Abstract: A two-port valve includes a valve part configured to open and close a valve seat in a liquid flow path connecting a first port and a second port by a valve member and a pilot-type valve driving mechanism to open and close the valve member through a rod. The rod passes through an insertion hole of a plate facing on the liquid flow path in a sealed state. The valve member is provided to the tip part of the rod and also a cap which abuts against the periphery of the insertion hole of the plate when the valve member opens the valve seat and prevents intrusion of foreign material in the liquid into the insertion hole is provided to the rod.

Abstract: An idle air control valve for a vehicle includes a housing (21), a motor (32) disposed in the housing, a shaft (29) associated with the motor, and a bellows assembly (30) including a bellows structure (10) having a first end defining a base (14), a second, opened end (16), and a bellows (18) between the first and second ends. An annular rim member (28) is associated with the second opened end. A pintle (24) has surfaces defining an annular groove (26) therein. The annular rim member (28) is received, in press-fit engagement, in the annular groove (26). The base (14) is in press-fit engagement with a recess (22) in the housing and the pintle (24) is coupled with an end of the shaft, such that the bellows structure together with the pintle surround the shaft and provide a barrier substantially preventing contaminants from entering the motor.

Abstract: A pendulum gate valve includes a housing defining a valve chamber, the valve housing having a vacuum-chamber opening in a front wall and an access opening in a rear wall aligned with the vacuum-chamber opening and defining a through-hole extending from one side of the valve housing to the other side for providing access to the vacuum chamber, a carriage assembly pivotally mounted within the valve housing and moveable between a open position remote from the openings and a closed position between the openings, a valve plate reciprocally mounted on one side of the carriage assembly and movable between an unsealed position spaced from the vacuum-chamber opening and a sealed position sealing the vacuum-chamber opening, a valve-plate actuator carried on the carriage assembly for moving the valve gate between the unsealed and sealed positions, a retractable support reciprocally mounted on another side of the carriage assembly movable between a retracted position spaced from the access opening and an extended positio

Abstract: A deadweight pressure standard provides improved measurement accuracy and repeatability. The standard includes a flow regulator having a first valve controlled by a first pair of non-hysteresis sylphons, and a supply regulator having a second valve controlled by a second pair of non-hysteresis sylphons. The first and second valves achieve an equilibrium state between the supply regulator and the flow regulator. The second valve regulates pressure generated by an applied pressure supply. A mass-to-pressure transducer transforms an applied gravitational force into a reference pressure regulated by the first valve. The center of pressure force on the first pair of non-hysteresis sylphons, and the center of pressure force on the first valve, are exerted along a first reference axis. The center of pressure force on the second pair of non-hysteresis sylphons, and the center of pressure force on the second valve, are exerted along a second reference axis.

Abstract: Disclosed is a travel-transmitting element for an injection valve, comprising a pressure-loaded storage chamber which is filled with a hydraulic fluid and a storage element that is provided with an elastomeric bellows-type member. In order to ensure sufficient steadiness of the rotational speed over the service life, the inventive elastomeric bellows-type member is provided with a stiffening element which ensures constant radial stiffness over the service life at least in some sections thereof.

Abstract: A gate valve assembly provides vacuum isolation between a first treatment system and a second treatment system. The gate valve assembly includes an actuator rotatably coupled to at least one of the first treatment system and the second treatment system, and configured to operate an actuator assembly that has an actuator arm slidably coupled to the actuator. The actuator arm has a distal end coupled to an isolation gate through a vacuum feed-through, wherein the vacuum feed-through is configured to preserve vacuum with the first treatment system and the second treatment system. The isolation gate is configured to rotate about the gate hinge when the actuator arm is translated, and to close a transfer slot between the first treatment system and the second treatment system, or open the transfer slot between the first treatment system and the second treatment system.

