Edward G Chandler

US Patent:

45627487, Jan 7, 1986

Filed:

Aug 16, 1984

Appl. No.:

6/641223

Inventors:

John E. Mrochek - Oak Ridge TN
Stanley R. Dinsmore - Norris TN
Edward W. Chandler - Knoxville TN

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 110

US Classification:

7386373

Abstract:

A four-port disc valve for sampling erosive, high temperature process streams. A rotatable disc defining opposed first and second sampling cavities rotates between fired faceplates defining flow passageways positioned to be alternatively in axial alignment with the first and second cavities. Silicon carbide inserts and liners composed of. alpha. silicon carbide are provided in the faceplates and in the sampling cavities to limit erosion while providing lubricity for a smooth and precise operation when used under harsh process conditions.