Abstract: Systems and methods for infusion of fluids using stored potential energy and a variable flow resistor. In one aspect of the present disclosure, there is provided an infusion device that includes a plunger situated within a vessel so as to define a chamber within which a volume of fluid can be accommodated between a downstream surface of the plunger and the vessel. The infusion device further includes an outflow path through which the fluid in the chamber can be dispensed upon displacement of the plunger by a force acting thereon. A variable flow resistor is situated within the outflow path and is configured to allow a substantially constant fluid flow rate from the vessel to be maintained as the force acting on the plunger decreases.

Abstract: A regulator comprises a regulator valve and an actuator. The actuator is coupled to the regulator valve and comprises a control element for controlling the flow of fluid through the regulator valve. The regulator valve is equipped with a self-aligning valve port that includes a retaining portion, a biased portion disposed within the retaining portion, and a biasing member disposed between the retaining portion and the biased portion. The self-aligning valve port advantageously automatically adjusts to achieve sealed engagement with the control element of the actuator, thereby improving regulator performance.

Abstract: A pressure relief assembly may include an actuator stem having a plurality of retaining grooves. A relief plate may be operatively connected to the actuator stem and a diaphragm plate may be operatively connected to the actuator stem. A diaphragm may be least partially disposed between the relief plate and the diaphragm plate. A relief spring seat may be releasably attached to the actuator stem at one of the plurality of retaining grooves.

Abstract: A fluidic control system includes featured layers. The featured layers include two or more features which collectively form at least one functional component.

Abstract: A mechanism to dispense a carbonated beverage from a closed package may include reducing a pressure of a gas from a cartridge using one or more pressure regulators coupled to the cartridge. Further, the flow rate of the gas having the reduced pressure may be regulated using a flow regulator coupled to the one or more pressure regulators. The flow regulator may be coupled to a dispensing head comprising a sequential arrangement of a snifting valve and a dispensing valve. Using the sequential arrangement, the gas whose flow rate is regulated may be released into the closed package to dispense a carbonated beverage in the closed container at a controlled rate to minimize a foaming.

Abstract: Improved valve seats for pressure regulators, as well as improved pressure regulators, are disclosed. For example, in one disclosed embodiment, a valve seat may comprise a first valve seat surface; a second valve seat surface opposite the first valve seat surface; a compression seal area; and a concentric stress relief groove on the first valve seat surface.

Abstract: A forward check valve and a fuel cell system are provided which include a valve portion including a valve body, a supporting portion, a hole, and a fixation portion. The valve body contacts a valve seat when the valve portion is accommodated in an opening. The supporting portion supports the valve body so that the valve body is movable in directions in which the valve body moves towards and away from the valve seat. The fixation portion contacts an inner peripheral surface defining the opening of a valve housing to fix the supporting portion when the valve portion is accommodated in the opening. The fixation portion includes protruding portions that protrude from a mount surface of the valve housing when the valve portion is accommodated in the opening. By fitting the valve portion to the opening, the valve portion is accommodated in the opening of the valve housing.

Abstract: A device capable of dividing the difference between inlet and outlet pressures in a pressure reducing system, in a given proportion, between a conventional control valve and a regulating device, wherein the latter comprises a cylindrical housing being attached to said control valve, having perforations and an interior sliding piston featuring similar perforations, and where the piston is motivated by an inlet pressure pressurized diaphragm, whose force is counteracted by a compression spring.

Abstract: A pressure governor includes a first valve that determines the introducing pressure and a second valve that determines the releasing pressure. A first valve receiving chamber in which the first valve is received and a second valve receiving chamber in which the second valve is received are formed independently from each other. Thus, there is no need to form the valves coaxially, and each valve can be easily fabricated with high accuracy by simple processing.

Abstract: The present invention concerns a circuit board (100) having at least one fluid passage (110) arranged in the interior of a circuit board (100), having a fluid passage opening (120) which is arranged on a surface of the circuit board (100) and which leads to the fluid passage (110, and a multi-part pressure-relief valve arrangement (200) for reducing an excess pressure in the fluid passage (110), which includes a first magnet (210), a second magnet (220) and a sealing closure (230), wherein the first magnet (210) and the second magnet (220) are so arranged that they press the sealing closure (230) on to the fluid passage opening (2120) by a magnetic force (250) afforded by the first magnet (210) and by the second magnet (220).

