Abstract: A valve assembly for an injection valve may comprise a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, the valve needle comprising a ring element extending radially and arranged at an axial end of the valve needle facing away from the fluid outlet portion, and an electro-magnetic actuator unit being designed to actuate the valve needle. The electro-magnetic actuator unit comprises an armature axially movable in the cavity. The armature comprises a recess in which the ring element is located, and a protrusion extending radially into the recess. A spring element is arranged in the recess axially between the ring element and the protrusion of the armature.

Abstract: A spring capture assembly is provided for securing a compression spring of a spring-biased mechanism, such as a spring-biased pressure relief valve, to permit disassembly of the mechanism without risk of damage or injury associate with rapid resiling of the spring from a compressed state. The assembly includes a tool, a housing having an opening for admitting passage of the tool and capturing the spring at one end, a spring retainer, and a compression spring mounted within the housing and captured at one end by said housing and toward an opposite end by the spring retainer. The tool is adapted for mating with the spring retainer and the housing to compress the spring therebetween. The spring capture assembly may be incorporated into a pressure relief valve for venting pressure and/or vacuum from a pressure vessel. Provided also is a method for disassembling a spring-biased mechanism including a spring capture assembly.

Abstract: A module solenoid valve (14) includes a valve body (16) defining an inlet opening (22) and an outlet opening (20). The valve body includes a valve seat (18) at a distal end thereof. A valve member (24) controls flow of fuel through the outlet opening. A movable armature (26) is coupled with the valve member such that movement of the armature moves the valve member between a closed position and an open position. A stator (38) is associated with the armature. An electromagnetic coil (36) is associated with the stator and armature for causing movement of the armature towards the stator. A spring (32) biases the armature and thus the valve member to the closed position. The spring provides a spring force that is greater than a first, normal hydrostatic force applied to the valve seat, but less than a second, overpressure hydrostatic force applied to the valve seat.

Abstract: A channel switching valve is disclosed. The channel switching valve has a stator and a body section each having a connecting surface. The stator and the body section are removably fixed to each other by bolts at their connecting surfaces. Each of the connecting surfaces has a protruding/recessed pattern formed thereon, and the patterns are designed to fit into each other. By rotating the stator and the body section relative to each other, the stroke of a spring is changed between a position where the protruding/recessed patterns of the stator and the body section are fitted into each other and a position where they are not fitted into each other. The spring is held in the body section in its compressed state to urge the rotor toward the stator. An urging force for pressing the rotor against the stator is adjusted by changing the stroke of the spring.

Abstract: A gas pressure regulator comprises a main body having a first, gas inlet pipe and a second, gas outlet pipe, a calibrated gas passage through which gas flows from the first pipe to the second pipe, a shutter housed at least partially in the main body and mobile lengthwise along a first defined line to adjust the opening of the calibrated passage, a device for actuating the shutter and a regulator spring unit opposing the movement of the shutter.

Abstract: The invention relates to a solenoid valve including an electromagnet (17, 4, 3, 10) made of a flat movable core (10), a fixed core (3) and a coil (17), the solenoid valve comprising a body (4) which also belongs to the electromagnet and includes an opening (23) located at the rear of the body (4), opposite the supply opening (18), for inserting the flat movable core (10), the fixed core (3) and the coil (17). The body (4) is secured to a retaining ring (8) made of a non-magnetic material, a flat spring (9) being compressed between the retaining ring (8) and the flat movable core (10).

Abstract: A module solenoid valve (14) includes a valve body (16) defining an inlet opening (22) and an outlet opening (20). The valve body includes a seating surface (18) at a distal end thereof. A valve member (24) controls flow of fuel through the outlet opening. A movable armature (26) is coupled with the valve member such that movement of the armature moves the valve member between a closed position and an open position. A stator (38) is associated with the armature. A first spring (32) biases the armature and thus the valve member to the closed position. A cover (28) is coupled to the stator. A second spring 34 is between the cover and the armature to provide a biasing force on the armature. An electromagnetic coil (36) is associated with the stator and armature for causing movement of the armature towards the stator.

