Abstract: A fluid flow controller includes a first body portion defining a receiving surface, a second body portion, and a fluid transfer device. The second body portion includes a controller engagement member, and is configured to couple to the first body portion such that the controller engagement member faces and is spaced from an engagement point of the receiving surface. The controller engagement member is configured to be adjusted from a first distance to a second distance closer to the engagement point than the first distance based on a force applied by a foot pedal apparatus. The fluid transfer device defines a flow channel configured to be adjusted from defining a first cross sectional area to a second, lesser cross sectional area while the controller engagement member is in contact with the first fluid transfer device and adjusted towards the second distance in response to the applied force.

Abstract: A flapper for use in a servovalve is described, the flapper comprising a first material and a second material, the first material having a first coefficient of thermal expansion and the second material having a second coefficient of thermal expansion and wherein the first and second coefficients of thermal expansion are different to each other. An armature/flapper assembly is also described, which comprises this flapper as well as a plate and a torsion bridge. A method of compensating for alteration of the null of a servovalve due to temperature changes in a servovalve is also described.

Abstract: A motor operated valve includes a feed screw mechanism and a stopper mechanism. The feed screw mechanism includes a guiding part including an external thread portion on an outer surface thereof, and a guided part that is a cylindrical member constituting a rotation shaft of a rotor, and including an internal thread portion, which is engaged with the external thread portion, on an inner surface thereof. The stopper mechanism includes a stopper portion provided on the guided part, and a stopping face formed integrally with the guiding part. When a valve element is driven by the motor to move in a valve closing direction, the stopping face stops the stopper portion to restrict the movement of the rotor in the valve closing direction.

Abstract: A two-stage fluid control valve includes a first stage electronically switchable, bi-stable two-port valve movable between an open position and a leak-free closed position, and a second stage microvalve configured to control the flow of fluid through a fluid outlet of the two-stage fluid control valve when the first stage electronically switchable, bi-stable two-port valve is in the open position. The electronically switchable, bi-stable two-port valve is disposed between the second stage microvalve and a fluid inlet of the two-stage fluid control valve.

Abstract: A stem-guided valve for use inside of a fluid end. The valve body is installed in a conduit that traverses the fluid end housing. A removable guide element is installed within a bore formed in the valve body. A static component that is interposed within the conduit includes an elongate projecting stem. As the stem reciprocates axially with the guide element, the valve is caused to move between open and closed positions. In its closed position, the valve body engages a valve seat that surrounds the conduit. A plurality of perforations are formed in the walls of the guide element, the perforations allow fluid to drain from the guide element during operation.

Abstract: Provided are an electronic expansion valve, a control system, and a control method, including: a step motor and a Hall sensor; the step motor includes a rotor and a stator; the rotor includes a permanent magnet; the Hall sensor is provided on the outer periphery of the permanent magnet; the Hall sensor and rotor are arranged in the radial direction, and the stator and Hall sensor are arranged in the axial direction; the main-body part of the Hall sensor is used for sensing the magnetic pole change of said permanent magnet; such a structure reduces the effect that an operating environment has on the Hall sensor when detecting a signal.

Abstract: A fluid valve control system includes a linear actuator assembly with a linear actuator, a mechanical amplifier, and a mechanical output member; a fluid control valve, including: a valve body with a fluid chamber and an outlet aperture, a fluid supply line, a plunger member; a fluid reservoir with a pressurized fluid, and a fluid dispensing control unit; such that the fluid flows in a flow from the fluid supply line into the fluid chamber and out via the outlet aperture; such that plunger member moves vertically downward when the outer end of the plunger member is impacted by the mechanical output member, such that an inner end of the plunger member blocks the outlet aperture, such that the flow of the fluid is interrupted.

Abstract: A valve for a pressurized fluid, including a body housing a fluid circuit including an upstream end configured to be placed in communication with a reserve of pressurized fluid and a downstream end configured to be placed in communication with a receiver apparatus, the circuit including a control member controlling the flow rate in the circuit, said flow rate control member being operated by a mobile actuating member configured to move relative to the body of the valve, the valve including at least a first functional electronic member and a second functional electronic member, the second functional electronic member being mounted removably on the body of the valve.

Abstract: A valve for opening up or closing off a flow path includes: a valve disk; a valve tappet having: a central axis, a first end region adjacent to the valve disk, and a second end region facing away from the valve disk; and a transmission device configured to transmit a rotational movement into a translational movement. The transmission device includes: a toothed segment, and a rocker lever mounted so as to be rotatable, about a rocker lever axis of rotation, by a drive plate via the toothed segment. The rocker lever is connected to the valve tappet by pushrods, the pushrods being mounted rotatably in relation to the rocker lever and the valve tappet.

Abstract: A solenoid valve device includes a body including a gas passage and an accommodation portion communicating with the gas passage, a solenoid valve that is accommodated in the accommodation portion and that controls flow of gas by opening and closing the gas passage, a sealing member disposed between the accommodation portion and the solenoid valve to maintain airtightness of the gas passage, and a solenoid that generates power for the solenoid valve to open and close the gas passage, wherein the body is provided with a communication hole that allows communication between inside and outside of the accommodation portion; the solenoid includes a connection terminal portion extending toward the communication hole; and a connector is accommodated in the communication hole in a manner such that rotation of the connector in a circumferential direction about an axis of the communication hole is suppressed.

