Abstract: An exhaust throttling valve (12) is provided for a vehicle. The valve includes a body structure (16, 41) having a bore (47) there-through. A shaft (28) is supported by the body structure for rotational movement. A valve member (34) is associated with the shaft such rotational movement of the shaft rotates the valve member. The valve member is disposed in the bore and is constructed and arranged to rotate between a first position substantially closing the bore and a second position at least partly opening the bore. A hard stop (56) is associated with the shaft so as to rotate therewith. First and second adjustment structures (52, 54) are constructed and arranged so that upon rotation of the shaft in one direction, the hard stop engages the first adjustment structure and upon rotation of the shaft in a direction opposite the one direction, the hard stop engages the second adjustment structure, thus limiting travel of the valve member.

Abstract: A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control section for applying drive pulses to the pulse motor, a counting section for counting the number of drive pulses applied to the pulse motor, a voltage-drop detecting section for detecting a voltage drop of a drive power supply for the motor control section, and a writing section for writing a count from the counting section in a nonvolatile memory if the voltage-drop detecting section detects the voltage drop.

Abstract: A flow control valve for fluidized material comprises a valve housing having a valve chamber with a valve seat and a valve plug having a flow passage, the valve plug being arranged inside the valve chamber in front of the valve seat (30) so as to be rotatable about an axis of rotation for controlling a flow through the flow control valve. It further comprises spring means biasing the valve plug against the valve seat perpendicularly to the axis of rotation, for achieving a sealing contact between the valve seat and the valve plug. According to an important aspect of the invention, the spring means comprises at least one cantilever spring (40) arranged in a clearance space opposite to the valve seat (30) so as to bias the valve plug against the valve seat.

Abstract: A pressure-relief valve assembly is improved in that sealing surfaces on both the valve seat and valve head are confrontationally disposed annular planar surfaces oriented substantially perpendicular to the valve axis. A resilient valve seal is formed of a material which deforms to a predetermined extent into sealing engagement against both sealing surfaces when compressed by the spring biasing force. When a vacuum exists the combination of the spring force and a holding force created by a pressure differential acts to increase the extent of compression between the resilient valve seal and both sealing surfaces sufficient to create a vacuum-tight seal. The magnitude of the spring biasing force in discrete increments may be adjusted by varying the degree of threaded engagement between members forming the valve housing.

Abstract: A fast-acting, pneumatic diaphragm valve includes a diaphragm valve closure member, a pneumatic piston that provides a closure force on the closure member, and a solenoid pilot valve that controls pressurized air to the piston to cause the piston to move in a reciprocal manner so that the closure member opens and closes the valve. The valve seat seal can be elastomer for enhancing speed, and the solenoid pilot valve can be positioned and configured with air flow longitudinally through or past the solenoid armature to enhance speed.

Abstract: Butterfly valves assemblies are provided that include a flowbody, a butterfly plate, an actuator and an upper chimney and a lower chimney disposed within the flowbody. The flowbody has an inner surface defining a channel. The butterfly plate is disposed in the channel, is rotationally mounted to the flowbody, and has an outer periphery. The actuator has an actuator output shaft that is coupled to the valve shaft via a serrated spline coupling. The upper chimney and the lower chimney are configured to include bearing assemblies that constrain radial loads and thrust loads exerted upon the valve shaft and minimize misalignment of the serrated spline coupling.

Abstract: A valve trim apparatus for use with valves is described. An example valve trim apparatus includes a cage having an upper portion removably coupled to a lower portion. A closure member is disposed within the cage and has a first seating surface and a second seating surface. A seal assembly is fixed between the upper and lower portions of the cage. The first sealing surface of the closure member sealingly engages the seal assembly when the closure member is in a closed position to prevent leakage between the closure member and the cage.

Abstract: Methods and apparatus for positioning an orifice plate within a body having a straight flowbore. One embodiment includes a carrier supporting the orifice plate and a drive member operable to engage the carrier and move the carrier along a first axis perpendicular to the flowbore. The drive member is also operable to limit the movement of the carrier along a second axis perpendicular to the flowbore and perpendicular to the first axis. A pin is operable to engage the carrier so as to limit movement along the first axis.

Abstract: The invention improves reliability of a valve gear in which a cobalt-based alloy is welded by plasma power building up. The valve gear includes a bearing 2 having a sliding surface against a valve shaft 1. The valve gear having a welded layer 12 made of heat-resistant cobalt-based alloy, based on plasma powder building up, formed on the sliding surface against the valve shaft 1. The welded layer 12 includes a first welded layer 12a formed on the surface of the bearing 2, having a dilution ratio of 5 to 25% and a second welded layer 12b formed on the first welded layer 12a, having a dilution ratio of 50% or less of the dilution ratio of the first welded layer 12a. The dilution ratio indicates the penetration amount of the welding metal into the base metal, and is a value obtained by B/A×100 (%) wherein A represents the total amount of the welded metal and B represents the amount of the welding metal penetrating into the base metal.

Abstract: Provided is a microvalve having a magnetic wax plug which includes a micro fluidic structure having an inlet portion and an outlet portion, a magnetic wax plug provided at a predetermined section where the inlet portion and the outlet portion meet, existing in a solid state, melted at a temperature higher than a predetermined temperature, and reversibly moving along a magnetic field, so as to control flux of a fluid through the micro fluidic structure, a heating portion provided corresponding to the section and heating the magnetic wax plug to be melted, and a magnetic field application portion selectively applying a magnetic field to a position where the melted magnetic wax plug arrives.

