted to a water-outflow opening through a water-conducting opening of the water-barrier sheet body. When the pressure of the entry water is low, the entry water is conducted to the water-outflow opening via one path traveling from the water-conducting opening of the water-bather sheet body to the water-outflow opening of the water-outflow seat body and the other path traveling along the clearances of stopping wall portions of the water-outflow seat body, a water-storage circular slot portion, the water-inflow openings of the water-outflow seat body and the water-outflow opening of the water-outflow seat body. Therefore, the outflow water with steady flow rate can be obtained.

Abstract: A volume accumulator (15), including a guide housing (33) and a separating element (34), wherein the separating element (34) is slidably mounted on an inner lateral face of the guide housing (33). At least one indentation (41) is located on the guide housing (33), with the indentation protruding into the guide housing (33), wherein in the direction of the separating element (34) the indentation (41) has an open end that serves as a stop for the separating element (34).

Abstract: Disclosed herein is a flow-actuated actuator. The actuator includes, a tubular with a flow passageway having a first flow area, and at least one movable member in operable communication with the tubular. The at least one movable member is movable relative to the tubular between at least a first position and a second position, the at least one movable member configured to form a second flow area that is smaller than the first flow area when in the second position, the flow-actuated actuator is configured to move a separate member in response to fluid flow therethrough.

Abstract: A bypass valve which may direct excess oil back into the cam chest where the return side of the oil pump may send the oil back into the oil tank. The bypass valve may fit within the bypass port of the cam plate and connect with a high pressure feed. The bypass valve may include a sleeve with a front opening and a needle valve within the bypass valve. The needle valve may be biased in a closed position, sealing off the front opening. When the high pressure feed exceeds a certain oil pressure, the needle valve may unblock the front opening.

Abstract: A throughflow rate limiting device with a spring-loaded valve body which is disposed upstream of a cross-sectional constriction in a flow duct so as to be axially slideable between a first and a second position. The valve body is loaded by a spring in the direction of the first position, and for a given pressure gradient throughflow in the first position is greater than in the second position. The cross-sectional constriction may be bypassed by at least one bypass line which branches off from the flow duct upstream of the cross-sectional constriction and rejoins the flow duct downstream of the cross-sectional constriction. In order to achieve small flow resistance in the open state and abrupt switching, the valve body has the shape of a double cone.

Abstract: The present invention provides, in part, a valve assembly and method that maintains balance of flow to pressure. In one embodiment, the present invention includes a main body component, a chamber body component, a fluid control plate and seal, and a chamber cap. The chamber body component is adapted to slidingly engage the main body member. A spring assists in biasing the chamber body component in position within the main body component. The chamber cap with a sealing ring assists in preventing backflow of fluid into an outer body or tube member while also providing an opposing force to movement of the chamber body member within the main body member. A sealing ring is also provided around the head portion of the chamber body member. An additional sealing ring can be provided in a cavity on the outside of the main body member.

Abstract: Improvements in an Overflow Shutoff Valve (OSV) that is designed to automatically shutoff water flow when water flows above a rated amount. It is a self-cleaning design with automatic resetting function. The valve consists of an outer body with an inlet and outlet port with an internally installed rubber Venturi tube assembly, fixed flange, moving flange, coil spring and surge flow suppressing orifice. The lower pressure causes the rubber tube to be squeezed by the water pressure, and then automatically shuts off the valve. When the supply water pressure drops below 5 psi the Overflow Shutoff Valve automatically resets and opens to normal position. A flow suppressor orifice prevents any surge flow or start up flow which could cause premature shutoff of the valve. The Overflow shutoff valve can be installed in-line or in a Y body shutoff valve for easy service.

Abstract: A flow control device is comprised of a body/connector, a simplified sliding cord, a sealing device, and a stopper. The body/connector connects an overhead sprinkler to a supply line by means of male threaded ends. The body/connector is comprised of a wrench connector, which is located between the two male threaded ends, a guiding tube that sits on the top side of the body/connector with the assistance of the supporting ribs. The guiding tube guides the sliding cord up and down inside the flow control device and sprinkler. The sliding cord is made from a material that is flexible enough to bend inside the supply line and strong enough to return to its original straight shape. The stopper and the sealing device are connected to each other with the sliding cord. The sealing device sits against the sealing surface of the body/connector if the sprinkler head is missing. The stopper prevents the sealing device from making contact with the body/connector during normal operational conditions.

