FLOW CONTROL VALVE WITH COATING LAYER FOR IMPROVING SEALING PROPERTY

摘要

PURPOSE: A coating layer is formed to cover inner circumference of a body and a portion of a flange to improve sealing property. CONSTITUTION: A disk(11) is attached or detached to/from a body(13) by an opening member. A coating layer(14) is formed in inner circumference of the body. A first groove(13d) is formed to support a protrusion(14a). A second groove(13e) is formed in a first and second flange(13a,13b) of the body. The protrusion of the coating layer and the outer circumference portion(11a) of the disk are contacted.