Abstract: A safety system for a fluid conduit includes an elongated flexible conduit having a first end and a second end and a central opening running therethrough and capable of transporting a first fluid under pressure. A first valve is located near the first end of the conduit and a second valve is located near the second end of the conduit. Each of the valves is moveable between a closed position and an open position so as to control the flow of the first fluid through the conduit. The central opening of the conduit is surrounded by a conduit wall which extends substantially the entire length of the conduit. A plurality of enclosed channels are located within the conduit wall and extend at least a substantial length of the conduit. A second fluid under pressure is contained in the channels and a sensor is provided for monitoring the pressure of the second fluid within the channels.

Abstract: In some embodiments, a vented valve assembly for attachment to a rigid container may include one or more of the following features: (a) a unitary tubular valve body of a generally cylindrical hollow form and having a liquid inlet end, and (b) a second end and a liquid outlet port, said liquid inlet end adapted for connection to a male spout on a wall of the rigid container, said liquid outlet port being exterior to the wall of the rigid container when the liquid inlet end is affixed to the spout, the valve body further including an air vent opening formed through a wall of the tubular valve body leading to a channel affixed to an inner wall of the tubular valve body, the channel having one open end.

Abstract: Disclosed herein is a water level controlling device for intercepting the supply of water to the water reservoir of a water purification system. The water level controlling device includes a water reservoir having a plurality of diaphragms which are provided on the lower surface of the water reservoir in such a way as to move up and down. A flow body is mounted to the lower surface of the water reservoir and defines a water circulation path, with a plurality of control parts provided in the circulation path to block the flow of water by the corresponding diaphragms. A plurality of floaters moves up and down in the water reservoir according to the water level. An actuator moves each of the diaphragms to the corresponding control part as each of the floaters rises, thus intercepting the flow of water passing through the control part.

Abstract: Plural door portions are formed by sectioning the gas blowing section of the gas generator with slits. In a state in which gas has been generated by the gas generator, the plural door portions part at the slits and open towards the outside of the casing body. A gas flow path section is connected to a peripheral wall section configuring an deployment space permitting opening of the door portions. The gas flow path section is provided with an upstream portion which is in communication with the deployment space and formed along a direction orthogonal to the direction of gas blowing from the gas blowing section, and an opening portion provided at the gas inflow side, which is set so as to communicate with a space which is between adjacent door portions when the door portions 56 are in a opened state.

Abstract: The invention relates to an integrated gas regulating and safety valve for burners of a modulatable gas heating device. According to the invention, the gas regulating and safety valve comprises a housing (1) with two controllable closing elements, the axes of which are spaced apart from each other and extend one behind the other in series in the direction of gas flow between an inlet channel (2) and an outlet channel (4) of the housing. In the de-energized state, the two closing elements abruptly close the gas regulating and safety valve independently of each other, in each case by means of an associated spring element (7, 12). The first closing element, additionally serving for the modulation of the gas stream, has a drive spindle (15.1), which is formed as a spindle of a stepping motor (15), is surrounded by an excitation winding (16) and has placed on its end a restrictor component (8) and, at a distance from that, the first spring element (7).

Abstract: A shut-off valve or connecting valve capable of connecting a fuel supply to a fuel cell is disclosed. The valve comprises a first valve component and a second valve component. Each valve component has an outer housing and a biased slidable member disposed inside the housing forming an internal seal. During the connection process, the two valve components establish an inter-component seal. Afterward, in one suitable embodiment the slidable member moves inward and opens the internal seal in the valve component to establish a flow path. In another embodiment, the slidable member moves inward and exposes a first filler and the first filler abuts a second filler in the other valve component to establish a flow path. In other embodiments, at least one valve component is sized and dimensioned to limit access to the internal seal.