Abstract: A system and method for gasflow management to ensure that the output pressure is within a safety range. Upon entering the input terminal, the input source may pass through a switch valve to reach a pressure-reducing valve so that the pressure is reduced to a reduced pressure level. Then, the reduced pressure level is checked by the release valve and is lowered if the reduced pressure level is higher than the cutoff pressure associated with the release valve. The reduced pressure level is also sensed by a pressure sensor so that the controller can shut off the operation if the pressure reading is not within a safety range.

Abstract: A pressure regulator (500) is provided. The pressure regulator (500) comprises a housing (503), a fluid inlet (508) to receive a pressurized fluid at an inlet pressure, and a fluid outlet (510) to output the pressurized fluid at a regulated pressure. The pressure regulator (500) further includes a regulating piston (504) movable within the housing (503) to provide fluid communication between the fluid inlet (508) and the fluid outlet (510). The regulating piston (504) includes a first end (505) comprising a first cross-sectional width (D,) in fluid communication with the fluid inlet (508) and a second end (509) comprising a second cross-sectional width (D2) in fluid communication with the fluid outlet (510). The first and second cross-sectional widths (D15 D2) are sized such that the regulated pressure at the fluid outlet (510) is correlated to the inlet pressure at the fluid inlet (508).

Abstract: The present invention provides for an integrated valve regulator assembly that comprises an integral body having a base portion that includes an axis for mounting on and coaxially with the neck portion of a pressurized source vessel and an assembly outlet, a defined internal passage in the integral body that extends through and between the base portion of the integral body and the assembly outlet, a sub-atmospheric pressure regulator assembled within the integral body of the integrated valve regulator assembly, an isolation valve positioned within the defined internal passage of the integral body and located downstream from and in communication with the sub-atmospheric pressure regulator, and a filling port disposed between the axis for mounting on and coaxially with the neck portion of the pressurized source vessel and the sub-atmospheric pressure regulator.

Abstract: A pressure regulating valve assembly includes a pressure regulating valve sleeve and a pressure regulating valve spool. The pressure regulating valve sleeve includes a first window set and a second window set. The pressure regulating valve spool includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion formed between the first and second cylindrical portions. The pressure regulating valve spool also includes an angled bucket formed on the first cylindrical portion having a high gain portion of a first width, a low gain portion of a second width, and a ratio of the first width to the second width between 1.44 and 1.47. The pressure regulating valve spool further includes an angled outlet surface. The angled bucket is configured to align with the first window set and the angled outlet surface is configured to align with the second window set.

Abstract: An adjustable damping valve device (27), in particular for a vibration damper, comprises a first valve (47) and an emergency operation valve (61), both of which are actuated by magnetic force. The emergency operation has a valve body (61) which is preloaded in a closed position by at least one valve spring. A pressure-relief valve (85) is connected hydraulically in parallel with the emergency operation valve (61) so that the damping force is determined by the pressure-relief valve (85) when the emergency operation valve (61) is closed. The pressure-relief valve (85) is arranged in the valve body (63) of the emergency operation valve.

Abstract: The pressure limiting valve has a low pressure gauge configured to measure the operability of a backflow prevention device having a line pressure relatively higher than the maximum PSI rating of the low pressure gauge. The valve body has an inlet statically coupled to a pressurized fluid source and an outlet coupled to the low pressure gauge. Upper and lower chambers fluidly coupled via a conduit are formed from an interior portion of the valve body and generally separated by a flexible diaphragm. A spring actuable via movement of the flexible diaphragm in response to pressure changes in the valve body biases a closure seat in an open position relative to the outlet when the valve body is not under pressure, and compresses under pressure to permit the closure seat to seal the outlet when pressure in the valve body reaches a maximum PSI rating of the low pressure gauge.

Abstract: The present invention provides a pressure reducing valve having excellent responsiveness, durability, and reliability and stable output characteristics. A pressure reducing valve includes a housing, and the housing includes a valve passage connected to a primary port and a secondary port. A valve element is provided in the housing. The valve element can adjust an opening degree of the valve passage by moving between a closed position where the valve element closes the valve passage and an open position where the valve element opens the valve passage. The valve element is pressed toward the closed position by secondary pressure. A spring member is provided to bias the valve element toward the open position against the secondary pressure. Further, a rolling bearing is provided on the valve element, and the valve element is movably supported by the rolling bearing.

