Abstract: An electric valve, comprising a nut assembly and a sleeve. The nut assembly comprises a plastic member and a connection portion; the sleeve comprises an opening portion; the connection portion comprises an upper end face portion; the opening portion is fixedly welded to the upper end face portion; and at least part of the upper end face portion is arranged at the outer side of the opening portion in a radial direction of the electric valve.

Abstract: An electric valve includes a nut assembly, a valve seat assembly, and a sleeve. The nut assembly includes a plastic part and a connecting portion fixed to each other; the connecting portion is made of metallic material; the sleeve is fixed to the connecting portion; the connecting portion includes a lower end face portion; the valve seat assembly includes a first end portion; the first end portion is made of metallic material; the first end portion is fixed to the lower end face portion by welding. The valve seat assembly cooperates with the connecting portion without machining an additional cooperating structure, thereby reducing the machining costs of the electric valve.