Title:
安全弁並びにそれに用いるノズル及びジスク
Document Type and Number:
Japanese Patent JP6955890
Kind Code:
B2
Abstract:
To provide a safety valve which prevents a setting pressure at which the safety valve is operated from fluctuating even if the safety valve is exposed to a high temperature steam atmosphere for a long time, and to provide a valve seat and a valve body used in the safety valve.SOLUTION: The above object is achieved by a nozzle or a disc that is characterized in that a seal surface of the nozzle or the disc in a safety valve is formed of a material which prevents iron oxide from growing in an oxidative atmosphere. Alternatively, the above object is achieved by a device which is a control valve, a pressure reduction valve, or another device used under steam or another oxidative atmosphere and which is characterized in that a valve seat part, a guide part, and other portions which are functionally deteriorated by growth of an oxide film are formed of a material that prevents iron oxide from growing.SELECTED DRAWING: Figure 1
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Inventors:
Osamu Uchizawa
Jiro Sanui
Takehiko Aoki
Jiro Sanui
Takehiko Aoki
Application Number:
JP2017083232A
Publication Date:
October 27, 2021
Filing Date:
April 19, 2017
Export Citation:
Assignee:
Motoyama Manufacturing Co., Ltd.
International Classes:
F16K25/00; C23C8/18; F16K51/00
Domestic Patent References:
| JP50032813Y1 | ||||
| JP55135275A | ||||
| JP2011190478A | ||||
| JP2013249824A | ||||
| JP6116632A | ||||
| JP2015158260A | ||||
| JP10008216A | ||||
| JP6221105A |
Foreign References:
| WO2000034702A1 |
Attorney, Agent or Firm:
Hisao Fukumori