Abstract: A fuel injector for fuel-injection systems of internal combustion engines having a piezoelectric or magnetostrictive actuator, includes a hydraulic coupler which actuates a valve-closure member (3) formed on a valve needle. The valve-closure member cooperates with a valve-seat surface to form a valve-sealing seat. The coupler includes a master piston and a slave piston which are guided in bores of a guide sleeve. Located between the master piston and the slave piston is a pressure chamber filled with a hydraulic fluid. A corrugated tube is positioned around the guide sleeve which is sealingly joined to the master piston at one end and to the slave piston at the other end, and which seals a supply chamber for the hydraulic fluid from a surrounding fuel chamber.

Abstract: A fluid dosing device for a pressurized liquid is disclosed, which comprises a chamber (35) which is supplied with pressurized liquid by means of a liquid supply line (17, 19); a valve needle (9) which is guided through the chamber (35), the first end section of said valve needle being able to be lifted and the second end section thereof forming a valve in conjunction with a valve seat disposed on the housing (3). Metal bellows (33) are provided as a leadthrough element for the first end section of the valve needle (9). The metal bellows seal the chamber in said region in a tight manner. A throttle point (37, 39) is provided between the valve needle (9) and the inner wall of the chamber between the metal bellows (33) and the mouth (18) of the liquid supply line (17) leading into the chamber.

Abstract: A vacuum regulating valve is capable of precisely controlling the flow of a fluid so that the flow rate may increase gradually in an initial stage of a valve opening operation. The vacuum regulating valve includes a valve casing having a valve chamber and provided with a first opening connected to a vacuum vessel and a second opening connected to a vacuum pump, a valve seat, a valve element seated on the valve seat, a valve stem connected to the valve element, a bellows sealing the valve stem therein, and a baffle member attached to the back surface of the valve element and surrounding the bellows. The baffle member is formed in an axial length such that the baffle member is able to cover the second opening entirely when the valve element is seated on the valve seat.

Abstract: The valve comprises a mobile needle having a movement in the valve body which is controlled by an amplified piezoelectric actuator. A bellows, surrounding an intermediate zone of the needle, is integral at a first end with the valve body and at a second end with the needle so as to isolate the actuator from the pressure chamber. At least one flexible guide blade of the needle is fixed on the one hand to the valve body and on the other hand to the needle. This flexible guiding enables any part sliding with respect to another part, liable to generate wear or contaminating particles, to be avoided, except for the seat and needle.

Abstract: In a conventional relief valve having a valve element supported by a diaphragm, since a surface of the valve element exposed to pressure is large and an opening/closing operation of the valve element is rapidly conducted, the operation often leads to chattering and is therefore poor in stability. A relief valve of the invention is free from chattering and capable of smoothly performing the opening/closing operation of its valve element (7). The element (7) is adapted to open and close a fluid passage and disposed between: an inlet port (2) in direct communication with an upstream-side fluid passage (1); and, an outlet port (4) in direct communication with a downstream-side fluid passage (3), and is provided with a flange (8) in its upper portion. Mounted on the flange (8) is a sleeve-like bellows (6) for supporting the valve element (7).

Abstract: A valve assembly has a valve body and a fluid passage through the valve body with an inlet end and an outlet end. A valve seat is defined within the fluid passage. A sleeve is axially slidable within the fluid passage and has an upstream end, a downstream end, and an axial flow passage in communication with the inlet end and the outlet end of the fluid passage. A valve stem is pivotally mounted at a stem pivot spaced radially from the fluid passage. The valve stem is actuable to slide the sleeve between an open position with the downstream end spaced from the valve seat and a closed position with the downstream end borne against the valve seat to selectively control fluid flow through the flow passage to the outlet end.

Abstract: To prevent the entry of ambient air and liquid such as rainwater into a direct acting type auto-by starter and thereby prevent the formation of rust in the auto-by starter, by adjusting pressure fluctuations in the auto-by starter caused by the operation of a starting valve for opening and closing a starting intake passage. A starting valve is lifted to open a starting intake passage to start an internal combustion engine. Pressure in a sliding space for the starting valve is increased, so that the gas in the sliding space flows out. The flow of the gas is absorbed by an increase in volume inside a bellows boot mounted on an upper portion of the starting valve. When the starting valve is lowered by the operation of a spring member, the pressure in the sliding space is reduced to allow the gas flow from the bellows boot into the sliding space.