Abstract: A fluid flow regulator includes a regulating profile which is either centrally or peripherally disposed within the flow rate regulator, and an annular restrictor which is made of an elastic material. In a functional position of the flow rate regulator, the restrictor delimits a control gap between itself and the regulating profile. In a starting position of the flow rate regulator, the flow rate regulator has an unrestricted flow cross section that is larger than the control gap. The unrestricted flow cross section of the flow rate regulator is variable by a deformation of the restrictor in response to a pressure differential that is generated when a fluid flows through the flow rate regulator. The relative position of the restrictor and the regulatory profile is variable, and moveable against a reset force, into the functional position from the starting position, in response to a flow of fluid within the flow rate regulator. The reset force may be provided in the form of a spring.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: A constant-flow valve assembly having a first passageway carrying fluid at a first pressure, a piston chamber, and a second passageway connected to the chamber and carrying fluid at the second pressure. A third passageway carries fluid at a third pressure. An adjustable valve is between the chamber and the third passageway, and an adjustable restrictor is positioned between the first and second passageways. An inlet portion of the restrictor assembly receives fluid at the first pressure and directs the fluid to a restrictor, and outlet portion directs the fluid to the second passageway at the second pressure. The restrictor is movable to adjust the position of entry and exit portions relative to the inlet and outlet portions to adjust a fluid flow rate to the second passageway to adjust the flow rate through the valve assembly.

Abstract: An air control regulator regulates the amount of air flowing into the inlet of a combustion chamber by causing flowing air to support a disc located in the air passage against the force of gravity. Air passes around the edges of the disc and is channeled into a plurality of airflows by ovoid depressions in the inner surfaces of the regulator forming a venturi chamber. By regulating the airflow into the combustion chamber, combustion efficiency is improved.

Abstract: A flow control valve (11) for a hydraulic line, having an outlet opening (18a) for hydraulic fluid, an inlet opening (18) for hydraulic fluid and a differential pressure regulator (17) for the pressure independent provision of a constant volumetric flow of the hydraulic fluid, and having a setting part (15a) for setting the control behavior of the differential pressure regulator (17), the setting part (15a) having an operating section (27) which is provided so as to be accessible outside the hydraulic line for setting the setting part (15a).

Abstract: A valve includes a valve body, a diaphragm dividing the inside of the valve body into first and second valve chambers and being displaced under a pressure of fluid, first and second openings in communication with the first valve chamber, and a third opening in communication with the second valve chamber. When a pump is not driven, the force applied to a side of the diaphragm facing the second valve chamber is greater than the force applied to a side of the diaphragm facing the first valve chamber, and the second opening is sealed by the diaphragm. When the pump is driven and the force applied to the side of the diaphragm facing the first valve chamber becomes greater than the force applied to the side of the diaphragm facing the second valve chamber, the diaphragm allows the first and second openings and to communicate with each other.

Abstract: A self-compensated, adjustable fluid emitter includes a casing externally delimiting a volume, which is divided into a first chamber and into a second chamber by a fixed membrane that can be elastically deformed. An inlet communicates with the first chamber and an outlet communicating with the second chamber, causing the first and the second chambers to be in communication one with the other through a communicating duct. In operation, the membrane becomes deformed such that at least a portion thereof changes its position with respect to the outlet, modifying the flow rate of the fluid through the outlet depending on the pressure difference. Therefore, the flow rate of the fluid through the outlet is controlled and kept constant by the membrane in spite of changes in fluid pressure at least at the inlet or the outlet.

Abstract: A system for and method of supplying an injection fluid to a well assembly so that the injection fluid flows at a substantially constant flow rate. The fluid can be injected at a single site in the well assembly or multiple sites. A flow control regulator is included that attaches to the well assembly and provides a self adjusting flow control for the fluid being injected. The regulator includes a slidable floating sleeve having an orifice through which the fluid flows. The sleeve includes an inlet port that can register with a fluid supply port to allow the injection fluid to make its way into the sleeve. The fluid exits the sleeve through the orifice to generate a pressure differential across the orifice that in turn exerts a sliding force onto the sleeve. Moving the sleeve misaligns the inlet port and fluid supply port thereby throttling flow through the regulator to a predetermined flow rate.