An electronic expansion valve according to the present application includes a housing component and a valve seat assembly, the valve seat assembly includes a first connecting pipe and a second connecting pipe which are in a same straight line; a main valve cavity is formed by the valve seat assembly, and an included angle formed between the main valve cavity and the first connecting pipe is an acute angle; wherein the valve seat assembly is of an integral structure and is fixed to the housing component by welding, and a preset distance exists between the first connecting pipe and an extension line of a welding position of the valve seat assembly and the housing component in a radial direction.

[Object] To provide an electric valve capable of restricting a phenomenon in which a melted brazing material rises along an outer periphery of a valve seat and an assembly method thereof.

[Solving Means] An electric valve includes: a valve shaft provided with a valve body; a valve seat provided with a valve seat portion with which the valve body comes into contact and from which the valve body separates; a valve main body having the valve seat fixed thereto by soldering; and a stepping motor with a rotor and a stator for elevating the valve shaft, in which a constricted portion is provided at an outer peripheral surface of a side surface of the valve seat.

An anti-free-flow valve for use with an enteral feeding or infusion pump is disclosed. The valve includes a first component connectable to a first tube and has a first cavity and a sealing element and a second component adapted to be connected to the first component and a second tube and having a second cavity, a valve seat and a flexible portion. The sealing element and the valve seat are sealingly engageable to control fluid flow between the first and second cavities. The valve is configured such that applying an axial tension force between the first and second components brings the valve into an open position. The second component's flexible portion includes a bellows which has a spring function in the axial direction and a housing at least partially covering the second component and configured to operate as a stop limiting the axial movement of the second component.

An expansion valve includes: a partition member shaped in a cylindrical tubular form and receiving a rotor; a case placed at an outside of the partition member and having a cylindrical tubular portion coaxial with the partition member; an O-ring placed between the cylindrical tubular portion and the partition member; a bracket having a body-side portion extending in a direction parallel to an axial direction of the partition member and securely fastened to a body, and a case-side portion extending in a direction different from the axial direction and installed to the case; and a fastener member securely fastening the bracket to the body through the body-side portion. The case and the bracket form an enabler structure that is configured to enable movement of the bracket relative to the case in a fastening direction in which the bracket is fastened to the body by the fastener member.

A stop valve, including: a valve tube, wherein two ends thereof are respectively an operating end and a plugging end, a side wall of the valve tube is provided with a first interface and a second interface, the second interface is close to the plugging end relative to the first interface, and a space between the second interface and the plugging end in the valve tube forms a buffer chamber; a base, used for plugging an opening of the plugging end; a sleeve ring, fixed in the cavity of the valve tube, the sleeve ring is provided with a valve port; and a valve core, disposed in the cavity of the valve tube, so as to close or open the valve port; and the valve tube and the base both are made of stainless steel.

A valve (1) comprising a first housing part (2) and a second housing part (3), the first housing part (2) and the second housing part (3) being made from a sheet metal material, and being joined by means of welding, preferably laser welding, to form a closed housing of the valve (1). An actuator (9) is arranged inside the housing for driving movements of a first valve member (7) and/or a second valve member (8), said actuator (9) being arranged directly in a flow of fluid flowing in the fluid flow path during operation of the valve (1). The valve (1) is hermetically sealed due to the welding of the housing parts (2, 3).

A method includes separately exposing selected portions of a first rigid substrate and a second rigid substrate to laser radiation, selectively etching the exposed portions of the first rigid substrate and the second rigid substrate using a chemical etchant and bonding the first rigid substrate to the second rigid substrate along a common interface to form a fluidic valve. The fluidic valve may be coupled to a fluidic haptics device, for example, which may be integrated into an artificial reality system.

An expansion valve includes: a partition member shaped in a cylindrical tubular form and receiving a rotor; a case placed at an outside of the partition member and having a cylindrical tubular portion coaxial with the partition member; an O-ring placed between the cylindrical tubular portion and the partition member; a bracket having a body-side portion extending in a direction parallel to an axial direction of the partition member and securely fastened to a body, and a case-side portion extending in a direction different from the axial direction and installed to the case; and a fastener member securely fastening the bracket to the body through the body-side portion. The case and the bracket form an enabler structure that is configured to enable movement of the bracket relative to the case in a fastening direction in which the bracket is fastened to the body by the fastener member.

A shut-off valve housing having a through-channel extending inside a main body between an inlet opening and an outlet opening, and a valve seat disposed inside the through-channel. To reduce flow losses, an outflow region of the through-channel immediately downstream of the valve seat on an outflow side has an inwardly curved contour.

A method of manufacturing a body of a fluid control apparatus using additive manufacturing, the method including forming an inner wall having an outside surface and an inside surface, an area surrounding an inlet, an area surrounding an outlet, and an area surrounding a fluid flow path, wherein the inner wall provides a fluid boundary and connects the inlet and the outlet. The method further including forming a portion of the inner wall that receives a valve seat, forming a portion of the inner wall that receives a control stem and a control element, and forming a lattice structure by depositing a solidifiable material onto the inner wall in a predetermined pattern, wherein the lattice structure is three-dimensional and includes a plurality of connected lattice members.