Abstract: A valve includes an electrodynamic actuator which has a magnet arrangement for generating a magnetic field and a control element movable relative to the magnet arrangement. The control element includes an energizable coil which is arranged in the magnetic field and is firmly coupled to a coil carrier. The control element is movable between at least two defined positions. There are provided permanent-magnetically interacting holding force which retain the control element in at least one of the defined positions, even when the coil is currentless.

Abstract: A dual function ram system for a blowout preventer (BOP) includes a first dual function ram that is configured to move within a cavity of the BOP between a withdrawn position to cause the BOP to be in an open configuration and an extended position to cause the BOP to be in a closed configuration. The first dual function ram includes a shearing surface that is configured to shear a tubular within a central bore during a shearing operation and a pipe-sealing surface that is configured to seal against the tubular within the central bore during a pipe-sealing operation.

Abstract: A control valve includes a cage is disposed within a valve body adjacent to a valve seat. The cage includes a first sleeve and a second sleeve. The first sleeve includes a first circumferential wall having a first inner surface, a first outer surface, and a first longitudinal axis. The first sleeve also includes a first plurality of openings disposed in the first circumferential wall. The second sleeve includes a second circumferential wall having a second inner surface and a second outer surface and a second longitudinal axis. The second sleeve also includes a second plurality of openings disposed in the second circumferential wall. The first outer surface of the first circumferential wall is tapered at a first angle relative to the first longitudinal axis, and the second inner surface of the second circumferential wall is tapered at a second angle relative to the first longitudinal axis.

Abstract: A servo valve includes a valve housing, a cavity formed in the valve housing defining an axis (X) and an axially moveable member disposed in the cavity. At least one actuator is configured to axially move the member within the cavity and a spring is arranged between first and second axial ends of the valve housing. A channel is formed within the cavity and a plurality of ports each forming a fluid passage through the valve housing in fluid communication with a spool and with the channel. The plurality of ports comprise first and second nozzles with nozzle openings, wherein in a first axial position of the member the first nozzle opening is at least substantially obstructed, and in a second axial position of the member the second nozzle opening is at least substantially obstructed, the member controlling fluid between the spool and the channel.

Abstract: A magnetically damped check valve having a non-magnetic metal sleeve and a spring-biased poppet disposed within the check valve. The spring-biased poppet is operably supported by the sleeve. A poppet guide is attached to the sleeve. The poppet includes a shaft that is slidably attached to the poppet guide. A portion of the shaft extends into the sleeve. At least one magnet is attached to the portion of the shaft that extends into the sleeve. The magnet therefore moves with the shaft as the poppet moves in response to changes in differential pressure across the check valve. The magnet produces a magnetic field. As the magnet moves within the sleeve, the magnetic field changes thereby inducing an electrical current in the sleeve which produces another magnetic field that opposes the magnetic field of the magnet thereby damping the movement of the magnet and hence, damping the movement of the poppet.

Abstract: A blowout preventer and method of closing a wellbore. The blowout prevented has a main body containing a wellbore, a passage transverse to the wellbore, a shearing device located in the passage; and a charge that, when activated, propels the shearing device along the passage and across the wellbore to close the wellbore and prevent a blowout.

Abstract: Purge apparatus for use with fluid valves are disclosed. An apparatus includes a stem for a fluid valve. The stem has a first channel extending therethrough to receive a fluid. The apparatus also includes an aperture in fluid communication with the first channel and disposed on an outer surface of the stem or a fluid flow control member coupled to the stem. The aperture is to exhaust the fluid from the first channel toward one or more components of the fluid valve to remove residue.

Abstract: An intermittent fluid delivery system includes a fill tank and a batch tank which is connected to the fill tank via a first pump and a first hose. The fill tank holds a first quantity of fluid. The batch tank holds a second quantity of fluid, which is lesser than the first quantity. The first pump delivers fluid from the fill tank to the batch tank. A second pump delivers fluid from the batch tank to a receiving tank.

Abstract: A gap control device that works with a plug on a valve assembly for use in high-temperature applications. The plug may include two parts and a compressible seal that, when compressed, engages with an adjacent wall of a cylinder or “cage” typical of a trim assembly. In one embodiment, the gap control device forms a hard stop that expands in response to high temperatures. This feature prevents excess over-travel between the two parts of the plug in the high-temperature applications so as to limit stress and wear on the compressible seal.

Abstract: A fluid control valve includes a multi-stage piston actuator unit with first piston and second pistons coaxially and slidably arranged therein and a valve unit provided with an inlet port for inflow of a control fluid and an outlet port for outflow of the control fluid. The first and second pistons are slidable in a sliding direction perpendicular to an imaginary line connecting the center of the inlet port and the center of the outlet port. The multi-stage piston actuator unit has a smaller thickness in a direction perpendicular to the imaginary line and perpendicular to the sliding direction than the thickness of the valve unit in the direction perpendicular to the imaginary line and perpendicular to the sliding direction. The first and second pistons have either an elliptic or oval cross-section taken perpendicular to the sliding direction, the cross-section having a long axis parallel to the imaginary line.

