Title:
DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2010/058726
Kind Code:
A1
Abstract:
Disclosed is a diaphragm valve capable of handling an ultra-high temperature environment, improving external leak performance and reliability, and contributing to the implementation of emission-free.
The valve is equipped with: a valve body (11) in which an inflow passage (11a) and an outflow passage (11b) for a pressure gas are formed; a first diaphragm (12) arranged opposing a valve seat (11c) formed at the exit of the inflow passage (11a); a stem (13) one end of which is arranged opposing the valve seat (11c) with the first diaphragm (12) interposed therebetween; a bonnet (14) that slidably holds the stem (13); a second diaphragm (15) arranged opposing the other end of the stem (13); an operating gas chamber (16) that is formed at the back side of the second diaphragm (15) and that changes internal pressure to cause the stem (13) to slide, opening/closing the valve seat (11c) by means of the first diaphragm (12); and a vent chamber (17) that is isolated from each flow passage (11a, 11b) and the operating gas chamber (16) by means of the first and second diaphragms (12, 15).
Inventors:
CHIBA YASUHIRO (JP)
YAMAMOTO KOHEI (JP)
YAMAMOTO KOHEI (JP)
Application Number:
PCT/JP2009/069195
Publication Date:
May 27, 2010
Filing Date:
November 11, 2009
Export Citation:
Assignee:
HAM LET MOTOYAMA JAPAN LTD (JP)
CHIBA YASUHIRO (JP)
YAMAMOTO KOHEI (JP)
CHIBA YASUHIRO (JP)
YAMAMOTO KOHEI (JP)
International Classes:
F16K7/17; F16K31/165
Domestic Patent References:
| WO2006073132A1 | 2006-07-13 |
Foreign References:
| US5829472A | 1998-11-03 | |||
| JPS5597567A | 1980-07-24 | |||
| JPS5038829U | 1975-04-22 | |||
| JP2007534893A | 2007-11-29 |
Attorney, Agent or Firm:
FUKUMORI, Hisao (JP)
Hisao Fukumori (JP)
Hisao Fukumori (JP)
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