Check valve

Details Check valve Check valve

1989-03-03

1991-03-26

Nilson, Robert G.

Liquid purification or separation

With means to add treating material

Chromatography

210101, 210136, 137512, 13753311, 251368, B01D 1508

Patent

active

050026623

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
patent: 4832075 (1989-05-01), Dubach

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