Title:
VALVE STRUCTURE FOR SHUT-OFF VALVE
Document Type and Number:
Japanese Patent JP2002310307
Kind Code:
A
Abstract:
To provide a valve structure for a shut-off valve having a small size and vacuum retaining capability.
The valve structure for the shut-off valve comprises an annular groove 33 circulated on one side face of a valve disc opposed to a valve seat and a seal member 34 fitted to the annular groove 33. The seal member 34 has a base and a swollen portion 206 molded integrally with the base. The swollen portion 206 has a fist recess 202 and a second recess 204 on the side of the base so that the swollen portion 206 is deflected to the side of second recess 204 and pressed against the valve seat during sealing of the seal member 34 to secure a wide shut-off plane.
Inventors:
WARATANI KENJI
SHIMODA HIROMI
SHIMODA HIROMI
Application Number:
JP2001115757A
Publication Date:
October 23, 2002
Filing Date:
April 13, 2001
Export Citation:
Assignee:
SMC CORP
International Classes:
F16K3/02; (IPC1-7): F16K3/02; F16J15/32
Domestic Patent References:
| JPH11336905A | 1999-12-07 | |||
| JPS4525830Y1 | 1970-10-07 | |||
| JPS6414960U | 1989-01-25 |
Foreign References:
| WO1999003132A1 | 1999-01-21 | |||
| WO1999013249A1 | 1999-03-18 | |||
| US4321225A | 1982-03-23 |
Attorney, Agent or Firm:
Takehiro Chiba (1 outside)