Abstract: There is provided an exhausting device and an energy storage device, including: a housing; a lower valve; an upper valve; a cover; and an elastic member provided between a lower surface of the cover and an upper surface of the opening/closing member to provide a downward pressure to the opening/closing member, and it can appropriately release an increase in an inside pressure due to gas generated inside an energy storage device by the exhausting device, thereby improving reliability of the energy storage device, extending lifespan of the energy storage device, and allowing semi-permanent use of the energy storage device.

Abstract: A valve assembly configured to provide feed-back control of pressurized fluid in a gallery includes a housing and a pressure chamber. The valve assembly also includes a first passage for providing continuous flow of fluid through the gallery and a second passage for supplying the pressurized fluid to the gallery. The valve assembly additionally includes a piston moveable within the pressure chamber between a first position that opens the second passage and a second position that closes the second passage. The piston includes a third passage that provides fluid communication between the first passage and the pressure chamber. Furthermore, the valve assembly includes a spring configured to move the piston to the first position when gallery fluid pressure is less than a threshold pressure value and permit the piston to shift to the second position when gallery fluid pressure is equal to or greater than the threshold pressure value.

Abstract: A proportional control pneumatic cylinder as an air actuator device for a hydraulic pump valve having a valve spool moving in a bore in a valve housing. The device having an actuator housing attachable to the valve housing and having a bore carrying a piston coaxially secured to an end of the valve spool. The device provided with spaced openings in the actuator housing which communicate with the bore therein to introduce air to act on opposite sides of the piston, and factory pretensioned biasing means for normally urging the piston and spool to a center closed position. Surface areas on opposite sides of the piston are approximately equal so that piston movement is approximately proportional to movement of an actuating lever of an air supplying pneumatic control valve over the majority of the range of travel of the actuating lever for both raised and lowered positions.

Abstract: A fail safe retaining plug assembly for a slam-shut safety device includes a reset pin, a retaining plug attached to the reset pin at a proximal portion, and a safety disk attached to the reset pin at a distal portion. The retaining plug assembly is sufficiently long to prevent the safety disk from falling off of the distal portion before the safety disk contacts a valve seat. The retaining plug assembly is also sufficiently long to prevent the retaining plug from falling off of the reset pin before the safety disk contacts the valve seat.

Abstract: A spring cup in an automatic suction and pressure valve has an internal contour which opens in the shape of a calotte so as to reduce wear at the ends of a valve spring positioned in the spring cup and thereby lengthen its useful life.

Abstract: In a valve for controlling a fluid passage, a valve needle is actuated by a first electromagnetic drive having a first armature element and is reset by a return element, and a second electromagnetic drive is provided having a second armature element for actuating the valve needle. The first and second electromagnetic drive are configured in series.

Abstract: The present invention refers to an automatic flow control valve which comprises two water passage stages, and it is installed in electric water-heating appliances, such as showers and taps, the purpose of which is to control the activation of the electrical resistance according to the pressure and water flow of the hydraulic system. More specifically, the present invention refers to a flow control valve comprising a simple and mainly efficient structure constituted of a mobile body (10) provided with a central orifice for the through-passage of water (11), which is disposed on a return component (12) and positioned on the water outlet channel (8) or on another water passage inside the heating appliance.

Abstract: A valve for a floating roof emergency drainage system for draining fluid accumulated atop the floating roof, including a valve body having a top part having a cylindrical bore of first diameter, a bottom part formed by a circumferential wall which extends axially downward from the top part and defines within the wall a cylindrical bore of second diameter that is generally coaxial with and greater than the first diameter, thereby defining at the junction of the top and bottom part bores a downward facing shoulder which serves as a valve seat, the circumferential wall of the bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of the fluid from the valve, a valve seal element axially movable in the bottom part bore between an upper closed position where it abuts the shoulder, and a lower open position spaced axially downward from the upper closed position, and a spring mounted in the bottom part and constantly biasing the valve seal element toward the upper c

Abstract: An electric solenoid valve, methods for operating and/or actuating the solenoid valve, valve system diagnostics, and applications for use are described. The valve may be designed to actuate in a manner so as to control liquid flow into and/or through a device, such as a spray nozzle. By altering the characteristics of the electrical signal transmitted to the solenoid valve, the instantaneous pressure across the valve and duration of fluid flow through the valve can be controlled with a single actuator. Controlled cyclic durations of flow may be implemented to regulate the exact timing of flow through the valve. Alternatively, cyclic durations may occur with a pulse-width modulation technique in which the duty cycle regulates average flow rate through the valve.