Abstract: A fluid supply device includes a fluid supply source, a valve, a differential-pressure generator, and a pressurizing device. The valve includes a casing, a displacement member that divides an inside of the casing into a first valve chamber and a second valve chamber, the displacement member being displaced by a pressure of a fluid being exerted on a front main surface and a back main surface of the displacement member, a first opening provided in the first valve chamber, a second opening provided in the first valve chamber, and a third opening provided in the second valve chamber. Thus, flow rate fluctuations are reduced even when the pressure on the ejection side or the suction side of the device fluctuates due to changes in atmospheric conditions.

Abstract: A valve, for example for controlling a clearance at a tip of turbine blades, includes a piston and a supply mechanism supplying fluid under pressure to cause the piston to move inside a hollow body, and a mechanism detecting a position of the piston, including a shut-off element that moves as one with the piston and is mounted such that it can move in a fluid passage between two positions, open and closed respectively, the fluid passage connecting the supply mechanism to a pressure sensor that generates an output signal representative of the position of the piston of the valve.

Abstract: A pressure regulator for controlling the flow of gas from a high pressure source to a low pressure device includes a body having a high pressure inlet defining a seat. An adjusting collar has a centrally located bore. The collar engages the body at any predefined radial orientation. The collar has a thread and is securable to the body at the selected radial orientation. The regulator also has a threaded bonnet to engage the collar. A locking ring engages the body and secures the adjusting collar to the body. A piston has a central bore and is disposed within a piston chamber that defines a gap between the piston and a wall. The piston is movable between an open condition and a closed condition. A spring moves the piston to the open condition. A pin valve is disposed in the central longitudinal bore in the piston.

Abstract: Embodiments of a fluid flow regulating device and methods of using the same are described. Certain embodiments manages fluid flow between one or more input ports and output ports at least partly in response to fluid pressure changes and/or by a mechanism driven by fluid flow, optionally without using electrical power.

Abstract: A pressure/flow regulator includes a pressure control valve, a flow control valve, and a first control connection configured to set a variable displacement pump. The control connection is configured to be discharged to a tank by the flow control valve via a control edge of the pressure control valve that is open in the idle position of a valve piston of the pressure control valve.

Abstract: A fluid flow control system has a heating device for heating a fluid and a first flow path for providing the heated fluid from the heating device to a use region. A heat exchanger has a supply path that received fluid from a fluid supply, and an outlet path that receives fluid from the use region, whereby the fluid in the supply path is pre-heated by the fluid in the outlet path. A second flow path provides pre-heated fluid from the supply path of the heat exchanger to the heating device. Modulating devices control fluid flow through the outlet path along the supply path. A flow control device controls the modulating devices such that the fluid flow rates in the fluid supply path and outlet path of the heat exchanger are balanced, so as to be substantially the same.

Abstract: A fluid regulating device includes a valve disc and a valve port adapted to provide a secondary seal during an obstructed closing operation, whereby the valve disc directly engages a housing component of the valve port to maximize the integrity of the secondary seal and advantageously reduce the size and complexity of existing valve ports. The valve port comprises a housing and a cartridge slidably disposed in the housing. The valve disc directly engages a primary seat carried by the cartridge during a normal closing operation. During an obstructed closing operation, however, the cartridge is pushed into the housing such that the valve disc directly engages a secondary seat carried by the housing at a location that is downstream of the cartridge.

Abstract: A fluid pressure control device, including a pressurized fluid inlet, a first valve in fluid communication with the pressurized fluid inlet and controlling the flow of fluid from the pressurized fluid inlet, a first pressure measurement device detecting a fluid pressure downstream of the first valve, and a controller electrically coupled to the first valve. The first pressure measurement device causes the controller to operate the first valve such that a fluid downstream of the first valve is maintained at a substantially constant pressure.

Abstract: A method for determining a characteristic for a pressure regulating valve of an injection system is described, using which fuel is injected into an internal combustion engine, in which a flow of the fuel which flows through the pressure regulating valve is set to a minimum and a control pressure of the fuel is reduced until the pressure regulating valve is opened, and in which at least one value for the characteristic is formed from a difference between a value for the control pressure, at which the pressure regulating valve opens, and a reference value for the control pressure.

Abstract: A pressure-regulating arrangement includes a main line through which a flow can pass from an intake to an output and in which an adjustable nozzle is arranged. The pressure-regulating arrangement further includes a pressure-regulating valve having a pressure connection which is connected to the main line downstream of the nozzle. A valve body of the pressure-regulating valve is movable from a basic position in an opening direction to increase an outlet pressure of an outlet connection. A first pressure which is tapped off from the main line upstream of the nozzle acts in the opening direction. The outlet pressure and a second pressure, which is tapped off from the main line downstream of the nozzle, act in a closing direction, which is opposed to the opening direction, in order to reduce the outlet pressure.