Abstract: A valve utilizes a composite two-piece housing to provide a low cost, high strength, light weight alternative to conventional metal and plastic valves adaptable for corrosive and non-corrosive environments. The valve includes a valve body defined by a first body half coupled to a second body half. A valve disk assembly is disposed between the first and second body halves. The disk assembly includes a valve disk, a valve stem and a valve seal. The disk stem is positioned within the valve disk along a central axis of the disk such that when the disk is rotated about the valve stem, the valve is opened or closed. The valve seal includes a primary portion lining an interior surface formed by the first and second body halves to engage an outer surface of the disk. The seal also includes a secondary portion disposed within and between the first and second body halves. The primary and secondary sealing portions configured to retain position within the housing and in sealing engagement with the disk.

Abstract: Stable flow control is made possible even under high-temperature environments by relieving tensional force applied to a piezoelectric element when a piezoelectric actuator is retracted. Thus, a piezoelectric driven control valve includes: a body having a valve seat; a metal diaphragm to contact with and separate from the valve seat; an actuator box supported ascendably and descendably on the body; a split base fixed to the body; a disc spring pressing and urging the actuator box downward to bring the metal diaphragm into contact with the valve seat; and a piezoelectric actuator housed inside the actuator box and that extends upward with application of voltage to press the actuator box upward against the elastic force of the disc spring, and a precompression mechanism, for applying a compression force constantly to piezoelectric elements in the piezoelectric actuator, provided between the split base and the piezoelectric actuator.

Abstract: A method for regulating gas turbine engine fluid flow may include the steps of providing a flow tube having an open valve, a first bend and a second bend, flowing fluid through the flow tube, actuating a piston so that the piston moves in the axial direction, and closing the valve due to the axial movement of the piston.

Abstract: A pneumatic valve actuator for moving the valve stem of a control valve comprises an upper casing and a lower casing each having flanges, a diaphragm plate operatively coupled to the valve stem, a spring arranged to bias the diaphragm plate in a first direction, a diaphragm movable in conjunction movement of the diaphragm plate, an air inlet defined in the casing and arranged for attachment to an air supply source to bias the diaphragm plate in a second direction, and a ring disposed between the upper flange and the lower flange and positioned to engage the outer portion of the diaphragm. The ring includes a protrusion positioned to engage a surface of the outer portion of the diaphragm.

Abstract: A relief valve in a turbomachine is disclosed. The valve includes a gate designed to be mounted so as to pivot about a shaft for the opening and closing of an orifice for the passage of air, a seal, and an attachment device for attaching the seal to the peripheral edge of the gate. The gate and the attachment device are made of a plastic and formed of a single piece or secured to one another by welding or bonding.

Abstract: An automatic flush actuation apparatus, which is incorporated with a flushing system having a water inlet, a water outlet, and a water chamber communicating therebetween, that includes a valve member being moved by a flush lever for releasing the water pressure within the water chamber to allow the water passing from the water inlet to the water outlet, and a sensor-operated powering assembly including a relief valve provided at the valve member for controlling the water flowing to the water outlet and an actuator arranged in such a manner that while sensing a presence of a user of the flushing system, the actuator is driven to move the relief valve to an opened position for releasing the water pressure within the water chamber to allow the water passing to said water outlet.

Abstract: In a pilot-type valve, a valve box enclosing a main valve is arranged in a state wherein same is sandwiched between pipe flanges tightened to one another with bolts. In the pilot-type valve, a pilot valve is used to control a driving force required to operate the main valve to open and close same. In addition, the valve box is flangeless at its connection end portions for connection with the pipe flanges and has an inlet and outlet for a pressurized fluid. A cover flange neck extended upward from the valve box is constricted only at sites on its walls corresponding to adjacent bolts extended between the pipe flanges, so that the cover flange neck can be passed through the interval between these bolts.

Abstract: An electromechanical actuator is provided for converting rotary action into linear action, and includes an electric motor, a cable yoke, an output shaft, and a pair of cables. The electric motor is adapted to be selectively energized and is configured, upon being energized to generate a drive torque. The cable yoke is coupled to receive the drive torque and is configured, upon receipt thereof, to rotate about a rotational axis. The output shaft is coupled to receive a drive force and is configured, upon receipt thereof, to translate along a linear axis that is disposed at least substantially perpendicular to the rotational axis. Each cable is wound, in pretension, on a portion of the cable yoke and around a portion of the output shaft. The pair of cables is configured, upon rotation of the cable yoke, to supply the drive force to the output shaft.

Abstract: Apparatus to connect a valve stem to a valve member are disclosed. An example apparatus includes a valve stem having a laterally extending opening, a valve member having a laterally extending opening, and a coupling having adjacent one end an extension received in the laterally extending opening of the valve stem and adjacent an opposite end an extension received in the laterally extending opening of the valve member. A resilient member is located between the valve stem and the valve member.

Abstract: This invention relates to a control valve which comprises a first and a second flow channel (2, 3), a valve chamber (4) and a closing member (5), from which a shaft (6) extends. A flow connection is established in the control valve through the inner part of the chamber (4). The flow connection into the chamber (4) and the one out of the chamber (4) are constricted at all openings (A1, A2, A3) when the closing member (5) is turned about the rotation axis (10) in the chamber (4).