Expansion valve

An expansion valve comprising:

• a body that forms a refrigerant flow passage;
• a valve element that is configured to adjust an opening degree of the refrigerant flow passage;
• a rotor that is configured to drive the valve element;
• an electric circuit board that is configured to control rotation of the rotor;
• a partition member that is shaped in a cylindrical tubular form and is fixed to the body, wherein the partition member receives the rotor;
• a case that is placed at an outside of the partition member and receives the electric circuit board, wherein the case has a cylindrical tubular portion that is coaxial with the partition member;
• an O-ring that is placed between the cylindrical tubular portion and the partition member and is configured to limit intrusion of a liquid into an inside of the case;
• a bracket that has:
• a body-side portion that extends in a direction parallel to an axial direction of the partition member and is securely fastened to the body;
• and
• a case-side portion that extends in a direction different from the axial direction of the partition member and is installed to the case;
• and
• a fastener member that is configured to securely fasten the bracket to the body through the body-side portion, wherein:
• 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.