Abstract: A filler coupling comprising an isolation valve that can move relative to a seat between an upstream closing position and a downstream opening position, said isolation valve being moved to its upstream position by a return member, the coupling also comprising a dust-prevention valve placed upstream of the isolation valve, said dust-prevention valve comprising a downstream end and being able to move relative to the body between an upstream closing position and a downstream opening position, said dust-prevention valve being moved to its upstream position by a return member, characterized in that the dust-prevention valve can be moved selectively downstream either: in a first determined downstream position opening the upstream end in which the downstream end of the dust-prevention valve does not push the upstream end of the isolation valve, or in a second determined downstream position opening the upstream end, in which the downstream end of the dust-prevention valve pushes an upstream end of the movable isolati

Abstract: A two-stage regulator having a piston situated in a first stage for substantially reducing high pressures introduced into the regulator. The reduced pressure is exerted against the second stage that includes a plunger-actuated diaphragm that urges an actuator to open a ball valve at a selected pressure to allow fluid to flow out of the regulator at a desired reduced pressure.

Abstract: A flush valve according to the present disclosure includes a pressure compensating device for toilet and urinals to ensure consistent flush and bowl refill volumes. Certain flush volume limits may required for compliance with federal, state and local regulations regarding water usage. The flush valve can adjust water flow rates within the prescribed water usage limits and does not sacrifice the toilet's bowl washing and waste removal capabilities.

Abstract: An example method of accessing a valve assembly of a turbomachine includes accessing a check valve of the valve assembly from a first position that is radially outside a flow path through the turbomachine. The method accessing a shut off valve of the valve assembly from a second position that is radially outside the flow path. The check valve and the shut off valve are configured to influence communication of lubricant along a lubricant communication path that extends between a location radially outboard the flow path and a location radially inboard the flow path. The first position is the same as the second position in some examples.

Abstract: An electronic faucet includes a spout assembly having a sensor configured to control the flow of water therethrough in response to the position of a spray head.

Abstract: A vacuum relief unit and method for venting air into a pool pumping system when a pressure level within the system drops below a first pressure level limit. The unit includes a closed air chamber, a device for venting chamber air from the air chamber into the pool pumping system when the pressure level in the pool pumping system drops below the first pressure level limit, a device for venting atmospheric air into the air chamber when the pressure level within the air chamber drops below a second pressure level limit that is lower than the first pressure level limit, and a device for delaying operation of the atmospheric air venting device when the pressure within the air chamber is no longer below the second pressure level limit.

Abstract: The invention relates to an arrangement of pulse-modulated quick-acting valves on a fluid storage device, wherein the valves have different nominal widths for operation thereof in different pressure ranges with otherwise identical structure. The number of the valves and the respective nominal widths thereof is selected and matched to a fluctuation range of the pressure in the storage device such that over this fluctuation range of the storage device pressure, by complete opening, complete closing and/or switching individual valves or valve combinations, a total dispensed mass flow of the fluid from the storage device in a fluctuation range of varying mass flows of constant pressure as required can be produced.

Abstract: A steam valve assembly has a main-steam stop valve, and a steam control valve connected downstream to the main-steam stop valve via an intermediate flow path. The two valves each has a casing having an inlet port directing horizontally, and an outlet port directing vertically. The valve bodies and the valve stems move up and down in the casings to open and close the flow paths in the valves. The intermediate flow path is configured to guide main steam from the outlet port of the main-steam stop valve in vertically downward direction to the inlet port of the steam control valve in horizontal direction.

Abstract: A load sense connection is provided between the implement rockshaft cylinders and the load-sensed power source. However, to avoid tractor starting difficulty, a valve structure is provided in the power beyond fluid line to keep the fluid line closed when starting the tractor. This valve structure provides a hydraulic latching function that allows the load-sensed power source to be activated and deactivated depending on the SCV function. The load-sensed power source is activated when the rockshaft cylinder(s) is fully extended and remains activated or latched when the SCV is returned to neutral. The load-sensed power source is deactivated or unlatched when the rockshaft cylinder is retracted.

