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Re: Creating vacuum

Posted By: Jan
Date: Sunday, 29 July 2007, at 8:02 a.m.

In Response To: Re: Creating vacuum (Dennis McInerney)


Hi Dennis

Thanks for the info. What type of foreline trap did you use, and what vacuum did you obtain without the trap? Some background to this question: Traditional foreline traps use mole sieve pellets, which I believe is difficult to regenerate due to poor heat transfer.

A better(?) design is described in "The Bell Jar". See
http://www.belljar.net/82trap.pdf

This design is marketed by Lesker under the name "Micromaze". See
http://www.lesker.com/newweb/traps/forelinetraps_absorbentplate_micromaze.cfm?pgid=0

An example of the old traps can be found at
http://www.lesker.com/newweb/traps/forelinetraps_molecularsieve.cfm?pgid=inlinestraight

Jan


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