Abstract: A valve assembly of a fluid end of a pump may include a valve seat having a bore defining an inner surface and an outer surface of the valve seat, a first end configured to engage with a valve in a closed position of the valve, and a second end, opposite the first end, defining a groove surrounding the bore. The valve assembly may include a sacrificial ring, positioned in the groove, configured to control corrosion of a fluid end block of the fluid end.

Abstract: A valve assembly having a handle and a valve body. The valve assembly includes an indicator and a marker that denote the rotational range and position of the handle relative to the valve body. The indicator generally has a contrasting color compared to the handle to ensure visibility. The indicator can be an inlay embedded on the top side of the handle. The indicator is generally arc-shaped. The alignment of the marker and the indicator can allow users to determine an appropriate direction to rotate the handle that is within the rotational range of the handle.

Abstract: A pressure reducing valve includes a valve housing, plunger, pressure sensing cavity, and biasing member. The valve housing includes a valve inlet and valve outlet in selective fluid communication with each other. The plunger is in the valve housing and movable between a closed position and open position. The plunger is positioned downstream from the valve inlet and upstream from the valve outlet. The plunger includes a venturi and a channel. The venturi is within the plunger and has a venturi inlet and venturi outlet. The channel is within the plunger and is in fluid communication with the venturi. The pressure sensing cavity is in fluid communication with the channel. The biasing member exerts a biasing force on the plunger toward the open position. The channel is in fluid communication with the pressure sensing cavity to provide a fluid pressure that is lower than the outlet pressure during flow.

Abstract: A valve arrangement for a fluid control system has a housing, comprising a fluid inlet, a fluid outlet, and extending along a central axis. The valve arrangement has a valve component, movable along the central axis between a first position, closing the fluid inlet, and a second position, a maximum valve lift defined therebetween. The valve arrangement has a biasing member, biasing the valve component towards the first position, and an intermediate component movable along the central axis, and relative to the valve component. The valve arrangement has a first stop and a second stop, the intermediate component axially movable therebetween, a range of the relative axial movement being less than the maximum valve lift.

Abstract: A vacuum valve for high/ultra-high vacuum systems includes a valve housing defining a passage connecting a first and a second opening of the housing. A valve body and a complementary seat is disposed in the passage, the valve body and/or the seat including a seal and the valve body being movable in a linear axial direction along between an open position and a closed position. The valve body cooperates with the seat in the closed position so as to close the first opening gas-tightly. An electromechanical actuation unit for actuating the valve body includes an electric motor and a mechanical conversion unit with an input portion drivingly connected to the motor and an output portion drivingly connected to the valve body. The conversion unit converts a rotational output of the electrical motor into a linear movement of an output portion to move the valve body in the axial direction.

Abstract: A mechanical power transmission module (10) comprising a housing (100) and a plurality of parts forming an epicyclic gear train, one of the inputs/outputs (101) of which is immobilized in relation to the housing, the other two inputs/outputs comprising an input (120) and an output (130, 140), power being supplied by an input shaft (110) of the module, the input shaft (110) being coupled to the output assembly (130, 140) by means of the input assembly (120) in a first axial position of the shaft. The input assembly (120) comprises a through-bore (123) and the output assembly (130, 140) comprises direct coupling means (142), toward the through-bore (123), accessible in a second position obtained by axial translation.

Abstract: Techniques involve detecting a mechanical play (Ws) in a system having a hydraulic valve and a valve drive for driving the hydraulic valve. A valve slide, which is driven by the valve drive of the hydraulic valve, is clamped with at least one return spring which is designed, in the case of a de-energized valve drive, to push the valve slide from any arbitrary valve slide position back into a neutral position of the valve slide.

Abstract: A fluid control device includes a housing portion including an inlet port and an outlet port, and a valve portion fixedly coupled to an internal surface of the housing portion, in which the valve portion includes a lower plunger module, an upper plunger module, an elastic member including one side configured to press the lower plunger module downward and the other side configured to press the upper plunger module upward, and a solenoid, in which the lower plunger module includes a lower plunger member movable in an upward/downward direction H, and in which the upper plunger module includes an upper plunger member provided to be movable in the upward/downward direction H relative to the housing portion, and a core provided to be penetrated by a partial region of the upper plunger member and including at least a partial region surrounded by the solenoid.

Abstract: A tandem gas valve includes a valve body, a first solenoid valve and a second solenoid valve. An inlet passage, a first chamber, a second chamber, a third chamber and an outlet passage are successively provided on the valve body along a gas flow path, a first valve seat is provided between the first chamber and the second chamber, and a second valve seat is provided between the third chamber and the outlet passage. Upper ends of the first valve seat and the second valve seat are respectively provided with a sealing rib and inclined surfaces located at both sides of the sealing rib, an upper end face of the valve body is provided with first openings at positions corresponding to the first valve seat and the second valve seat, and the two solenoid valves are arranged corresponding to the first openings.

Abstract: A fluid ejection system includes an electromagnetically operated valve for regulating the flow of a fluid. The electromagnetically operated valve includes a valve body defining a fluid inlet and a fluid outlet, a plunger member, an electromagnetic driving means, and a spring adapted to bias the plunger member toward a closed position. The electromagnetic driving means is adapted to drive the plunger member along an open direction inside the valve body and into an open position facilitating the flow of the fluid through the valve body. The electromagnetic driving means includes a coil and a coil reel. The coil is arranged to surround the coil reel, and the coil reel is arranged to surround the plunger member for generating an electromagnetic field suitable for driving the plunger member into the open position. A nozzle is arranged at the fluid outlet for ejecting the cleaning fluid.

