Abstract: In a fluid-operated drive for a field device, the drive being designed to set a control valve of the field device, a fluidically operated basic drive is provided with a basic working chamber loaded fluidically and delimited by a basic drive housing part and by a basic actuating piston guided in the basic drive housing part. At least one supplementary drive is provided with a supplementary working chamber loaded fluidically and delimited by a supplementary drive housing part. The basic drive housing part and the supplementary drive housing part are displaceable in one another in accordance with a piston and chamber arrangement so that a volume of the supplementary chamber changes in the event of a relative movement of the drive housing parts.

Abstract: The invention discloses a metering valve for metering a metering material, having a valve chamber comprising an outlet aperture, a closure element arranged in or on to the valve chamber, a valve chamber casing and an actuator assembly realized to move at least the outlet aperture, preferably the valve chamber, relative to the valve chamber casing in an ejection direction and/or a retraction direction during operation such that, in at least one movement mode, metering material is expelled by the closure element through the outlet aperture by a movement of the outlet aperture in the ejection direction. The invention further discloses a metering method which can be performed by means of such a metering valve.

Abstract: Provided is a method of manufacturing an eccentric valve of a tri-offset structure including a valve body, a valve seat, a valve unit, and a valve stem. The method includes steps of providing a seal being a centrosymmetric ring with an outer edge surface being a cambered surface with a fixed curvature; disposing the seal on an annular surface of the valve unit; enabling the disposal position of the seal on the annular surface to deviate from the disposal position of a pair of second shaft holes provided in a longitudinal direction of the valve unit.

Abstract: It is an object of the present invention to provide an electromagnetic valve structure improved in terms of the responsiveness of the electromagnetic valve and helping to realize a more accurate flow rate control, and to provide a high-pressure fuel supply pump in which the same is mounted. There is provided a high-pressure fuel supply pump having an electromagnetic valve equipped with an electromagnetic coil generating an electromagnetic force for opening and closing a valve body provided between a fuel intake path and a pressure chamber, a movable member operated by the electromagnetic force, a housing accommodating the movable member, and a back-pressure chamber formed between the housing and the movable member, wherein a first fuel path causing the back-pressure chamber to communicate with the intake path passes the center axis of the movable member.

Abstract: A piston assembly includes a piston with a first cap disposed on a first end of the piston and a second cap disposed on a second end of the piston. A piston cross-member is in between the first cap and the second cap. A first cover is affixed to a first side of the piston cross-member. A second cover is affixed to a second side of the piston cross-member. The second side of the piston cross-member is opposite the first side of the piston cross-member.

Abstract: A control system includes a hydraulic pressure control valve and an electronic control unit. The hydraulic pressure control valve includes a spool configured to be moved inside a sleeve. The hydraulic pressure control valve is configured to control a hydraulic pressure by moving the spool between a first end and a second end of the sleeve. The hydraulic pressure control valve includes a stopper configured to transmit vibration to the sleeve. The electronic control unit is configured to control the spool to vibrate in the first end or the second end when foreign matter is stuck in the hydraulic pressure control valve, such that the spool or a member that moves the spool repeatedly hits the stopper.

Abstract: The quick-fit coupling (1) for pressurized fluid comprises a valve body (3) extending along a longitudinal axis (L) and having an axial cavity (4) wherein a shutter stem (5) is axially movable with respect to the valve body in contrast to and by action of at least one elastic element (6) between a position for opening and a position for closing an axial passage of fluid through said cavity (4), the stem (5) being configured so as to be subjected by the fluid present in the cavity (4) to a resultant force having a substantially null component at least in an axial direction.

Abstract: Disclosed is a urea injection device for a selective catalyst reduction device. The urea injection device for a selective catalyst reduction device serves to inject urea into a urea tank through a urea injection port and a urea injection line that connects the urea injection port and the urea tank. The urea injection device may include: i) a leveling pipe which is connected with the urea tank, ii) a separator which is installed to be connected with the leveling pipe, and connected to the urea injection port through a gas recirculation line, iii) a gas vent line which is connected with the separator, and iv) a check valve which is installed in the gas vent line.

Abstract: A valve device includes a valve having an electrodynamic actuator. The electrodynamic actuator includes a movably mounted control element having a coil and a magnet arrangement immovable relative to the coil. A driving force caused by energization of the coil and transmitted to the control element substantially is linearly dependent on the current intensity. A front-end electronic unit is connected with the coil and includes a capacitor connected in parallel to the coil. A method for controlling a valve as mentioned above provides that, upon actuation of the electrodynamic actuator, during energization of the coil by a voltage source, a capacitor connected in parallel to the coil is charged. After termination of the energization by the voltage source, the coil is energized further by a discharge of the capacitor.

Abstract: An apparatus for controlling a flow of a fluid, such as a drilling fluid or drilling mud, is disclosed. The apparatus may include: a valve member; and a float member mechanically coupled to the valve member and configured to operate on the valve member when fully submerged in a fluid. The coupled float member is configured to increase flow through the valve member as a density of the fluid decreases and to restrict flow through the valve member as the density of the fluid increases.

Abstract: A diffuser basket includes a screen portion and a flow modifier positioned within the screen portion. The flow modifier is configured to change the direction of flow of a fluid introduced into the diffuser basket. The flow modifier can include a plurality of flat plates coupled to the screen portion and positioned at spaced apart intervals along a longitudinal axis of the diffuser basket. The flow modifier can include a plurality of truncated conical plates positioned at spaced apart intervals along a longitudinal axis of the diffuser basket, the plurality of truncated conical plates coupled to the screen portion. The plurality of flat or truncated conical plates each can include an opening. The plurality of flat truncated conical plates each has a cone angle that forms an oblique angle with respect to the longitudinal axis. These cone angles can be the same or they can be different.