Abstract: The present invention is an intrinsically safe pneumatically actuated flow controller. A preferred embodiment for the flow controller has a housing assembly defining an inlet port, an outlet port, a pressure signal inlet port, and a main flow path extending between the inlet port and the outlet port. A restriction member is arranged in the main flow path. A first valve assembly and second valve assembly control fluid flow along the main flow path. A first regulator assembly operates the first valve assembly. A pressure signal actuation assembly has an actuation bellows attached to an actuation piston mounted on a flow control piston rod that passes through an isolation plate and is sheathed by an isolation bellows. The flow control piston rod terminates in a flow control piston that engages a second regulator assembly, which operates the second valve assembly based on pressure signals transmitted through the pressure signal inlet to the pressure signal actuation assembly.

Abstract: A cylindrical heat-generating member is disposed in a valve casing including a valve seat in a flow path connecting main ports, a valve member for opening and closing the valve seat, and a rod connecting the valve member and a piston. A first heater is mounted in the heat-generating member. The heat-generating member and a heat receiving member of the valve member are connected to each other by a heat-transfer member for expansion and contraction. As a result, the valve member is constantly heated through the heat-transfer member irrespective of its open/closed position. When the valve member is open, the heat receiving member comes in contact with the heat-generating member and the valve member is directly heated.

Abstract: To constitute a poppet valve with a heater by providing a heater which heats a valve member at a fixed position inside valve casing without attaching the heater to the valve member, a rod or the like which is a movable member as necessary. In a valve casing 1 having main ports 11, 12, a flow path 13 which connects these main ports 11, 12, a valve seat 14 which is provided inside the flow path 13, a valve member 17 which opens/closes the valve seat 14, and a rod 18 which is coupled to the valve member 17, a cylindrical heat transfer body 28 is disposed at a fixed position therein so as to surround the rod 18, and the heat transfer body 28 is caused to house a first heater 31 therein, so that a poppet valve is constituted such that the valve member 17 comes in contact with the heat transfer body 28 at a time of opening of the valve member 17.

Abstract: A fuel injection valve, especially an injection valve for fuel injection systems of internal combustion engines, includes a piezoelectric or magnetostrictive actuator and a valve-closure member, which can be actuated by an actuator via a valve needle and interacts with a valve-seat surface to form a sealing seat. An intermediate piece is connected via a first flexible seal to a support plate; the support plate is connected via a second flexible seal to a driver at the valve needle; and the driver is connected via a third flexible seal to the intermediate piece, thereby creating a sealed hydraulic translation device.

Abstract: A heater and a temperature sensor are mounted to a valve member driven for opening and closing through a piston and a rod, primary conductors extending from the heater and the temperature sensor are connected to a terminal block mounted to the piston, a secondary conductor having a spiral portion for expansion and contraction is connected between the terminal block and a connector mounted to a lid body, and displacements of the primary conductors due to opening and closing of the valve member are absorbed by expansion and contraction of the spiral portion.

Abstract: The invention concerns a safety valve comprising a body (2) traversed by an actuating rod (1) in translation relative to the body (2), wherein the rod passes through a bellows (3) comprising two metal walls, the bellows being fixed at each of its ends to the body and to the rod, respectively. The invention also concerns a fluid tank whereon is mounted such a valve.

Abstract: A valve assembly for creating a seal between a valve stem and a valve housing includes a valve housing having a first end wall, a second end, and a peripheral wall extending between the first and second ends walls such that a lumen is defined. Each of the first and second ends has an opening extending therethrough and into the lumen. A valve stem has a first end extending through the peripheral wall and toward the opening in the first end wall. A plate is attached to the first end of the stem. The plate is positionable over the opening in the first end wall. A sleeve is positioned in the housing and extends over the stem. The sleeve is positioned in the housing and extends over the stem. The sleeve is attached to the peripheral wall and the plate such that the sleeve is closed off from the lumen.

