Abstract: An obturation valve is described for controlling a flow of molten material exiting from a nozzle into a mold cavity, comprising a channel for the molten material extending along a first axis, two or more obturating members that are mounted movably along a respective second axis inclined at an acute angle with respect to the first axis and so that a free end of each obturating member can move and converge towards the same point inside the channel. The free ends of the obturating members can join at said point to compose a blocking/closing bulkhead for the molten material.

Abstract: A valve assembly includes an upper portion to be coupled to guide legs, a cavity being formed within one of the upper portion or the guide legs and a coupling member being associated with the other of the upper portion or the guide legs, wherein the upper portion is coupled to the guide legs via a single force application process.

Abstract: A valve is described that includes: a housing (20); a flow path connecting an inlet and an outlet in flow communication; a valve seat (28) positioned in the flow path; and a valve body which is displaceable between a closed position and an open position. The valve body includes a resiliently deformable elastomeric seal (38) having (i) a contact surface (74) which is complementary to and abuts against the valve seat and (ii) a protrusion (84) extending radially outwards at an upper portion thereof. The valve also has a retainer comprising an inwardly projecting lip defining a recess for accommodating the protrusion therein to assist with lifting the elastomeric seal.

Abstract: Used gas lift valves having a used bellows assembly are remanufactured. Separable components are disassembled, and the used bellows assembly is removed from a dome housing by de-brazing the used bellows at a brazed joint from a mating surface of the dome housing. A replacement bellows is then affixed (e.g., arc welded) to the dome housing's mating surface, and a bellows adapter is affixed (e.g., arc welded) to the replacement bellows. The separable components of the used valve are then reassembled to produce a remanufactured gas lift valve. The remanufactured valve has a replacement bellows composed of a nickel-chromium alloy as opposed to a nickel-copper alloy, has the replacement bellows arc-welded to the dome housing as opposed to being brazed thereto, and has the adapter arc-welded to the bellows as opposed to being brazed thereto.

Abstract: A ventilation flap is provided for a ventilation flap assembly of a vehicle front. The ventilation flap blocks an air inlet of the vehicle front in a closed position and allows the air inlet in an open position. The ventilation flap can be rotated from the closed position into the open position by way of a rotational movement about a rotational axis by an actuator which can be connected to the rotational axis. The ventilation flap is divided into two adjoining regions in the vehicle vertical direction. A first upper region of the two regions in the vehicle vertical direction extends substantially in the vehicle vertical direction, and a second lower region of the two regions in the vehicle vertical direction extends rearwards in the vehicle longitudinal direction and downwards in the vehicle vertical direction from the first region.

Abstract: A direct drive valve for controlling fluid flow, includes a flow spool operable to control fluid flow through the direct drive valve; a control spool located within the flow spool and an actuator operable to drive the control spool relative to the flow spool. The direct drive valve is configured such that in use movement of the control spool relative to the flow spool causes the flow spool to be actuated by fluid pressure.

Abstract: A fixed displacement hydraulic pump match flow demand control system that includes a spool valve, a plurality of fixed displacement pumps and a control valve is provided. The spool valve includes a spool. The spool is configured to shuttle within a chamber of a housing based at least in part on a pressure difference between a first end and the second end of the chamber. A fluid flow from each fixed displacement pump of the plurality of fixed displacement pumps is in fluid communication with an associated input port to the spool valve. At least one output port of the spool valve is in fluid communication with a hydraulically operated device and at least one of another output port is in fluid communication with a return. The control valve is configured to adjust the location of the spool in the chamber to regulate fluid flow to the hydraulically operated device.

Abstract: The disclosure relates to a spring for a rotating valve, having a spring body, wherein the spring body is coiled; an innermost section of the spring body, wherein the innermost section has an inner protuberance; an outermost section of the spring body, wherein the outermost section has an outer protuberance; wherein the spring is constructed of a conductive material and configured to remove electrostatic discharge from the rotating valve.

Abstract: The present invention comprises a valve assembly with an unbalanced seal between sealing components of the valve assembly. For a gate valve assembly, an upstream seat may have a different outer diameter than a downstream seat, thereby creating an unbalanced seal with the gate. By increasing the sealing surface of the downstream gate/seat interface and by decreasing the sealing surface of the upstream gate/seat interface, the gate/seat interface may seal at lower pressures. A bidirectional seal is also disclosed that may prevent grease or sand from entering a cavity of the seat/pocket insert interface and assists with controlling the pressures and torque on the valve assembly.

Abstract: A liquid cooling system includes first and second coolant tubes and a coupler to couple the first coolant tube to the second coolant tube. The first coolant tube receives coolant liquid from a first element of the liquid cooling system. The second coolant tube provides the coolant liquid to a second element of the liquid cooling system. The coupler is configured to receive an electrical signal to constrict a flow of the coolant liquid.