Abstract: A pressure reducer assembly having a connection fitting for connecting the pressure reducer assembly to a pipe or other water containing element, the connection fitting having a housing with an opening, an inlet exposed to an inlet pressure, an outlet exposed to an outlet pressure, and a separating wall inside the housing for separating the inlet from the outlet and having an opening in the separating wall. A pressure reducer insert extends from the housing opening. The pressure reducer insert is designed in such a way that the pressure effective cross section of the pressure reducer insert which is exposed to the inlet pressure is essentially the same as the pressure effective cross section of the pressure reducer insert in the opening in the separating wall exposed to the inlet pressure. This allows the pressure reducer insert to be made of plastic material.

Abstract: A hydraulic pressure control system for a torque converter includes a lock-up clutch operated according to pressure difference between an engagement and disengagement side oil chambers, a first hydraulic line communicated with the disengagement side oil chamber, second and third hydraulic lines communicated with the engagement side oil chamber, and a lock-up switch valve and a torque converter hydraulic pressure control valve that generate pressure difference between the second and the third hydraulic line communicated so that fluid within the engagement side oil chamber is circulated in lock-up on state of the lock-up clutch, and the lock-up switch valve and the torque converter hydraulic pressure control valve generate pressure difference between the second and the third hydraulic line in slip state of the lock-up clutch higher than the pressure difference between the second and the third hydraulic line in the lock-up on state of the lock-up clutch.

Abstract: A pressure reducer includes a housing with an axially displaceable biased control body in order to close a connection between an inlet and an expansion chamber, where the housing is equipped with an axially displaceable biased actuating piston in order to displace the control body against the spring load of the control body as a function of the pressure in the expansion chamber and to open the connection, the housing being made of plastic, and the pressure reducer includes a separately made insert, where the insert is fixed between the inlet and the expansion chamber in the plastic housing and said insert has a guide bore, which is connected to the inlet and supports the control body, and a connecting bore, which adjoins the guide bore and which opens into the expansion chamber, where the insert forms an annular shoulder surface between the connecting bore and the guide bore, said shoulder surface interacting as a seating surface with the seal on the control body.

Abstract: A gas flow device and method are provided for controlling the flow of gases into a process chamber. The gas flow device includes one of more pressure reduction stages, a metering valve, a pressure gauge, and a control system. the gas flow device provides a steady and stable flow of gas from a gas source to a process chamber held at sub-atmospheric pressure.

Abstract: The invention described herein pertains to an improved method of controlling the flow of gases into a process chamber. The method incorporates a gas source, one or more pressure reduction stages, a throttle valve, a pressure gauge, and a control system. When connected to a process chamber held at sub-atmospheric pressure, the invention provides a steady flow of gas such that the stability of said flow is superior to many commercially available metering devices, such as thermally-based mass flow controllers.

Abstract: A pressure regulating device has a pressure regulating valve with a valve casing and a regulating unit which is movable relative to the former. The regulating unit contains an actuation element which may be moved by a control pressure, and two first and second closing members, each spring-biased in a closed position, which may be switched by the actuation element. The connection between a primary port and a secondary port is controlled by the first closing member. Fixed immovably to the actuation element is a restrictor element which is moved into a restriction position when the actuation element is so positioned that the first closing member is normally moved into its closed position. If, because of a fault, the first closing member is not moved into the closed position, only a very small amount of pressure medium flows to the secondary port, so that consequential damage may be avoided.

Abstract: An irrigation emitter is provided for delivering irrigation water from a water supply conduit, such as an irrigation supply tube, pipe, or other water supply apparatus, at a low volume or drip-like flow rate. The emitter operates generally through the use of a reduced size orifice and a relatively long tortuous flow channel that cause a pressure reduction between the water supply conduit and an emitter outlet. The emitter includes an inlet for tapping a portion of the water flow from the water supply conduit and, when the water pressure is above a predetermined minimum level, directing the flow to and through the flow channel for subsequent discharge to a desired location. The emitter also may regulate to accommodate for changes in supply pressure. The emitter also may include multiple emitter outlets.

Abstract: A system for the controlled storage and dispensing of a hazardous material at super-atmospheric pressure comprises a pressurized source vessel and the integrated valve regulator assembly of the present invention. The system comprises a pressurized source vessel and the integrated valve regulator assembly that includes a super-atmospheric pressure regulator.

