Abstract: A power steering fluid pump valve may include a body and a metering plunger. The body may have an inlet, an outlet, and a passage extending between the inlet and the outlet for power steering fluid-flow therethrough. The metering plunger may be partly or more located in the passage. In use, the metering plunger may be adjusted to different positions in the passage to change the volumetric flow rate of power steering fluid-flow through the body's outlet.

Abstract: An aspect of the present disclosure relates to a steering system having first and second steering circuits in fluid communication with a fluid actuator wherein the steering circuits are disposed in parallel to each other. The second steering circuit includes a proportional valve having a load-sense feature in selective fluid communication with a load-sense connection and the first steering circuit. The load-sense feature is open to the first steering circuit when the proportional valve is in a neutral position and closed to the first steering circuit when the proportional valve is moved to a first or second steering position. When the proportional valve is actuated from the neutral position to the first or second steering position the movement of the proportional valve closes the load sense feature from the first steering circuit and operates to deactivate the first steering circuit.

Abstract: A reductant delivery and supply system including a storage tank, a pump, a dosing module, and a mis-fill prevention system. The storage tank stores a fluid. The pump is coupled to the storage tank by a delivery line. The dosing module is coupled to the pump by a supply line. The mis-fill prevention system includes an expandable plug. The expandable plug is configured in contact with the fluid. Moreover, the expandable plug is configured to expand on contact with a hydrocarbon.

Abstract: An apparatus, system, and process of converting a standard, high performance liquid chromatography (HPLC) flow path to a flow path suitable for supercritical fluid chromatography (SFC) are described. This reversible technique is applied to a variety of flow configurations including binary, high pressure solvent mixing systems and quaternary, low pressure solvent mixing systems than can be conventionally operated or automated. The technique is generally applied to the fields of supercritical fluid chromatography and high pressure liquid chromatography, but users skilled in the art will find utility for any flow system where pressurization components must be periodically applied to and removed from both ends of a flow stream in an automated manner.

Abstract: An excess flow valve including: (a) a housing including: an inlet portion; and ii) an outlet portion coupled to the inlet portion to define an interior having a passageway between an inlet and an outlet, wherein at least one of the inlet and outlet portion defines a valve seat and an annular channel; and (b) a unitary plunger including: a valve portion defining an aperture; a rim surrounding the valve portion; and an expandable portion extending between the valve portion and the rim, wherein the rim seats within the annular channel to fix the plunger such that the valve portion is set apart from the valve seat for allowing the passageway to be normally open, and as a flow through the fluid passageway exceeds a predetermined level, the expandable portion extends so that the valve portion couples to the valve seat to at least partially close the passageway.

Abstract: A control and supply unit for an actuating device of a choke, a valve, a blow-out preventer or some other device applied in the field of oil and natural gas production. The control and supply unit includes a vibration detection means to detect vibrations caused by a conveyed flow. The conveyed flow can be controlled by the actuating device.

Abstract: Provided is a shut-off valve fault diagnosis device that performs fault diagnosis of a first shut-off valve that is disposed immediately after a gaseous fuel tank and a second shut-off valve that is disposed immediately before a regulator in a gaseous fuel supply system. The shut-off valve fault diagnosis device includes a diagnosis processing unit that performs a valve-shutting control of the first shut-off valve, performs a valve-shutting control of the second shut-off valve after a predetermined time has passed since the valve-shutting control of the first shut-off valve, and performs fault diagnosis of the first shut-off valve and the second shut-off valve based on a variation tendency in a fuel pressure between the first shut-off valve and the second shut-off valve after performing the valve-shutting control of the second shut-off valve.

Abstract: Systems and methods for controlling fluid delivery via a manually administrable medication container to a patient through a fluid delivery pathway are provided. The systems and methods described herein incorporate rules-based clinical decision support logic to drive a flow control valve within a flow pathway to determine whether the IV fluid connected to the input port is consistent with medical orders, accepted delivery protocols, and/or specific patient and patient histories. Related apparatus, systems, methods and articles are also described.