Abstract: A first check valve has a narrow flow path portion (68) formed between an arcuate portion (46) of the outer periphery (45) of a support member and a second enlarged-diameter portion (11) of a casing. The narrow flow path portion (first portion of an intermediate flow path) is in fluidic communication with a back-pressure chamber (50) defined in the support member at the rear of the top of a valving element through a communicating passage (67) including a gap (66) between the outer periphery of the valving element and the inner periphery of a large-diameter portion (38) and grooves (27) on the rear surface of the top of the valving element. Thus, a low static pressure of fluid flowing through the narrow flow path portion is introduced into the back-pressure chamber to move the valving element by a large differential pressure during the supply of fluid, thereby allowing the valve opening to become larger than in the conventional apparatus and enabling a reduction of pressure losses.

Abstract: Fluid valves having an integral safety shut-off are described. An example control valve having opposing seating surfaces includes a first bonnet removably coupled to the control valve. The first bonnet has a first bore receiving a portion of a first valve trim. The first valve trim comprises a first valve stem operatively coupled to a first valve plug or closure member to engage one of the seating surfaces to provide a fluid seal between the first bore and the portion of the first valve trim. Additionally, the control valve includes a second bonnet removably coupled to the control valve. The second bonnet has a second bore receiving a portion of a second valve trim. The second valve trim comprises a second valve stem operatively coupled to a second valve plug or closure member to engage the other one of the seating surfaces to provide a fluid seal between the second bore and the portion of the second valve trim.

Abstract: A valve arrangement for a pipeline protection system comprises a plurality of barrier valves in series with each other for coupling in a pipeline, wherein the valves are received in a metallic block.

Abstract: An improved sandwich-type valve made according to this invention has two seals that move and seal independent of one another. The first seal is located on the upper surface of the valve member or disc and moves with the valve disc toward and away from the upper plate in response to fluid pressure. The second seal is a floating seal that is received by a seat of the lower plate portion of the valve body. The second seal moves toward and away from the lower plate in response to fluid pressure. A bleed port may be provided in the spacer flange between the first and second seal.

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 steam valve 1 includes: a valve seat 9 being accommodated in a steam flow path of a casing 2 provided with a steam inlet pipe 14 and a steam outlet pipe 15; and a valve body 22, 27 capable of contacting the valve seat 9, the valve body 22, 27 being accommodated in the steam flow path of the casing 2. An expansion part 10 that smoothly projects toward an inside of the steam outlet pipe 15 is disposed at a downstream side on a contact surface of the valve seat 9.

Abstract: A leak detection system for detecting a leak within a duplex valve assembly is disclosed. The duplex valve assembly includes a first valve, a second valve and an intermediate fluid flow passageway fluidly interconnecting the first valve to the second valve. The leak detection system includes a means for indicating whether the first valve is maintained in a closed position or an open position, a means for indicating whether the second valve is maintained in a closed position or an open position, and a pressure change detector within the intermediate fluid flow passageway. The pressure change sensing means is at least partially positioned within the intermediate fluid flow passageway for detecting a pressure change within the intermediate fluid flow passageway.

Abstract: A plurality of solenoid valves are installed on a valve mount surface of a manifold base to receive a pressure fluid supplied from a supply passage of the manifold base via a supply communication hole. A stop valve base connected to a side surface of the manifold base has a stop valve mount surface formed on the upper surface to the side of the valve mount surface. The stop valve is attached to the stop valve mount surface to open and close the supply communication hole by pushing and pulling the stop valve from a side with the solenoid valve.

Abstract: An electronic faucet includes a spout assembly having a sensor configured to control the flow of water therethrough in response to the position of a spray head. Methods and apparatus for providing strain relief for electrical cables used in systems configured to provide fluid and, in particular, to methods and apparatus used to provide strain relief for electrical cables in electronic faucets.

Abstract: The present invention discloses multiple loop reactor wherein one of the settling legs transferring polymer product from one loop to a further loop can be taken out of service or re-opened without interfering with the operation of said multiple loop reactor.

