A valve seat apparatus for use with fluid valves is described. An example disclosed valve seat apparatus includes a seat ring having an outer surface that includes a first annular recess at a first end of the seat ring, where the first annular recess is to receive a portion of a cage, a second annular recess proximate a second end of the seat ring opposite the first end, and where the second annular recess defines a groove in the outer surface of the seat ring, and a third annular recess adjacent the second annular recess. The example disclosed valve seat apparatus also includes a first seal assembly disposed in the third annular recess and a retainer disposed in the second annular recess to retain the seal assembly in the third annular recess.

In one aspect, a pressure regulating valve assembly is provided. The valve assembly includes a housing having a fluid inlet and a fluid outlet, a sleeve positioned within the housing, and a spool at least partially positioned within the sleeve. The spool includes an outer surface having a shoulder, and the spool is configured to translate within the sleeve between a closed position and an open position. The valve assembly further includes a cap coupled to the sleeve and surrounding at least a portion of the spool, and the cap includes an inner surface with a flange extending therefrom. In the closed position the spool shoulder abuts against the cap flange to define a sealed metering edge. In the open position the spool shoulder is spaced from the cap flange to unseal the metering edge and define a metering window to facilitate fluid flow therethrough to the fluid outlet.

A first flow path area at a position where one of multiple openings of a sleeve and one of multiple grooves of a spool overlap with each other is different in size from a second flow path area at a position where another one of the openings of the sleeve and another one of the grooves of the spool overlap with each other. The one opening and the one groove form a flow path for connecting one of one pressure chamber and the other pressure chamber to a fluid supply source, due to displacement of the spool. The other opening and the other groove form a flow path for connecting another one of the other pressure chamber and the one pressure chamber to a fluid discharge port, due to the displacement of the spool.

A rotary-type valve device includes: a tubular valve having an inner passage and opening parts opened in an outer circumferential wall from the inner passage toward an outward side in a radial direction; a housing accommodating the valve and turnably supports the valve; a tubular passage member assembled in the housing such that the passage member abuts on the outer circumferential wall of the valve and defining a radial-direction passage; and a biasing spring biasing the passage member toward the outer circumferential wall The passage member includes an abutting member abutting on the outer circumferential wall, and an intervening member having an annular pressing part intervening between the abutting member and the biasing spring and partially pressurizing the abutting member. The abutting member includes an annular sealing surface aligned with the annular pressing part in a biasing direction of the biasing spring.

A choke may include an inlet for receiving a flow stream. The choke may also include a valve assembly configured to receive the flow stream from the inlet and control the flow stream. The valve assembly may include a cage element, an external sleeve adapted for selectively and controllably articulating over the cage element to control the flow stream through the valve, and an impact screen surrounding both the cage element and the external sleeve and adapted to protect the cage element and the external sleeve from impacts from large objects in the flow stream. The choke may also include an outlet for delivering the flow stream from the valve assembly.

A valve assembly includes a valve housing having a first port, a second port, and a third port. A valve member within the valve housing is moveable therein to alter fluid communication between the first and second ports. The valve housing includes a first annular groove such that a first sealing ring is provided in the first annular groove, thereby sealing the first port from the second port when installed in a receiving bore. The valve housing also includes a second annular groove such that a second sealing ring is provided in the second annular groove, thereby sealing the second port from the third port in the receiving bore. The valve housing also includes a first anti-tip flange extending radially outward to a greater extent than the first annular groove and a second anti-tip flange extending radially outward to a greater extent than the second annular groove.

A solenoid actuator is mountable to a mounting surface of an engine, such that an accommodated portion is inserted into the engine, and an exposed portion is located outside the engine. An operating portion operates when a solenoid actuator portion is energized and de-energized. A main body forms at least a part of an outer shell of the exposed portion. A connector portion is projected from the main body in the exposed portion. The connector portion is connected with a wiring for the solenoid actuator portion. At least one protrusion is projected radially outward from a sidewall of the main body in the exposed portion. The at least one protrusion is located at a position different from the connector portion in a circumferential direction of the sidewall. The at least one protrusion forms a clearance with the mounting surface in an axial direction.

A core for casting a valve housing includes at least one first core part which is additively produced, and at least one second core part which is produced without using additive production. The at least one first core part represents at least one pressure chamber or at least one pressure medium channel of the housing which is configured to provide a fluidic connection of a pressure medium source to a pressure medium consumer when the housing is formed using the core. At least one frame-shaped core holder is formed by a first of the at least one second core part when the housing is formed using the core.

A hydraulic pressure control valve is equipped to a cavity to control a communication state between a supply port and an outlet port to supply hydraulic fluid from the supply port through the outlet port to a controlled object. A tubular sleeve has a first port and a second port communicating with the supply port and the outlet port, respectively. A spool includes a land supported by the sleeve slidably in an axial direction to form a hydraulic chamber with an inner circumferential periphery of the sleeve. The spool is displaced in the axial direction to cause the land to control a communication state between the first port and the second port through the hydraulic chamber. A supply-side hydraulic passage is connected with the hydraulic chamber through multiple outflow holes to conduct hydraulic fluid from the hydraulic chamber through the second port to the outlet port.

A directional control valve, comprising: a valve body having a bore to receive a spool; a spool mounted in said bore; at least one stopper mounted in said bore, said stopper being axially adjustable and fixable at a selected axial position. The provision of an axially adjustable stopper eliminates the need to select a suitably sized stopper from a selection of stoppers or to grind down (resize) a single stopper. It reduces the number of parts in the valve (thus reducing cost) and it also shortens the calibration time for the valve as there is no need to remove the stopper from inside the bore in order to perform an adjustment. As the valve is tested after each adjustment, this also means not removing the stopper and breaking the seal (draining the valve) between each testing phase. The calibration can therefore be performed much more efficiently.