A valve assembly may comprise: a housing cap; a valve housing having an inlet port, an outlet port, and a pilot pressure inlet port, the inlet port disposed axially opposite the housing cap; a poppet defining an axial surface and a radially outer surface, the poppet including a first radial groove disposed in the radially outer surface; a first dynamic radial seal disposed in the first radial groove and in intimate contact with a radially inner surface of the valve housing, the first dynamic radial seal configured to maintain unobstructed contact with the radially inner surface of the valve housing in response to the poppet translating axially from an open position to a closed position.

A valve arrangement for use in a parking brake system of a commercial vehicle or trailer, includes a differential piston having a first section and a second section, wherein the second section has a smaller diameter compared to the first section, and wherein there is a fluidic connection between the first section and the second section. The arrangement includes a housing with a bore, in which the differential piston is adapted to move. The bore has at least two sections, wherein the first section corresponds to the diameter of the first section of the differential piston, and the second section corresponds to the diameter of the second section of the differential piston, and wherein a step is formed between the first section and second section of the bore. A first passage and a second passage are arranged and axially spaced in the bore, and a third passage is arranged in or next to the second section of the bore. When the differential piston is in a first end position, the second section of the differential piston rests against the step, and a connection of the first passage and the second passage within the bore is provided. When the differential piston is in a second end position, a connection of the first passage and the second passage within the bore is blocked.

A valve device for a heat-pump system, having an electrical actuator arranged in or on the valve-device housing a first valve body and a second valve body are arranged in the valve-device housing of the valve device, and a heat-pump-system having such a valve device, and to a building having such a heat-pump system or such a valve device.

A solenoid valve assembly has a valve body in which a spool is slidably mounted and operated by a solenoid having a coil. A manifold member has a plurality of flow paths for supplying and discharging pressurized fluid to and from ports of the solenoid valve assembly. An intermediate block is interposed between the valve body and the manifold member. The intermediate block has a plurality of through holes for connecting ports of the manifold member to ports on the valve body. At least one sensor is housed in the intermediate block for sensing at least one of pressure and flow in at least one of the through holes.

A system and method for computer data processing systems of cooling or heating a plurality of objects (heat sources), such as processors in a data center or the like, is disclosed with each of the objects having a control valve associated therewith. Each of the objects is in communication with a supply of a coolant fluid and each control valve has an inlet for receiving coolant fluid from its respective object which reflects the temperature of the object. The control valve has a chamber that receives coolant from its inlet and an outlet. A valve member within the chamber is movable in response to changes in temperature of the coolant fluid within the chamber between a closed position and an open position. The valve member is of a layers of dissimilar metal material having different coefficients of thermal expansion that changes shape in response to changes in temperature. The coolant is carbon dioxide (CO.sub.2) that is in its supercritical state as it passes through the heat sources.

A combined water heater and thermostatic control device that combines the functionality of a water heater, thermostat and shut off valve, and may be installed in various aircraft lavatory applications to facilitate installation, consolidate functions, and reduce the probability of leaks. The combined device may include a water tank assembly, a torque motor valve and servo valve assembly, and a shut-off valve assembly. The combined device may also include a temperature control unit that senses water temperature in a water tank assembly and may activate a water heater.

A hydraulic valve including a valve housing; and a valve piston that is axially movable in the valve housing along a first longitudinal axis of the valve housing, wherein the valve housing includes a supply connection for feeding a hydraulic fluid, at least one operating connection and at least one tank connection for draining the hydraulic fluid, wherein the valve piston is movable by an electromagnetic actuator of the hydraulic valve, wherein the valve housing forms a hydraulic portion and the actuator forms a magnet portion of the hydraulic valve, wherein a divider element is arranged between the hydraulic portion and the magnet portion, and wherein the divider element is configured to provide a flow connection between the hydraulic portion and the magnet portion and vice versa.

A fluid valve for a hydraulic circuit of an aircraft includes a valve body with an inlet and two outlets. The valve further includes a solenoid electric actuator with a ferromagnetic mobile driver and a valve member having a ferromagnetic portion/ The valve member is movable within the valve body along a main direction and has first and second ends that define first and second cavities, respectively, on opposite sides of the valve member. A longitudinal cavity extends through the valve member parallel to the main direction and opens into the second cavity. Relative displacement between the mobile driver and the valve member modifies a communication between the longitudinal cavity and the first cavity via a side opening that is perpendicular to the main direction.

A pilot device for a hydraulic directional valve includes a displacement sensor, a pilot valve, an actuating device, a coil assembly, and a circuit board. The displacement sensor has a sensor axis and the pilot valve has a valve axis. The valve axis and the sensor axis are arranged substantially parallel to one another so as to lie in a reference plane. The actuating device and the coil assembly are arranged adjacent to one another. The circuit board is arranged parallel to the reference plane. In each case, to establish an electrical contact, the coil assembly, the actuating device, and an electrical plug connection are either soldered directly to the circuit board or are in breakable electrical contact with a respectively associated, rigid contact assembly. The contact assembly is soldered directly to the circuit board.

A servo valve comprising: a fluid transfer valve assembly includes: a housing having channel therethrough fluidly connecting a supply port, a return port and a control port formed in the housing; a moveable valve spool located within the channel and arranged to regulate flow of fluid between the supply port, the return port and the control port in response to a control signal; and a drive assembly configured to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The valve spool comprises a first spool part and a second spool part and the drive assembly comprises a piezoelectric actuator positioned between the first and the second spool parts within the channel. Then when a control signal is applied to the piezoelectric actuator it causes extension or contraction of the first and second piezoelectric actuator elements.