Abstract: A flow rate measuring device includes a fluid resistance member through which measurement target fluid flows; an upstream side pressure sensor configured to measure pressure on an upstream side of the fluid resistance member from a change of electrical resistance of a resistive element attached to a pressure sensitive surface onto which the target fluid is introduced, and also to measure a temperature of the pressure sensitive surface from a temperature-dependent change of the electrical resistance of the resistive element; a temperature sensor to measure a temperature of the target fluid flowing through the fluid resistance member; and a flow rate calculation part that calculates a flow rate of the target fluid based on the pressure measured by the upstream side pressure sensor, pressure-flow rate characteristics of the fluid resistance member, the upstream side pressure sensor temperature, and the target fluid temperature in the fluid resistance member.

Abstract: An air pressure differential sensing system includes a conduit defining an air passage through which air flows upon application of an air pressure differential across different regions of the air passage, a flap pivotally connected to the conduit, and a sensing device mounted proximate to the air passage and separate from the flap. The flap is configured to move about a pivotal axis in response to the air flowing through the air passage. The sensing device is configured to sense an angular position of the flap about the pivotal axis, the angular position of the flap being a function of the air pressure differential.

Abstract: The present invention provides an oxygen concentrator which allows the flow rate setting to be changed safely and securely by the patient using a remote control device, the oxygen concentrator comprising a control means which does not allow the operation of the flow rate setting change button unless the remote control device receives the information on the flow rate setting value of the oxygen-enriched gas supplied by the current oxygen concentrator main body.

Abstract: A gas supply apparatus including a raw material gas supply system supplying a raw material gas inside a raw material storage tank into the processing container by the carrier gas, the gas supply apparatus includes: a carrier gas passage introducing the carrier gas into the raw material storage tank, a raw material gas passage connecting the raw material storage tank and the processing container to supply the carrier gas and the raw material gas; a pressure control gas passage being connected to the raw material gas passage to supply the pressure control gas; and a valve control unit controlling an opening/closing valve to perform for starting a supply of the pressure control gas into the processing container and simultaneously starting supply of the raw material gas into the processing container from the raw material storage tank, and stopping the supply of the pressure control gas.

Abstract: A heat pump type hot water supply device is provided with a heat source side heat pump unit having a heat radiating heat exchanger that condenses refrigerant to radiate heat from the refrigerant. The hot water supply device is provided with a water tank that stores water, a water supply pipe that supplies water to the water tank from the outside, a water circulation pipe that is extended in a bypassing manner and circulates the water in the water tank from a bottom section to an upper section, a heat absorbing heat exchanger that is arranged on the water circulation pipe and connected to the heat radiating heat exchanger of the heat source side heat pump unit so as to absorb heat, and a hot water supply unit that comprises a hot water supply pipe that supplies warm water in the upper section of the water tank to the outside.

Abstract: Disclosed therein is a fluid flow control device having a cylinder assembly, which includes cylinders overlapped with each other and fluid pathways for controlling flow rate and velocity of fluid, comprising: a first cylinder having a plurality of first fluid pathways of an elongated form horizontally permeating the cylinder from a central axis; a second cylinder disposed on the outer circumference of the first cylinder; and a third cylinder disposed on an outer circumference of the second cylinder.

Abstract: In order to provide a fluid control valve that can flow a large amount of fluid with a compact arrangement, ring-shaped bottom formed grooves that are in communication with an upstream side flow channel through a valve inner flow channel and ring-shaped bottom formed grooves that are in communication with a downstream side flow channel through a valve inner flow channel are arranged alternatively and plurally between a seating surface and a valve seat surface, and a communication bore, which is an opening in communication with the bottom formed groove of the valve inner flow channel, is formed at least on the side surface of the bottom formed groove.

Abstract: A processing system for delivering a process gas to a reaction chamber using a recipe having a recipe flow rate is provided. The processing system includes a gas flow delivery system configured for delivering the process gas, wherein said gas flow delivery system controlled by a mass flow controller (MFC) to an orifice. The predicted flow rate is previously computed by pressurizing a gas. The predicted flow rate further being previously computed measuring a set of upstream pressure values of the gas via at least one sensor. The processing system also includes a programmed computing device configured for applying a calibration factor of a set of calibration factors to determine the predicted flow rate, the calibration factor being a ratio of an average of the set of upstream pressure values to an average of a set of golden upstream pressure values.

Abstract: In a cylinder cabinet of an embodiment, when first pressure in a first gas supply pipe is equal to or less than a predetermined value, a pipe of gas supplied to an external apparatus is switched from the first gas supply pipe to a second gas supply pipe, and when a gas flow rate of gas flowing through the external apparatus is equal to or less than a predetermined value, if a residual gas amount of a first gas container connected to the first gas supply pipe is equal to or more than a predetermined value, the pipe is switched from the second gas supply pipe to the first gas supply pipe.