Abstract: Valve assembly (10) comprises two valve portions, an upper and lower valve portion (12,24), each having a valve housing indicated generally at (16,18) which are generally annular and a valve closure member (20,20?) which is pivotally mounted within the housing. The valve closure member (20,20?) is in the form of an annular disc and is provided with spindles (22,22?) by means of which the valve closure member is pivotally mounted within the housing. The valve closure member (20,20?) and the spindles (22,22?) are machined from a single piece of metal.

Abstract: A motion conversion device is disclosed for converting motion in one direction into motion in another direction. The motion conversion device may include a single-acting cylinder hydraulically or pneumatically coupled to a double-acting cylinder such that movement of the single-acting cylinder along an axis causes movement of the double-acting cylinder along a non-parallel axis. The single-acting cylinder may be mechanically coupled to another single-acting cylinder such that movement of one of the single-acting cylinders in a direction causes movement of the other one of the single-acting cylinders in an opposite direction. In this way, the single-acting cylinders may cooperate to provide reciprocal motion of the double-acting cylinder. Also disclosed is a valve incorporating a motion conversion device for the purpose of moving a closure member between an open position and a closed position. Furthermore, a method for operating a valve closure member with a motion conversion device is disclosed.

Abstract: A valve, in particular for hydraulic circuits, includes a valve body (4) designed as a cartridge that can be fixed in a housing (6) having fluid connections (8) by a securing device (20, 26, 28). The securing device has at least one blocking element (20) in the form of a separate component between the valve body (4) and the housing (6). The blocking element has blocking surfaces that can be moved relative to the longitudinal axis (18) of the valve body (4) between an assembly position allowing the valve body (4) to be inserted into the housing (6) and a blocking position in which the blocking surfaces secure the valve body in an assembly position, preferably with zero backlash by bearing against retaining surfaces (26, 28) of the housing (6) and the valve body (4).

Abstract: A gas compression system and a method of flow conditioning by a gas compression system are provided. A gas compression system includes a compact flow conditioner in a form of a flow conditioner tank and a combined multi-phase pump and compressor unit comprising an impeller configured to compress a mixture of gas and liquid, wherein the gas compression system is configured such that the gas and the liquid are separated in the flow conditioner tank, the separated gas and liquid are sucked up through the separate gas and liquid pipes and re-mixed again upstream of the impeller, and the liquid is distributed in a gas flow by Venturi effect, and wherein the Venturi effect is obtained by a constriction in the outlet pipe to the impeller, just upstream of the impeller.

Abstract: A valve assembly for an exhaust gas recirculation (EGR) system which provides emission control, regulates flow of exhaust gases, and is suitable for gasoline or diesel applications. The EGR valve assembly is a latching valve assembly which reduces power consumption (i.e., continuous electric draw) from the battery while the valve is either being held open or closed, and reduces electrical interference inherent with integrated position sensors. The valve assembly includes a latching mechanism controlled by an actuator which allows a valve to latch open or closed. The valve may be a single stage valve or a multi-stage valve, which includes a latching mechanism that allows for intermediate open positions, and uses of only a short, single pulse of voltage, to change the state of the valve. The actuator may also be held energized at full extend, maintaining a maximum valve open position, creating additional flow capability of the valve assembly.

Abstract: A valve device for fuel tank has a case having an air flow valve orifice connected to outside of the tank at an upper part and a fuel inflow part beneath this air flow valve orifice, and being divided into an upper chamber and a lower chamber by a partition formed between the air flow valve orifice and the inflow part; an upper float body being inside the upper chamber and ascending by fuel flowing into the case to be seated in the air flow valve orifice; and a lower float body being supported inside the lower chamber of the case with an upwardly projecting guide shaft being inserted to be movable vertically inside an insertion part formed on the partition, and ascending by fuel flowing into the case to close a main connect-through part between the lower chamber and the upper chamber formed on the partition. A receiving hole for receiving the guide shaft of the lower float body is provided on the upper float body.

Abstract: Exemplary illustrations of a fluid valve, e.g., a return valve for returning residual paint, rinsing agent, and compressed air from a paint line when changing color in a painting system, are disclosed. An exemplary fluid valve may be adjusted between an open position, in which the fluid valve is at least partially open, e.g., for rinsing a paint line with a rinsing agent and for pressurizing the paint line with a new color for the color change, and a closed position, in which the fluid valve is closed, e.g., for applying the new color after the color change. An exemplary fluid valve may switch to the closed position, upon actuation by the medium thereof, e.g., medium flowing through or present in the valve. In another example, a fluid valve may close depending on the fluid present at the input side.

Abstract: A combined multi-phase pump and compressor unit and a gas compression system are provided. The combined multi-phase pump and compressor unit functions on a centrifugal principle for transporting liquid and gas from a flow conditioner to a remote multi-phase receiving plant, wherein a rotating separator separates liquid and gas upstream of a compressor part of the combined multi-phase pump and compressor unit, wherein the separated liquid is collected in a rotating annulus in such a way that the liquid is given kinetic energy which is converted to pressure energy in a static system, and wherein the pressurized liquid bypasses the compressor part of the combined multi-phase pump and compressor unit, and then is re-mixed with the gas downstream of the combined multi-phase pump and compressor unit.

Abstract: A choke valve system includes a choke valve having a body and an annular seat disposed within the body. The choke valve also includes a plug configured to move relative to the annular seat between an open position in which a fluid is enabled to flow through the choke valve and a closed position in which the fluid is blocked from flowing through the choke valve and in which the plug contacts an annular seating surface of the annular seat. The choke valve further includes a damper coupled to the plug, and the damper is configured to absorb a load generated by contact between the plug and the annular seating surface of the annular seat as the plug moves into the closed position.