Abstract: A system to reduce standby losses in a hot water heater is presented. The system utilizes a dual safety relay valve between the combination gas controller and the burner. The dual safety relay valve bypasses gas to a rotary damper actuator valve to position a damper flapper valve located over/inside the flue pipe. Once the flapper valve has opened to ensure combustion, the gas is allowed to flow back to the dual safety relay valve. Some of the bypass gas may be diverted to boost the pilot or to supply a booster. The dual safety relay valve is then opened to allow the gas supply to the burner. Once the burner is turned off, bypass gas bleeds out of the rotary damper actuator valve to close the damper flapper valve to reduce standby losses through the flue pipe, and to allow the dual safety relay valve to close tightly.

Abstract: Methods and devices are provided for transfer of particulate material, such as biomass feedstocks, into and out of pressurized reactors. Improved sluice devices have an L-shaped sluice chamber having an upper, vertical component in communication with a horizontal loading chamber and a lower component in communication with a vertical reactor inlet or outlet. Piston valves seal the sluice inlet and outlet by axial displacement across the vertical component of the sluice chamber and across the vertical reactor inlet or outlet. Relative to other methods for reactor unloading, these devices consume less steam and significantly reduce furfural content of unloaded, pretreated biomass. An optional hybrid plug/sluice method of biomass feeding using the devices permits biomass loading at sluice pressures intermediate between atmospheric and reactor pressure, thereby reducing “pump cycle” time and increasing biomass throughput capacity.

Abstract: A rotary union includes a non-rotating machine component having a receiving counterbore, a media channel opening, and a control channel. A housing is positioned within the receiving counterbore and has a bore and a control chamber in fluid communication with the control channel. A non-rotating seal member is slidably and sealingly disposed within the bore in the housing and has a media channel in fluid communication with the media channel opening and the receiving counterbore. The non-rotating seal member can be selectively extended or retracted within the bore of the housing, such that selective engagement of a face seal is accomplished under different operating conditions of the rotary union.

Abstract: The present invention relates to microfluidic systems, including valves and pumps for microfluidic systems. The valves of the invention include check valves such as diaphragm valves and flap valves. Other valves of the invention include one-use valves. The pumps of the present invention include a reservoir and at least two check valves. The reservoir may be of variable volume. The present invention also relates to a flexible microfluidic system. The present invention additionally relates to a method of making microfluidic systems including those of the present invention. The method includes forming a microfluidic system on a master, connecting a support to the microfluidic system and removing the microfluidic system from the master. The support may remain connected to the microfluidic system or the microfluidic system may be transferred to another substrate. The present invention further relates to a method of manipulating a flow of a fluid in a microfluidic system.

Abstract: A drain system and method for draining a first liquid, including a collection vessel having a first chamber arranged to receive the first liquid, a second chamber, and higher and lower valves positioned between the first and second chambers. When the valves are open, liquids can pass between the chambers. When the pressure in the second chamber exceeds that in the first chamber by more than a first predetermined amount, the valves are closed. A first outlet to the second chamber allows liquids to flow from the second chamber. In a first mode, the first inlet supplies a second liquid at a pressure higher than that of the first liquid in the first chamber such that the valves are closed. In a second mode, the first inlet stops supplying the second liquid such that the pressure in the second chamber reduces relative to the first chamber allowing the valves open.

Abstract: A centralized automatic fluid or gas spill prevention and shut-off valve system that prevents line ruptures comprising means to reduce fluid pressures, such as gas, to appropriate levels, a continuous monitoring of downstream conditions, an immediate stop system of major spillage caused by excessive flow wherein said immediate stop system automatically shuts off the flow of fluids, means for timed shut off of minor fluid flows that exceed a predetermined amount of time and a restarting system that restarts when overflow conditions are corrected, wherein said restarting system works automatically or manually.

Abstract: A tubular actuator includes, a tubular, a support member disposed at the tubular, and a restrictor configured to pass a runnable member when unsupported by the support member and to prevent passage of the runnable member when supported by the support member. The restrictor is movable relative to the support member from an unsupported position to a supported position in response to pressure applied against the runnable member engaged with the restrictor according to a pressure versus time profile.