Abstract: The device (1) comprises: a body (2, 7) with an inlet (3) and an outlet (4) for the fluid, and with a main valve seat (6) through which the fluid can flow from the inlet (3) to the outlet (4), a main plug (8, 9) associated with this main seat (6), a control chamber (11) partially delimited by the main plug (8); a first passage (8d, 9b, 9c) for communication between the inlet (3) and the control chamber (11); a second passage (12, 13) for putting the control chamber (11) into communication with the outlet (4); and a control solenoid valve (14) including a control solenoid (15) which controls a movable unit (17) comprising a first core (18) which can interact as a movable plug with the second passage (12, 13). The movable unit (17) comprises a second movable ferromagnetic core (21), adjacent to the first core (18). A spacer element (19) extends between the main plug (8, 9) and the second core (21). One or more springs (20, 22) push the second core (21) towards the main plug (8, 9).

Abstract: The invention provides a switching valve having a valve element which is movable in a housing, an actuating apparatus acting on the valve element in a first direction and a spring apparatus charging the valve element in a second direction. According to the invention, the first and second directions are in opposition and the spring apparatus has a progressive spring characteristic.

Abstract: The invention relates to a valve assembly that can be provided of a length to meet conventional fitting dimensions and requirements. The valve assembly includes a valve body housing, at least first and second valve balls. Between the first and second valve balls are provided first and second valve seats. The valve seats are biased towards their respective valve balls by common biasing means. The valve seats, that lie between the valve balls, are typically provided as part of a common valve seat assembly that includes the biasing means.

Abstract: A negative pressure valve assembly is provided. The valve assembly comprises a valve port assembly comprising a port and a flange substantially surrounding the port, a valve comprising a plate adapted to substantially cover the port, the plate comprising a minor edge, a major edge having a major edge length, and a plate biasing assembly stop located at a first position along the major edge, the first position more than 50% of the major edge length as measured from the minor edge. The valve assembly further comprises a hinge coupled to the plate, the hinge adapted to couple the plate to the flange, and first plate biasing assembly adapted to couple to the valve port assembly and to bias the plate towards the valve port assembly, the first plate biasing assembly comprising a resilient member adapted to contact the stop plate.

Abstract: A flow valve that may act as either an excess flow valve or a pressure relief valve has a seat and a valve body for sealing against the seat. The valve body has an integral spring arm for biasing the valve body towards or away from the seat to seal or open a flow of fluid, and a magnet cooperating with the spring arm to position the body relative to the seat to maintain the body in a first position during a normal flow condition and maintain the body in a second position in an abnormal flow condition.

Abstract: An electromagnetic pressure regulating valve has a valve portion for conducting and regulating the pressure of an operating medium, such as oil, a magnet portion for actuating the valve portion for regulating the pressure of the operating medium and having a magnet housing, in which a magnet core is located that as needed exerts magnetic force on an armature, located in the magnet housing, a spring with a spring force generating a pressure activation threshold to be overcome upon regulation and located between the armature and an adjusting ball that is located in a pole piece of the magnet housing, and the spring has regions of different diameter.

Abstract: An electric control valve provided in the present invention has a valve gate and a control actuator including a middle seat (10), a setting part (9), a thermal sensitive element (7), a pushing rod (11) and a memory alloy spring (6), wherein, the thermal sensitive element (7) is disposed within the middle seat (10) and fixed by the setting part (9), with both poles on it being connected with control terminals respectively, the thermal sensitive element (7) is surrounded by the memory alloy spring (6) and the pushing rod (11) located under the memory alloy spring from outside. Through applying operating voltage on the thermal sensitive element within the electric control valve and then swiftly transmitting heat to the memory alloy spring, when the temperature of the memory alloy spring reaches to a deforming temperature, the memory alloy spring deforms and expands and thus pushes the pushing rod to move. A core 4 and a piston are then driven to move by magnetic coupling.

