Title:
DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2022/085289
Kind Code:
A1
Abstract:
Provided is a diaphragm valve with a seat holder having a low possibility that a seat is displaced during the operation of the valve. A diaphragm valve (1) comprises a body (10); a seat (20); a seat holder (30); a diaphragm (40); and a bonnet (60). The seat (20) has a step difference (21) in an upper-side outer peripheral portion. The seat holder (30) has a downwardly convex conical ring shape having a through hole (31), through which the seat (20) penetrates at the center, and is provided with a flow hole (32) in an inclined surface (36). An outer edge upper surface (33) of the seat holder (30) is brought into contact with an outer edge lower surface (34) of the diaphragm (40), and the outer edge lower surface (34) of the seat holder (30) is brought into contact with an outer edge surface (15) at the bottom of a recessed portion (13). The seat holder (30) is arranged so as to bring an inner edge lower surface (35) of the seat holder (30) into contact with a large-diameter-side upper surface (22) of the step difference (21) of the seat and to cause the bonnet (60) to press the seat (20) downward.
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Inventors:
ISHIBASHI KEISUKE (JP)
YAKUSHIJIN TADAYUKI (JP)
IPPOSHI TAKASHI (JP)
YOSHIDA TOSHIHIDE (JP)
YAKUSHIJIN TADAYUKI (JP)
IPPOSHI TAKASHI (JP)
YOSHIDA TOSHIHIDE (JP)
Application Number:
PCT/JP2021/030486
Publication Date:
April 28, 2022
Filing Date:
August 20, 2021
Export Citation:
Assignee:
FUJIKIN KK (JP)
International Classes:
F16K7/12
Foreign References:
| JP2019108920A | 2019-07-04 | |||
| US20110140014A1 | 2011-06-16 | |||
| KR20140105182A | 2014-09-01 |
Attorney, Agent or Firm:
MATSUMURA Naoto et al. (JP)
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