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Title:
DIRECT-TOUCH TYPE METAL DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2007/026448
Kind Code:
A1
Abstract:
A direct-touch type metal diaphragm valve enabling a remarkable increase in the durability of a valve, i.e., the assured number of times of continuous opening and closing operations thereof under the condition that a proper flow coefficient Cv is maintained and a reduction in the change of the value of Cv with time by suppressing the deformation of a valve seat with time. In the metal diaphragm valve, a metal diaphragm is formed in a circular reverse pan shape formed of a laminate comprising multiple stainless steel sheets and multiple nickel-cobalt alloy sheets and swelled upward at its center part. The distance of 55 to 70% of the maximum swelled height Δh of the metal diaphragm is restricted to the maximum value stroke of the valve.

Inventors:
TANIKAWA, Tsuyoshi (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 5500012, JP)
谷川 毅 (〒12 大阪府大阪市西区立売堀2丁目3番2号 株式会社フジキン内 Osaka, 5500012, JP)
YAMAJI, Michio (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 5500012, JP)
山路 道雄 (〒12 大阪府大阪市西区立売堀2丁目3番2号 株式会社フジキン内 Osaka, 5500012, JP)
Application Number:
JP2006/309369
Publication Date:
March 08, 2007
Filing Date:
May 10, 2006
Export Citation:
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Assignee:
FUJIKIN INCORPORATED (3-2 Itachibori 2-chome, Nishi-ku Osaka-sh, Osaka 12, 5500012, JP)
株式会社フジキン (〒12 大阪府大阪市西区立売堀2丁目3番2号 Osaka, 5500012, JP)
TANIKAWA, Tsuyoshi (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 5500012, JP)
谷川 毅 (〒12 大阪府大阪市西区立売堀2丁目3番2号 株式会社フジキン内 Osaka, 5500012, JP)
YAMAJI, Michio (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 5500012, JP)
International Classes:
F16K7/12; F16J3/02
Foreign References:
JP2001525909A
JPH0580858A
JP2001289336A
JPH08105554A
JPH0526357A
JPH07317925A
JPH10148275A
US20030042459A1
Attorney, Agent or Firm:
SUGIMOTO, Takeo (Kitahama-Katano Bldg, 1-21 Kitahama 2-chome, Chuo-ku, Osaka-sh, Osaka 41, 5410041, JP)
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