1988-09-07
1989-09-05
Nilson, Robert G.
Fluid handling
Processes
137512, 13753311, 251368, F16K 1504
Patent
active
048629073
ABSTRACT:
An improved liquid flow check valve using a ball and seat wherein the seat is made of sintered ceramic. The improved valve will operate in an environment of acetonitrile and water without sticking shut, thereby providing more stable liquid flow rates in liquid chromatography systems.
REFERENCES:
patent: 2695628 (1954-11-01), Wheildon
patent: 4139469 (1979-02-01), Rainin
patent: 4228821 (1980-10-01), Stark
patent: 4781213 (1988-11-01), Kilayko
Ledtje Marvin L.
Long, Jr. Aubrey D.
Nilson Robert G.
Spectra-Physics Inc.
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