Title:
FLUID CONTROLLER
Document Type and Number:
Japanese Patent JP3472650
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perfectly eliminate fluid leakage due to non-metal substances in material by providing a valve seat which has cleanliness of 0.05% or lower, and is formed of alloy containing Ni, Cr, Mo, C, Si, Mn, P, Cu and Al with a specified wt.% condition.
SOLUTION: A valve seat 1d is formed on a bottom of a recessed valve chamber 1c communicated with an inflow passage 1a and an outflow passage 1b of a body 1. The valve seat 1d, having cleanliness of 0.05% or lower, is formed of alloy containing Ni 12.90 to 15.00wt.%, Cr 16.50 to 18.00wt.%, Mo 2.00 to 3.00wt.%, C 0.02wt.% or lower, Si 0.030wt.% or lower, Mn 0.40wt.% or lower, P 0.03wt.% or lower, S 0.0003wt.% or lower, Cu 0.25wt.% or lower, and Al 0.01wt.% or lower. Fluid leakage due to non-metal substances in material is thus perfectly eliminated.
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Inventors:
Tsutomu Shinohara
Shinichi Ikeda
Kazuhiro Yoshikawa
Tetsuya Kojima
Shinichi Ikeda
Kazuhiro Yoshikawa
Tetsuya Kojima
Application Number:
JP18738295A
Publication Date:
December 02, 2003
Filing Date:
July 24, 1995
Export Citation:
Assignee:
Fujikin Co., Ltd.
International Classes:
F16K7/14; F16K7/17; F16K25/00; F16K41/10; F16K41/12; (IPC1-7): F16K7/17
Domestic Patent References:
| JP6128701A | ||||
| JP7118808A | ||||
| JP6294471A |
Attorney, Agent or Firm:
Takeo Sugimoto