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 (JP)
YAMAJI MICHIO (JP)
YAKUSHIJIN TADAYUKI (JP)
FUKUCHI HIROSHI (JP)
YAMAJI MICHIO (JP)
YAKUSHIJIN TADAYUKI (JP)
FUKUCHI HIROSHI (JP)
Application Number:
PCT/JP2006/309369
Publication Date:
March 08, 2007
Filing Date:
May 10, 2006
Export Citation:
Assignee:
FUJIKIN KK (JP)
TANIKAWA TSUYOSHI (JP)
YAMAJI MICHIO (JP)
YAKUSHIJIN TADAYUKI (JP)
FUKUCHI HIROSHI (JP)
TANIKAWA TSUYOSHI (JP)
YAMAJI MICHIO (JP)
YAKUSHIJIN TADAYUKI (JP)
FUKUCHI HIROSHI (JP)
International Classes:
F16K7/12; F16J3/02
Foreign References:
| JP2001525909A | 2001-12-11 | |||
| JPH0580858A | 1993-04-02 | |||
| JP2001289336A | 2001-10-19 | |||
| JPH08105554A | 1996-04-23 | |||
| JPH0526357A | 1993-02-02 | |||
| JPH07317925A | 1995-12-08 | |||
| JPH10148275A | 1998-06-02 | |||
| US20030042459A1 | 2003-03-06 |
Attorney, Agent or Firm:
SUGIMOTO, Takeo (1-21 Kitahama 2-chome, Chuo-ku, Osaka-sh, Osaka 41, JP)
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