Abstract: According to one embodiment, a cylinder cabinet includes a controller performing control in such a way that when the amount of a residual gas in a first gas container becomes a predetermined amount or smaller, a gas supply pipe that supplies gas is switched from a first gas supply pipe to a second gas supply pipe. Moreover, the controller performs control in such a way that the residual gas in the first gas container is recovered into the recovery container during a period in which the gas is supplied from a second gas container. Furthermore, the controller performs control in such a way that when the first gas container is replaced with a new gas container, the inside of the first gas supply pipe is purged with the residual gas stored in the recovery container.

Abstract: Methods and systems are provided for monitoring a fuel vapor recovery system including a fuel tank isolation valve coupled between a fuel tank and a canister. During selected conditions, the valve is modulated and pressure pulsations in the fuel vapor recovery system are monitored. Valve degradation is identified based on correlations between the valve modulation and the resultant pressure pulsations.

Abstract: A liquid distribution system having at least one liquid conduit extending from a liquid source to a liquid tap and a method for substantially retaining the temperature of a liquid in the liquid distribution system. When a tapping operation is finished, the liquid is evacuated from the liquid conduit, and a gas is brought into the liquid conduit in order to replace the liquid therein and cause the liquid to flow backwards to the liquid source. When liquid is to be tapped from the liquid tap, the gas is evacuated from the liquid conduit.

Abstract: A flow sensor includes a fluid chamber configured to receive a fluid. A diaphragm assembly is configured to be displaced whenever the fluid within the fluid chamber is displaced. A transducer assembly is configured to monitor the displacement of the diaphragm assembly and generate a signal based, at least in part, upon the quantity of fluid displaced within the fluid chamber.

Abstract: A control arrangement for a gas exchange valve in a piston engine adapted between the camshaft of the engine and the valve mechanism, which control arrangement comprises a body part and a chamber arranged therein, into which chamber a connection for hydraulic medium opens and in which a piston device is arranged in force transmission connection with the camshaft and the valve mechanism. The connection for hydraulic medium opens to a space in the chamber, which space increases as the piston device moves in the opening direction of the valve, whereby hydraulic medium is arranged to flow into the space, when the valve is being opened, and out of the space, when the valve is being closed.

Abstract: A control system for use in conjunction with a primary power system and operable to control a pneumatically powered hand-held tool broadly comprises an air delivery assembly operable to communicate with a pressurized air source; a control assembly including an exhaust line from the primary power system and to the control assembly, a spool valve in fluid communication with the supply line and the exhaust line, and a control line in fluid communication with the spool valve and the hand-held tool; a tool assembly comprising the hand-held tool for performing delicate hand working operations; and a housing for at least partial storage of the air delivery assembly and the control assembly. The primary power system and the control system operate in conjunction with each other to both power and precisely control a pneumatically powered hand-held tool.

Abstract: An apparatus and method for controlling the flow of fluids such as liquids or gasses. The apparatus may include an input control valve, an input manifold, first, second, and third further control valves, first, second, and third flow meters, first, second, and third check valves, and an output manifold. The apparatus may further include a control central processing unit which controls the input control valve, the first, second, and third further control valves, and the output control valve. The control central processing unit may receive one or more signals concerning fluid flow through the first, second, and third flow meters and may control flow through the meters by controlling one or more valves. Each of the first, second, and third flow meters may be a coriolis flow meter.

Abstract: Disclosed is a gas release device that is adapted to be secured to an inflatable article. The device includes an container, which can be a commercially available gas bottle, a salinity sensor, and an end cap. The salinity sensor operates an electrically fireable primer that serves to release an inflation gas from the container and inflate the article. The end cap includes a cylindrical through hole that accepts a rotatable D-ring. The D-ring is dimensioned to fit over the valve of the inflatable article. The D-ring includes a series of peripheral apertures that can be selectively aligned with a slot to create a fluid passage between the container and valve. The D-ring allows the device to be rotated between different angular positions while maintaining a pneumatic coupling between to the inflatable article and the container.

