Title:
ボールバルブ
Document Type and Number:
Japanese Patent JP6454570
Kind Code:
B2
Abstract:
To obtain, even in a non-turbulent state, a capacity coefficient substantially the same as in a turbulent state, the downstream end of a wall surface of a flow rate characteristic window is the narrowest part in a flow channel of a valve main body and a through flow channel of a ball valve body and the wall surface of the flow channel between the narrowest part and the upstream end of the wall surface of the flow rate characteristic window is formed as a tapered surface tapered toward the smallest diameter part so that the flow channel is widened suddenly from the narrowest part of the flow rate characteristic window to the through flow channel.
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Inventors:
Nomaguchi Keno
Furuya Motohiro
Shintani Tomoki
Furuya Motohiro
Shintani Tomoki
Application Number:
JP2015045533A
Publication Date:
January 16, 2019
Filing Date:
March 09, 2015
Export Citation:
Assignee:
Azbil Co., Ltd.
International Classes:
F16K5/06; F16K5/10
Domestic Patent References:
| JP5099392A | ||||
| JP45028156B1 | ||||
| JP4321885A | ||||
| JP2003113948A | ||||
| JP2001153238A |
Foreign References:
| US20060185740 | ||||
| US9016140 | ||||
| US3883113 |
Other References:
豊倉 富太郎・亀本 喬司,”流体力学”,実教出版株式会社,1986年 3月20日,第10刷,P.44-47
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa