Fluid controller

Details Fluid controller Fluid controller

1996-07-22

1997-10-21

Chambers, A. Michael

Valves and valve actuation

Valve

Materials

2513352, 2513353, F16K 3100

Patent

active

056788037

ABSTRACT:
Flaws in a fluid controller caused by nonmetallic inclusions in material during machining of a contact surface of a valve seat are prevented by forming the valve seat of corrosion-resistant high-cleanliness material. The valve seat of the fluid controller is formed from corrosion-resistant alloy with 0.05% or less cleanliness and containing in weight ratio 12.90-15.00% Ni, 16.50-18.00% Cr, 2.00-3.00% Mo, 0.02% or less C, 0.30% or less Si, 0.40% or less Mn, 0.03% or less P, 0.003% or less S, 0.25% or less Cu, and 0.01% or less Al. Fluid leakage is almost completely prevented (100%) by such a valve seat.

REFERENCES:
patent: 4723518 (1988-02-01), Kawasaki et al.
patent: 4754950 (1988-07-01), Jada et al.
patent: 4995589 (1991-02-01), Adishian et al.
patent: 5031878 (1991-07-01), Ishikawa et al.
patent: 5295662 (1994-03-01), Yamaji et al.
patent: 5351936 (1994-10-01), Tonikawa et al.

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