Title:
BALL VALVE
Document Type and Number:
WIPO Patent Application WO/2018/181532
Kind Code:
A1
Abstract:
Provided is a ball valve configured to prevent foreign substances from occurring within the ball valve and also to prevent fluid from stagnating within the ball valve. This ball valve is provided with a flow rate regulation seat (4) located inside a valve chamber (13) at a position close to a second flow passage (12) and configured to adjust the flow rate of fluid flowing through a first flow passage (11) and the second flow passage (12). The flow rate regulation seat (14) is provided with an annular seat section (42) and a flow rate regulation section (44) which is located on the inner peripheral side of the seat section (42). The seat section (42) is provided with a seal surface (43) on which a ball valve body (2) slides and which seals fluid. The flow rate regulation section (44) is provided with: a flow rate regulation opening (46) for providing communication between the second flow passage (12) and the valve chamber (13); and a guide surface (47) continuously connected to the seal surface (43) and configured to separate from the ball valve body (2) and to guide fluid. The gap between the guide surface (47) and the ball valve body (2) continuously increases from the outer peripheral edge of the guide surface (47) toward a flow passage axis.
Inventors:
SETO HIROSHIGE (JP)
Application Number:
PCT/JP2018/012887
Publication Date:
October 04, 2018
Filing Date:
March 28, 2018
Export Citation:
Assignee:
ASAHI YUKIZAI CORP (JP)
International Classes:
F16K5/06
Foreign References:
| JPS483161Y1 | 1973-01-26 | |||
| US20130313457A1 | 2013-11-28 | |||
| JPS63129776U | 1988-08-24 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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