Patent ID: 8292262

Claim:
A flow control valve comprising: a body having a fluid inlet and a fluid outlet; a cover attachable to the body; a motor disposed in a space defined by the body and the cover; at least two fixing members fixing the motor to the body; a valving element connected to a rotary shaft of the motor with a screw member; a slider that is raised and lowered along the rotary shaft of the motor; an urging member that urges the valving element toward a motor side or toward a valving element side opposite to the motor side; packing that physically separates the space into the motor side and the valving element side and prevents fluid communication between the valving element side and the motor side; and a discharge channel that discharges a fluid that has accumulated on a side closer to the valving element than to the packing, wherein, the packing is made of a material that does not permit passage of vaporized chemical solution between the valving element side and the motor side, the packing has a circular hole at a center part, an inner peripheral edge around the circular hole, and an outer peripheral edge, and the packing is fixed by the inner peripheral edge being interposed between the slider and the valving element, and by the outer peripheral edge being interposed between the at least two fixing members.