Abstract: Some embodiments include a valve positioned within a test tube to maintain a separation between components of liquid with different densities after centrifugation. The valve preferably includes a cylindrically shaped housing with a conical plug configured to nest within the housing. The plug is not in contact with the housing during centrifugation, but comes into position post-centrifugation.

Abstract: A damping valve arrangement for a vibration damper includes a damping valve body, which has at least one through-flow opening for the damping medium, and at least one valve disk which at least partly covers the through-flow openings under the influence of a closing force. The damping valve arrangement includes at least one spring element which has at least one supporting portion axially supported at another structural component part of the damping valve arrangement, and at least one spring portion disposed at a distance from the supporting portion and which introduces a spring force into the valve disk at least indirectly, wherein the spring force of the spring element is directed counter to the closing force acting on the valve disk, and wherein the spring force of the spring element is less than the closing force of the valve disk.

Abstract: Oxide film formed on a spring-retaining flange by heat treatment gets unlikely to peel off, thereby improving wear resistance of a contact surface of the spring-retaining flange with a valve spring. The oxide film 15 of the part of the spring-retaining flange 3 with the valve spring 7 is at least partially removed to make thickness of the oxide film to 0.00 to 0.02 ?m.

Abstract: A differential pressure control valve has a valve seat made of magnetic material, a valve body having a lid made of magnetic material, and a guiding member. Fluid passes through a valve hole formed in the seat. The body on the downstream side of the seat separates from or is seated on the seat in accordance with the pressure difference between the upstream and downstream sides to selectively open and close the hole. The guiding member fixed to the seat guides the body. The lid is seated on the seat to close the hole. A guided member is made of nonmagnetic material. One of the seat and the lid has a permanent magnet. The body is urged in the direction approaching the seat by the force of the magnet located at a position outside the area where the body is seated on the seat.

Abstract: The invention is an improved valve having a valve body, a valve stem having a valve plug portion and a valve stem portion, and a valve guide having an aperture in which the valve stem portion is received for reciprocal movement of the valve stem longitudinally inside the valve body. A valve seat is supported in the valve body and includes a pair of spaced apart circular valve seat surfaces that each sealingly engage a separate surface of the valve plug portion;. A spring biases the valve plug portion into sealing engagement with the valve seat. The valve seat has a pair of sealing surfaces that are brought in sealing engagement with distinct surface portions of the valve stem to provide improved and redundant sealing function. The valve has improved longevity and reliability.

Abstract: Fuel injection apparatus comprising a solenoid coil (40); an armature (41) coupled with a valve element (34) operable to open and close a fuel valve (32) when the solenoid coil (40) is selectively energized and de-energised. The valve element (34) is biased to the closed position by a biasing device (42). Magnetic force from the energized solenoid coil moves the armature (41) and valve element (34) to open the valve to an opening position to deliver fuel reached when a controller (170) calculates opening forces balance closing forces. Such opening position control is used to control fuel flow rate to a gas fuelled engine (20) and/or reduce noise vibration harshness in varied engine types. Balance of forces control, on closing of the valve, reduces or avoids impact of the valve element (34) with a physical stop (106), thus reducing engine noise, and can be used in fuel metering.

Abstract: An on-off valve that can operate between an open position and a closed position. The on-off valve has a valve body with a cylindrical valve cavity, an inlet, an outlet, and in an open position the inlet is in communication with the outlet. A cylindrical valve cartridge is sealably mounted within a chamber of the valve cavity and has a central cavity facing the valve cavity and a bore forming communication with an atmosphere external to the valve cartridge. A pin extension is movably mounted within the bore. A pin bushing and a pin seal are mounted within the central cavity, and an actuating pin is movably mounted at least partially within the central cavity. A valve poppet is slidably mounted within the valve cavity. In a closed position a first end portion of the valve poppet closes the first outlet, and in an open position the first end portion opens the first outlet. A bias element is mounted to exert a bias force to and urge the valve poppet against the valve cartridge.

