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Title: Method and system for measuring gate valve clearances and seating force

Valve clearances and seating force, as well as other valve operational parameters, are determined by measuring valve stem rotation during opening and closing operations of a translatable gate valve. The magnitude of the stem rotation, and the relative difference between the stem rotation on opening and closing provides valuable data on the valve internals in a non-intrusive manner.
Inventors:
 [1];  [1];  [2];  [3]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
  3. (Burns, TN)
Issue Date:
OSTI Identifier:
870269
Assignee:
Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5487302
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
method; measuring; gate; valve; clearances; seating; force; operational; parameters; determined; rotation; closing; operations; translatable; magnitude; relative; difference; provides; valuable; data; internals; non-intrusive; manner; valve internals; gate valve; valve internal; non-intrusive manner; operational parameters; seating force; valve clearances; closing operation; /73/