Abstract: Anti-pumping dispense valves, constructed according to principles of this invention, comprise a fluid transport housing having a fluid inlet passage extending into the housing, a fluid outlet passage extending out of the housing, and a fluid transport chamber disposed within the housing. The fluid transport chamber includes an valve seat. An actuator housing is attached to the fluid transport housing and includes an actuator chamber that is in contact with the fluid transport chambers. A diaphragm/poppet assembly is disposed within the fluid transport chamber and comprises a poppet positioned downstream of the seat for placement against the seat to stop fluid flow through the first fluid transport chamber. An actuator is disposed within the actuator chamber for moving the diaphragm/poppet assembly.

Abstract: A vacuum valve comprising valve housing (1), a continuous line (3) in the valve housing (1) the conductance of which is to be set; a movably supported valve body (5) extending into the line (3) and having a position (H) which defines a conductance through line (3). A setting device (11) is connected to the valve body (5) and having a setting displacement. Locally offset snap-in devices (22; 29, 30) along this setting displacement and effective for snap receiving the setting device (11) for setting displacement positions, the snapping-in at each of the snap-in devices (22; 29, 30) being releasable again by increasing a driving force acting on the setting device (11).

Abstract: To allow the whole outer peripheral face of a casing of a poppet valve to be heated efficiently using an inexpensive rod-like heater. A heat transfer cover 30 formed of heat transfer material is provided in a covering manner on an outer peripheral face of a valve casing 10 comprising main ports 11, 12, a flow path 14 connecting these main ports 11, 12, an annular valve seat 15 provided in the flow path 14, a valve member 13 of a poppet type opening/closing the valve seat 15 and a rod 16 coupled to the valve member 13 so as to surround the whole periphery of the valve casing 10, and a rod-like first heater 32 is attached in a heater hole 31 provided in the heat transfer cover 30.

Abstract: A gate valve according to the present invention including a first valve plate having a valve opening and a second valve plate connected to the first valve plate via a first bellows, in which the rigidity and the like of the valve plates, a valve rod, and the like can be reduced as compared to that in a conventional art by canceling the differential pressure.

Abstract: A gate valve according to the present invention including a first valve plate having a valve opening, a second valve plate connected to the first valve plate via first bellows, and an actuator provided between the first valve plate and the second valve plate, wherein the first valve plate is moved by the operation of the actuator, thereby enabling the valve plate, a valve rod, and the like to be made small and lightweight.

Abstract: A linear motion leadthrough for a rod which has a first end, a second end and an outer surface and whose first end projects into a vacuum area of a vacuum installation while its second end is located outside of the vacuum area, comprises: a bushing which has an inner wall and through which the rod extends and which is displaceable linearly relative to the rod, at least one elastomer sealing ring for sealing the rod relative to the bushing which is secured to the inner wall of the bushing or to the outer surface of the rod, wherein the sealing ring is lubricated by a lubricant, and a bellows which is arranged inside the vacuum area, has a first end and a second end, encloses a portion of the rod located inside the vacuum area and delimits a space located between the rod and the bellows from a space lying outside the bellows, and whose first end is fastened to the rod and whose second end is fastened to the bushing or to a part enclosing the bushing, wherein at least one opening is provided which connects the s

Abstract: A linear motion leadthrough for a rod (2) which has a first end (7), a second end (8) and an outer surface (27) and whose first end (7) projects into a vacuum area (6) of a vacuum installation while its second end (8) is located outside of the vacuum area, comprises:

Abstract: A valve assembly including a body having an inlet port, an outlet port, and a valve seat having a passageway. An electrical solenoid assembly moves a valve member upon being energized to control fluid flow between the inlet and the outlet ports. The valve assembly also includes a fluid-tight bellows positioned to apply a force to the valve member, and a pressure balancing passageway connects the inlet port to the bellows. The valve assembly further includes a housing received over the solenoid assembly and having a flange received against the valve body. A seal is positioned between the flange of the housing and the valve body, and a collar is secured in a continuous manner to the valve body over the housing flange, thereby securing the housing to the valve body and applying a sealing force to the seal in a substantially even manner.

