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Subject: Re: [DCHAS-L] Schlenk Line Survival Guide
Date: Wednesday, April 22, 2020 at 12:18:06 PM
Author: ILPI Support <info**At_Symbol_Here**ILPI.COM> 		Next by Date:
Subject: Re: [DCHAS-L] Schlenk Line Survival Guide
Date: Thu, 23 Apr 2020 04:25:27 +0000
Author: RAMPUR VISWANATH

From: davivid <davivid**At_Symbol_Here**WELL.COM>
Subject: Re: [DCHAS-L] Schlenk Line Survival Guide
Date: Wed, 22 Apr 2020 12:32:46 -0700
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 0f67acc4-efbd-1780-42be-98274e6dd069**At_Symbol_Here**well.com
In-Reply-To


One thing to remember when using Schlenk lines or other vacuum apparatus
is that commonly used Tygon (or other vinyl) tubing is somewhat air
permeable. I have seen a rise of several tens of mtorr in the ultimate
vacuum of a system when a ~1 foot section of 1/4" ID x 1/2" OD Tygon
line was added via well clamped hose barbs. Tubing specified for vacuum
use has much thicker walls but is much stiffer and more difficult to
manipulate and places more force on the glassware when bent.

Best regards
Dave Lane
Principal
Clavis Technology Development

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