Abstract: A novel valve device and related method of using that can provide for real-time pressure control adjustments and accurate meter reading when installed in a waterline. A two-stage pressure control system can comprise a dual-spring mechanism engineered for precise and adaptive water flow regulation. Water can enter the valve through the one or more inflow ports at an inlet end, travel through the body, and exit through the one or more outflow ports at an outlet end or through side windows in the valve body for certain embodiments. As a result, the dual-spring mechanism can generate backpressure. When water mixed with air flows through the waterline, the valve can create backpressure upstream causing the air at or near the meter to compress for a more accurate meter reading.

Abstract: A valve for controlling fluid flows, including a valve housing in which a control bore extends along a bore axis, in which a first valve member is moveably accommodated along the bore axis between a first open position and a first closed position for a first fluid channel and in which a second valve member is moveably accommodated along the bore axis between a second open position and a second closed position for a second fluid channel and further including a first drive assigned to the first valve member and a second drive assigned to the second valve member, in which a helical compression spring extends along the bore axis from the first valve member to the second valve member and has a central spring section with a central coil pitch which is at least virtually identical to a wire diameter of the compression spring.

Abstract: Valve module system for supplying compressed air to a compressed air consumer, in which valve modules can be provided with differently configured channel plates in order to enter into fluid communication with fluid channels of a carrier plate, with several connecting channels are formed, which are designed to connect a first valve connection and a second valve connection of a valve assembly to a channel opening of a fluid channel.

Abstract: Some fluid couplings, as described in this document, have an actuatable valve. In some examples, the actuatable valves provide an unobstructed flow path when switched to the “open” position and a closed flow path when switched to the “closed” position.

Abstract: A hydraulic control assembly includes means for holding pressure in a cylinder to inhibit boom or arm drop of a machine in the event that a hose between the cylinder and a main control valve (MCV) ruptures. The pressure holding means of the hydraulic control assembly include a hydraulic valve and a parts-in-body check assembly both configured for insertion into a valve cavity defined by a valve body. The hydraulic valve comprises a proportional piloted valve that controls pressure.

Abstract: Systems, apparatus, articles of manufacture, and methods for rotary bearing maintenance are disclosed. An example apparatus includes a valve body defining a fluid passageway; a flow control member in the fluid passageway; a drive shaft coupled to the flow control member, the drive shaft extending through a shaft bore defined in the valve body; and a bearing around at least a portion of the drive shaft. The bearing includes: a first layer including a first material having a first coefficient of friction with the drive shaft when the first material is in contact with the drive shaft; and a second layer including a second material having a second coefficient of friction with the drive shaft when the second material is in contact with the drive shaft, the second coefficient of friction greater than the first coefficient of friction.

Abstract: A transfer valve includes a housing. A spool is in the housing and includes a first control surface and a second control surface. A first cavity is formed by the housing and the first control surface. A second cavity is formed by the housing and the second control surface. A first control port connects to the first cavity. A second control port connects to the second cavity. A first centering port is axially between the first control port and the second control port. A second centering port is axially between the first centering port and the second control port. The spool closes the first centering port and the second centering port when in a centered position. The first centering port is connected to the first cavity or the second centering port is connected to the second cavity when the spool is not in the centered position.

Abstract: A solenoid proportional relief valve includes: a joint in which the flow path is disposed; a coil wound to be energized; a needle supported movably along an axial direction of the coil; and a stator generating an attraction force on the needle by excitation of the coil, the needle being formed into a bottomed cylinder having a wall portion and a bottom portion and configured as a biasing member accommodation space accommodating a biasing member in a state where a resilient force is generated in an inner cylindrical portion, an inner surface of the bottom portion being configured as a force receiving section for the biasing member, and the valve body being formed integrally with an outer surface of the bottom portion.

Abstract: A valve component utilized in a fluid end assembly of a reciprocating pump may contain a multi-piece construction. The valve component may include a valve body portion, a leg assembly portion, a sealing element, and an insert at least partially captured between the valve body portion and the leg assembly portion. The insert may be constructed from a carbide or a ceramic material, and, when the valve component is fully assembled, may be compressed between the valve body portion and the leg assembly portion. The insert may at least partially form the strike surface of the valve component. The valve body portion and the leg assembly portion may both be constructed from a metallic material, and the valve body portion may define a sealing seat. The sealing element may be constructed from an elastomeric material that may be pre-formed and then compression molded onto the seat of the valve body.

Abstract: A servovalve includes a fluid transfer valve assembly comprising a primary fluid supply port and a control port, a moveable valve spool arranged to regulate flow of fluid through a first fluid pathway from the primary fluid supply port to the control port, and a jet pipe assembly configured to axially move the spool relative to the fluid transfer valve assembly in response to a control signal to regulate the fluid flow along the first fluid pathway. The jet pipe assembly comprises a steerable nozzle from which fluid is directed to the ends of the spool in an amount determined by the control signal. The spool comprises an opening and an interior passage fluidly coupling the opening to the jet pipe assembly via a second fluid pathway. The first fluid pathway is fluidly isolated from the second fluid pathway within the spool.