公开(公告)号：US20230383853A1

公开(公告)日：2023-11-30

申请号：US18142450

申请日：2023-05-02

Applicant: CKD CORPORATION

Inventor： Hiroyuki MURASE ,  Atsushi TSUNEDUKA ,  Mayuko OKADA

IPC: F16K7/17 ,  F16K31/122

CPC classification number: F16K7/17 ,  F16K31/1221 ,  B23K26/21

Abstract: A fluid control valve includes a diaphragm assembly including a shaft member joined to an end of a drive shaft on the side near an annular valve seat, a membrane member made of perfluoro alkoxy alkane and located in surface contact with the end face of the shaft member on the opposite side to the end joined to the drive shaft, and a weld part formed by laser welding at the interface between the shaft member and the membrane member to join the shaft member and the membrane member. The shaft member is made of fluorine resin with carbon-based additive dispersed.