Abstract: In a vacuum valve including a main flow path and an auxiliary flow path for connecting a chamber port and a pump port in parallel, a main valve body for opening and closing a main valve seat in the main flow path, and an auxiliary valve body for opening and closing an auxiliary valve seat in the auxiliary flow path, the main valve body includes, in addition to a valve sealing member for opening and closing the main valve seat in a poppet manner, a flow rate adjusting portion in a gradually-tapered shape to be fitted in an inner hole of the main valve seat and the flow rate adjusting portion functions to gradually increase an exhaust flow rate when the main valve body opens after opening of the auxiliary valve body.

Abstract: A smooth exhaust valve includes a main flow path having a large cross-sectional area and an auxiliary flow path having a small cross-sectional area for connecting a first port and a second port in parallel, a main valve body for opening and closing the main flow path, an auxiliary valve body for opening and closing the auxiliary flow path, a first piston for opening and closing the main valve body, a second piston for opening and closing the auxiliary valve body, a first spring device for repulsing the main valve body in a valve-closing direction, a second spring device for repulsing the auxiliary valve body in a valve-closing direction, and an adjusting rod mounted to a valve casing so as to be operated from outside to move forward and rearward and for changing a compressed amount of the second spring device by operation of forward and rearward movements of the adjusting rod to adjust a repulsing force of the second spring device.

Abstract: A pneumatic valve includes a cylinder having at least one gas port for providing inflow and outflow of a gas; a piston arranged in the cylinder and performing a reciprocating, straight-line movement in response to the inflow and outflow of the gas; a first valve shaft passing through the piston and having a first end portion including a first coupling portion; and a second valve shaft including a second coupling portion and having a first end portion protruding from the cylinder, wherein the second coupling portion is coupled to the first coupling portion.

Abstract: The present invention relates to a valve for controlling fluids, which has a piezoelectric actuator (2) that is disposed in an actuator bore (3). A hydraulic booster (11) and a bellows (5) are also provided. The bellows (5) is embodied such that it can absorb the axial stroke of the piezoelectric actuator (2). The bellows (5) is connected solidly to the piezoelectric actuator (2) and is also connected solidly to the actuator bore (3). This assures a fluid-tight seal of the actuator module relative to the other regions of the valve.

Abstract: An actuator for controlling the pressure of fluid, such as water or steam, from a fluid source to a flow controlling orifice. The actuator can be used to apply such fluids to the web of a papermaking machine. The actuator comprises a housing having a first inlet connectable to the fluid source and a second inlet connectable to a pressure source. A resilient bellows structure extends between the first and second inlets within the housing to define an internal region of the bellows structure in sealed communication with one of the first and second inlets and an external region of the bellows structure in sealed communication with the other inlet. The bellows structure expands or contracts within the housing depending on the difference in pressures between the internal and external regions of the bellows.

Abstract: In a vacuum exhaust valve in which a valve seat in a flow path connecting a chamber port and a pump port is opened and closed by a valve body, a flow rate adjusting portion in a gradually-tapered shape to be fitted in an inner hole of the valve seat is provided to the valve body in addition to a valve sealing member for opening and closing the valve seat in a poppet manner and the flow rate adjusting portion functions to gradually increase an exhaust flow rate when the valve body opens.

Abstract: A gate valve assembly, which may be used to seal a semiconductor processing chamber to isolate the chamber and/or maintain pressure or vacuum therein. The invention includes a gate coupled to a linear axial shaft. The axial shaft is driven using a single action actuator. The gate of the present invention has an inclined surface to the shaft. Because the surface is inclined, the gate can be forced by the movement of the axial shaft against a similarly inclined gate seat surface. The angled surface translates the axial sealing force provided by the axial shaft into a positive lateral sealing force without the need for lateral movement of the gate.