Abstract: A pressure-balanced valve is disclosed, which can be used both as a control valve and as an ON-OFF valve, whose sealing system is marked by a longer service life as compared to that of prior art solutions. The longer service life derives from the fact that the sealing elements are energized when the valve is closed, whereas they maintain a non-energized condition during valve regulation (when the closure member is subject to oscillations relative to the cage body). Advantageously, the sealing assembly as disclosed herein is easy to produce and assemble, as it can be inserted (and subsequently removed) together with the closure member, via a stem to which the closure member is connected.

Abstract: Systems, methods, and devices for magnetically actuating a gate valve of a subsea system via external magnetic actuation from a magnetic actuator. The magnetic actuator is disposed externally around a valve cavity such that motion of a valve stem disposed within the valve cavity can be controlled externally through magnetic coupling with the magnetic actuator such that a physical link (and the dynamic pressure seals associated therewith) is not needed to actuate the valve stem.

Abstract: An electromagnetic valve and an electromagnetic valve assembly are provided. The electromagnetic valve includes a first elastic member. An end of the first mounting cavity proximal to the valve port is provided with a limiting portion integrated with the valve body, the first elastic member is sleeved on the plugging assembly. One end of the first elastic member abuts against the plugging assembly, the other end of the first elastic member abuts against the valve body, and an outer surface of the other end of the first elastic member abuts against the limiting portion.

Abstract: A flow rate adjustment device includes: an adjustment unit including a pipe and a sealing plate provided below an outlet of the pipe, the sealing plate having a sealing surface; and a moving unit that moves the sealing plate to a sealing position where the sealing surface of the sealing plate is positioned vertically below the outlet of the pipe and a retraction position where the sealing surface of the sealing plate is retracted from a point vertically below the outlet of the pipe.

Abstract: A valve spring holder, a valve box, and a plunger pump. The valve spring holder includes a body part, a first supporting part, a second supporting part, a spring mounting part, and a limiting groove. The first supporting part is connected to a first end part of the body part. The second supporting part is connected to a second end part of the body part. The spring mounting part is connected to a middle part of the body part. The first supporting part includes a first supporting surface, the second supporting part includes a second supporting surface, the first supporting surface and the second supporting surface are in contact with the valve box, and the limiting groove is located in at least one of the first supporting part and second supporting part, and is exposed to at least one of the first supporting surface and second supporting surface.

Abstract: A valve (18.1) includes a first and second port (50, 52) connected by a flow path to allow medium containing solid particles to pass therethrough. The valve also includes a valve seat (61), a closure unit (62), and a cavity (85) configured to receive at least part of the closure unit. The closure unit further comprises (i) a barrier piston (74) inhibiting the flow of solid particles from the second port when the closure unit is in its closed position; (ii) a bleed passage connecting the cavity with the second port to provide a pressure balancing arrangement that reduces a pressure therebetween, and (iii) a downwards sloping top extending from a central portion of the barrier piston to the outer surface of the barrier piston to permit fine particles in the cavity to settle through the bleed passage towards the second port.

Abstract: A valve assembly for select distributed discharge of received fluid in a predetermined manner is generally provided. The assembly includes a manifold and a rotatable valve body. The manifold has an internal chamber, a fluid ingress passage for receipt of fluid, and a plurality of fluid discharge conduits. The fluid ingress passage and fluid discharge conduits are in fluid communication with the internal chamber. A first internal chamber section is characterized by the fluid ingress passage with a second internal chamber section characterized by ingress portions of the fluid discharge conduits.

Abstract: A valve assembly for a piston compressor, in particular an oil-free piston compressor for generating compressed air in a rail vehicle, includes a valve plate having a compressed-air opening, a valve retainer and a valve lamina which is flexible and/or movable in relation to the valve retainer and is provided for opening and closing the compressed-air opening; wherein a damping and/or braking device is provided which is associated with the valve lamina.

Abstract: The presently disclosed invention relates to a hydrogen valve having a valve housing with a fluid inlet and a fluid outlet. The hydrogen valve includes a valve main body which is configured to be transferable between an open position, in which a volumetric flow connection is established between the fluid inlet and the fluid outlet, and a closed position, in which the valve main body is arranged in a main sealing seat fixed to the housing and the volumetric flow connection between the fluid inlet and the fluid outlet is closed. Also included is a pilot control valve device having a pilot member which is transferable by way of an actuator between an open position in which a throttle bore is exposed through the valve main body and connects the fluid inlet and the fluid outlet to each other and a closed position, in which the pilot member rests in a pilot control valve seat arranged on the valve main body and closes the throttle bore.

Abstract: An electric valve control device is configured to (i) start inputting pulse to a stepping motor to rotate a rotor in a first direction, (ii) obtain a rotation angle of the rotor based on a rotation angle signal and a position of the rotor based on a magnetic-flux-density signal each time pulse is input to the stepping motor, and (iii) stop inputting pulse when a change in the rotation angle of the rotor matches a change pattern information and a position of the rotor is a proximity position or a position nearer a reference position than is the proximity position. The change pattern information includes a change in the rotation angle indicating rotation in a second direction.