Abstract: A tubular actuator includes, a restrictor disposed at a tubular that is engageably receptive to a runnable member run thereagainst as long as pressure remains above a latch pressure, the restrictor configured to allow passage of the runnable member after a delay at pressure equal to or below the latch pressure.

Abstract: A cryogenic liquid cylinder pressure control manifold is disclosed. The manifold includes, in a unitary arrangement, a pressure build regulator, a pressure build inlet fitting, a pressure build regulator, NPT adapter fitting, a check valve, and a cylinder pressure gauge. The disclosed manifold eliminates various threaded connections associated with prior devices, thus providing a more reliable device having less likelihood to leak in service. The disclosed manifold also reduces labor costs associated with assembling prior systems which are composed of a plurality of different individual components. In one embodiment, the disclosed manifold is employed as a cryogenic CO2 manifold for use in the beverage industry.

Abstract: A valve control unit including three valve units for two brake channels of an electropneumatic brake system is provided. Each valve unit is embodied as a valve modulator device for a braking pressure control circuit including an air inlet valve with a primary solenoid and a bleed valve with a secondary solenoid. Each modulator device armature includes a common solenoid guide arrangement controlled by the magnetic flux of a common magnetic coil. Independent operation of the armatures is achieved whereby flux through the secondary solenoid is weakened by a shunt in the flux circuit which causes a switching delay for the secondary solenoid relative to the primary solenoid. The magnetic resistance of a non-magnetic disc effects switch-off acceleration in the flux circuit with energized secondary solenoid, weakens the field and causes the secondary solenoid to revert to a spring-loaded base state at a higher flux than the primary solenoid.

Abstract: The invention relates to a re-configured valve design to accommodate a high volume of product in the delivery system and the dispensation of product upon the application of a predetermined vacuum condition on the downstream side of the valve.

Abstract: A fluid receiving chamber including a fluid inlet hole through which a fluid flows from outside, an inner space which contains the fluid, a fluid supply hole through which the fluid flows from the fluid inlet hole to the inner space, and a fluid outlet hole through which the fluid contained in the inner space is discharged to the outside, where the fluid supply hole is disposed above the fluid outlet hole, and the fluid is supplied to the inner space through the fluid supply hole by gravity.

Abstract: A regulator device includes a first valve member and a second valve member disposed within a housing of the device. The first valve member regulates the pressure of fluid exiting the device, and the second valve member is biased to a closed position and is opened by manipulation of an actuator. A sealing element is connected at the housing outlet and has a transverse cross-sectional dimension that decreases from an inlet of the sealing element to an outlet of the sealing element. In addition, a guard is provided that extends around a periphery of the actuator and includes a cut-out section to permit easy access to the actuator during use of the device.

Abstract: A digital flow control assembly for controlling the volumetric flow rate of fluids includes a fluid flow conduit, a plurality of serially-arranged flow nodes positioned along a length of the fluid flow conduit, and a device for generating a signal. The device for generating a signal is used to adjust one or more of the plurality of serially-arranged flow nodes to maintain a desired volumetric flow rate of fluid in the fluid flow conduit. A method for controlling the volumetric flow rate of fluids includes providing a fluid flow conduit, providing a plurality of serially-arranged flow nodes positioned along a length of the fluid flow conduit, and providing a feedback signal to adjust one or more of the plurality of serially-arranged flow nodes to maintain a desired volumetric flow rate of fluid in the fluid flow conduit.

Abstract: A valve system includes a load holding valve, a feed balancing valve, and a fast feed differential valve. The load holding valve may be in fluid communication with the load holding valve. The fast feed differential valve is configured to move between an engaged state and a disengaged state. In the engaged state the fast feed differential valve fluidly couples a ring side of a feed cylinder, the load holding valve, and a piston side of the feed cylinder to allow fluid to flow from the ring side to the piston side.