Abstract: Valve trim apparatus for use with fluid valves are disclosed. An example apparatus includes a cage to be positioned in a fluid flow passageway of a valve body. The cage having a first end and a second end opposite the first end. The cage including columns extending between the first end and the second end at an angle relative to a primary fluid flow path of the cage. Each of the columns includes fluid flow passageways extending through the column from an outer peripheral surface of the column to an interior surface of the column. The columns are radially spaced about a circumference of the cage body to define fluid flow passageways between the columns.

Abstract: A solenoid actuator includes a housing, a solenoid coil carried within the housing. An armature is carried within the housing and acted upon by the solenoid coil. A torque transfer arrangement of the solenoid actuator is configured to produce a rotational torque output upon an actuation of the armature. A firing pin is in contact with the torque transfer arrangement such that the rotational torque output produced by the torque transfer arrangement linearly transitions the firing pin from an unfired position to a fired position.

Abstract: Exemplary embodiments are directed to systems and methods used to minimize force variation from a solenoid through an operating stroke. The systems and methods generate a near constant or substantially constant force solenoid assembly which can be used in a force driven device, such as, for example, a pressure regulator for accurately controlling pressure in a pressurized flow system. The systems and methods are based on an initial solenoid characterization and include an application of springs and placement of the solenoid within the system at a gap distance to minimize variation in force in the operating stroke of a commercially available solenoid.

Abstract: A pressure equalization valve comprises a first pressure cylinder, a second pressure cylinder, an aperture, and a stationary member. The stationary member is located between the first pressure cylinder and the second pressure cylinder. The second pressure cylinder is located within the aperture. A primary piston is located within the first pressure cylinder and a secondary piston is located within the second pressure cylinder. A stem is directly connected to the aperture and the primary piston. The stem includes a fluid passage between the first pressure cylinder and the second pressure cylinder. When a pressurized fluid is introduced into the first pressure cylinder, the pressurized fluid pushes the primary piston and the stem to open the aperture in a linear direction, the pressurized fluid travels to the second cylinder through the fluid passage and pushes against the aperture in the same direction as said first piston further opening the aperture.

Abstract: A solenoid valve has a housing, which has a fluid inlet and a fluid outlet, and an electromagnetic drive, which comprises a solenoid with a fixed core and a movable armature, wherein the armature interacts with a valve seat. A pressure compensation chamber which is bordered by a membrane is formed in the armature, wherein the pressure compensation chamber is in fluid connection in terms of flow with the fluid inlet by means of a pressure compensation channel.

Abstract: An electrically operated gas flow regulating valve causes a needle valve body to move axially by the rotation of an electric motor through a motion conversion mechanism. The mechanism includes: a rotating body rotated by the electric motor; a cylindrical cam body prevented from rotating; a cam pin which is engaged with a spiral cam groove formed in the cam body and which is fixed to the needle valve body. The cam body is divided into two parts of a forward-side half part and backward-side half part with the cam groove serving as a boundary. The backward-side half part is urged by a coil spring in the forward direction such that the cam pin is pinched between the forward-side side edge of cam groove formed in the forward-side half part and the backward-side side edge of cam groove formed in the backward-side half part, thereby restraining the occurrence of hysteresis.

Abstract: An electric valve and a control method therefor are disclosed. The electric valve comprises a mechanical valve body, a motor (1), a valve switch state detection apparatus, a control line (9) and a control circuit (80). The motor and the mechanical valve body are in transmission connection; the control line is electrically connected to the control circuit; the control circuit comprises a drive module (2) and a power supply module (5); and the motor, the valve switch state detection apparatus and the power supply module are respectively connected to the drive module. The control circuit further comprises a backup power supply (90) electrically connected thereto.

Abstract: A valve signature diagnosis and leak testing device includes a spool valve operatively connected to a pilot valve, the pilot valve being configured to position the spool valve to one of an open position and a closed position. A blocker valve is fluidly connected to a control fluid outlet of the spool valve. An electrical module is operatively connected to the pilot valve, a supply of control fluid, and the blocker valve, the electrical module being capable of sending pulsed electrical signals to the pilot valve and the blocker valve to selectively position the spool valve and the blocker valve to an open or closed position.

Abstract: Mass flow controllers and control valves are disclosed. A control valve includes a poppet including a plurality of vertical flow channels, and the control valve also includes an orifice element that includes a plurality of vertical flow channels extending from a bottom surface of the orifice element, through the orifice element, to a top surface of the orifice element. The vertical flow channels of the orifice element are axially misaligned with the vertical flow channels of the poppet to prevent gas from flowing through the orifice element when the gap between the top surface of the poppet and the bottom surface of the orifice element is closed.

Abstract: An irrigation control device comprises a coil adapted to develop an electromagnetic flux sufficient to cause actuation of irrigation equipment. Control circuitry is electrically coupled to the coil to receive control signals from an irrigation control unit and to control the flux at the coil. A housing covers at least a portion of both the coil and the control circuitry, the housing including a threaded end configured to thread the irrigation control device to a valve assembly to be actuated by the electromagnetic flux of the coil.