Title:
DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2024/057597
Kind Code:
A1
Abstract:
A diaphragm valve (1) comprises: a valve box (10) which has a first flow path (11), a second flow path (12), and a valve seat (15); a lid body (20) which is attached by screwing to the valve box (10); a valve rod (30) which is screwed to the lid body (20) so as to be movable up and down, and which can be rotatably operated; a stem (40) which is connected to the valve rod (30) and has a screw shaft (42) aligned with the valve rod (30); a holder (50) which is screwed to the screw shaft (42), and which comes into contact with and separates from the valve seat (15) to open and close the connection between the first flow path (11) and the second flow path (12); and an annular diaphragm (60) through which the screw shaft (42) is inserted. The outer circumferential portion (61) of the diaphragm (60) is mechanically fastened and fixed between the valve box (10) and the lid body (20), and the inner circumferential portion (62) of the diaphragm (60) is mechanically fastened and fixed between the stem (40) and the holder (50).
Inventors:
KANAI NAOYA (JP)
Application Number:
PCT/JP2023/014673
Publication Date:
March 21, 2024
Filing Date:
April 11, 2023
Export Citation:
Assignee:
IHARA SCIENCE CORP (JP)
International Classes:
F16K7/12; F16K7/16
Foreign References:
| JPH01116275U | 1989-08-04 | |||
| JP2001509579A | 2001-07-24 | |||
| JPH08114265A | 1996-05-07 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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