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Mirror-finished, surface-seal-type gate valve with a long life of about
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We have fabricated a mirror-finished, surface-seal-type gate valve with diaphragms made of silver and with independent compressed air systems for the seal diaphragms and seal bellows. The previous design had diaphragms made from an aluminum alloy and a common air system for the seal diaphragms and seal bellows. For the new design, after 9523 open/close sequences, a stainless steel bellows for the isolation plate vertical motion broke. However, this is a lifetime improvement of more than one order of magnitude over the old design. Further improvement of the bellows can lead to an even longer lifetime for the valve. © 1997 American Vacuum Society.
Published in:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
(Volume:15
,
Issue:
4
)
Date of Publication: Jul 1997
- Page(s):
- 2388 - 2390
- ISSN :
- 0734-2101
- Digital Object Identifier :
- 10.1116/1.580752
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Jul 1997
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