Abstract: The invention relates to a device suitable for retrofitting in laid pipelines. Said device is intended to be able to be placed and fixed in place in the pipeline. Transport of the device to the installation location is intended to be performed using as little force as necessary, and the sealing element is intended to be displaced without contact and thus without wear. To this end, the device, in the interior of which a shut-off device (6) is disposed, is designed so that an offset, conically tapering region (10) is adjacent to a front cylindrical region (3) and is bounded by a stop collar (12) on which a connecting contour (7) for a coupling piece of a drive element is connected. A sliding piece (13) made of an expandable material is displaceably disposed in the axial direction on the conically tapering region (10), comprising a circumferential groove in which a spring-loaded clamping ring (15) is supported.

Abstract: An insertion type fluid volume meter and control system comprises a non-ferrous pipe, an electromagnet device, a pair of electrodes, a flow control valve, and a flow controller. The electromagnet device is for building up a pulsed square wave magnetic field across the conductive liquid flowing through the non-ferrous pipe. The pair of electrodes are disposed on outer surface of the non-ferrous pipe for detecting an electromotive force induced by Faraday's induction law. The flow control valve is disposed in the non-ferrous pipe for controlling amount of flow. The flow controller is configured to receive output signal consisting of the induced electromotive force from the pair of electrodes and control the flow control valve base on the measured flow amount.

Abstract: A system for collecting an anaesthetic agent, having at least one anaesthetic gas scavenging system (AGSS) for receiving exhaust gas from a plurality of sources, the exhaust gas including the anaesthetic agent to be collected, each AGSS comprising at least one power source for providing suction of the exhaust gas from the plurality of sources under negative pressure, and a central collection system for receiving the exhaust gas, the central collection system comprising at least one collector for collecting the anaesthetic agent from the exhaust gas, wherein the at least one collector is configured to adsorb the anaesthetic agent from the exhaust gas. The central collection system may be configured to received the exhaust gases from the at least one AGSS, with the central collection system being located downstream of the at least one AGSS.

Abstract: A fluid control valve, which includes a body forming a fluid passage and including a sealing surface positioned in the fluid passage, a valve body configured to rotate between an open position and closed position within the fluid passage, an elastic sealing member provided at a rim portion of the valve body, and a lip portion extended from the elastic sealing member to be directed towards a center portion of the valve body. The lip portion contacts the sealing surface and a surface of the lip portion facing the sealing surface is exposed to the fluid passage.

Abstract: In a pressure reducing valve, a valve body is slidably fitted in a valve housing with an annular seal member disposed member disposed between the valve body and the valve housing; a black pressure chamber is formed within the valve housing with an end part, on a side opposite to a valve seat, of the valve body facing the back pressure chamber; and a pressure-receiving member that operates in response to fluid pressure on the downstream side of the valve seat is linked to the valve body. The valve housing is provided with a guide hole (31) having a smaller diameter than a seal diameter of the valve body (34) provided by a seal member (35) so that a guide portion (34c) coaxially possessed by the valve body (34) is slidably fitted in the guide hole (31). Accordingly, it enables the length of a sliding section of a valve body to be set short even when the eat is large, thus reducing the dimensions.

Abstract: An ablutionary installation including a mixing valve having respective inlets for hot and cold water and an outlet for temperature controlled water, a temperature sensor for monitoring outlet water temperature and providing a signal representative of the outlet water temperature to an electronic controller, a user interface permitting selection of outlet water temperature up to a pre-determined temperature, the electronic controller being operable to compare the selected and sensed outlet water temperatures for controlling the mixing valve to adjust the ratio of hot and cold water delivered to the outlet according to the selected outlet water temperature, and apparatus for initiating a disinfection cycle to deliver water to the outlet at a temperature higher than the pre-determined temperature, wherein the initiating apparatus includes an operating sequence with at least two inputs.

Abstract: An improved apparatus and method for monitoring the levels of propane or other consumable liquid in remotely located storage tanks and coordinating delivery of liquid to those tanks, including an improved method of using the remote monitoring data to identify out-of-ordinary conditions at remote tanks, optimally schedule purchases or deliveries, improve safety, and more efficiently operate a propane dealership. More accurate and timely information concerning the status of customer tanks serves to improve operational efficiencies and increase safety. Data received from remote sensors can be collected and organized so that it is easily understood and utilized through the implementation of a user interface accessible via the Internet that allows the information to be presented in an efficient graphical and contextual fashion.