Abstract: A pressure-control valve includes a housing, a coil carrier, a coil wound on the coil carrier, a first bearing, an armature comprising a valve member. The armature is configured to be axially displaced in the first bearing. A core. A flux guiding device. A connection sleeve comprises a valve seat for the valve member. A first connection bore is configured to be connected with a tank and with the connection sleeve. A second connection bore is configured to be connected with a consumer. An end of the connection sleeve distant from the core comprises a control bore with a control member supported therein.

Abstract: A pressure regulator is capable of automatically regulating the inlet water pressure to a compressed air foam system (CAFS), thereby allowing direct connection between a high-pressure water source, such as a hydrant, and the CAFS. The pressure regulator includes an inlet, a valve that regulates flow from the inlet, and an annular piston that circumscribes the inlet and which is linked to the valve. The relative area of the inlet and the piston determine the maximum pressure that may be attained at the CAFS water inlet, due to pressure on the piston forcing the valve closed.

Abstract: A valve assembly (1) for measuring differential pressures in a fluid system where the valve assembly includes a differential pressure sensor (12) for registration of differential pressures, a first cavity (22) with a calibrating cone (10) displaceable between measuring and a zero point calibration/flushing position. The valve assembly (1) includes a valve body (7) with two connections (13, 14) and a second cavity (15) arranged with a safety valve cone (8) which protects the differential pressure sensor (12). The safety valve cone (8), by differential pressures higher than a dimensioned value, is moved in a direction towards the low pressure side and, as a result, a passage between high and low pressure side is opened, from one connection (13) to the other connection (14) via the second cavity (15) and via provided cavities (24) and recesses (25) in the safety valve cone (8), whereby a pressure equalizing occurs.

Abstract: A pressure reducing apparatus includes a body being equipped with a first side port through which a pressure fluid is supplied and a second side port through which the pressure fluid having been reduced in pressure is discharged. Further, a feedback passage is formed, which establishes communication between the second side port and a third diaphragm chamber that faces toward a pilot valve. Additionally, a pressure fluid that flows through the second side port is introduced through the feedback passage into the third diaphragm chamber, whereby a third diaphragm is pressed upwardly against an elastic force of a second spring into equilibrium.

Abstract: An example internal relief valve disclosed herein includes a relief valve seat coupled to a first end of the relief valve stem and to engage a first side of a sensing apparatus to prevent fluid flow between the first side of the sensing apparatus and a second side of the sensing apparatus when the internal relief valve is in a closed position. A bleed hole within a surface of the sensing apparatus and separate from the opening of the sensing apparatus is dimensioned to provide a controlled flow rate between the first side and the second side of the sensing apparatus when the internal relief valve is in an open position. A seal is disposed along a body of the relief valve stem upstream from the bleed hole and the valve seat to prevent fluid flow between the first side of the sensing apparatus and the second side of the sensing apparatus via the opening of the sensing apparatus when the relief valve is in the open position.

Abstract: An aircraft store ejector systems and subsystems thereof. Embodiments can include a two-reservoir re-pressurization system wherein a remote reservoir is used to maintain desired pressure in a local ejector reservoir. The system can include a release valve having a vent valve and valve piston. The release valve can control release of pressurized gas to a pitch control valve. The pitch control valve can be configured to distribute the pressurized gas between two or more ejector piston assemblies. One or more of the ejector piston assemblies can include multiple concentric piston stages and piston chambers, the piston chambers configured to contain a volume of gas. The ejector piston assemblies can be configured to compress the volume of gas within the piston chambers as the piston stages are extended out from the aircraft. Such compression can provide a return force to the piston stages.

Abstract: A gas regulating fitting that ensures simple manual operation is to be created. In particular, the device is to be capable of being switched both on and off in one operation. To that end, a microswitch (12) connected to an electronic control unit is arranged on the housing (1). The microswitch is operated when a tappet (10) arranged axially to the safety pilot valve (26) and the main valve (19) is manually operated. The electronic control unit thereby receives an electrical signal whereby the gas regulating fitting is activated in its switched-off state, and the gas flow flowing through the open safety pilot valve (26) is therefore ignited, whereas the holding current flowing to the thermoelectric safety pilot valve (26) is interrupted in the switched-on state of the gas regulating fitting, and the gas regulating fitting is therefore deactivated. The gas regulating fitting can be used to ignite and regulate a gas flow flowing to a burner.

