Inlet valve for a high-vacuum analyzer with bypass evacuation

Details Inlet valve for a high-vacuum analyzer with bypass evacuation Inlet valve for a high-vacuum analyzer with bypass evacuation

1993-01-27

1995-04-11

Noland, Thomas P.

Measuring and testing

Sampler, sample handling, etc.

Analyzer supplier

250288, F16K 5102, G01N 3700

Patent

active

054047650

ABSTRACT:
An ultra-high vacuum valve for the admission of substance mixtures into an analytical measuring instrument limits the flow path of the substances to as small a flow chamber as possible with controllable chamber wall adsorption properties. The elastic wall sections necessary for movement of the valve piston are located in a mechanical chamber separated from the flow chamber by a wall. The mechanical chamber is evacuated by means of a separate vacuum duct and a seal is used to seal the valve piston where it passes through the wall.

REFERENCES:
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patent: 2721270 (1955-10-01), Bennett
patent: 2769912 (1956-11-01), Lupfer et al.
patent: 3014128 (1961-12-01), Taubert
patent: 3187179 (1965-06-01), Craig et al.
patent: 3458699 (1969-07-01), Padrta
patent: 3471692 (1969-10-01), Llewellyn et al.
patent: 3594574 (1971-07-01), Morgan et al.
patent: 4213326 (1980-07-01), Brodasky
patent: 4399690 (1983-08-01), Fruzzetti
patent: 4590371 (1986-05-01), Ottley
patent: 4672203 (1987-06-01), Holkebuer
patent: 5197712 (1993-03-01), Engelhardt
Vacuum Technology, Alexander Roth, (1976), pp. 340, 426-427, Elsevier Science Publishers B.V., 1976, 1982, 1990.
Ultrahigh Vacuum Practice, G. F. Weston, (1985), PP. 23-25 Butterworth & Co., Ltd.

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