Abstract: A piston actuated diverter valve is employed to recirculate air through a turbocharger compressor when the device is not activated in an engine. An example diverter valve includes a housing forming a cylinder. A piston is arranged within the cylinder and an aperture passes from an exterior of the housing into the cylinder. A conduit is connected to the cylinder such that a pressurized fluid in the conduit acts to move the piston within the cylinder to cover and/or uncover the aperture.

Abstract: A flow control valve includes a first passage portion having a seal portion formed at the rim of the opening of an outlet port of a first passage, a second passage portion having a second passage inflected from the first passage, and a valve plate. The valve plate has a valve body for opening and closing the outlet port, and a mounted portion formed at the outside peripheral end of the valve body and adapted for mounting to the mounting portion, and is adapted to open and close with mounted portion as the fulcrum point. The valve body includes a seat portion adapted to seat onto the seal portion, and an extension portion integrally formed with the seat portion and protruding towards the outflow side of the second passage from the seal portion.

Abstract: A liquid flow control device has a port or passageway through which liquid flow is to be controlled. A body of a liquid swellable material is located in the port or passageway having an upstream side and a downstream side in relation to the direction of liquid flow through the port or passageway. A layer of sealing material is provided on the upstream side of the body to prevent contact of that side of the body with the liquid when the body is swollen to close the port or passageway whilst allowing contact of the downstream side of the body when the body is in the non-swollen condition allowing liquid flow through the port or passageway.

Abstract: A control device has a control drive for operating a valve or some other apparatus, for example an adjustment device for the pitch angle of a wind rotor, by means of a control element. This control drive is associated with an emergency operating device, via which the control element can be reset in the event of a disturbance, essentially independently of the operation of the control drive. This emergency operating device has an energy store, whose stored energy can be released for resetting.

Abstract: A valve for downhole use has the ability to throttle between fully open and closed and is fully variable in positions in between. The valve is preferably responsive to flowing fluid viscosity and uses a three dimensional flow through restrictor in combination with a relatively movable cover. At a given flow, a higher viscosity fluid will create a greater relative movement and make it possible for flowing fluid to bypass more of the flow through member. In a particular application involving production from a zone, an array of such valves can allow more production where the viscosity is higher and less production where the viscosity drops due to, for example, water production.

Abstract: An encoder to be mounted to a shaft extending from a piston meter configured to compute a volume of distributed fluid includes a magnet affixed to the shaft via a floating magnet holder, a magnetic sensor configured to sense the flux density and direction of a magnetic field created by the magnet and to output a signal indicating the flux density and direction of the magnetic field to a printed circuit board, and the printed circuit board configured to output a signal indicating the volume of distributed fluid if the encoder has not been tampered with and configured to output an error signal if the encoder has been tampered with.

Abstract: A system for generating gas includes a gas source which includes a gas generator and a gas compressor. The system also includes a gas management apparatus in a flow path between the gas source and gas sink. The gas management apparatus includes a primary pressure vessel that stores gas when a gas source flow rate exceeds a gas sink flow rate, and that releases stored gas when the gas source flow rate is less than the gas sink flow rate. The gas management apparatus also includes a primary variable state material that absorbs the gas when in an absorptive state, and releases the gas in a releasing state.

Abstract: An entertainment system (1019, 2) having a fluid system with a smoke generator (1007, 4), the smoke generator being supplied from at least one pump (1005, 8, 10) connected to at least one container for fluid (1003, 12, 14), which at least one pump (1005, 8, 10) is controlled by a controller (1009, 6), wherein the controller is adapted to perform a shutdown process upon malfunctioning of at least a part of the entertainment system. The shutdown process performs a purge of at least part of the fluid system. Furthermore, a method of operating the entertainment system (1001, 2), has the steps of performing a shutdown process upon malfunctioning of at least a part of the entertainment system, the shutdown process including the step of purging (2009, 3003a, 3003b) at least a part of said fluid system.

Abstract: A method for controlling a safety feature for a hydraulic machine is provided. The method includes detecting when at least control valve for a controller of an implement for the hydraulic machine is stuck in a position. An exhaust valve for the hydraulic control system is then moved to a closed position to prevent movement of the implement of the hydraulic machine.

Abstract: A control device for a quick-closing valve of a steam turbine including a relief valve for reducing a hydraulic pressure opening the quick-closing valve, and a relief valve control valve arrangement having at least three valves which are hydraulically interconnected with the relief valve in such a way that the relief valve does not close the quick-closing valve unless at least two valves of the relief valve control valve arrangement are switched to a quick-closing position. The system includes a test control valve arrangement for selectively reducing and increasing the hydraulic pressure opening the quick-closing valve when the relief valve is closed.

