An electronic expansion valve includes the valve needle screw assembly which also includes an outer edge guide section, the electronic expansion valve includes an inner edge guide section matched with the outer edge guide section, in the process of the action of the valve needle of the electronic expansion valve, the outer edge guide section of the valve needle screw assembly is matched with the inner edge guide section of the electronic expansion valve, to provide the guide for the valve needle, relatively reducing the deviation of the valve needle relative to the valve port, thereby reducing the eccentric wear of the valve needle.

A mixing valve for a water heater appliance includes a valve body that defines a mixing chamber, the mixing chamber being in fluid communication with a cold water inlet conduit and a hot water inlet conduit. A plunger valve is mounted within the valve body and is moveable along a translation axis to regulate a flow of water from the hot water inlet conduit and the cold water inlet conduit. A controller periodically initiates a cleaning cycle wherein the plunger valve is moved through a full range of motion (e.g., full hot to full cold). The cleaning cycle may only be performed if there is no water flowing through the mixing valve, e.g., as determined by temperature sensor measurements.

A mixing valve for a water heater appliance includes a valve body that defines a mixing chamber, the mixing chamber being in fluid communication with a cold water inlet conduit and a hot water inlet conduit. A plunger valve is mounted within the valve body and is moveable along a translation axis to regulate a flow of water from the hot water inlet conduit and the cold water inlet conduit. A controller periodically initiates a cleaning cycle wherein the plunger valve is moved through a full range of motion (e.g., full hot to full cold). The cleaning cycle may only be performed if there is no water flowing through the mixing valve, e.g., as determined by temperature sensor measurements.

A hydraulic valve unit includes a main oil passage configured to bring a side of a master cylinder and a side of a slave cylinder to communicate with each other, and a bypass oil passage configured to bypass a valve mechanism of the main oil passage, wherein the main oil passage and a main section of the bypass oil passage are disposed to be arranged with respective axes aligned with each other, and the main section of the bypass oil passage is disposed at the same height as the main oil passage or at a position higher than that of the main oil passage in a state in which a valve body is attached at a predetermined attachment position.

An assembly is provided for a turbine engine with an axial centerline. This assembly includes a turbine engine structure and a valve assembly. The turbine engine structure includes an outer duct wall, an inner duct wall, a first flow path and a second flow path. The inner duct wall is radially inward of the outer duct wall. The first flow path is radially inward of the inner duct wall. The second flow path is radially outward of the inner duct wall and is radially inward of the outer duct wall. The valve assembly includes a valve element and a valve actuator. The valve element is configured to regulate flow of fluid between the first flow path and the second flow path. The valve actuator is configured to move the valve element. The valve actuator is positioned entirely radially outward of the outer duct wall.

A torque transfer arrangement for a butterfly valve includes a crank having a tubular portion with an outer radial surface and an inner radial surface defining a cylindrical bore about a first axis. The tubular portion has two openings connecting the outer surface with the inner surface. A shaft is sized and configured to fit within the cylindrical bore and aligned with the first axis. A hole formed therethrough is substantially perpendicular to the first axis. A tapered pin is sized and configured to snuggly engage within the two openings and the hole. A butterfly valve and method are also disclosed.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. These apparatuses for controlling gas flow frequently rely on flow restrictors which can provide a known flow impedance of the process gas. In one embodiment, a flow restrictor is disclosed, the flow restrictor constructed of a plurality of layers, one or more of the layers having a flow passage therein that extends from a first aperture at a first end of the flow restrictor to a second aperture at a second end of the flow restrictor.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. These apparatuses for controlling gas flow frequently rely on flow restrictors which can provide a known flow impedance of the process gas. In one embodiment, a flow restrictor is disclosed, the flow restrictor constructed of a plurality of layers, one or more of the layers having a flow passage therein that extends from a first aperture at a first end of the flow restrictor to a second aperture at a second end of the flow restrictor.

Example fluid valves having non-circular flow passageways are disclosed. An example fluid valve includes a body defining a fluid passageway between an inlet and an outlet, at least a portion of the fluid passageway between the inlet and the outlet has a generally non-circular cross-sectional shape when taken along a plane transverse to a direction of fluid flow, the cross-sectional shape includes a curved central axis, with outwardly curved end walls and curved lateral walls joining the curved end walls.

Example fluid valves having non-circular flow passageways are disclosed. An example fluid valve includes a body defining a fluid passageway between an inlet and an outlet, at least a portion of the fluid passageway between the inlet and the outlet has a generally non-circular cross-sectional shape when taken along a plane transverse to a direction of fluid flow, the cross-sectional shape includes a curved central axis, with outwardly curved end walls and curved lateral walls joining the curved end walls.