Flow control valve

A flow control valve comprising:

• a valve seat including a valve hole and a seat surface formed at an edge of the valve hole;
• a valve element formed with a sealing surface on an outer periphery corresponding to the seat surface;
• and
• a rotary shaft integrally provided with the valve element,
• the rotary shaft having a central axis being positioned eccentrically from a central axis of the valve hole in a radial direction of the valve hole, and the sealing surface being positioned eccentrically from the central axis of the rotary shaft toward an extending direction of a central axis of the valve element,
• wherein the flow control valve further comprises a valve-element moving direction restriction member configured to halt rotation of the valve element integrally rotatable with the rotary shaft about the central axis of the rotary shaft and thereafter relatively rotate the valve element about an eccentric axis positioned eccentrically from the central axis of the rotary shaft with respect to the rotary shaft rotatable about the central axis of the rotary shaft so that the valve element moves to the valve seat.