Abstract: A pressure control valve device with at least one inlet area and first and second outlet areas which can be connected by two poppet valves. A flow guide device (21), with inflow and outflow areas (22, 23) for guiding the fluid flowing from the inlet area in a defined manner in the direction of the second poppet valve, is located upstream of the second poppet valve, between the first and second outlet areas. The fluid in the flow guide device (21) passes in the area between the inflow and outflow areas (22, 23) through a plurality of channel areas distributed around the periphery of the flow guide device (21) and separated from one another, which are shaped at least approximately helically and impart an at least approximately vortex-like flow pattern to the fluid flowing in the direction of the second poppet valve downstream of the outflow area (23).

Abstract: The present invention relates to easy to use, cost-effective, resealable components and systems. A disposable device is provided that includes at least one valve that flows in at least one direction, an intermediate structure, and at least one reflux valve.

Abstract: A fuel distributor valve (19) of a type suitable for use in the fuel supply system of a gas turbine engine is disclosed. The valve comprises: a valve body (22) through which a bore (24) extends between a fuel inlet (22) and a fuel outlet (23); a first valve seat (28) and associated valve member (30) provided across the bore (24), the first valve seat (28) defining at least one fuel-flow-port (26) and the valve member (30) being moveable between a closed position in which it substantially seals against the first valve seat (28) to close the or each fuel-flow-port (26) and an open position in which it is spaced from the first valve seat (28) to permit the flow of fuel through the or each fuel-flow-port (26) in a direction flowing from the fuel inlet (22) towards the fuel outlet (23).

Abstract: The invention relates to a device for the supply of special gas, that can be mounted on a gas cylinder and comprises: a multi-function unit housing a fluid circuit comprising a single high-pressure regulator; a purge system consisting of three low-pressure valves; a means for fluidic connection towards the inner space of a cylinder; and an outlet enabling equipment to be supplied with gas. The invention is characterised in that the high-pressure regulator is arranged upstream of the purge system.

Abstract: Some embodiments disclosed herein relate to a medical connector having a backflow resistance module configured to prevent fluid from being drawn into the connector when a backflow inducing event occurs. In some embodiments, the backflow resistance module can include a variable-volume chamber configured to change in volume in response to a backflow-inducing event and a check valve configured to resist backflow. In some embodiments, the medical connector can include a fluid diverter configured to direct fluid flowing through the medical connector into the variable volume chamber to prevent fluid stagnation therein. In some embodiments, the medical connector includes a body member, a base member, a seal member, a support member, and a valve member.

Abstract: A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position.

Abstract: A one-piece gas pressure regulator, comprising a main body having a first threaded port at the bottom thereof for a threaded connection with a high-pressure gas bottle. An admission passage is formed above the first threaded port and extended to a hollow pressure chamber within the main body. The hollow pressure chamber has an escape channel for ejecting the gas via an output control element, wherein the main body includes a second threaded port having a greater diameter and is positioned above the hollow pressure chamber. The second threaded port is adapted to receive a cylindrical body. The inside of the cylindrical body is divided by a partition into an upper and a lower chamber. The partition has a through hole in the middle thereof. The upper chamber is adapted to receive a pressure detector while the lower chamber is used to receive a pressure-adjusting element. The through hole is formed in such a way that a connecting head of a pressure detector is extended into the through hole.

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: A system to secure a storage unit on a supply vessel surface including a first frame module having a first attachment mechanism configured to releasably engage with a second attachment mechanism of a second frame module, and a first valve disposed on the first frame module, wherein the first valve is in fluid communication with a second valve disposed on the second frame module through a central flow pipe. The system further including a locking mechanism configured to releasably secure the storage unit to at least the first frame module, and at least one flow conduit configured to provide fluid communication between the first valve and the storage unit.

Abstract: A pressure regulator assembly includes an integrated body. The integrated body has an inlet for connecting to a gas cylinder, a bore extending from the inlet to a pressure regulator, a passage extending from the pressure regulator to an outlet, and a fill port in communication with the bore. The pressure regulator assembly includes the pressure regulator operable to reduce pressure of a fluid flowing therethrough between the bore and the passage to a sub-atmospheric pressure; and an isolation valve operable between an open position and a closed position. The isolation valve is operable to seal the passage from the outlet in the closed position and to provide fluid communication between the outlet and the passage in the open position.