公开(公告)号：US11118690B2

公开(公告)日：2021-09-14

申请号：US16309051

申请日：2017-06-19

Applicant: CKD CORPORATION

Inventor： Tatsushi Nabei ,  Michio Miyashita ,  Shinji Ishikawa ,  Fumihito Tsuchiya

IPC: F16K1/36 ,  F16K31/122 ,  F16K41/12

Abstract: A fluid control valve and manufacturing method thereof, wherein, when a pressing force acts on the engagement surface between a diaphragm member and a valve seat-contacting member, the valve seat-contacting member is not displaced and no gap is formed. The diaphragm member made of a first fluorine-based resin material is provided with a diaphragm membrane and a rod-shaped part in the center of the diaphragm membrane. The valve seat-contacting member made of an injection-moldable second fluorine-based resin material is provided with a ring-shaped sealing surface and a recess on the opposite side from the ring-shaped sealing surface. The rod-shaped part is partly fitted into the recess. A ring-shaped recessed is formed on outer circumference of a portion of the rod-shaped part. A small diameter recess is formed on the inner circumference of the recess. The ring-shaped recess section and the small diameter recess adhere closely to form the engagement surface.