Abstract: A valve includes a housing and a valve seat and a structure fixedly disposed remote from the valve seat, a valve head to open and close the valve seat, fluid being permitted to flow when the valve seat is open and an elastic system anchored on the structure and coupled to the valve head, the elastic system including a biasing element and an elastic element formed of memory metal alloy disposed to contact fluid permitted to flow, the biasing element and the elastic element being configured to cooperatively move the valve head toward a valve seat open position when a fluid temperature is below a lower limit, and the biasing element and the elastic element being further configured to cooperatively move the valve head toward a valve seat closed position in opposition to the biasing element when the fluid temperature is above an upper limit.

Abstract: A shutoff valve includes a valve housing with inlet and outlet openings and a hole drilled in alignment with the inlet (or outlet) opening. A pusher is slidably positioned in the hole for extension toward the inlet opening, the pusher including a shutoff member inside the hollow housing adapted to close off the inlet opening when extended to a inlet-closed position, and to open the inlet opening when retracted to an inlet-opened position. The pusher includes a handle for manually pressing the pusher and shutoff member toward the inlet opening. A spring biases the pusher toward the inlet-opened position. By this arrangement, the pusher is manually closed but cannot accidentally be left in the inlet-closed position due to being biased toward the inlet-opened position.

Abstract: The invention relates to a shutter actuator including a translatably guided carriage (10) rigidly connected to the shaft (4) in the housing (3), and comprises: a rack (11) that meshes with the cog (20) of the outlet shaft (4) linked to the flap (2-1) of the shutter (2); a bearing (13) for a triggering spring (70); a bearing member (12) for a cocking member (30) that drives the carriage (10); and a locking notch (14-1) for receiving a locking member (42) supported by a locking arm (40).

Abstract: Apparatus to bias valve closure members are described. An example valve includes a valve body having an opening defining a passageway. The opening has an axis that is substantially coaxially aligned with a flow path axis defined by the passageway. A first shaft supports a closure member within the passageway of the valve body and relative to the opening and an end cap removably coupled to the valve body retains the shaft within a bore of the valve body. A spring is disposed between the first seating surface and a second seating surface opposite the first seating surface to provide a force to oppose the weight of the closure member and facilitate alignment of the closure member relative to the opening of the passageway.

Abstract: An anti-drip valve assembly for a fluid dispenser is disclosed that includes a valve block and a cylindrical valve body disposed within the valve block. The cylindrical valve body includes a recess for accommodating a valve element. The recess is in communication with the chamber for accommodating a biasing element for biasing the valve element outward and away from the valve body or towards the valve block or dispense port, depending upon the position of the valve body. When the valve body is in a closed position, the valve element is biased against the dispense port. When the valve body is in a dispense position, and there may be a plurality of dispense positions, the dispense port is selectively in communication with a fluid passageway or one of a plurality of fluid passageways for dispensing fluid through the dispense port. The valve assembly is particularly useful for fluid dispensers employing more than one pump for dispensing a common fluid in different amounts.

Abstract: The present invention discloses a pressure control valve comprising: a cylindrical valve body which has a bottom wall and a side wall, wherein the bottom wall is provided thereon with an air inlet communicating with a device whose pressure to be limited, the side wall is provided with at least one guiding pin, and the cylindrical valve body has air outlets communicating with an exhausting system; a valve core, which is provided within the cylindrical valve body and in air-tight cooperation with the air inlet; a traveling guiding bar, having a lower end connected to the valve core; a covering fitted rotatablely or up-and-down movably over the cylindrical valve body, for driving the traveling guiding bar to rotate or move up-and-down; a spiral guiding member, which is fitted up-and-down movably over the traveling guiding bar and is provided on its outer surface with spiral grooves into which the at least one guiding pin can be inserted; a pressure spring, having one end pressed against the valve core and the ot

Abstract: Check valve includes a housing, a bore, and a movable valve body, which is spring-loaded and rests with a sealing action on a valve seat, where the bore is designed as a stepped bore, where the bore with the smaller diameter has the valve seat, and where the bore with the larger diameter holds the movable valve element. The valve body is designed as a ball, which is guided in the bore by at least two guide ribs, and a retaining element in the terminal area of the bore captures the ball and simultaneously spring-loads it.

