A control valve includes a housing, a valve body arranged in a valve chamber of the housing, and a support portion slidably supporting an outer surface of the valve body in the valve chamber. The valve body is slidable on the support portion between an open position at which an outlet port is open and a closed position at which a seat surface of the valve body closes the outlet port. The valve body includes a skin layer forming the outer surface of the valve body, and a core layer under the skin layer. The outer surface of the valve body, other than the seat surface and a slidable area, includes a core exposed portion where the core layer is exposed without being covered with the skin layer.

A valve assembly includes a valve body with an interior cavity and one or more supply ports, a control port, and an exhaust port each fluidly connected to the interior cavity. An armature assembly is movable within the interior cavity from a first position to a second position in response to the coil being energized. In some configurations, a regulator body, which is connected to the valve body, has an exhaust passage fluidly connected to the exhaust port. A regulator valve in the regulator body prevents fluid flow out of the exhaust passage when fluid pressure on the regulator valve is at or below a pilot pressure. The regulator valve permits fluid flow out of the exhaust passage when fluid pressure on the regulator valve is greater than the pilot pressure. The valve body is configured to provide fluid from the supply port/ports to the control port.

In a flow path switching valve, when a valve rod is shifted toward a first back pressure chamber, a first valve chamber is separated from the first back pressure chamber by a first valve element, and a second valve chamber is separated from an intermediate chamber by a second valve element. When the valve rod is shifted toward a second back pressure chamber, the first valve chamber is separated from the intermediate chamber by the first valve element, and the second valve chamber is separated from the second back pressure chamber by the second valve element. The valve rod has a pressure equalizing path through which the first back pressure chamber and the second back pressure chamber are connected.

A valve actuator includes moving equipment arranged to cause a plug of said equipment to slide along a given axis between two end positions. The moving equipment includes a core constrained to move in translation with the plug along the given axis. The actuator also includes a coil lying between two rings of ferromagnetic material, all three of which are secured to a frame of the actuator so as to surround the core, which itself carries two magnets mounted in opposition on the core level with the coil, a ring of ferromagnetic material lying between the two magnets that also lie between two other rings of ferromagnetic material. A valve and a machine may be fitted with such an actuator.

Disclosed is a solenoid valve which is installed in a bore of a modulator block having a first hydraulic port and a second hydraulic port to control a flow of a braking fluid. The solenoid valve can reduce the number of components by integrating the components and implement a check valve function.

A multi-way valve includes a control pressure channel, first and second control fluid channels, a valve body in the first and second control fluid channels, and an electrically controlled device having a drive member and an armature. The armature moves back and forth by the drive member between inactive and active positions. Movement of the armature from the inactive to the active position displaces the valve body arrangement to an active position, closing the first and opening the second control fluid channel is open. The electrically controlled device includes a drive body connected to the armature and a first spring member between the armature and the drive body. The valve body arrangement is biased towards the inactive position by a second spring member. The armature in the inactive position is biased towards the active position by a third spring member. Also disclosed is an actuator including the valve.

A poppet switch valve device includes a valve body, a first valve rod including a first valve member, a second valve rod including a second valve member, and a solenoid. When a jig engages with an engagement portion of the first valve rod and rotates the first valve rod so that an internally-threaded hole formed in the first valve rod engages with and moves forward and backward relative to an external thread formed on an outer circumferential surface of the second valve rod, the first valve rod is moved relative to the second valve rod in the axial direction. The poppet switch valve device further includes a restriction portion configured to restrict movement of the first valve rod relative to the second valve rod in the axial direction after the first valve rod is moved relative to the second valve rod in the axial direction using the jig.

A seat valve with electromagnetic actuation combines, in one device, the functions of a seat valve, of a pressure-limiting valve and optionally also of one or more check valves. Furthermore, the switching noise of the seat valve function is reduced. In a de-energized state of an electromagnet, a fluid flow from a port P to a port TNC occurs only if a pressure difference between the ports P and TNC exceeds a limit value of p.sub.G, wherein the force of the specified pressure difference overcomes the force of a spring and therefore pushes a first sealing body out of a first sealing seat, and in the energized state of the electromagnet, a fluid flow from port P to port TNC occurs even in the case of a pressure difference less than p.sub.G if the force of the electromagnet together with the force of the pressure difference between the ports P and TNC overcomes the force of the spring, wherein the sum of the specified forces pushes the first sealing body out of the first sealing seat. The seat valve may be used in hydraulic brake systems of vehicles, also in vehicle gear mechanisms or in hydraulic drives.

A fuel flow valve, for example for use in supplying fuel to a gas turbine engine. Example embodiments disclosed include a staging fuel valve (300), comprising: a valve housing (301) having first and second fuel inlets (306, 307) and first and second fuel outlets (305, 308); a piston (302) slidably mounted within a chamber (303) in the valve housing (301) and being moveable between a first position in which the first inlet (306) is in fluid communication with the first outlet (305) while the second inlet (307) and second outlet (308) are blocked, and a second position in which the second inlet (307) is in fluid communication with the second outlet (308). The piston (302) comprises a magnet assembly (312) and the valve housing (301) comprises a coil (313) arranged to provide, when energised, a magnetic force to actuate the piston (302) between the first and second positions.

A solenoid valve system includes a valve body defining porting for a fluid flow through the valve body, and first and second solenoid valve components attached oppositely to the valve body. Each valve component includes an electromagnetically driven armature with a poppet that moves between a closed position and an open position. The porting defined by the valve body includes first side porting, second side porting, and common porting in fluid communication with an internal common chamber defined by the valve body. When a respective poppet is in the closed position, flow of fluid is blocked between the respective side porting and the common porting, and when the respective poppet is in the open position the poppet permits a flow of fluid between the respective side porting and the common porting through the common chamber. Such configuration enhances carryover performance (reduces carryover time) while maintaining a compact footprint.