Abstract: A pressure regulation tracking valve for maintaining the pressure of a gas relative to that of a process fluid includes a device, responsive to change in the pressure of the process fluid, for changing the pressure of the gas by substantially the same amount. The valve further includes a device for accommodating a pressure transfer medium for transferring the pressure of the process fluid to the gas pressure changing device. As a result, contact between the process fluid and the gas pressure changing device is avoided.

Abstract: A process fluid regulator includes a regulator body having a fluid inlet and a fluid outlet connected by a fluid flow path. A control element is disposed within the fluid flow path, the control element cooperating with a seat to control fluid flow through the regulator body. An actuator is attached to the regulator body, the actuator providing force to move the control element relative to the seat. The actuator includes a housing and a diaphragm within the housing, the diaphragm dividing the actuator housing into an upper chamber and a lower chamber. A high pressure bleed valve is attached to the lower chamber to vent residual gas from the lower chamber, which creates additional volume for process liquid in the lower chamber. This additional volume improves effectiveness and response time of the process fluid regulator.

Abstract: A pressure-control valve includes a housing (110) and a valve assembly (115) at least partially disposed within the housing. The housing has a sidewall (112) defining a conduit connecting an inlet opening (116) and an outlet opening (118), wherein the housing has a pressure vent (119) extending through the sidewall. The valve assembly includes: a valve seat (140), a valve support (120), a slidable member (130), and a biasing member (150). The slidable member is reversibly slidable between an open position and a closed position. The closed position interrupts fluid communication through the conduit between the inlet opening and the outlet opening. The slidable member has an upstream effective cross-sectional area greater than its downstream effective cross-sectional area. Sealing members (137,139) forming seals between the slidable member and the sidewall, and a pressure vent is disposed between the seals. A biasing member (150) biases the valve assembly (155) toward the open position.

Abstract: Pressure regulator assemblies that are overall small in size, have a thin form factor, can be repeatedly manufactured at relatively low cost and which can avoid the use of poppet valves, pivots, sliding members or rubber and metal diaphragms are disclosed. These pressure regulator assemblies can find utility in small or micro-fluidic applications, such as fuel cell systems, for example. The fluid to be regulated by the assemblies can be a liquid or gas.

Abstract: A device for the pressure reduction of a pressurized medium, wherein the medium is supplied to a consumer or system, which is connected downstream, after a pressure reduction has taken place and the consumer or the system, respectively, encompasses a specified design pressure. Provision is made for two pressure regulators connected in series, as well as for corresponding valves, which serve for the pressure reduction of the pressurized medium. A mobile transport device, which encompasses such a device, is further proposed.

Abstract: Exemplary embodiments of a gas biased pressure regulator comprise a capsule subassembly and a regulator body. The regulator body is adapted to connect to a source of pressurized gas. The capsule subassembly is removably received within the regulator body and includes a capsule body and a piston. The piston is axially slidable between fluid release and fluid seal configurations. When the piston is in its fluid release configuration, an output chamber is placed in fluid communication with the source. When the piston is in its fluid seal configuration, the output chamber is sealed from fluid communication with the source. A pressurizable bias chamber within the capsule body contains a bias pressure urging the piston toward its fluid release configuration. Pressure from the source urges the piston toward its fluid seal configuration. The piston may also have a fluid charge configuration for facilitating the pressurization of the bias chamber.

Abstract: In order to achieve seal durability and bring about a damping action for a piston-type pressure regulating valve, a pressure regulating valve of the present invention is characterized by a valve moving member moving in such a manner as to cause communication or block communication between a primary chamber and a secondary chamber within a case, wherein a plurality of central members are arranged between the case and the valve moving member and the plurality of central members are taken to be different materials. It is then possible to bring about both a damping action and seal durability using the central members by providing central members of different materials.

Abstract: A regulation valve having a valve body with a gas inlet. Housed within the valve body is a rotary regulatory body having a first inlet orifice corresponding to a first minimum flow of a first type of gas and a second inlet orifice corresponding to a second minimum flow of a second type of gas. The first and second inlet orifices are angularly displaced so that when the regulatory body assumes a first angular position within the regulatory body the first inlet orifice faces the gas inlet and so that when the regulatory body assumes a second angular position within the regulatory body the second inlet orifice faces the gas inlet. The regulation valve includes first and second sets of cooperating features that are capable of limiting rotation of the regulatory body to the first and second angular positions, respectively.