Measuring and testing – Sampler – sample handling – etc. – Conduit or passageway section capture chamber
Patent
1992-01-27
1994-01-11
Noland, Tom
Measuring and testing
Sampler, sample handling, etc.
Conduit or passageway section capture chamber
73 2341, 7386312, 7386385, 7386386, 7386483, 277 3, 277 71, 277DIG8, G01N 3020, G01N 120, F16J 1556, F16K 4102
Patent
active
052770737
ABSTRACT:
An on-line gas chromatographic liquid inject valve which comprises (a) a sampling shaft having a channel defined therein which is reciprocal between a sampling position wherein a liquid stream flows across the shaft and through the channel and an inject position wherein the channel traverses a length of a seal and delivers a liquid sample carried from the liquid stream in the channel to a gas chromatograph for analysis, (b) a fluid-driven piston- or plunger-type arrangement at an outer end of the shaft for causing the sampling shaft to reciprocate between the sampling position and the inject position, (c) a seal around the sampling shaft and between the liquid stream and the gas chromatograph in use of the valve, and (d) a fluid-driven piston having a central opening defined therein in which the sampling shaft reciprocates, and which bears against the seal for placing and maintaining a constant pressure against the seal as the seal wears from frictional contact between the sampling shaft and the seal.
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"Water-Cooled Sample Injection Port for High Temperature Gas Chromatography"; J. Chromatog., 5, (1961), pp. 88-89 by P. G. Elsey et al.
"A Chromatography Unit, with Automatic Sampling, for Kinetic Studies", J. Appl. Chem., 13, Jan. 1963, pp. 12-14, J. Spolnicki et al.
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Illustration entitled "Liquid Sample Valve (Standard) P. N. 101 205 Cross-Section", 1 page, Dow Chemical, dated Mar. 30, 1990.
Everitt Oscar C.
Ruiz Frank A.
Noland Tom
The Dow Chemical Company
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