Abstract: This invention relates to a shut-off valve, and primarily to a valve for shutting-off the flow of a fluid such as a mains water supply to commercial premises or a domestic dwelling. The shut-off valve (10) comprises a diaphragm valve and a pilot valve (30). The diaphragm valve has an inlet (14) and an outlet (16), a valve member (26) and a valve seat (22), the valve member having a closed position in which it engages the seat and prevents the flow of fluid from the inlet to the outlet, and an open position in which the valve member does not engage the seat and fluid can flow from the inlet to the outlet. A first fluid conduit (36) connects the inlet of the diaphragm valve to the inlet of the pilot valve, and a second fluid conduit (40) connects the outlet of the pilot valve to the outlet of the diaphragm valve.

Abstract: A constant-residual-pressure valve is disposed in a communication passage connecting a high-pressure fuel passage through which pressurized fuel flows with a low-pressure fuel passage through which the fuel flows toward a high-pressure pump. The constant-residual-pressure valve includes a valve body, a spring, and a spring stopper. The valve body can sit on a valve seat formed in an inner passage. The spring biases the valve body toward the valve seat. The spring stopper has a downstream-orifice of which flow passage area is smaller than that of a passage upstream of the valve seat. Thereby, cavitation between the valve body and the valve seat is less generated.

Abstract: A valve that includes a housing defining first and second bores having a central axis, and a peripheral valve seat. An actuator is located in the first bore and has a reciprocating seal disposed for movement along the central axis for engaging the valve seat and closing the valve. A coiled return spring is mounted in the housing for urging the reciprocating seal towards the chamber to open the valve, the return spring having a first end connected to the reciprocating seal and a second end engaging a spring support in the housing facing the first bore. The return spring may have a larger diameter at its second end than its first end. The housing may include a third bore in communication with the second bore and having a different cross-sectional area than the second bore. The return spring could be supported by a discrete spring support located in one of the bores.

Abstract: The present invention relates to an aperture-shaped variable valve which is attached to the inside or end of a pipe to variably control the flow rate or pressure of fluid, such as liquid or gas, flowing along the pipe. As to one usage of the invention, the exhaust noise of an automobile can be controlled because back pressure is variably controlled by the valve attached to a vehicular exhaust system where the flow rate of exhaust gas varies according to the RPM of an engine. Additionally, the flow rate can be measured within a large range through application of the valve to a flowmeter. An operational principle of the valve is to control the cross section of the flow path by contract or release of aperture plates which are initially opened at a constant size by elasticity of a spring. Using the aperture-shaped variable valve, linear control of flow rate or pressure is facilitated, compared with a conventional disc variable valve.

Abstract: A spring seat for use with actuators is described herein. An example spring seat includes a body having a shoulder to receive an end of an actuator spring, a guide projecting away from the shoulder toward a first surface of the body, wherein the guide is configured to fit within an inner diameter of the coil spring to retain the end coil spring in engagement with the shoulder, and an aperture in a surface of the body opposite the guide, wherein the aperture is configured to receive an end of an adjuster of the pneumatic actuator such the aperture engages the adjuster to substantially reduce tilting of the body and buckling of the spring.

Abstract: A residual pressure holding valve (1) for a hydropneumatic suspension strut (2) of a motor vehicle has a valve housing (3) with an air inlet (4) and an air outlet (5). A valve body (6) is arranged displaceably in the valve housing (3) and a valve element (7) is arranged displaceably in the valve body (6). Air pressure applied to the air inlet (4) can lift the valve body (6) off a valve body seat (8) of the valve housing (3) to allow air to flow past the valve body (6) to the air outlet (5). Air pressure applied to the air outlet (5) can lift the valve element (7) off a valve element seat (9) of the valve body (6) to allow air to flow past the valve element (7) to the air inlet (4).