Abstract: An apparatus for continuously controlling fluid flow in a sewer conduit, comprising: a) moisture sensors detecting levels of fluid in this conduit; b) an inflatable bladder, mounted in the sewer conduit for releasably sealing in fluid tight fashion a section of this conduit; an air compressor, for inflating the bladder; and a control box including a CPU, sensitive to the moisture sensor and actuating the air compressor responsively to conduit fluid level conditions reaching beyond a preset threshold value. The performance of the apparatus is independent of the speed of fluid flow in the sewer conduit.

Abstract: A lance holder 1 characterized by a high degree of operational safety is equipped with a mounting or a pipe fixing, which safely prevents a rotation even of a bent lance pipe 2 in the lance holder 1. The clamping head 3 has a fixing part 4 and a clamping part 5, which ensure a punctiform fixation by way of displaceable pressure elements 14, particularly in the form of spheres 15. At least three such spheres 15 are disposed across the circumference in a distributed manner, and ensure the safe fixation across a large tolerance range with regard to the dimensions of the lance pipes 2. Said large tolerance region is further secured in that sealing sleeves 6 having a larger inside diameter may be used, since the same are no longer deformed in the longitudinal direction in order to provide the seal, but instead are deformed in the radial direction. In summary the high degree of operational safety is also completed by the association of a chip 47 and/or attachment of a nanocoating 53.

Abstract: An auto bleed valve and method of bleeding a hydraulic system of an aircraft is accomplished by illuminating a plenum of a bleed valve using an LED oriented to illuminate a phototransistor when air is present in the plenum. A comparator circuit is used on an output of the phototransistor such that a predetermined voltage output corresponds to air detected in the plenum. An integrating circuit and a second comparator in series with the first comparator circuit is used to determine when a predetermined time period is met in which air is continuously detected in the plenum. Thereafter an air bleed solenoid can be used to vent the air upon a signal from the aircraft computer logic system.

Abstract: Disclosed is an automatic pressure reducing valve. A body includes a hollow portion, an inlet portion and an outlet portion for flow of a fluid and has an internal space. A cylinder is installed inside the hollow portion and has at least two holes formed in its wall. An piston is movable along the inner side of the cylinder and adjusts opening rate of the holes according to a fluid pressure difference between an inlet portion and an outlet portion.

Abstract: The invention relates to a distribution valve with integrated flow metering unit, in particular for warm water heating systems, for use in a pipe, wherein a closable valve seat in the distribution valve and an axially movable sealing part thereto are provided, wherein one section of the sealing part is held and guided in an attachment element which is arranged externally against an opening in the pipe and said section of the sealing part has a handle wherein a stroke limiter limiting the axial displacement of the sealing part is allocated to the sealing part and slash all to the controlling attachment element.

Abstract: A method of controlling the flow of a multiphase fluid through a pipeline that includes a riser pipe with a choke valve comprises receiving multiple signals dependent on fluid flow properties from a plurality of sensors in the topside area of the riser pipe, analysing the signals to establish a vector of measurement weights, the product of the vector of measurement weights and a corresponding vector of the signal values of a given time being dependent on the severity of a slug flow forming in the system. Further signals dependent on fluid flow properties are received from the plurality of sensors in the topside area of the riser pipe. A set position for the choke valve is then determined from the product of the vector of measurement weights and further values of signals to restrict characteristics of the flow in the topside from moving towards a severely slugging flow regime.

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: An inert gas Fire Protection System (FPS) uses an inert gas rather than air in a dry or pre-action type FPS. The inert gas inhibits oxidation, galvanic corrosion, and/or bacterial growth, and hence mitigates Microbiologically Influenced Corrosion (MIC) and galvanic corrosion in the FPS piping. A zone purging valve, which may include a gas purity analyzer, is disposed at the end of each zone in the FPS. A controller over-pressurizes the FPS with inert gas, and bleeds the gas through the zone purging valves to a predetermined supervisory pressure. The pressurize/purge cycle is repeated to ensure inert gas of a predetermined purity level reaches all areas within the FPS. The purity of the inert gas is periodically measured in bleed operations. The inert gas may comprise Nitrogen, which additionally dries out residual water in the FPS due to a low dew point, further inhibiting MIC.