Concentration valve for a gas detecting apparatus, or the like

Details Concentration valve for a gas detecting apparatus, or the like Concentration valve for a gas detecting apparatus, or the like

1977-05-04

1978-12-05

Queisser, Richard C.

Measuring and testing

Measuring vessel

G01N 122

Patent

active

041280083

ABSTRACT:
A concentration valve for a gas detecting apparatus including a cylinder having diametrally opposed inlet and outlet ports for a sample gas and having diametrally opposed inlet and outlet ports for a carrier gas longitudinally spaced from and in the same longitudinal plane as the sample-gas inlet and outlet ports, a cylindrical plug having a diametral passage therethrough and movable longitudinally of the cylinder between a sampling position wherein the diametral passage communicates with the sample-gas inlet and outlet ports and an analyzing position wherein the diametral passage communicates with the carrier-gas inlet and outlet ports, a pneumatic actuator for longitudinally moving the cylindrical plug between the sampling and analyzing positions, gas adsorbing means in the diametral passage for adsorbing a gaseous material or materials from the sample gas, and means for heating the gas adsorbing means in the analyzing position of the cylindrical plug to desorb the previously adsorbed gaseous material or materials into the carrier gas for transfer to a gas chromatograph, or other analyzing means. The pneumatic actuating means comprises a piston to which the cylindrical plug is secured by a readily releasable connecting means so that it can be removed for replacement by one capable of adsorbing a different material.

REFERENCES:
patent: 3160015 (1964-12-01), Charlton et al.
patent: 3345858 (1967-10-01), Fenske
patent: 3362228 (1968-01-01), Stuben
patent: 3675466 (1972-07-01), Linenberg
patent: 3681996 (1972-08-01), Crist
patent: 3733908 (1973-05-01), Linenberg
patent: 3933165 (1976-01-01), Budzak et al.

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