A solenoid valve has a valve portion and a solenoid portion. The valve portion includes a sleeve and a spool. The solenoid portion includes a yoke, a plunger, a stator core, and a base portion. The base portion includes a first inner diameter portion, a second inner diameter portion, and a connection surface that connects the first inner diameter portion and the second inner diameter portion to each other in a radial direction. The first inner diameter portion is fastened to a first outer peripheral surface of the sleeve. The second inner diameter portion is arranged radially outside a second outer peripheral surface of a magnetic attraction core. The base portion is in contact with the yoke. The connection surface and a sleeve end surface of the sleeve adjacent to the solenoid portion in the axial direction are spaced from each other in the axial direction.

A modular valve assembly can include a core spool module and a plurality of end connection modules. The end connection modules can be configured to be secured to the core spool module at one or more of a core inlet or a core outlet of the core spool module to provide one or more respective, different flow configurations for the modular valve assembly. The core spool module can include a bonnet portion that is integrally formed with the core inlet and the core outlet and a seat ring configured to provide a seal against flow of process fluid through the modular valve assembly.

A valve, having a valve housing, in which a housing interior is formed, in which a movable valve slide is located. The valve slide is impinged upon by a compression spring that is supported via a supporting element on the valve housing. The supporting element has a supporting wall, from which a plurality of supporting arms protrudes, which axially overlap the valve slide in each axial position. On the supporting arms guide surfaces are formed for linear guidance of the valve slide. The supporting arms are springily deflectable and in each case have a radial support surface, with which they are supported on the valve housing.

Disclosed is a spool valve to valve a fluid between at least one inlet port and at least one outlet port, having a bore with a spool operably associated therein. The bore has one or more inlet ports and at least one outlet port. Located in the bore is at least one in-bore seal, the seal fluidly sealing on a seal outer diameter to an inside diameter of the bore, and selectively fluidly sealing on a seal inside diameter to a spool outside diameter. Present also is at least one spacer located in the bore, adjacent the at least one in-bore seal having a fluid communication from a spacer internal diameter to a spacer external diameter with at least one inlet port, or the at least one outlet port. The spool moves to allow or prevent flow from an inlet port to outlet port.

An indicator adapted to provide a visual indication of an over pressure situation in a system. The indicator (also referred to as a pop indicator), includes a main body, a piston that is disposed in the main body, and one or more O-rings disposed around the piston. Initially, the piston is in a first position where the piston is retracted into the body. However, when an over pressure situation occurs, the pressure causes the piston to move in a direction out of the main body against a friction force created by the O-ring. When the piston is moved, i.e., popped, then end of the piston extending out of the body provides a visual indication.

A spool valve including a spool having a plurality of land portions; a sleeve having the spool housed such that the spool is movable in an axial direction and has an input port and an output port and small-diameter portions in the interior of the sleeve. The pressure and flow rate of a fluid passing between the land portions and the small-diameter portions are adjusted by movement of the spool; a plurality of adjustment portions formed as spaces between the small-diameter portions of the sleeve and the land portions of the spool overlapping with each other from a radial direction of the spool; and a guide portion constituted by the small-diameter portion and the land portion which define one of the adjustment portions having a cross-sectional area smaller than each of cross-sectional areas of adjacent two of the adjustment portions having the input port interposed therebetween in the axial direction.

A hydraulic oil control valve is coaxially disposed with a rotational axis of a valve timing adjustment device. The hydraulic oil control valve includes a sleeve and a spool that is slidably moved in an axial direction within the sleeve in a radial direction. The sleeve includes an inner sleeve disposed radially outside of the spool and an outer sleeve defining an axial hole extending in the axial direction. The inner sleeve is inserted into the axial hole. The outer sleeve is fixed to an end portion of one shaft when an axial force is applied to the outer sleeve in the axial direction. An inner sleeve end portion of the inner sleeve in the axial direction away from the actuator protrudes from the outer sleeve away from the actuator in the axial direction.

An inner subassembly for assembling a valve assembly includes a spool defining a central bore that extends axially through the spool forming a spool annular wall, and including a spool cone tip that is disposed at the first axial end, as well as a hydraulic activation ridge extending radially outwardly from the spool annular wall, and that is disposed axially between the second axial end and the first axial end. The spool may further define a first bypass bore. A stem defines a first flow bore that aligns with the first bypass bore.

The system utilizes fluid pressure achieved by increasing depth as a primary component for generation of energy. The system operates by varying its depth through changes in buoyancy. The ballast changes are controlled by electronics powered by a battery charged by a generator driven by a hydraulic system. Rather than utilizing a motor driven pump to generate pressure in the hydraulic system, a piston-like cylinder is applied pressure by the change in hydrostatic pressure as depth increases and draws fluid back into the cylinder as pressure decreases. As the system sinks, outside pressure forces hydraulic fluid to power a generator that charges a battery and powers a pump to deballast. As the system rises, the lowering of ambient pressure, and other internal forces, causes the hydraulic fluid to return to its initial state, where once the ballast begins to take in fluid, the whole process will continue to repeat.

A stability control augmentation system and method for a flight control surface of an aircraft. The system includes s an actuator operable for actuating the flight control surface, and a control valve comprising a spool and an integrated augmentation mechanism. The spool and the actuation mechanism are both moveable to open and close a fluid flow path through the control valve to control the actuator.