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Author Stringer, J. ♦ Blevins, J.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1991
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Valves ♦ Seals ♦ Pumps ♦ Contamination ♦ Vacuum systems ♦ Thermal resistance ♦ Atmosphere ♦ Assembly ♦ Elementary particle vacuum ♦ Airports
Abstract A large-diameter valve suitable for high vacuum operation is under study for ITER (International Thermonuclear Experimental Reactor) torus evacuation. The valves must comply with specifications for leak-tightness, radiation resistance, dust tolerance, overpressure, and thermal gradients. Remote maintenance of the seal and valve moving parts without disturbance to the rest of the valve system is a requirement. The authors describe two methods of seal exchange by remote means. In the first method, a flask is proposed for the valve moving parts exchange in inert gas, when the machine is shut down. In the second method a novel concept is described for seal exchange while under vacuum, without having to bring the machine up to atmosphere. The advantages of this method are that scheduled remote handling operations and outages for seal replacement are not required. Also, the need for a flask is avoided.<<ETX>>
Description Author affiliation: Wardrop Engineering Inc., Toronto, Ont., Canada (Stringer, J.)
ISBN 0780301323
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1991-09-30
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 218.47 kB
Page Count 4
Starting Page 576
Ending Page 579

Source: IEEE Xplore Digital Library