Abstract: Actuator (1) for a seat valve or a butterfly valve which is of the type that is normally closed (NC) or normally open (NO), and also contains a cylinder (3) and a piston being held in the normal position by a spring. The spring virtually consists of a closed space with a pressurised fluid, and the actuator further consists of at least a top unit (7), with two or more connections (12, 13) for a pressurised fluid. The actuator is with one of the connections in the top unit that further is connected to the inside of the cylinder through one or more openings at one end of the cylinder and another connection is connected to the inside of the cylinder through one or more openings at the other end of the cylinder. The top unit is with a design allowing the connections to be interchanged by changing the position of the top unit, e.g. by turning the top unit 180 degrees around an axis corresponding to or parallel to the axis of the piston and cylinder.

Abstract: A bushing for positioning between a first component and a second component is disclosed. The bushing comprises a conical body that includes a first edge, a second edge, and at least one slot extending from the first edge toward the second edge. The slot or slots facilitate the flexing of the conical body. Methods for making a conical bushing are also disclosed.

Abstract: A solenoid valve that is constructed as follows: a cap is mounted on a movable iron core such that forward movement thereof is restricted; a pressing member is displaceably arranged between abutting seat surfaces of the cap and the movable iron core; biasing forces F1, F2, and F3 of an iron core return spring for biasing the movable iron core toward a initial position, a cushioning spring provided between the movable iron core and the pressing member, and a valve return spring for biasing a valve member in a direction to open a valve are set so as to be F1>F2>F3; and gaps x and y are provided between the pressing member and the movable iron core and between the pressing member and the cap, respectively, when the movable iron core is at the initial position.

Abstract: Embodiments of a method of operating a safety valve and a safety valve system are provided. The valve system includes a valve, an actuator, a mechanical override, and an indicator. The actuator includes a fail-safe mechanism and the indicator is configured to indicate whether the fail-safe mechanism is operable during use of at least one of the actuator and the mechanical override. In one embodiment, a method of operating the safety valve includes actuating the valve into an open position and sending a signal to indicate that the fail-safe mechanism is operable to move the valve to the closed position, while the valve is in the open position.

Abstract: A port is formed in a cylinder head of an engine. The port is opened and closed by a valve. A valve spring device is provided with a first spring and a second spring. The second spring is contained in a housing and held by a stopper in a manner such that it is compressed along an axis or subjected to a preload. The preload of the second spring is larger than an installation load of the first spring. An axial load acts on the springs. The valve spring device has load-deflection characteristics such that only the first spring deforms axially when the axial load is not larger than a predetermined value and that both the first and second springs deform axially when the axial is load exceeds the predetermined value.

Abstract: Disclosed is a solenoid valve having a magnet unit and a valve cartridge having a capsule, an armature guided longitudinally in the capsule and connected to a sealing pin guided longitudinally inside a valve insert, and a valve body with a sealing seat; a magnetic force generated by the magnet unit moves the armature together with the sealing pin from an initial position toward the valve body counter to the force of a return spring, causing the sealing pin to move into and close the sealing seat in an end position, where the initial position represents a maximum volumetric flow between a valve inlet and a valve outlet. A spring support is embodied and situated so that the return spring is supported outside the volumetric flow and presses the armature into the initial position against the capsule, and the inlet and outlet are embodied and situated so that the direction of the volumetric flow assists the closing motion of the armature with the sealing pin.

Abstract: A valve of a heating, ventilation and/or air conditioning system includes an actuator with a housing and a shaft which is arranged at least partially in the housing and which can be coupled directly or indirectly to the valve such that the valve can be adjusted during a rotation of the shaft. A hand-operated element can be coupled to the shaft via an overload clutch arranged between the hand-operated element and the shaft which limits a torque which is transmitted onto the shaft by the hand-operated element to a predetermined maximum value. The overload clutch has a coupling element and a replaceable spring element which presses the coupling element against the shaft such that the maximum value for the transmittable torque is dependent on the replaceable spring element.