Abstract: An actuator includes: a casing; a reciprocating member provided in the casing to be reciprocatable; a drive part provided in the casing to drive the reciprocating member; a booster mechanism which is configured to amplify a drive force applied by the drive part to the reciprocating member; and a moving member which is configured to move on receiving the force amplified by the booster mechanism. The booster mechanism includes a plurality of levers which are arranged in a circumferential direction of the moving member. Each of the levers has an effort portion which is configured to receive the force from the reciprocating member, a fulcrum portion which is configured to come into contact with the casing to serve as a center of a revolution of the lever, and a load portion which is configured to transmit the force to the moving member.

Abstract: The present invention relates to a top cover (5) for soft throttling valve body (2), the top cover (5) comprising one or more fluid conduits for transferring a pilot fluid flow for setting a degree of opening of a main valve situated in a soft throttling valve body to the soft throttling valve body. Furthermore, the invention relates to a soft throttling valve (1) and a method for assembling the soft throttling valve (1). The object of the invention is to allow a good control of the pilot fluid flow while protecting the soft throttling valve body from damage due to valve failure. The object is solved by having a follower arrangement arranged to throttle the pilot fluid flow depending on the degree of opening of the main valve, further having a manual opening arrangement for manually opening the main valve and/or by further preventing a step-wise opening of the main valve in less than two opening steps. A method for assembling a soft throttling valve is also disclosed.

Abstract: A diaphragm valve structure having application in diaphragm valves made completely from fluororesin at an operating temperature of 200° C. The diaphragm valve uses a thermal isolation method that consists of a heat transfer limiting structure and a heat dissipating structure, ensuring rigidity of the gas cylinder structure. The heat transfer limiting structure uses lattice-shaped ribbed plates with horizontal openings, wherein the lattice-shaped ribbed plates and a minimum diameter area of an annular portion are all provided with heat transfer section thickness. The heat dissipating structure consists of a multilayered structure for a preferred external natural cooling, and further using a coolant gas ensuring that the peripheral portion of the diaphragm and gas-tight sealing components on the valve shaft are sufficiently cooled.

Abstract: A blowout preventer includes a main housing containing a through bore. A first chamber is arranged transverse to the through bore. A second chamber is transverse to the through bore and is diametrically opposed to the first chamber. A first shearing device is located in the first chamber and a second shearing device located in the second chamber. The blowout preventer includes a charge that when activated propels each shearing device along its respective chamber and across the through bore into the opposing chamber, such that the first and second shearing devices are adjacent each other.

Abstract: In one aspect there is provided a ram block inner seal assembly comprising a core member having a top face, a bottom face, a front face, a rear face, and two side faces. A connector portion connects the top and bottom faces. A peripheral member surrounds the front, rear and side faces. The core member further comprises a peripheral groove on at least the front and side faces, the peripheral groove having a cross-sectional profile. The peripheral member further comprises an energizing section that has a cross-sectional profile which substantially matches the cross-sectional profile of the peripheral groove.

Abstract: A gas turbine engine includes a fan section and a star gear system for driving the fan section. A first fan section support bearing is mounted forward of the star gear system and a second fan section bearing is mounted aft of the star gear system.

Abstract: Various devices and techniques related to magnetically-actuated valves are generally described. In some examples, valves may include a bonnet defining an enclosure. In various examples, a movable valve member may be disposed in the enclosure. A valve stem may be disposed in the enclosure and may be operatively coupled to the movable valve member. A first internal ferromagnetic actuation member and a second internal ferromagnetic actuation member may be coupled to the valve stem. The first internal ferromagnetic actuation member and the second internal ferromagnetic actuation member may be disposed in a spaced relationship along the valve stem. In various examples, the valves may include an external actuator slidably engaged to an exterior surface of the valve bonnet. The external actuator may comprise a first magnet magnetically coupled to the first internal ferromagnetic actuation member and a second magnet magnetically coupled to the second internal ferromagnetic actuation member.

Abstract: A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

Abstract: Roller clamps are described herein. A roller clamp includes a housing, a roller wheel, and a locking device. The housing includes a first wall and a second wall, wherein the first wall and the second wall are spaced apart to define a longitudinal channel therebetween, the housing including an upper opening and a lower opening configured to allow a tubing to pass through the longitudinal channel. The roller wheel is disposed at least partially within the longitudinal channel and configured to engage the tubing, the roller wheel including a plurality of teeth extending from an outer surface of the roller wheel, wherein a longitudinal position of the roller wheel relative to the channel adjusts a flow rate through the tubing. The locking device is releasably engaged to the housing and the roller wheel, wherein the locking device prevents movement of the roller wheel from the longitudinal position.

Abstract: The invention relates to a well bore control apparatus, system and method for sealing a well bore. The invention relates to a well bore control apparatus comprising a housing having a guide element defining a path, the housing defining a throughbore for receiving a tubular, a first tapered gate and a tapered second gate located within the housing, the first and second gates being adapted to engage with the guide element. In use the first and second gates are moveable along the path defined by the guide element in a direction substantially transverse to the throughbore between an open position of the throughbore and a closed position of the throughbore. The well bore control apparatus comprises a first seal seat for forming a first seal with the first gate in the closed position to seal the throughbore. The well bore control apparatus may include a second seal seat. The second seal seat may be adapted for forming a second seal with the second gate in the closed position to seal the throughbore.