Abstract: A fluid metering device that employs a sealing element for delivering a metered dose of a pressurized fluid. The sealing element includes a metal bellows sealing element or metal bellows that attaches to a valve needle and a housing. The metal bellows includes a number of corrugated elements for sealingly guiding said valve needle as the valve needle moves to deliver the metered dose of pressurized fluid.

Abstract: The invention relates to a bellows to seal a valve rod passage in a lifting valve, specifically formed as an expansion bellows or corrugated tube, which ensures a reliable, hygienically proper and durable static sealing of the connecting flange of a closing-member unit in the box of the lifting valve under the occurring forces at an adequately long service life.

Abstract: An extended stem globe valve for use with cryogenic fluids, wherein the elongated shaft between the valve seal or disk and the actuator is constructed so that rotational movement of the actuator results in linear movement of the shaft, without imparting a large rotational movement of the shaft about its longitudinal axis and with reduced thermal conduction between the mating parts. Coupling of the valve disk to a valve disk retainer is effected in the area above the valve seat. The valve also includes a shaft insulator so constructed and arranged to retain leakage fluid in a volume space closer to the valve seat. Optionally the valve can include bellows sealing of the shaft to prevent fluid from contacting the uppermost portion of the shaft.

Abstract: In a hose coupling with a coupling sleeve and a coupling nipple and a valve insert (9) provided therein, the valve spring, the holding element and the valve seat of the valve insert are designed as a one-piece component, and the valve spring (11) has a cavity (21) which is closeable.

Abstract: A liquid valve particularly suited for dispensing of glue at high repetition rate has a solenoid-retracted pin that normally engages a valve seat to close the valve. Glue under pressure enters the chamber in which the pin operates, close to the valve seat. To seal against the flow of pressurized glue up along the pin toward the solenoid, and also to exert a light valve closing force on the pin, a thin metal bellows member is sealed and fixed to the pin near its lower end, at one end of the bellows, and to a connector within which the pin slides, at an opposite, upper end of the bellows. The geometry of the valve seat and the valve closure end of the pin is such that only a very slight retraction of the valve pin opens the valve sufficiently to deliver glue at full velocity through the valve orifice. The valve is capable of accurate glue dispensing through a wide range of operating pressure.

Abstract: A bellows-type pressure responsive valve comprising bellows 66 of a closed structure as a pressure sensing element adapted to vary an opening amount of the valve by transmitting expansions and contractions of the bellows 66 to a valve body 61 by means of a valve rod 65 which is supported on a valve housing 51 so as to move in a valve lifting direction, characterized in that the bellows 66 and the valve rod 65 are spherically connected by means of a spherical coupling structure which is incorporated at a connecting portion of the bellows 66 and the valve rod 65 and composed of a ball 77 which is rotatably disposed coaxially with the valve rod 65, and a spherical recess 78 which is formed at a closed end face 67a of a bellows body 67 of the bellows 66 at a central position thereof. With this structure, centripetal motions of the bellows and the valve rod are automatically effected by means of the spherical coupling between the bellows and the valve rod.

Abstract: The present invention provides an interchangeable modular valve-actuator combination whereby the valve stem on the valve and the actuators are configured to be interchangeably engageable. The components of the valve-actuator are sized accordingly so that when engaged, the valve-actuator combination fits within the confines of an emergency hood located under the dome of a transportable tanker.

Abstract: The device is used for a shut-off device for pipes comprising a spindle communicating with a shut-off device arranged in a housing, whereas the spindle is borne in an upper part of the housing so as to be axially slidable, the upper part of the housing being provided with a cover resting on the housing, whereas the interior space of the cover is communicating with the medium led through the housing, whereas the spindle (40) is provided at its lower end facing the shut-off device (80) with a ring (60) carrying at least two concentrically arranged expansion bellows, whereas the inner expansion bellows (70) is communicating with the spindle (40) and the other outer expansion bellows (50) is communicating with the flange (11b) of the cover of the housing (11).