A system may comprise a sensor configured to measure a characteristic of an engine component. A valve assembly may have an airflow outlet in fluid communication with the engine component. The valve assembly may include a first valve. A first valve control device may be coupled to the first valve and configured to control the first valve based on a measurement by the sensor. A second valve may be in fluidic series with the first valve. A second valve control device may be coupled to the second valve and configured to control the second valve based on the measurement by the sensor.

A solenoid for a bleed valve includes a solenoid body with an actuation fluid passage, a bleed valve passage, and a drive fluid chamber. A main armature is disposed within the solenoid body and is movable between open and closed positions, the actuation fluid passage being in fluid communication with the control outlet in the open position, the actuation fluid passage being fluidly isolated from the bleed valve passage in the second position. A pilot armature is disposed within the solenoid body, is movable relative to the main armature, and is operably coupled to the main armature by the drive fluid chamber to move the main armature between the open and closed positions by controlling issue of a drive fluid into and out of the drive fluid chamber.

A solenoid for a bleed valve includes a solenoid body with an actuation fluid passage, a bleed valve passage, and a drive fluid chamber. A main armature is disposed within the solenoid body and is movable between open and closed positions, the actuation fluid passage being in fluid communication with the control outlet in the open position, the actuation fluid passage being fluidly isolated from the bleed valve passage in the second position. A pilot armature is disposed within the solenoid body, is movable relative to the main armature, and is operably coupled to the main armature by the drive fluid chamber to move the main armature between the open and closed positions by controlling issue of a drive fluid into and out of the drive fluid chamber.

A six-way directional valve (100), an outdoor unit (1000) having the same and an air conditioner are provided. The six-way directional valve (100) includes: a valve body (1), defining a valve cavity (5) therein, the valve cavity (5) having a first side wall (11) and a second side wall (12) disposed oppositely to each other, the valve body (1) being provided with a first connecting pipe (A) to a sixth connecting pipe (F); a valve spool (2), movably disposed in the valve cavity (5), a first chamber (21) being defined between the valve spool (2) and the first side wall (11), a second chamber (22) being defined between the valve spool (2) and the second side wall (12), and a third chamber (23) being defined between the valve spool (2), the first side wall (11) and the second side wall (12); and a pilot valve assembly (4).

Provided is a valve device which can precisely adjust the flow rate while ensuring the flow rate of the fluid. A valve device includes a main actuator which receives a pressure of a supplied drive fluid and moves an operating member to an open position or closed position; an adjusting actuator arranged to receive at least a part of a force generated by the main actuator and for adjusting the position of the operating member positioned at the open position; and a pressure regulator provided in a feed path of the drive fluid to the main actuator and for regulating the pressure of the supplied drive fluid to suppress fluctuation of the pressure of the drive fluid supplied to the main actuator.

Provided is a valve device which can precisely adjust the flow rate while ensuring the flow rate of the fluid. A valve device includes a main actuator which receives a pressure of a supplied drive fluid and moves an operating member to an open position or closed position; an adjusting actuator arranged to receive at least a part of a force generated by the main actuator and for adjusting the position of the operating member positioned at the open position; and a pressure regulator provided in a feed path of the drive fluid to the main actuator and for regulating the pressure of the supplied drive fluid to suppress fluctuation of the pressure of the drive fluid supplied to the main actuator.

A lubrication pumping system for an oil lubricated engine is provided that includes a pump with an outlet and inlet. A relief valve is included having a housing with a multidimensional bore having a first diameter section axially intersecting with a second different diameter section. Slidably mounted in the first section is a spring biased primary piston have a first landing for metering flow between a pump discharge connection and a pump inlet connection. A secondary piston is provided in a second different diameter section of the valve housing bore. The inventive system allows for multiple modes of operation of oil pressure versus engine speed relationships by control of the pilot pressure to minimize parasitic loads exerted by the oil pump on the vehicle engine.

An electromagnetic and pilot-operated proportional valve with a valve slide unit (12) mounted in a valve housing (10) so as to be movable along an axial direction, which unit can be driven by an electromagnetic actuator assembly (16) provided at one axial end for the pilot-operated opening of a useful fluid inlet and/or outlet (24) of the valve housing as a response to energisation of a stationary coil (20) of the actuator assembly and interacts with mechanical force storage means (48, 50), more particularly is held in an unenergised stable axial position in the valve housing by said means, wherein the valve slide unit having a closure section (22) extending radially from one body section (30) of the valve slide unit (12) for sealing interaction with the useful fluid inlet or outlet (24) formed on a circumferential inner wall of the housing (10) interacts axially at one end, by means of the preferably cylindrical and/or coaxially extending body section (22), with a stationary guide section (40) of the valve housing to form an axial sliding bearing (62) and, at the other end, is mounted with radial play (56), wherein preferably ring-shaped sealing means (32) seal a circumferential section of the body section with radial play to the circumferential inner wall of the valve housing.

An electromagnetic and pilot-operated proportional valve with a valve slide unit (12) mounted in a valve housing (10) so as to be movable along an axial direction, which unit can be driven by an electromagnetic actuator assembly (16) provided at one axial end for the pilot-operated opening of a useful fluid inlet and/or outlet (24) of the valve housing as a response to energisation of a stationary coil (20) of the actuator assembly and interacts with mechanical force storage means (48, 50), more particularly is held in an unenergised stable axial position in the valve housing by said means, wherein the valve slide unit having a closure section (22) extending radially from one body section (30) of the valve slide unit (12) for sealing interaction with the useful fluid inlet or outlet (24) formed on a circumferential inner wall of the housing (10) interacts axially at one end, by means of the preferably cylindrical and/or coaxially extending body section (22), with a stationary guide section (40) of the valve housing to form an axial sliding bearing (62) and, at the other end, is mounted with radial play (56), wherein preferably ring-shaped sealing means (32) seal a circumferential section of the body section with radial play to the circumferential inner wall of the valve housing.

A microchannel heat exchanger is configured for use as an evaporator in a fluid cooling system and includes an inlet header, an outlet header, and a plurality of microchannel tubes extending between and in fluid communication with the inlet header and the outlet header. A microvalve actuated hybrid spool valve is attached to and in fluid communication with the inlet header.